Can't ping vPC'd Nexus 3Ks

[mt67]

Hello and thanks for any help with this!

I have 2 Nexus 3Ks (N3K01/N3K02) that I have just figured out how to vPC together (vPC keepalive using 2x10gb per switch LACP port-channeled/vPC peer link using 2x40gb per switch LACP port-channeled). All type-1 and 2 compatibility issues have been cleared up; show vpc looks good. I configured an LACP port-channeled trunk link (2x1gb) to a 6509. All ports are participating, link is up. The vPC peer link and the trunk link are currently allowing all vlans.

For remote management purposes, I have IP'd each N3K's int vlan1 with 192.168.10.1/24 and 192.168.10.2/24 (not really, just illustration here...) The 6509's vlan1 IP is 192.168.10.3/24 and there is a PC connected to the 6509 whose IP is 192.168.10.4/24.

It seems like I'm missing something very simple here, but I can't even ping either N3K switch from the PC (let alone remotely manage them...)

Thanks again for any assistance with this!

MT

[Reza Sharifi]

Can you post configs from both 3ks and the 6500?

HTH

[mt67 · Accepted solution]

I figured it out. STP was blocking on the 6509 side. I had 'spanning-tree portfast network' set on the trunk link which was causing bridge assurance inconsistencies. Removing that command from the trunk port channel fixed the problem.

I really need to get up to speed on STP...