Hi All, I have access to some Cisco 7206VXRs with NPE-G1s running image c7200-adventerprisek9-mz.122-33.SRE9.bin. These are LNSs for an ISP terminating DSL connections as PPP sessions over an L2TP tunnel.
I would like to deploy QoS on this LNS towards the subscribers as the ISP is providing VoIP services, so I'd like to prioritise traffic from the ISP VoIP subnet towards the subscribers. I have read the following pages; http://www.cisco.com/en/US/docs/ios/12_2sb/feature/guide/sbsbpssq.html http://www.gossamer-threads.com/lists/cisco/bba/116104 http://doccieshavespecialpowers.wordpress.com/2009/10/14/virtual-access-service-policy/ It looks very simple, thus I assume I have miss-understood something :) I create a simple policy on the LNS as follows; ! class-map match-all CM-VOIP-INFRA match access-group 100 ! policy-map PM-Shape-DSL class class-default ! Shape an ADSL1 connection to 800Kbps shape average 800000 service-policy PM-Prio-VOIP ! policy-map PM-Prio-VOIP class CM-VOIP-Traffic ! Guarantee 200Kbps for voice bandwidth 200 ! access-list 100 remark ACL-VOIP-INFRA access-list 100 permit ip 10.0.0.0 0.0.0.255 any Then I simply apply it with an AV pair on the user's RADIUS account, as follows; cisco-avpair = "sub-qos-policy-out=PM-Shape-DSL" Is it really that basic? In the example above I have shaped the connection to 800k. In real life though all the DSL circuits are sync'ing at different rates of course, which the LNS knows about (I guess the RADIUS server passes this back to the LNS, or does it come straight from the LAC of the wholesale DSL provider?); Picking a random DSL PPP session on the LNS: LNS#show int virtual-access 11 | i BW MTU 1500 bytes, BW 7616 Kbit/sec, DLY 100000 usec, Checking from that CPE: CPE#show dsl int atm0/0/0 | i Speed Speed (kbps): 7616 0 960 0 So, how can I (can it be done at all?) set the shape average bandwidth in the LNS parent policy to be the circuit speed provided to the LNS, because that will always be varying? Many thanks for your time and help. Kind regards, James. _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
