| 76.3. ADSL/HDSL lines | ||
|---|---|---|
 | Chapter 76. FAQ - Frequently Asked Questions |  |
| 76.3. ADSL/HDSL lines | ||
|---|---|---|
| | Chapter 76. FAQ - Frequently Asked Questions | |
Verify the state of the USB modem: “USB” and “ADSL” LEDs must be green and continuous (not blinking!).
![[Warning]](../images/warning.png) | Warning |
|---|---|
“ADSL” LED is green and continuous even if the logical layer is down. |
| Warning |
|---|---|
When “USB” LED is red, the USB connection isn't active! |
Type the d d adsl command and verify that:
The modem is connected and correctly working: MODEM-STATE:CONNECTED;
ADSL carrier is active: LINE-STATE:UP;
There is traffic on the line: Trh-OUT and Trh-IN columns with values different from zero and increasing over time.
For example:
[10:08:48] ABILIS_CPX:d d dsl
RES:Dsl-1 ---------------------------------------------------------------------
Linea ADSL
LINE-STATE:UP LINE-MODE:ADSL ADSL-ANNEX:A
MODEM-STATE:CONNECTED MODEM-FAILURE:NONE
MODEM-NAME:Abilis-ADSL2+ MODEM-MAC:00-0F-C9-14-7A-CF FW:3.18
----------|---INPUT---|--OUTPUT---|------------|---INPUT---|--OUTPUT---|
SPEED | 8.128 M| 0.829 M|ATTENUATION | 20.8| 18.8|
SN-MARGIN | 18.7| 18.7|INTERLEAVE | 0.25| 0.25|
- ATM level diagnostics ------------------------------------------------
VPI VCI QoS State Bw-In Bw-Out 5sec-Thr-In 5sec-Thr-Out
5min-Thr-In 5min-Thr-Out
------------------------------------------------------------------------
8 35 NORMAL UP 7.361 M 0.751 M 15.4 K 8.14 K
235 K 29.0 K
------------------------------------------------------------------------It's possible to restart the USB modem, using the command debug res:dsl-1 lsn:254. By typing the command debug res:dsl-1 lsn:0, it's possible to display all available debug commands.
[10:08:48] ABILIS_CPX:debug res:dsl-1 lsn:254
RES:Dsl-1 --------------------------------------------------------------------
BufferLength:57 Date/Time:18/01/2017 12:37:50 TraceTime:<NotRunning>
DSL restart has been queued, it will be executed ASAP.Verify the state of DCE3 modem: if alarm LEDs (Alarm, KO, etc) are on and blinking, there can be a fault on public network.
Type the d de fr command and verify that:
LMI state is active: STATE:LMI-UP;
DLCI state is active: DLCI STATE: ACT;
There is traffic on the line: Trh-OUT and Trh-IN columns with values different from zero and increasing over time.
For example:
[10:41:37] ABILIS_CPX:d de fr-1
RES:Fr-1 - FR over Dedicated Line (DL) ----------------------------------------
- Frame Relay ----------------------------------------------------------
STATE:LMI-UP
DLCI State Cong MaxThr CurMaxThr 5sec-Thr-Out 5sec-Thr-In
Cir Bc StepConst MaxThr% 5min-Thr-Out 5min-Thr-In
Tc Be Step Cir% MaxFrame-Out MaxFrame-In
------------------------------------------------------------------------
20 ACT NO 256000 256000 37488 51392
256000 256000 4 100% 52968 51976
1.000 0 5 100% 1504 1504
------------------------------------------------------------------------
- Link -----------------------------------------------------------------
+--------+--- Global ----+------- P-Link -------+------- S-Link -------+
| STATE: | READY | READY | LINK-NOT-PRESENT |
+--------+---------------+----------------------+----------------------+If an ADSL/HDSL line is too slow, you have to do the following verifications.
Verify that the ERRORS parameter in the
ADSL resource isn't increasing over time.
