38.3. Configuring Abilis Ip Tunnels (AIPT)

38.3. Configuring Abilis Ip Tunnels (AIPT)
	Chapter 38. Tunneling proprietary protocols

Abilis Ip Tunnel is a virtual tunnel typically used for Data and Voice communications between Abilis.

To setup an Abilis IP Tunnel, first add an IP resource:

a res:ip-<id> subtype:<value>

id is simply the identification number and subtype is the kind of resource to be used. The following command shows supported subtypes.

[14:58:13] ABILIS_CPX_1:a res:ip-2 subtype: ?

Ip resource subtypes:

X25PVC          IP over X.25 Pvc
X25BSVC         IP over X.25 Bsvc
LAN             IP over LAN
DL              IP over Dedicated Line
DL-BCK          IP over Dedicated Line with Abilis Back-up
BCH             IP over B-Channel
ML              IP over Multi-Links
AIPT            IP over IP (Abilis tunnel)
AIPT-BCK        IP over IP (Abilis tunnel) with Abilis Back-up
PPP             IP over PPP
VIRTUAL         IP virtual

38.3.1. Abilis IP Tunnel over IP – Extended Mode

The extended mode is used when both Abilis have a static IP address.

The following example considers two Abilis with a static public IP address each one.

Public IP address of “Abilis 1” (ABILIS_CPX_1): 217.1.1.1
Private IP address of “Abilis 1” (ABILIS_CPX_1): 192.168.0.254/24
Public IP address of “Abilis 2” (ABILIS_CPX_2): 217.2.2.2
Private IP address of “Abilis 2” (ABILIS_CPX_2): 192.168.1.254/24

First, add a new resource on both Abilis:

[14:58:52] ABILIS_CPX_1:a res:ip-5 subtype:aipt

COMMAND EXECUTED

[15:06:29] ABILIS_CPX_1:d p ip-5

RES:Ip-5 - Not Saved (SAVE CONF) ----------------------------------------------
       - IP over IP (Abilis tunnel) (AIPT) ------------------------------------
       DESCR:
       OPSTATE:UP             LOG:NO               STATE-DETECT:NORMAL
                              FRAG:NO
       IPADD:000.000.000.000  MASK:255.255.255.255   NEIGH:000.000.000.000
       REDIS:YES     HIDE:NO         RP:NONE            IPSEC:NO       VRRP:NO
       NAT:NO                        DIFFSERV:NO        DDNS:NO
       OUTBUF:100    OUTQUEUE:FAIR   MTU:1500
       OUTSPL:NO
       INBUF:0                      mru:1500           SRCV:NO
       - TRFA section ---------------------------------------------------------
       TRFA:NO
       - Link -----------------------------------------------------------------
       LLOG:DS       LMPX:YES         LC:YES         LCOMP:NO      LCR:NO
       LT1:3000      LT3:9000         LN2:3                        LCRKEY:DFT
       - IP Tunnel ------------------------------------------------------------
       TLOG:NO       MODE:STD         D-TOS:0-N      V-TOS:0-D     C-TOS:0-D
       MPX:NO
                     LOCPORT:2105     REMPORT:2100   CR:NO         CRKEY:DFT
       OUT-IP:AUTO
       LOCIPADD:R-ID (192.168.000.254)  REMIPADD:#

[14:58:14] ABILIS_CPX_2:a res:ip-5 subtype:aipt

COMMAND EXECUTED

[15:06:37] ABILIS_CPX_2:d p ip-5

RES:Ip-5 - Not Saved (SAVE CONF) ----------------------------------------------
       - IP over IP (Abilis tunnel) (AIPT) ------------------------------------
       DESCR:
       OPSTATE:UP             LOG:NO               STATE-DETECT:NORMAL
                              FRAG:NO
       IPADD:000.000.000.000  MASK:255.255.255.255   NEIGH:000.000.000.000
       REDIS:YES     HIDE:NO         RP:NONE            IPSEC:NO       VRRP:NO
       NAT:NO                        DIFFSERV:NO        DDNS:NO
       OUTBUF:100    OUTQUEUE:FAIR   MTU:1500
       OUTSPL:NO
       INBUF:0                      mru:1500           SRCV:NO
       - TRFA section ---------------------------------------------------------
       TRFA:NO
       - Link -----------------------------------------------------------------
       LLOG:DS       LMPX:YES         LC:YES         LCOMP:NO      LCR:NO
       LT1:3000      LT3:9000         LN2:3                        LCRKEY:DFT
       - IP Tunnel ------------------------------------------------------------
       TLOG:NO       MODE:STD         D-TOS:0-N      V-TOS:0-D     C-TOS:0-D
       MPX:NO
                     LOCPORT:2105     REMPORT:2100   CR:NO         CRKEY:DFT
       OUT-IP:AUTO
       LOCIPADD:R-ID (192.168.001.254)  REMIPADD:#

The most important parameters to configure are:

DESCR: description of the resource.
MODE: operating mode.
LOCPORT: UDP port number of the local ABILIS (port used for the data exchange).
REMPORT: UDP port number of the remote ABILIS.
LOCIPADD: IP address of the local ABILIS.
REMIPADD: IP address of the remote ABILIS.
NEIGH: IP address of the neighbour router (the other Abilis).
MASK: mask of remote LAN.
NAT: NAT usage.
LCR: Encryption/Decryption activation.
FRAG: link fragmentation.
FRAGSIZE: maximum size of link frames fragments.

	Tip
	The above parameters must mirror each other (i.e. the value of `LOCPORT` on “Abilis 1” must be the same of `REMPORT` on “Abilis 2” and vice versa; the same for `LOCIPADD/REMIPADD`).

[15:17:46] ABILIS_CPX_1:s p ip-5 descr:To_Abilis_2 neigh:192.168.1.254 mask:255.255.255.0 nat:inside frag:frf12 fragsize:800 lcr:data
mode:ext remport:2105 locipadd:217.1.1.1 remipadd:217.2.2.2

COMMAND EXECUTED

[15:21:02] ABILIS_CPX_1:d p ip-5

RES:Ip-5 - Not Saved (SAVE CONF) ----------------------------------------------
       - IP over IP (Abilis tunnel) (AIPT) ------------------------------------
       DESCR:To_Abilis_2
       OPSTATE:UP             LOG:NO               STATE-DETECT:NORMAL
                              FRAG:FRF12             FRAGSIZE:800
       IPADD:000.000.000.000  MASK:255.255.255.000   NEIGH:192.168.001.254
       REDIS:YES     HIDE:NO         RP:NONE            IPSEC:NO       VRRP:NO
       NAT:INSIDE    UPNP:NO         DIFFSERV:NO        DDNS:NO
       OUTBUF:100    OUTQUEUE:FAIR   MTU:1500
       OUTSPL:NO
       INBUF:0                      mru:1500           SRCV:NO
       - TRFA section ---------------------------------------------------------
       TRFA:NO
       - Link -----------------------------------------------------------------
       LLOG:DS       LMPX:YES         LC:YES         LCOMP:NO      LCR:DATA
       LT1:3000      LT3:9000         LN2:3                        LCRKEY:DFT
       - IP Tunnel ------------------------------------------------------------
       TLOG:NO       MODE:EXT         D-TOS:0-N      V-TOS:0-D     C-TOS:0-D
       MPX:NO        RS-BUF:100       D-TOUT:1000    V-TOUT:100    V-RED:NONE
       PATH:SINGLE   LOCPORT:2105     REMPORT:2105   CR:NO         CRKEY:DFT
       OUT-IP:AUTO
       LOCIPADD:217.001.001.001         REMIPADD:217.002.002.002

[15:06:44] ABILIS_CPX_2:s p ip-5 descr:To_Abilis_1 neigh:192.168.0.254 mask:255.255.255.0 nat:inside frag:frf12 fragsize:800 lcr:data
mode:ext remport:2105 locipadd:217.2.2.2 remipadd:217.1.1.1

