02-20-2015 01:04 PM - edited 03-07-2019 10:46 PM
Hi
I have set up 2 x 6800x switches as a VSS pair. I also have a separate link for Dual Active Detection. When I break the VSL, One of the switches go into recovery mode, when I restore the VSL, the switch stays in recovery mode unless I manually reload it.
Should this switch not reload automatically once the VSL is restored. I am using IOS c6880x-adventerprisek9-mz.SPA.151-2.SY4a.bin
I have previously setup VSS on a pair of 4500x switches and I know the switches in recovery mode reloaded itself once the VSL is restored.
Thanks
Solved! Go to Solution.
02-21-2015 12:52 PM
The 6800 should work the same way as the 4500x series.
You may want to run a few more tests and if the behavior is the same contact Cisco TAC.
Here is the explanation from the VSS document
An active chassis that detects a dual-active condition shuts down all of its non-VSL interfaces (except interfaces configured to be excluded from shutdown) to remove itself from the network, and waits in recovery mode until the VSL links have recovered. You might need to physically repair the VSL failure. When the shut down chassis detects that VSL is operational again, the chassis reloads and returns to service as the standby chassis.
Link:
http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/15-1SY/config_guide/sup2T/15_1_sy_swcg_2T/virtual_switching_systems.html
also, can you provide the output of
sh switch virtual dual-active fast-hello
HTH
02-20-2015 01:23 PM
Hi,
How are you breaking the VSL links?
Are you pulling out the cables or shutting down the Portchannel interface?
Thanks,
02-20-2015 03:34 PM
Hi Reza
I am pulling out the cables.
02-21-2015 08:48 AM
Hi,
Ok, if you pull out the cables and put them back in, the switch in recovery mode should reboot on its own. Now, if you shut the Portchannel interface and bring it back up, after no shutting the interface and saving the config, you have to reboot the switch in recovery mode manually. The switch will than come back up as stand-by.
We tested this on the 4500x series but don't have any 6800 to test with.
HTH
02-21-2015 11:34 AM
Yes I setup some 4500x switches a few weeks ago and the recovery switch reloaded itself as soon as the links were restored. Im not getting the same result with some 6800x switches, I am having to reload the recovery switch manually
02-21-2015 12:52 PM
The 6800 should work the same way as the 4500x series.
You may want to run a few more tests and if the behavior is the same contact Cisco TAC.
Here is the explanation from the VSS document
An active chassis that detects a dual-active condition shuts down all of its non-VSL interfaces (except interfaces configured to be excluded from shutdown) to remove itself from the network, and waits in recovery mode until the VSL links have recovered. You might need to physically repair the VSL failure. When the shut down chassis detects that VSL is operational again, the chassis reloads and returns to service as the standby chassis.
Link:
http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/15-1SY/config_guide/sup2T/15_1_sy_swcg_2T/virtual_switching_systems.html
also, can you provide the output of
sh switch virtual dual-active fast-hello
HTH
02-21-2015 01:12 PM
Thanks Reza I had a read through that document so I may just contact Cisco TAC and see what they say. Im not near the switch until next week now so may also try a few other things.
Thanks for your help
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