[10:08:48] ABILIS_CPX:d s dsl
RES:Dsl-1 ---------------------------------------------------------------------
Linea ADSL
--- Cleared 3 days 20:47:27 ago, on 13/01/2017 at 19:29:45 -------------
-----------|---INPUT---|--OUTPUT---|-----------|---INPUT---|--OUTPUT---|
LINE-DOWN | 0| |MODEM-DISC | 0| |
LINE-UP | 1| |MODEM-CONN | 1| |
AUTORST-L | 0| |MANUALRST | 0| |
AUTORST-U | 0| |
------------------------------------------------------------------------
- ATM level statistics -------------------------------------------------
-----------|---INPUT---|--OUTPUT---|-----------|---INPUT---|--OUTPUT---|
VC-UNKNOWN | 0| |HEC-ERR | 0| |
AAL5-ERR | 0| 0|MISALIGNED | 0| |
DROPPED | 0| 0|
------------------------------------------------------------------------
VPI:8 VCI:35
-----------|---INPUT---|--OUTPUT---|-----------|---INPUT---|--OUTPUT---|
AAL5-SDU | 4572016| 4375998|AAL5-CHAR | 2084385512| 553960360|
ERRORS | 46435| 0|CELLS | 46435278| 13655724|
------------------------------------------------------------------------Verify the bandwidth occupation with the d d dsl command.
[10:08:48] ABILIS_CPX:d d dsl
RES:Dsl-1 ---------------------------------------------------------------------
Linea ADSL
LINE-STATE:UP LINE-MODE:ADSL ADSL-ANNEX:A
MODEM-STATE:CONNECTED MODEM-FAILURE:NONE
MODEM-NAME:Abilis-ADSL2+ MODEM-MAC:00-26-75-F0-17-BA FW:3.18
----------|---INPUT---|--OUTPUT---|------------|---INPUT---|--OUTPUT---|
SPEED | 11.616 M| 1.165 M|ATTENUATION | 18.4| 8.2|
SN-MARGIN | 11.9| 7.3|INTERLEAVE | 0.25| 0.25|
- ATM level diagnostics ------------------------------------------------
VPI VCI QoS State Bw-In Bw-Out 5sec-Thr-In 5sec-Thr-Out
5min-Thr-In 5min-Thr-Out
------------------------------------------------------------------------
8 35 NORMAL UP 10.520 M 1.055 M 20.9 K 28.7 K
20.9 K 27.6 K
------------------------------------------------------------------------If the input and/or output throughput has a value near to the maximum Bandwidth available, the line is saturated.
With the d nat maps command it's possible to display the IP addresses and ports of the current NAT sessions.
[12:48:33] ABILIS_CPX:d nat maps
Number of records in standard table: 4
S A TYPE SRC-ADDRESS SP/ID DST-ADDRESS DP/ID ALS-ADDRESS ALIAS TM
-------------------------------------------------------------------------------
I S UDP 192.168.000.008 45379 128.006.229.020 57333 080.080.080.080 7668 164
I S TCP 192.168.000.008 1521 193.205.079.111 5542 080.080.080.080 52450 132
I S UDP 192.168.000.008 45379 140.078.149.003 31782 080.080.080.080 7630 70
I S FTPd 192.168.000.003 4551 212.029.147.233 20 080.080.080.080 7455 172
I S UDP 192.168.000.008 45379 143.225.070.229 35236 080.080.080.080 7631 70
I S UDP 192.168.000.008 45379 221.250.120.075 42197 080.080.080.080 7659 136
I S UDP 192.168.000.008 45379 069.246.011.036 32876 080.080.080.080 7645 104
...In this case there is a FTP session that could use a lot of bandwidth.
Verify the number of current NAT sessions with the d d nat command.
[12:48:33] ABILIS_CPX:d d nat
RES:Nat -----------------------------------------------------------------------
Network_Address_Translator
STATE:READY
-----------|--- CUR ---|-- PEAK ---|--- MAX ---|
LINKS | 998| 1000| 1000|
------------------------------------------------If the value of CUR (current) parameter is near
to the value of MAX parameter, probably some sessions
could be discarded.
![[Tip]](../images/tip.png) | Tip |
|---|---|
Remember to check also the IPACL table. |
| |  | |
| 76.2. POTS ports |  | 76.4. CTI system |