COMMAND EXECUTED

[15:22:37] ABILIS_CPX_2:d p ip-5

RES:Ip-5 - Not Saved (SAVE CONF) ----------------------------------------------
       - IP over IP (Abilis tunnel) (AIPT) ------------------------------------
       DESCR:To_Abilis_1
       OPSTATE:UP             LOG:NO               STATE-DETECT:NORMAL
                              FRAG:FRF12             FRAGSIZE:800
       IPADD:000.000.000.000  MASK:255.255.255.000   NEIGH:192.168.000.254
       REDIS:YES     HIDE:NO         RP:NONE            IPSEC:NO       VRRP:NO
       NAT:INSIDE    UPNP:NO         DIFFSERV:NO        DDNS:NO
       OUTBUF:100    OUTQUEUE:FAIR   MTU:1500
       OUTSPL:NO
       INBUF:0                      mru:1500           SRCV:NO
       - TRFA section ---------------------------------------------------------
       TRFA:NO
       - Link -----------------------------------------------------------------
       LLOG:DS       LMPX:YES         LC:YES         LCOMP:NO      LCR:DATA
       LT1:3000      LT3:9000         LN2:3                        LCRKEY:DFT
       - IP Tunnel ------------------------------------------------------------
       TLOG:NO       MODE:EXT         D-TOS:0-N      V-TOS:0-D     C-TOS:0-D
       MPX:NO        RS-BUF:100       D-TOUT:1000    V-TOUT:100    V-RED:NONE
       PATH:SINGLE   LOCPORT:2105     REMPORT:2105   CR:NO         CRKEY:DFT
       OUT-IP:AUTO
       LOCIPADD:217.002.002.002         REMIPADD:217.001.001.001

	Tip
	Saving the configuration with save conf command, the validation procedure will automatically change the parameter `MPX` (Multiplexing) from `NO` to `YES`. Also `LMPX` will be changed from `YES` to `EXT`: it can be set to `YES` only for data protocols `LAPB` and `LINK-FR` (this VPN is based on UDP protocol).

	Tip
	Activation of Link Check protocol is recommended (`LC`:`YES`): the parameter must be set at the same value on both Abilis or the VPN will not work.

	Tip
	Encryption of data packets has been activated (`LCR`:`DATA`) and the default Encryption Key has been used (`LCRKEY`:`DFT`). Usage of encryption is useful to increase the security of data transmission.

	Tip
	Fragmentation has been activated (`FRAG`:`FRF12` `FRAGSIZE`:`800`): it's recommended on VPN realized over Internet lines.

[15:21:05] ABILIS_CPX_1:save conf

VALIDATION IN PROGRESS ...
WARNING: RES:Iprtr Changed "LINKS:" from 1 to 2
WARNING: RES:IP-5 Changed "LMPX" from YES to EXT
WARNING: RES:IP-5 Changed Abilis IP Tunnel "MPX" from NO to YES, because Link "LMPX" = EXT
VALIDATION SUCCESSFULLY EXECUTED

SAVE EXECUTED

[15:21:29] ABILIS_CPX_1:d p ip-5

RES:Ip-5 - IP over IP (Abilis tunnel) (AIPT) ----------------------------------
       DESCR:To_Abilis_2
       OPSTATE:UP             LOG:NO               STATE-DETECT:NORMAL
                              FRAG:FRF12             FRAGSIZE:800
       IPADD:000.000.000.000  MASK:255.255.255.000   NEIGH:192.168.001.254
       REDIS:YES     HIDE:NO         RP:NONE            IPSEC:NO       VRRP:NO
       NAT:INSIDE    UPNP:NO         DIFFSERV:NO        DDNS:NO
       OUTBUF:100    OUTQUEUE:FAIR   MTU:1500
       OUTSPL:NO
       INBUF:0                      mru:1500           SRCV:NO
       - TRFA section ---------------------------------------------------------
       TRFA:NO
       - Link -----------------------------------------------------------------
       LLOG:DS       LMPX:EXT         LC:YES         LCOMP:NO      LCR:DATA
       LT1:3000      LT3:9000         LN2:3                        LCRKEY:DFT
       - IP Tunnel ------------------------------------------------------------
       TLOG:NO       MODE:EXT         D-TOS:0-N      V-TOS:0-D     C-TOS:0-D
       MPX:YES       RS-BUF:100       D-TOUT:1000    V-TOUT:100    V-RED:NONE
       PATH:SINGLE   LOCPORT:2105     REMPORT:2105   CR:NO         CRKEY:DFT
       OUT-IP:AUTO
       LOCIPADD:217.001.001.001         REMIPADD:217.002.002.002

[15:22:40] ABILIS_CPX_2:save conf

VALIDATION IN PROGRESS ...
WARNING: RES:Iprtr Changed "LINKS:" from 1 to 2
WARNING: RES:IP-5 Changed "LMPX" from YES to EXT
WARNING: RES:IP-5 Changed Abilis IP Tunnel "MPX" from NO to YES, because Link "LMPX" = EXT
VALIDATION SUCCESSFULLY EXECUTED

SAVE EXECUTED

[16:22:53] ABILIS_CPX_2:d p ip-5

RES:Ip-5 - IP over IP (Abilis tunnel) (AIPT) ----------------------------------
       DESCR:To_Abilis_1
       OPSTATE:UP             LOG:NO               STATE-DETECT:NORMAL
                              FRAG:FRF12             FRAGSIZE:800
       IPADD:000.000.000.000  MASK:255.255.255.000   NEIGH:192.168.000.254
       REDIS:YES     HIDE:NO         RP:NONE            IPSEC:NO       VRRP:NO
       NAT:INSIDE    UPNP:NO         DIFFSERV:NO        DDNS:NO
       OUTBUF:100    OUTQUEUE:FAIR   MTU:1500
       OUTSPL:NO
       INBUF:0                      mru:1500           SRCV:NO
       - TRFA section ---------------------------------------------------------
       TRFA:NO
       - Link -----------------------------------------------------------------
       LLOG:DS       LMPX:EXT         LC:YES         LCOMP:NO      LCR:DATA
       LT1:3000      LT3:9000         LN2:3                        LCRKEY:DFT
       - IP Tunnel ------------------------------------------------------------
       TLOG:NO       MODE:EXT         D-TOS:0-N      V-TOS:0-D     C-TOS:0-D
       MPX:YES       RS-BUF:100       D-TOUT:1000    V-TOUT:100    V-RED:NONE
       PATH:SINGLE   LOCPORT:2105     REMPORT:2105   CR:NO         CRKEY:DFT
       OUT-IP:AUTO
       LOCIPADD:217.002.002.002         REMIPADD:217.001.001.001

Now the configuration of the VPN is completed.

Tip

Interesting chapters:

Section 68.13.1, “How to configure a VPN tunnel where both Abilis have a static public IP address”;

Section 20.3, “IP Resources”.

38.3.2. Abilis IP Tunnel over IP - Extended-Server/Extended Client Mode

This mode permits to configure a VPN between two Abilis when one of them hasn't a static public IP address or is placed behind a router doing NAT/PAT.

Example: Abilis has a static public IP address and the other one has a dynamic public IP address:

Public IP address of “Abilis 1” (ABILIS_CPX_1): 217.1.1.1
Private IP address of “Abilis 1” (ABILIS_CPX_1): 192.168.0.254/24
Public IP address of “Abilis 2” (ABILIS_CPX_2): dynamic
Private IP address of “Abilis 2” (ABILIS_CPX_2): 192.168.1.254/24

“ABILIS 1” will be set as EXT-SERVER; “ABILIS_CPX_2” will be set as EXT-CLIENT.

First, add a new resource on both Abilis:

[14:58:52] ABILIS_CPX_1:a res:ip-5 subtype:aipt

COMMAND EXECUTED

[15:06:29] ABILIS_CPX_1:d p ip-5

RES:Ip-5 - Not Saved (SAVE CONF) ----------------------------------------------
       - IP over IP (Abilis tunnel) (AIPT) ------------------------------------
       DESCR:
       OPSTATE:UP             LOG:NO               STATE-DETECT:NORMAL
                              FRAG:NO
       IPADD:000.000.000.000  MASK:255.255.255.255   NEIGH:000.000.000.000
       REDIS:YES     HIDE:NO         RP:NONE            IPSEC:NO       VRRP:NO
       NAT:NO                        DIFFSERV:NO        DDNS:NO
       OUTBUF:100    OUTQUEUE:FAIR   MTU:1500
       OUTSPL:NO
       INBUF:0                      mru:1500           SRCV:NO
       - TRFA section ---------------------------------------------------------
       TRFA:NO
       - Link -----------------------------------------------------------------
       LLOG:DS       LMPX:YES         LC:YES         LCOMP:NO      LCR:NO
       LT1:3000      LT3:9000         LN2:3                        LCRKEY:DFT
       - IP Tunnel ------------------------------------------------------------
       TLOG:NO       MODE:STD         D-TOS:0-N      V-TOS:0-D     C-TOS:0-D
       MPX:NO
                     LOCPORT:2105     REMPORT:2100   CR:NO         CRKEY:DFT
       OUT-IP:AUTO
       LOCIPADD:R-ID (192.168.000.254)  REMIPADD:#

