Hi all,
I was wondering about the correct approach to update a vPC pair of 3172TQ switches from a 6.x to a 7.x version.
According to the 7.x software release notes we can go directly from 6.x to 7.x without a intermediate step.
So I copied the .bin file to the bootflash of both switches, checked the file with "sh incompatibility" and "sh install all impact".
With the "sh install all impact" I get an "SRG file error" but accroding to some other posts it seems to be a known issue.
Then I started the installation process on the primary with "install all nxos file_name.bin".
The vPC partner was reachable and accessable all the time and the ports the cluster is connected to were UP/UP all the time too(on the secondary), but the cluster was not reachable anymore. Only after the primary came back up and was reloaded a second time, then the cluster was reachable again.
After I started the update on the primary, it went through the various steps and reloaded. A couple of minutes later, even though the switch was not pingable yet, the vPC formed and I could see the primary from the secondary via CDP.
I took the primary about 40 minutes to become reachable again.
So my questions are:
Any idea why the cluster was not reachable anymore even though the secondary looked alright?
Did I do something wrong? Do I need to use another command?
And another question is, does traffic usually run via the vpc-peer-link? I noticed that the two uplink ports on the primary are blocked and the peer-link ports are in FWD state.
Thanks for any help!
