i need to do EPLD upgrade. on a couple of Nexus 7000 with only 1 10Gb card per Switch and 2 peer-link on this card. Can you tell me what's hapening when the 10GB card on the vpc secondary role Switch will be EPLD upgraded.
I got your message but not able to find it here in the forum.
thanks for the link. vpc tracking is not configured. i don't use Layer3 features with the Nexus. Can i use vpc tracking only with vpc peer link and the management address (vlan interface).
I don't think using tracking on management interface will work (I have not done it this way before). One way I know it will work is you can isolate one switch at a time (meaning shut all its port to isolate it) and upgrade EPLD via console. The other way to do is you can change the vpc priority and force a switch to become vPC secondary.
I don't think this will work since your switch is up and vPC peer-keepalive is active.
Let's assume you are able to change the vPC role on one switch, but how is the remote switch able to detect it?
The only solution is really to create a dual-active scenario (shut down vpc peer-link and vpc keepalive link at the same time) and also shut down vpc southbound connection to avoid blackholing traffic.
EPLD upgrade procedure upgrades drivers on linecards and this process is disruptive for transit traffic.
VPC has built-in mechanism which avoids double-head scenario which blocks vpc links on secondary device.
The only proper recomendation in the case with one 10Gig linecard - is removing all important traffic from switch on which you will perform EPLD upgrade. For example changing the primary/slave roles on the devices.
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