[14:58:14] ABILIS_CPX_2:a res:ip-5 subtype:aipt

COMMAND EXECUTED

[15:06:37] ABILIS_CPX_2:d p ip-5

RRES:Ip-5 - Not Saved (SAVE CONF) ----------------------------------------------
       - IP over IP (Abilis tunnel) (AIPT) ------------------------------------
       DESCR:
       OPSTATE:UP             LOG:NO               STATE-DETECT:NORMAL
                              FRAG:NO
       IPADD:000.000.000.000  MASK:255.255.255.255   NEIGH:000.000.000.000
       REDIS:YES     HIDE:NO         RP:NONE            IPSEC:NO       VRRP:NO
       NAT:NO                        DIFFSERV:NO        DDNS:NO
       OUTBUF:100    OUTQUEUE:FAIR   MTU:1500
       OUTSPL:NO
       INBUF:0                      mru:1500           SRCV:NO
       - TRFA section ---------------------------------------------------------
       TRFA:NO
       - Link -----------------------------------------------------------------
       LLOG:DS       LMPX:YES         LC:YES         LCOMP:NO      LCR:NO
       LT1:3000      LT3:9000         LN2:3                        LCRKEY:DFT
       - IP Tunnel ------------------------------------------------------------
       TLOG:NO       MODE:STD         D-TOS:0-N      V-TOS:0-D     C-TOS:0-D
       MPX:NO
                     LOCPORT:2105     REMPORT:2100   CR:NO         CRKEY:DFT
       OUT-IP:AUTO
       LOCIPADD:R-ID (192.168.001.254)  REMIPADD:#

In EXT-SERVER and EXT-CLIENT modality, new parameters will appear:

[17:34:37] ABILIS_CPX_1:s p ip-5 mode:ext-server

COMMAND EXECUTED

[17:34:54] ABILIS_CPX_1:d p ip-5

RES:Ip-5 - Not Saved (SAVE CONF) ----------------------------------------------
       - IP over IP (Abilis tunnel) (AIPT) ------------------------------------
       DESCR:
       OPSTATE:UP             LOG:NO               STATE-DETECT:NORMAL
                              FRAG:NO
       IPADD:000.000.000.000  MASK:255.255.255.255   NEIGH:000.000.000.000
       REDIS:YES     HIDE:NO         RP:NONE            IPSEC:NO       VRRP:NO
       NAT:NO                        DIFFSERV:NO        DDNS:NO
       OUTBUF:100    OUTQUEUE:FAIR   MTU:1500
       OUTSPL:NO
       INBUF:0                      mru:1500           SRCV:NO
       - TRFA section ---------------------------------------------------------
       TRFA:NO
       - Link -----------------------------------------------------------------
       LLOG:DS       LMPX:YES         LC:YES         LCOMP:NO      LCR:NO
       LT1:3000      LT3:9000         LN2:3                        LCRKEY:DFT
       - IP Tunnel ------------------------------------------------------------
       TLOG:NO       MODE:EXT-SERVER  D-TOS:0-N      V-TOS:0-D     C-TOS:0-D
       MPX:NO        RS-BUF:100       D-TOUT:1000    V-TOUT:100    V-RED:NONE
       PATH:SINGLE   LOCPORT:2105     REMPORT:2100   CR:NO         CRKEY:DFT
       CLI-ID:#
       OUT-IP:AUTO
       LOCIPADD:R-ID (192.168.000.254)  IP-FILTER:*

[17:34:45] ABILIS_CPX_2:s p ip-5 mode:ext-client

COMMAND EXECUTED

[17:35:13] ABILIS_CPX_2:d p ip-5

RES:Ip-5 - Not Saved (SAVE CONF) ----------------------------------------------
       - IP over IP (Abilis tunnel) (AIPT) ------------------------------------
       DESCR:
       OPSTATE:UP             LOG:NO               STATE-DETECT:NORMAL
                              FRAG:NO
       IPADD:000.000.000.000  MASK:255.255.255.255   NEIGH:000.000.000.000
       REDIS:YES     HIDE:NO         RP:NONE            IPSEC:NO       VRRP:NO
       NAT:NO                        DIFFSERV:NO        DDNS:NO
       OUTBUF:100    OUTQUEUE:FAIR   MTU:1500
       OUTSPL:NO
       INBUF:0                      mru:1500           SRCV:NO
       - TRFA section ---------------------------------------------------------
       TRFA:NO
       - Link -----------------------------------------------------------------
       LLOG:DS       LMPX:YES         LC:YES         LCOMP:NO      LCR:NO
       LT1:3000      LT3:9000         LN2:3                        LCRKEY:DFT
       - IP Tunnel ------------------------------------------------------------
       TLOG:NO       MODE:EXT-CLIENT  D-TOS:0-N      V-TOS:0-D     C-TOS:0-D
       MPX:NO        RS-BUF:100       D-TOUT:1000    V-TOUT:100    V-RED:NONE
       PATH:SINGLE   LOCPORT:2105     REMPORT:2100   CR:NO         CRKEY:DFT
       ID:R-ID (192.168.001.254)
       OUT-IP:AUTO
       LOCIPADD:R-ID (192.168.001.254)  REMIPADD:#

Configuration of both Abilis must mirror each other. This the meaning of the “new” parameters:

ID: on client side, is the identification IP address sent by the client to the server.
CLI-ID: on server side, is the client identifier IP address. It can be also a “virtual value”, but it must set at the same value of parameter ID on client side.

	Tip
	`ID` and `CLI-ID` can be also a “virtual values”, but they must set at the same value or the VPN will not work!

Configure on “Abilis 1”the following parameters:

DESCR: description of the resource.
LOCPORT: UDP port number of the local Abilis (port used for the data exchange).
REMPORT: UDP port number of the remote Abilis.
LOCIPADD: IP address of the local Abilis.
CLI-ID: client identifier IP address.
NEIGH: IP address of the neighbour router (the other Abilis).
MASK: mask of remote LAN.
NAT: NAT usage.
LCR: Encryption/Decryption activation.
FRAG: link fragmentation.
FRAGSIZE: maximum size of link frames fragments.

Configure on “Abilis 2”the following parameters:

DESCR: description of the resource.
LOCPORT: UDP port number of the local Abilis (port used for the data exchange).
REMPORT: UDP port number of the remote Abilis.
LOCIPADD: IP address of the local Abilis.
REMIPADD: IP address of the remote ABILIS
ID: identification IP address sent by the client to the server
NEIGH: IP address of the neighbour router (the other Abilis).
MASK: mask of remote LAN.
NAT: NAT usage.
LCR: Encryption/Decryption activation.
FRAG: link fragmentation.
FRAGSIZE: maximum size of link frames fragments.

[17:35:00] ABILIS_CPX_1:s p ip-5 descr:To_Abilis_2 neigh:192.168.1.254 mask:255.255.255.0 nat:inside frag:frf12 fragsize:800 lcr:data
remport:2105 cli-id:192.168.1.254 locipadd:217.1.1.1

COMMAND EXECUTED

[17:54:30] ABILIS_CPX_1:d p ip-5

RES:Ip-5 - Not Saved (SAVE CONF) ----------------------------------------------
       - IP over IP (Abilis tunnel) (AIPT) ------------------------------------
       DESCR:To_Abilis_2
       OPSTATE:UP             LOG:NO               STATE-DETECT:NORMAL
                              FRAG:FRF12             FRAGSIZE:800
       IPADD:000.000.000.000  MASK:255.255.255.000   NEIGH:192.168.001.254
       REDIS:YES     HIDE:NO         RP:NONE            IPSEC:NO       VRRP:NO
       NAT:INSIDE    UPNP:NO         DIFFSERV:NO        DDNS:NO
       OUTBUF:100    OUTQUEUE:FAIR   MTU:1500
       OUTSPL:NO
       INBUF:0                      mru:1500           SRCV:NO
       - TRFA section ---------------------------------------------------------
       TRFA:NO
       - Link -----------------------------------------------------------------
       LLOG:DS       LMPX:YES         LC:YES         LCOMP:NO      LCR:DATA
       LT1:3000      LT3:9000         LN2:3                        LCRKEY:DFT
       - IP Tunnel ------------------------------------------------------------
       TLOG:NO       MODE:EXT-SERVER  D-TOS:0-N      V-TOS:0-D     C-TOS:0-D
       MPX:NO        RS-BUF:100       D-TOUT:1000    V-TOUT:100    V-RED:NONE
       PATH:SINGLE   LOCPORT:2105     REMPORT:2105   CR:NO         CRKEY:DFT
       CLI-ID:192.168.001.254
       OUT-IP:AUTO
       LOCIPADD:217.001.001.001         IP-FILTER:*

