65.10. How to configure the speedlimit

Speedlimit is a feature that allows IPRTR to reduce the rate of its outgoing datagrams on a specific IP resource. Main usage is to reduce speed to safe values in presence of VOICE packets, while leaving full speed to data transfers when voice is not present.

The speedlimit can be activated setting the OUTSPL parameter to YES in the IP resources. The maximum speed is set in the OUTSP parameter. Generally this parameter must be set to a value slightly lower than the maximum speed in upload of the ADSL/HDSL line (e.g.: if the ADSL line has a maximum speed of 256 Kbit/s the OUTSP parameter must be set to 240).

Enter into the Abilis control-program or open the configuration file with the Console configurator and type the following commands.

s p ip-3 outspl:yes outsp:240Activate the Output Speedlimit and configure the speed limitation value.
s p iprtr acl:ext cos:enabled cosbalance:yesConfigure the Access List activation mode to EXT, enable the Class-Of-Service management and the Class-Of-Service Balancing.
a ipacl pr:0 type:permit ipcos:high tos-in:*-d prot:udp sip:int sa:* da:* spo:* dpo:*Add the standard IPACL that assigns high priority to voice packets.
save confSave the configuration.

On a working Abilis, you must initialize the IP-3 (init res:ip-3) and the IPRTR resources (init res:iprtr). The changes on IPACL table are immediately active.