we have 2 FlexPod (DC1 and DC2) with two Nexus 5548 on each side. We connected each Nexus on DC1 with the one on DC2 with 2 ports (Ethernet 1/21,1/22) in the port-channel 15. All worked fine until the day one SFP module was broken and we changed it. After a few minutes we noticed that a few Esxi hosts weren't connected anymore. A "show interface ethernet 1/22" showed the state "Link not connected", the "show port-channel sum" showed this:
15 Po15(SU) Eth LACP Eth1/21(P) Eth1/22(D)
I also noticed a syslog:
2013 Jul 22 12:10:36 mez: %ETH_PORT_CHANNEL-4-PORT_INDIVIDUAL: port Ethernet1/22 is operationally individual
After a few minutes the port-channel was fully up again and we could the Esxi hosts. Shutting down the ports and "no shutdown" them didn't work either.
But a few minutes later the old problem came up.
Now it changes between these two states every 15 minutes. I think it is a problem with the lacp channel, but the config seems fine. I hope you can help me - if you need any further information, just ask!
Could you share the output of show lacp counters interface port-channel15?
If we would be seeing a lot of difference in the RX and TX of LACPDU's we can assume 3 things, either we're not receiving them and we have a link problem, they're getting dropped in the path towards the CPU by copp or rate-limiting on the asic or the CPU has not enough time to process them because we have another high priority process consuming cpu cycles.
We are pleased to announce availability of Beta software for 16.6.3.
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