[17:35:14] ABILIS_CPX_2:s p ip-5 descr:To_Abilis_1 neigh:192.168.0.254 mask:255.255.255.0 nat:inside frag:frf12 fragsize:800 lcr:data
remport:2105 id:192.168.1.254 locipadd:out-ip remipadd:217.1.1.1

COMMAND EXECUTED

[17:59:32] ABILIS_CPX_2:d p ip-5

RES:Ip-5 - Not Saved (SAVE CONF) ----------------------------------------------
       - IP over IP (Abilis tunnel) (AIPT) ------------------------------------
       DESCR:To_Abilis_1
       OPSTATE:UP             LOG:NO               STATE-DETECT:NORMAL
                              FRAG:FRF12             FRAGSIZE:800
       IPADD:000.000.000.000  MASK:255.255.255.000   NEIGH:192.168.000.254
       REDIS:YES     HIDE:NO         RP:NONE            IPSEC:NO       VRRP:NO
       NAT:INSIDE    UPNP:NO         DIFFSERV:NO        DDNS:NO
       OUTBUF:100    OUTQUEUE:FAIR   MTU:1500
       OUTSPL:NO
       INBUF:0                      mru:1500           SRCV:NO
       - TRFA section ---------------------------------------------------------
       TRFA:NO
       - Link -----------------------------------------------------------------
       LLOG:DS       LMPX:YES         LC:YES         LCOMP:NO      LCR:DATA
       LT1:3000      LT3:9000         LN2:3                        LCRKEY:DFT
       - IP Tunnel ------------------------------------------------------------
       TLOG:NO       MODE:EXT-CLIENT  D-TOS:0-N      V-TOS:0-D     C-TOS:0-D
       MPX:NO        RS-BUF:100       D-TOUT:1000    V-TOUT:100    V-RED:NONE
       PATH:SINGLE   LOCPORT:2105     REMPORT:2105   CR:NO         CRKEY:DFT
       ID:192.168.001.254
       OUT-IP:AUTO
       LOCIPADD:OUT-IP                  REMIPADD:217.001.001.001

	Tip
	Saving the configuration with save conf command, the validation procedure will automatically change the parameter `MPX` (Multiplexing) from `NO` to `YES`. Also `LMPX` will be changed from `YES` to `EXT`: it can be set to `YES` only for data protocols `LAPB` and `LINK-FR` (this VPN is based on UDP protocol).

	Tip
	Activation of Link Check protocol is recommended (`LC`:`YES`): the parameter must be set at the same value on both Abilis or the VPN will not work.

	Tip
	Encryption of data packets has been activated (`LCR`:`DATA`) and the default Encryption Key has been used (`LCRKEY`:`DFT`). Usage of encryption is useful to increase the security of data transmission.

	Tip
	Fragmentation has been activated (`FRAG`:`FRF12` `FRAGSIZE`:`800`): it's recommended on VPN realized over Internet lines.

[17:58:29] ABILIS_CPX_1:save conf

VALIDATION IN PROGRESS ...
WARNING: RES:IP-5 Changed "LMPX" from YES to EXT
WARNING: RES:IP-5 Changed Abilis IP Tunnel "MPX" from NO to YES, because Link "LMPX" = EXT
VALIDATION SUCCESSFULLY EXECUTED

SAVE EXECUTED

[18:04:10] ABILIS_CPX_1:d p ip-5

RES:Ip-5 - IP over IP (Abilis tunnel) (AIPT) ----------------------------------
       DESCR:To_Abilis_2
       OPSTATE:UP             LOG:NO               STATE-DETECT:NORMAL
                              FRAG:FRF12             FRAGSIZE:800
       IPADD:000.000.000.000  MASK:255.255.255.000   NEIGH:192.168.001.254
       REDIS:YES     HIDE:NO         RP:NONE            IPSEC:NO       VRRP:NO
       NAT:INSIDE    UPNP:NO         DIFFSERV:NO        DDNS:NO
       OUTBUF:100    OUTQUEUE:FAIR   MTU:1500
       OUTSPL:NO
       INBUF:0                      mru:1500           SRCV:NO
       - TRFA section ---------------------------------------------------------
       TRFA:NO
       - Link -----------------------------------------------------------------
       LLOG:DS       LMPX:EXT         LC:YES         LCOMP:NO      LCR:DATA
       LT1:3000      LT3:9000         LN2:3                        LCRKEY:DFT
       - IP Tunnel ------------------------------------------------------------
       TLOG:NO       MODE:EXT-SERVER  D-TOS:0-N      V-TOS:0-D     C-TOS:0-D
       MPX:YES       RS-BUF:100       D-TOUT:1000    V-TOUT:100    V-RED:NONE
       PATH:SINGLE   LOCPORT:2105     REMPORT:2105   CR:NO         CRKEY:DFT
       CLI-ID:192.168.001.254
       OUT-IP:AUTO
       LOCIPADD:217.001.001.001         IP-FILTER:*

[17:59:34] ABILIS_CPX_2:save conf

VALIDATION IN PROGRESS ...
WARNING: RES:IP-5 Changed "LMPX" from YES to EXT
WARNING: RES:IP-5 Changed Abilis IP Tunnel "MPX" from NO to YES, because Link "LMPX" = EXT
VALIDATION SUCCESSFULLY EXECUTED

SAVE EXECUTED

[18:04:28] ABILIS_CPX_2:d p ip-5

RES:Ip-5 - IP over IP (Abilis tunnel) (AIPT) ----------------------------------
       DESCR:To_Abilis_1
       OPSTATE:UP             LOG:NO               STATE-DETECT:NORMAL
                              FRAG:FRF12             FRAGSIZE:800
       IPADD:000.000.000.000  MASK:255.255.255.000   NEIGH:192.168.000.254
       REDIS:YES     HIDE:NO         RP:NONE            IPSEC:NO       VRRP:NO
       NAT:INSIDE    UPNP:NO         DIFFSERV:NO        DDNS:NO
       OUTBUF:100    OUTQUEUE:FAIR   MTU:1500
       OUTSPL:NO
       INBUF:0                      mru:1500           SRCV:NO
       - TRFA section ---------------------------------------------------------
       TRFA:NO
       - Link -----------------------------------------------------------------
       LLOG:DS       LMPX:EXT         LC:YES         LCOMP:NO      LCR:DATA
       LT1:3000      LT3:9000         LN2:3                        LCRKEY:DFT
       - IP Tunnel ------------------------------------------------------------
       TLOG:NO       MODE:EXT-CLIENT  D-TOS:0-N      V-TOS:0-D     C-TOS:0-D
       MPX:YES       RS-BUF:100       D-TOUT:1000    V-TOUT:100    V-RED:NONE
       PATH:SINGLE   LOCPORT:2105     REMPORT:2105   CR:NO         CRKEY:DFT
       ID:192.168.001.254
       OUT-IP:AUTO
       LOCIPADD:OUT-IP                  REMIPADD:217.001.001.001

Now the configuration of the VPN is completed.

Tip

Interesting chapters:

Section 68.13.2, “How to configure a VPN tunnel where one Abilis has a dynamic public IP address or is placed behind a router doing NAT/PAT”;

Section 20.3, “IP Resources”.

38.3.3. Abilis IP Tunnel over IP - Extended Mode with ISDN backup

In case of failure of the permanent VPN connection, the Abilis tunnels may be instantaneously switched onto ISDN backup lines. The AIPT subtype requested for this configuration is AIPT-BCK.

Example: two Abilis are placed in remote sides, each one has a with a static public IP address and a backup ISDN line:

Public IP address of “Abilis 1” (ABILIS_CPX_1): 217.1.1.1
Private IP address of “Abilis 1” (ABILIS_CPX_1): 192.168.0.254/24
ISDN line connected to “Abilis 1” (ABILIS_CPX_1): 01234567
Public IP address of “Abilis 2” (ABILIS_CPX_2): 217.2.2.2
Private IP address of “Abilis 2” (ABILIS_CPX_2): 192.168.1.254/24
ISDN line connected to “Abilis 2” (ABILIS_CPX_2): 01765432

First, add a new resource on both Abilis.

