04-11-2014 05:10 PM - edited 03-07-2019 07:04 PM
Hi,
Not quite sure what to make of this.
We have a couple of esx servers that have one 10G nic in Nex1 and a second in Nex 2. The links are not port channeled. The two nexus switches are linked by two 10g connections channeld and vpc'ed . Each nexus has two 1G connections Po'ed to a 3750 (our main access switch).
When we shut down one nexus all is good. No loss of connectivity, maybe a little blip but for the most part all is good.
When we bring up the shutdown nexus we are good UNTIL the nex actually comes on line. Then all the nodes lose connectivity for about 30-60 seconds.
The only thing we see in the logs is this.. last 9 seconds (as opposed to 30-60) but the timing is similar. (eth1/47 is one of the interswitch trunks)
%ETHPORT-5-IF_UP: Interface Ethernet1/47 is up in mode trunk
%ETHPORT-3-IF_ERROR_VLANS_SUSPENDED: VLANs 1,34 on Interface port-channel5 are being suspended. (Reason: vPC
peer is not reachable over cfs)
and 9 seconds later they are unsupended
ERROR_VLANS_REMOVED: VLANs 1,34 on Interface port-channel5 are removed from suspended state.
I dont know if this is normal but it would be nice if we could have two switches for HA .
Thoughts?
Thanks
04-11-2014 08:38 PM
Sounds like you had a peer link failure during the test.
I suggest that you configure auto-recovery on both your vPC peers then re-test.
See below a config example:
http://www.cisco.com/c/en/us/support/docs/switches/nexus-7000-series-switches/116187-configure-vpc-00.html
04-12-2014 05:27 AM
Thanks Sean
I had enabled auto-recoverey on both switches yesterday but no luck.
The odd thing is (and I tested again). If I reboot switch 2 and ping one of the host AND ping switch 2 I see host is up and switch down (normall). The second switch 2 starts replying to pings the host goes offline for about a minute. It is like switch one is saying "OH, my VPC peer is back, I am going to shut down my ports and wait until the all the vpc's are up"
04-12-2014 05:37 AM
NOTE: We see the same behavior regardless of which switch is restarted. I am wondering if this is related to role priority? Stumped :(
03-27-2019 03:59 AM
Hi Andrew,
Did you get this resolved? I am seeing the same issue with our customer. Primary is powered off, a few pings are missed. Primary is powered back on and we miss 20-30 pings during the bootup. I did see the traffic switch back to VPC port channel, but HSRP did not fail back at the same time.
Auto recovery is not enabled in this setup.
03-27-2019 04:18 AM
03-27-2019 04:26 AM
03-27-2019 04:32 AM
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