List, I've been trying to determine if c6500 pfc2/3 and msfc2/3 support something like transmission priority for control-plane generated protocols (layer2 and 3 control protocols, that is -- lldp, ospf, isis, bgp, rsvp, stp, cdp, etc). I've read over this:
"Egress LAN Port Scheduling.." http://www.cisco.com/en/US/docs/routers/7600/ios/12.2SXF/configuration/guide/qos.html#wp1698086 ...and can observe that, at least for switchports set to 'mode trunk,' packets from the msfc2 or 3 are emitted with CoS 6 and 7 set, on packets that are clearly OSPF and PIM hellos. My assumption is that I can simply map CoS to queues (prio or regular) and assign a drop threshold like I normally do, but is this a safe assumption? 2nd question: is there already some "unconditional priority" queue hidden from MLS or the MQC configuration which is uses to transmit control-plane sourced messages? My recollection was that on sonet and various other lower-speed serial lines, things like PPP LCP packets were unconditionally transmitted head-of-line by whatever control plane was handling the port, ie. rsp4, 2800, 7200, etc. Best, -Tk _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