[15:35:35] ABILIS_CPX_1:a res:ip-5 subtype:aipt-bck

COMMAND EXECUTED

[15:36:01] ABILIS_CPX_1:d p ip-5

RES:Ip-5 - Not Saved (SAVE CONF) ----------------------------------------------
       - IP over IP (Abilis tunnel) with Abilis Back-up (AIPT-BCK) ------------
       DESCR:
       OPSTATE:UP             LOG:NO               STATE-DETECT:NORMAL
       BCKRES:CtiSLink
                              FRAG:NO
       IPADD:000.000.000.000  MASK:255.255.255.255   NEIGH:000.000.000.000
       REDIS:YES     HIDE:NO         RP:NONE            IPSEC:NO       VRRP:NO
       NAT:NO                        DIFFSERV:NO        DDNS:NO
       OUTBUF:100    OUTQUEUE:FAIR   MTU:1500
       OUTSPL:NO
       INBUF:0                      mru:1500           SRCV:NO
       - TRFA section ---------------------------------------------------------
       TRFA:NO
       - Link -----------------------------------------------------------------
       LLOG:DS       LMPX:YES         LC:YES         LCOMP:NO      LCR:NO
       LT1:3000      LT3:9000         LN2:3                        LCRKEY:DFT
       - IP Tunnel ------------------------------------------------------------
       TLOG:NO       MODE:STD         D-TOS:0-N      V-TOS:0-D     C-TOS:0-D
       MPX:NO
                     LOCPORT:2105     REMPORT:2100   CR:NO         CRKEY:DFT
       OUT-IP:AUTO
       LOCIPADD:R-ID (192.168.000.254)  REMIPADD:#
       - Back-Up --------------------------------------------------------------
       BRTY:LIN       BNRTY:0       BTB:3         BAC:DOD
       DDT:220        VDT:10        UDT:NOMAX
       CDI:*                        CDO:#
       CGI:*                        CGO:#
       SDI:*                        SDO:#
       SGI:DISABLED                 SGO:#

[15:35:35] ABILIS_CPX_2:a res:ip-5 subtype:aipt-bck

COMMAND EXECUTED

[15:36:08] ABILIS_CPX_2:d p ip-5

RES:Ip-5 - Not Saved (SAVE CONF) ----------------------------------------------
       - IP over IP (Abilis tunnel) with Abilis Back-up (AIPT-BCK) ------------
       DESCR:
       OPSTATE:UP             LOG:NO               STATE-DETECT:NORMAL
       BCKRES:CtiSLink
                              FRAG:NO
       IPADD:000.000.000.000  MASK:255.255.255.255   NEIGH:000.000.000.000
       REDIS:YES     HIDE:NO         RP:NONE            IPSEC:NO       VRRP:NO
       NAT:NO                        DIFFSERV:NO        DDNS:NO
       OUTBUF:100    OUTQUEUE:FAIR   MTU:1500
       OUTSPL:NO
       INBUF:0                      mru:1500           SRCV:NO
       - TRFA section ---------------------------------------------------------
       TRFA:NO
       - Link -----------------------------------------------------------------
       LLOG:DS       LMPX:YES         LC:YES         LCOMP:NO      LCR:NO
       LT1:3000      LT3:9000         LN2:3                        LCRKEY:DFT
       - IP Tunnel ------------------------------------------------------------
       TLOG:NO       MODE:STD         D-TOS:0-N      V-TOS:0-D     C-TOS:0-D
       MPX:NO
                     LOCPORT:2105     REMPORT:2100   CR:NO         CRKEY:DFT
       OUT-IP:AUTO
       LOCIPADD:R-ID (192.168.001.254)  REMIPADD:#
       - Back-Up --------------------------------------------------------------
       BRTY:LIN       BNRTY:0       BTB:3         BAC:DOD
       DDT:220        VDT:10        UDT:NOMAX
       CDI:*                        CDO:#
       CGI:*                        CGO:#
       SDI:*                        SDO:#
       SGI:DISABLED                 SGO:#

IP configuration of both Abilis remains the same shown Section 38.3.1, “Abilis IP Tunnel over IP – Extended Mode”. Consideration about ISDN Back-up configuration are the same reported here.

To complete the configuration type the following commands:

[16:37:00] ABILIS_CPX_1:s p ip-5 descr:To_Abilis_2 neigh:192.168.1.254 mask:255.255.255.0 nat:inside frag:frf12 fragsize:800 lcr:data
mode:ext remport:2105 locipadd:217.1.1.1 remipadd:217.2.2.2

COMMAND EXECUTED

[16:38:33] ABILIS_CPX_1:s p ip-5 brty:us bnrty:30 btb:10 sgi:abilis1-abilis2 sgo:abilis2-abilis1 cdo:01765432

COMMAND EXECUTED

[16:41:13] ABILIS_CPX_1:d p ip-5

RES:Ip-5 - Not Saved (SAVE CONF) ----------------------------------------------
       - IP over IP (Abilis tunnel) with Abilis Back-up (AIPT-BCK) ------------
       DESCR:To_Abilis_2
       OPSTATE:UP             LOG:NO               STATE-DETECT:NORMAL
       BCKRES:CtiSLink
                              FRAG:FRF12             FRAGSIZE:800
       IPADD:000.000.000.000  MASK:255.255.255.000   NEIGH:192.168.001.254
       REDIS:YES     HIDE:NO         RP:NONE            IPSEC:NO       VRRP:NO
       NAT:INSIDE    UPNP:NO         DIFFSERV:NO        DDNS:NO
       OUTBUF:100    OUTQUEUE:FAIR   MTU:1500
       OUTSPL:NO
       INBUF:0                      mru:1500           SRCV:NO
       - TRFA section ---------------------------------------------------------
       TRFA:NO
       - Link -----------------------------------------------------------------
       LLOG:DS       LMPX:YES         LC:YES         LCOMP:NO      LCR:DATA
       LT1:3000      LT3:9000         LN2:3                        LCRKEY:DFT
       - IP Tunnel ------------------------------------------------------------
       TLOG:NO       MODE:EXT         D-TOS:0-N      V-TOS:0-D     C-TOS:0-D
       MPX:NO        RS-BUF:100       D-TOUT:1000    V-TOUT:100    V-RED:NONE
       PATH:SINGLE   LOCPORT:2105     REMPORT:2105   CR:NO         CRKEY:DFT
       OUT-IP:AUTO
       LOCIPADD:217.001.001.001         REMIPADD:217.002.002.002
       - Back-Up --------------------------------------------------------------
       BRTY:US        BNRTY:30      BTB:10        BAC:DOD
       DDT:220        VDT:10        UDT:NOMAX
       CDI:*                        CDO:01765432
       CGI:*                        CGO:#
       SDI:*                        SDO:#
       SGI:ABILIS1-ABILIS2          SGO:ABILIS2-ABILIS1

[16:41:20] ABILIS_CPX_2:s p ip-5 descr:To_Abilis_1 neigh:192.168.0.254 mask:255.255.255.0 nat:inside frag:frf12 fragsize:800 lcr:data
mode:ext remport:2105 locipadd:217.2.2.2 remipadd:217.1.1.1

COMMAND EXECUTED

[16:40:04] ABILIS_CPX_2:s p ip-5 brty:us bnrty:30 btb:10 sgi:abilis2-abilis1 sgo:abilis1-abilis2 cdo:01234567

