As it appears the F2E line cards are terrible at dequeuing packets quick enough across a port-channeled application. There was an incident where traffic got pinned to one link from the same source/destination causing input discards due to back pressure from VoQ drops/congestion on some port-channel egress ports. The issue went away on its own and correlated to a sudden increase in traffic (sessions per second) between a single source and destination. All ingress and egress ports are port-channeled with at least two members in them.
Looking at the F3 line cards they have about 7k more egress queue per port and double the amount of egress queue per SOC (512k vs 256k). Granted the F3 lines are a huge cost increase would they be an appropriate upgrade to handle this type of burst traffic? I see the Nexus 7k platform has M3 line cards which cost 3x-4x F3 line cards. What is typically used in data center environments these days in Nexus 7k switches that handle voice applications and such? _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