COMMAND EXECUTED

[16:42:55] ABILIS_CPX_2:d p ip-5

RES:Ip-5 - Not Saved (SAVE CONF) ----------------------------------------------
       - IP over IP (Abilis tunnel) with Abilis Back-up (AIPT-BCK) ------------
       DESCR:To_Abilis_1
       OPSTATE:UP             LOG:NO               STATE-DETECT:NORMAL
       BCKRES:CtiSLink
                              FRAG:FRF12             FRAGSIZE:800
       IPADD:000.000.000.000  MASK:255.255.255.000   NEIGH:192.168.000.254
       REDIS:YES     HIDE:NO         RP:NONE            IPSEC:NO       VRRP:NO
       NAT:INSIDE    UPNP:NO         DIFFSERV:NO        DDNS:NO
       OUTBUF:100    OUTQUEUE:FAIR   MTU:1500
       OUTSPL:NO
       INBUF:0                      mru:1500           SRCV:NO
       - TRFA section ---------------------------------------------------------
       TRFA:NO
       - Link -----------------------------------------------------------------
       LLOG:DS       LMPX:EXT         LC:YES         LCOMP:NO      LCR:DATA
       LT1:3000      LT3:9000         LN2:3                        LCRKEY:DFT
       - IP Tunnel ------------------------------------------------------------
       TLOG:NO       MODE:EXT         D-TOS:0-N      V-TOS:0-D     C-TOS:0-D
       MPX:YES       RS-BUF:100       D-TOUT:1000    V-TOUT:100    V-RED:NONE
       PATH:SINGLE   LOCPORT:2105     REMPORT:2105   CR:NO         CRKEY:DFT
       OUT-IP:AUTO
       LOCIPADD:217.002.002.002         REMIPADD:217.001.001.001
       - Back-Up --------------------------------------------------------------
       BRTY:US        BNRTY:30      BTB:10        BAC:DOD
       DDT:220        VDT:10        UDT:NOMAX
       CDI:*                        CDO:01234567
       CGI:*                        CGO:#
       SDI:*                        SDO:#
       SGI:ABILIS2-ABILIS1          SGO:ABILIS1-ABILIS2

	Tip
	Saving the configuration with save conf command, the validation procedure will automatically change the parameter `MPX` (Multiplexing) from `NO` to `YES`. Also `LMPX` will be changed from `YES` to `EXT`: it can be set to `YES` only for data protocols `LAPB` and `LINK-FR` (this VPN is based on UDP protocol).

	Tip
	Activation of Link Check protocol is recommended (`LC`:`YES`): the parameter must be set at the same value on both Abilis or the VPN will not work.

	Tip
	Encryption of data packets has been activated (`LCR`:`DATA`) and the default Encryption Key has been used (`LCRKEY`:`DFT`). Usage of encryption is useful to increase the security of data transmission.

	Tip
	Fragmentation has been activated (`FRAG`:`FRF12` `FRAGSIZE`:`800`): it's recommended on VPN realized over Internet lines.

[16:49:19] ABILIS_CPX_1:save conf

VALIDATION IN PROGRESS ...
WARNING: RES:IP-5 Changed "LMPX" from YES to EXT
WARNING: RES:IP-5 Changed Abilis IP Tunnel "MPX" from NO to YES, because Link "LMPX" = EXT
VALIDATION SUCCESSFULLY EXECUTED

SAVE EXECUTED

[16:49:22] ABILIS_CPX_1:d p ip-5

RES:Ip-5 - IP over IP (Abilis tunnel) with Abilis Back-up (AIPT-BCK) ----------
       DESCR:To_Abilis_2
       OPSTATE:UP             LOG:NO               STATE-DETECT:NORMAL
       BCKRES:CtiSLink
                              FRAG:FRF12             FRAGSIZE:800
       IPADD:000.000.000.000  MASK:255.255.255.000   NEIGH:192.168.001.254
       REDIS:YES     HIDE:NO         RP:NONE            IPSEC:NO       VRRP:NO
       NAT:INSIDE    UPNP:NO         DIFFSERV:NO        DDNS:NO
       OUTBUF:100    OUTQUEUE:FAIR   MTU:1500
       OUTSPL:NO
       INBUF:0                      mru:1500           SRCV:NO
       - TRFA section ---------------------------------------------------------
       TRFA:NO
       - Link -----------------------------------------------------------------
       LLOG:DS       LMPX:EXT         LC:YES         LCOMP:NO      LCR:DATA
       LT1:3000      LT3:9000         LN2:3                        LCRKEY:DFT
       - IP Tunnel ------------------------------------------------------------
       TLOG:NO       MODE:EXT         D-TOS:0-N      V-TOS:0-D     C-TOS:0-D
       MPX:YES       RS-BUF:100       D-TOUT:1000    V-TOUT:100    V-RED:NONE
       PATH:SINGLE   LOCPORT:2105     REMPORT:2105   CR:NO         CRKEY:DFT
       OUT-IP:AUTO
       LOCIPADD:217.001.001.001         REMIPADD:217.002.002.002
       - Back-Up --------------------------------------------------------------
       BRTY:US        BNRTY:30      BTB:10        BAC:DOD
       DDT:220        VDT:10        UDT:NOMAX
       CDI:*                        CDO:01765432
       CGI:*                        CGO:#
       SDI:*                        SDO:#
       SGI:ABILIS1-ABILIS2          SGO:ABILIS2-ABILIS1

[16:49:27] ABILIS_CPX_2:save conf

VALIDATION IN PROGRESS ...
WARNING: RES:IP-5 Changed "LMPX" from YES to EXT
WARNING: RES:IP-5 Changed Abilis IP Tunnel "MPX" from NO to YES, because Link "LMPX" = EXT
VALIDATION SUCCESSFULLY EXECUTED

SAVE EXECUTED

[16:49:29] ABILIS_CPX_2:d p ip-5

RES:Ip-5 - IP over IP (Abilis tunnel) with Abilis Back-up (AIPT-BCK) ----------
       DESCR:To_Abilis_1
       OPSTATE:UP             LOG:NO               STATE-DETECT:NORMAL
       BCKRES:CtiSLink
                              FRAG:FRF12             FRAGSIZE:800
       IPADD:000.000.000.000  MASK:255.255.255.000   NEIGH:192.168.000.254
       REDIS:YES     HIDE:NO         RP:NONE            IPSEC:NO       VRRP:NO
       NAT:INSIDE    UPNP:NO         DIFFSERV:NO        DDNS:NO
       OUTBUF:100    OUTQUEUE:FAIR   MTU:1500
       OUTSPL:NO
       INBUF:0                      mru:1500           SRCV:NO
       - TRFA section ---------------------------------------------------------
       TRFA:NO
       - Link -----------------------------------------------------------------
       LLOG:DS       LMPX:EXT         LC:YES         LCOMP:NO      LCR:DATA
       LT1:3000      LT3:9000         LN2:3                        LCRKEY:DFT
       - IP Tunnel ------------------------------------------------------------
       TLOG:NO       MODE:EXT         D-TOS:0-N      V-TOS:0-D     C-TOS:0-D
       MPX:YES       RS-BUF:100       D-TOUT:1000    V-TOUT:100    V-RED:NONE
       PATH:SINGLE   LOCPORT:2105     REMPORT:2105   CR:NO         CRKEY:DFT
       OUT-IP:AUTO
       LOCIPADD:217.002.002.002         REMIPADD:217.001.001.001
       - Back-Up --------------------------------------------------------------
       BRTY:US        BNRTY:30      BTB:10        BAC:DOD
       DDT:220        VDT:10        UDT:NOMAX
       CDI:*                        CDO:01234567
       CGI:*                        CGO:#
       SDI:*                        SDO:#
       SGI:ABILIS2-ABILIS1          SGO:ABILIS1-ABILIS2

Now the configuration of the VPN is completed.

Tip

Interesting chapters:

Section 68.13.3, “How to configure a VPN tunnel with the “backup over ISDN” option”;

Section 20.3, “IP Resources”.

38.3.4. Abilis IP Tunnel over IP - Extended Mode with Double Path

To increase the reliability of the VPN, it is possible to activate the ART (Abilis Redundant Tunneling) protocol, also named “Double Path”.

Tip

It is avdisable to use ART ONLY with lines with the same speed. In fact, if ART is used with lines with different speed, packets are sent with a maximum speed equal to that one of the slower line.

Moreover, if a line is saturated, the entire Tunnel doesn't work properly!

	Warning
	When double path is active the traffic is obviously duplicated: this could be very “dangerous” on pay per use lines!

Example: there are two Abilis. Each one has two different Internet lines with static public IP addresses.

First IP address of “Abilis 1” (ABILIS_CPX_1) : 217.1.1.1
Second IP address of “Abilis 1” (ABILIS_CPX_1): 80.80.80.80
Private IP address of “Abilis 1” (ABILIS_CPX_1): 192.168.0.254/24
First IP address of “Abilis 2” (ABILIS_CPX_2): 217.2.2.2
Second IP address of “Abilis 2” (ABILIS_CPX_2): 81.81.81.81
Private IP address of “Abilis 2” (ABILIS_CPX_2): 192.168.1.254/24

First, add a new resource on both Abilis:

[17:09:11] ABILIS_CPX_1:a res:ip-5 subtype:aipt

COMMAND EXECUTED

[17:10:18] ABILIS_CPX_1:d p ip-5

RES:Ip-5 - Not Saved (SAVE CONF) ----------------------------------------------
       - IP over IP (Abilis tunnel) (AIPT) ------------------------------------
       DESCR:
       OPSTATE:UP             LOG:NO               STATE-DETECT:NORMAL
                              FRAG:NO
       IPADD:000.000.000.000  MASK:255.255.255.255   NEIGH:000.000.000.000
       REDIS:YES     HIDE:NO         RP:NONE            IPSEC:NO       VRRP:NO
       NAT:NO                        DIFFSERV:NO        DDNS:NO
       OUTBUF:100    OUTQUEUE:FAIR   MTU:1500
       OUTSPL:NO
       INBUF:0                      mru:1500           SRCV:NO
       - TRFA section ---------------------------------------------------------
       TRFA:NO
       - Link -----------------------------------------------------------------
       LLOG:DS       LMPX:YES         LC:YES         LCOMP:NO      LCR:NO
       LT1:3000      LT3:9000         LN2:3                        LCRKEY:DFT
       - IP Tunnel ------------------------------------------------------------
       TLOG:NO       MODE:STD         D-TOS:0-N      V-TOS:0-D     C-TOS:0-D
       MPX:NO
                     LOCPORT:2105     REMPORT:2100   CR:NO         CRKEY:DFT
       OUT-IP:AUTO
       LOCIPADD:R-ID (192.168.000.254)  REMIPADD:#

[17:09:19] ABILIS_CPX_2:a res:ip-5 subtype:aipt

COMMAND EXECUTED

[17:10:13] ABILIS_CPX_2:d p ip-5

RES:Ip-5 - Not Saved (SAVE CONF) ----------------------------------------------
       - IP over IP (Abilis tunnel) (AIPT) ------------------------------------
       DESCR:
       OPSTATE:UP             LOG:NO               STATE-DETECT:NORMAL
                              FRAG:NO
       IPADD:000.000.000.000  MASK:255.255.255.255   NEIGH:000.000.000.000
       REDIS:YES     HIDE:NO         RP:NONE            IPSEC:NO       VRRP:NO
       NAT:NO                        DIFFSERV:NO        DDNS:NO
       OUTBUF:100    OUTQUEUE:FAIR   MTU:1500
       OUTSPL:NO
       INBUF:0                      mru:1500           SRCV:NO
       - TRFA section ---------------------------------------------------------
       TRFA:NO
       - Link -----------------------------------------------------------------
       LLOG:DS       LMPX:YES         LC:YES         LCOMP:NO      LCR:NO
       LT1:3000      LT3:9000         LN2:3                        LCRKEY:DFT
       - IP Tunnel ------------------------------------------------------------
       TLOG:NO       MODE:STD         D-TOS:0-N      V-TOS:0-D     C-TOS:0-D
       MPX:NO
                     LOCPORT:2105     REMPORT:2100   CR:NO         CRKEY:DFT
       OUT-IP:AUTO
       LOCIPADD:R-ID (192.168.001.254)  REMIPADD:#

Configuring MODE:EXT and PATH:DOUBLE new parameters will appear:

[17:18:28] ABILIS_CPX_1:s p ip-5 mode:ext path:double

COMMAND EXECUTED

[17:18:35] ABILIS_CPX_1:d p ip-5

RES:Ip-5 - Not Saved (SAVE CONF) ----------------------------------------------
       - IP over IP (Abilis tunnel) (AIPT) ------------------------------------
       DESCR:
       OPSTATE:UP             LOG:NO               STATE-DETECT:NORMAL
                              FRAG:NO
       IPADD:000.000.000.000  MASK:255.255.255.255   NEIGH:000.000.000.000
       REDIS:YES     HIDE:NO         RP:NONE            IPSEC:NO       VRRP:NO
       NAT:NO                        DIFFSERV:NO        DDNS:NO
       OUTBUF:100    OUTQUEUE:FAIR   MTU:1500
       OUTSPL:NO
       INBUF:0                      mru:1500           SRCV:NO
       - TRFA section ---------------------------------------------------------
       TRFA:NO
       - Link -----------------------------------------------------------------
       LLOG:DS       LMPX:YES         LC:YES         LCOMP:NO      LCR:NO
       LT1:3000      LT3:9000         LN2:3                        LCRKEY:DFT
       - IP Tunnel ------------------------------------------------------------
       TLOG:NO       MODE:EXT         D-TOS:0-N      V-TOS:0-D     C-TOS:0-D
       MPX:NO        RS-BUF:100       D-TOUT:1000    V-TOUT:100    V-RED:NONE
       PATH:DOUBLE   LOCPORT:2105     REMPORT:2100   CR:NO         CRKEY:DFT
       OUT-IP:AUTO
       LOCIPADD:R-ID (192.168.000.254)  REMIPADD:#
       OUT-IP2:AUTO
       LOCIPADD2:R-ID (192.168.000.254) REMIPADD2:#

[17:10:16] ABILIS_CPX_2:s p ip-5 mode:ext path:double

COMMAND EXECUTED

[17:18:40] ABILIS_CPX_2:d p ip-5

RES:Ip-5 - Not Saved (SAVE CONF) ----------------------------------------------
       - IP over IP (Abilis tunnel) (AIPT) ------------------------------------
       DESCR:
       OPSTATE:UP             LOG:NO               STATE-DETECT:NORMAL
                              FRAG:NO
       IPADD:000.000.000.000  MASK:255.255.255.255   NEIGH:000.000.000.000
       REDIS:YES     HIDE:NO         RP:NONE            IPSEC:NO       VRRP:NO
       NAT:NO                        DIFFSERV:NO        DDNS:NO
       OUTBUF:100    OUTQUEUE:FAIR   MTU:1500
       OUTSPL:NO
       INBUF:0                      mru:1500           SRCV:NO
       - TRFA section ---------------------------------------------------------
       TRFA:NO
       - Link -----------------------------------------------------------------
       LLOG:DS       LMPX:YES         LC:YES         LCOMP:NO      LCR:NO
       LT1:3000      LT3:9000         LN2:3                        LCRKEY:DFT
       - IP Tunnel ------------------------------------------------------------
       TLOG:NO       MODE:EXT         D-TOS:0-N      V-TOS:0-D     C-TOS:0-D
       MPX:NO        RS-BUF:100       D-TOUT:1000    V-TOUT:100    V-RED:NONE
       PATH:DOUBLE   LOCPORT:2105     REMPORT:2100   CR:NO         CRKEY:DFT
       OUT-IP:AUTO
       LOCIPADD:R-ID (192.168.001.254)  REMIPADD:#
       OUT-IP2:AUTO
       LOCIPADD2:R-ID (192.168.001.254) REMIPADD2:#

	Tip
	The parameter `PATH` must be set ad the same value on both the CPX or the VPN will not work.

New parameters are:

OUT-IP2: second output IP resource (AUTO will send the packets to the default gateway specified in IP routing table; it's also possible to specify the ID of the outgoing IP resource).
LOCIPADD2: second IP address that the local Abilis will use as “source address” for the path 2.
REMIPADD2: second IP address of the remote Abilis for the path 2

Configuration of other parameters of both Abilis must mirror each other; see Section 38.3.1, “Abilis IP Tunnel over IP – Extended Mode”.

[17:18:52] ABILIS_CPX_1:s p ip-5 descr:To_Abilis_2 neigh:192.168.1.254 mask:255.255.255.0 nat:inside frag:frf12 fragsize:800 lcr:data
remport:2105 locipadd:217.1.1.1 remipadd:217.2.2.2 locipadd2:80.80.80.80 remipadd2:81.81.81.81 out-ip2:3

COMMAND EXECUTED

[17:33:17] ABILIS_CPX_1:d p ip-5

RES:Ip-5 - Not Saved (SAVE CONF) ----------------------------------------------
       - IP over IP (Abilis tunnel) (AIPT) ------------------------------------
       DESCR:To_Abilis_2
       OPSTATE:UP             LOG:NO               STATE-DETECT:NORMAL
                              FRAG:FRF12             FRAGSIZE:800
       IPADD:000.000.000.000  MASK:255.255.255.000   NEIGH:192.168.001.254
       REDIS:YES     HIDE:NO         RP:NONE            IPSEC:NO       VRRP:NO
       NAT:INSIDE    UPNP:NO         DIFFSERV:NO        DDNS:NO
       OUTBUF:100    OUTQUEUE:FAIR   MTU:1500
       OUTSPL:NO
       INBUF:0                      mru:1500           SRCV:NO
       - TRFA section ---------------------------------------------------------
       TRFA:NO
       - Link -----------------------------------------------------------------
       LLOG:DS       LMPX:YES         LC:YES         LCOMP:NO      LCR:DATA
       LT1:3000      LT3:9000         LN2:3                        LCRKEY:DFT
       - IP Tunnel ------------------------------------------------------------
       TLOG:NO       MODE:EXT         D-TOS:0-N      V-TOS:0-D     C-TOS:0-D
       MPX:NO        RS-BUF:100       D-TOUT:1000    V-TOUT:100    V-RED:NONE
       PATH:DOUBLE   LOCPORT:2105     REMPORT:2105   CR:NO         CRKEY:DFT
       OUT-IP:AUTO
       LOCIPADD:217.001.001.001         REMIPADD:217.002.002.002
       OUT-IP2:3     GW2:#
       LOCIPADD2:080.080.080.080        REMIPADD2:081.081.081.081

[17:18:55] ABILIS_CPX_2:s p ip-5 descr:To_Abilis_1 neigh:192.168.0.254 mask:255.255.255.0 nat:inside frag:frf12 fragsize:800 lcr:data
remport:2105 locipadd:217.2.2.2 remipadd:217.1.1.1 locipadd2:81.81.81.81 remipadd2:80.80.80.80 out-ip2:3

COMMAND EXECUTED

[17:35:08] ABILIS_CPX_2:d p ip-5

RES:Ip-5 - Not Saved (SAVE CONF) ----------------------------------------------
       - IP over IP (Abilis tunnel) (AIPT) ------------------------------------
       DESCR:To_Abilis_1
       OPSTATE:UP             LOG:NO               STATE-DETECT:NORMAL
                              FRAG:FRF12             FRAGSIZE:800
       IPADD:000.000.000.000  MASK:255.255.255.000   NEIGH:192.168.000.254
       REDIS:YES     HIDE:NO         RP:NONE            IPSEC:NO       VRRP:NO
       NAT:INSIDE    UPNP:NO         DIFFSERV:NO        DDNS:NO
       OUTBUF:100    OUTQUEUE:FAIR   MTU:1500
       OUTSPL:NO
       INBUF:0                      mru:1500           SRCV:NO
       - TRFA section ---------------------------------------------------------
       TRFA:NO
       - Link -----------------------------------------------------------------
       LLOG:DS       LMPX:YES         LC:YES         LCOMP:NO      LCR:DATA
       LT1:3000      LT3:9000         LN2:3                        LCRKEY:DFT
       - IP Tunnel ------------------------------------------------------------
       TLOG:NO       MODE:EXT         D-TOS:0-N      V-TOS:0-D     C-TOS:0-D
       MPX:NO        RS-BUF:100       D-TOUT:1000    V-TOUT:100    V-RED:NONE
       PATH:DOUBLE   LOCPORT:2105     REMPORT:2105   CR:NO         CRKEY:DFT
       OUT-IP:AUTO
       LOCIPADD:217.002.002.002         REMIPADD:217.001.001.001
       OUT-IP2:3     GW2:#
       LOCIPADD2:081.081.081.081        REMIPADD2:080.080.080.080

	Tip
	Saving the configuration with save conf command, the validation procedure will automatically change the parameter `MPX` (Multiplexing) from `NO` to `YES`. Also `LMPX` will be changed from `YES` to `EXT`: it can be set to `YES` only for data protocols `LAPB` and `LINK-FR` (this VPN is based on UDP protocol).

	Tip
	Activation of Link Check protocol is recommended (`LC`:`YES`): the parameter must be set at the same value on both Abilis or the VPN will not work.

	Tip
	Encryption of data packets has been activated (`LCR`:`DATA`) and the default Encryption Key has been used (`LCRKEY`:`DFT`). Usage of encryption is useful to increase the security of data transmission.

	Tip
	Fragmentation has been activated (`FRAG`:`FRF12` `FRAGSIZE`:`800`): it's recommended on VPN realized over Internet lines.

[17:33:19] ABILIS_CPX_1:save conf

VALIDATION IN PROGRESS ...
WARNING: RES:IP-5 Changed "LMPX" from YES to EXT
WARNING: RES:IP-5 Changed Abilis IP Tunnel "MPX" from NO to YES, because Link "LMPX" = EXT
VALIDATION SUCCESSFULLY EXECUTED

SAVE EXECUTED

[17:37:31] ABILIS_CPX_1:d p ip-5

RES:Ip-5 - IP over IP (Abilis tunnel) (AIPT) ----------------------------------
       DESCR:To_Abilis_2
       OPSTATE:UP             LOG:NO               STATE-DETECT:NORMAL
                              FRAG:FRF12             FRAGSIZE:800
       IPADD:000.000.000.000  MASK:255.255.255.000   NEIGH:192.168.001.254
       REDIS:YES     HIDE:NO         RP:NONE            IPSEC:NO       VRRP:NO
       NAT:INSIDE    UPNP:NO         DIFFSERV:NO        DDNS:NO
       OUTBUF:100    OUTQUEUE:FAIR   MTU:1500
       OUTSPL:NO
       INBUF:0                      mru:1500           SRCV:NO
       - TRFA section ---------------------------------------------------------
       TRFA:NO
       - Link -----------------------------------------------------------------
       LLOG:DS       LMPX:EXT         LC:YES         LCOMP:NO      LCR:DATA
       LT1:3000      LT3:9000         LN2:3                        LCRKEY:DFT
       - IP Tunnel ------------------------------------------------------------
       TLOG:NO       MODE:EXT         D-TOS:0-N      V-TOS:0-D     C-TOS:0-D
       MPX:YES       RS-BUF:100       D-TOUT:1000    V-TOUT:100    V-RED:NONE
       PATH:DOUBLE   LOCPORT:2105     REMPORT:2105   CR:NO         CRKEY:DFT
       OUT-IP:AUTO
       LOCIPADD:217.001.001.001         REMIPADD:217.002.002.002
       OUT-IP2:3     GW2:#
       LOCIPADD2:080.080.080.080        REMIPADD2:081.081.081.081

[17:35:10] ABILIS_CPX_2:save conf

VALIDATION IN PROGRESS ...
WARNING: RES:IP-5 Changed "LMPX" from YES to EXT
WARNING: RES:IP-5 Changed Abilis IP Tunnel "MPX" from NO to YES, because Link "LMPX" = EXT
VALIDATION SUCCESSFULLY EXECUTED

SAVE EXECUTED

[17:44:27] ABILIS_CPX_2:d p ip-5

RES:Ip-5 - IP over IP (Abilis tunnel) (AIPT) ----------------------------------
       DESCR:To_Abilis_1
       OPSTATE:UP             LOG:NO               STATE-DETECT:NORMAL
                              FRAG:FRF12             FRAGSIZE:800
       IPADD:000.000.000.000  MASK:255.255.255.000   NEIGH:192.168.000.254
       REDIS:YES     HIDE:NO         RP:NONE            IPSEC:NO       VRRP:NO
       NAT:INSIDE    UPNP:NO         DIFFSERV:NO        DDNS:NO
       OUTBUF:100    OUTQUEUE:FAIR   MTU:1500
       OUTSPL:NO
       INBUF:0                      mru:1500           SRCV:NO
       - TRFA section ---------------------------------------------------------
       TRFA:NO
       - Link -----------------------------------------------------------------
       LLOG:DS       LMPX:EXT         LC:YES         LCOMP:NO      LCR:DATA
       LT1:3000      LT3:9000         LN2:3                        LCRKEY:DFT
       - IP Tunnel ------------------------------------------------------------
       TLOG:NO       MODE:EXT         D-TOS:0-N      V-TOS:0-D     C-TOS:0-D
       MPX:YES       RS-BUF:100       D-TOUT:1000    V-TOUT:100    V-RED:NONE
       PATH:DOUBLE   LOCPORT:2105     REMPORT:2105   CR:NO         CRKEY:DFT
       OUT-IP:AUTO
       LOCIPADD:217.002.002.002         REMIPADD:217.001.001.001
       OUT-IP2:3     GW2:#
       LOCIPADD2:081.081.081.081        REMIPADD2:080.080.080.080

Now the configuration of the VPN is completed.

Tip

Interesting chapters:

Section 68.13.4, “How to configure a VPN tunnel with the “double path” option”;

Section 20.3, “IP Resources”.


38.2. Configuring Packet Voice tunnels		38.4. Tunneling diagnostics and statistics