06-23-2015 05:34 AM - edited 03-01-2019 04:50 AM
Hello,
I'm trying to create a vPC using two FEXes instead of LEAFs. The GUI steps are pretty obvious when creating a vPC with two LEAFs, but using two FEXes it's not as clear.
Been trying to Google a quickstep guide, but I can't find anything so I'll try my luck here instead.
Best regards,
Johan Kalén
Solved! Go to Solution.
06-23-2015 05:40 AM
Hello
With ACI and the n9k in ACI mode, the only supported configuration for FEX is straight through from the leafs. using two leafs and two fex in this topology, a host can vPC attach to two FEXes in vPC host mode.
its a new feature in 1.1(1j) code, i will try to find documentation on this feature and reply to this post.
Hope this helps!
06-23-2015 05:40 AM
Hello
With ACI and the n9k in ACI mode, the only supported configuration for FEX is straight through from the leafs. using two leafs and two fex in this topology, a host can vPC attach to two FEXes in vPC host mode.
its a new feature in 1.1(1j) code, i will try to find documentation on this feature and reply to this post.
Hope this helps!
06-23-2015 06:37 AM
Great!
Yeah, the two FEXes are connected to two leafs in the backend. It's a Cisco WLC, so I'll double check for LACP compatibility too.
Thanks!
07-08-2015 01:16 AM
Hi DPITA,
Are there any limit when using vPC on FEX ?
07-08-2015 12:57 PM
Hello!
Yes there is a limit, like all good things in life =)
Physically, I believe only 8 per leaf and 120 per fabric. Number of vPC is 320 in total i believe, don't think it is specific to FEX or not but definitely counts. Here is the link for the scalability guide for version 1j
http://www.cisco.com/c/en/us/td/docs/switches/datacenter/aci/apic/sw/1-x/verified-scalability/b_Verified_Scalability_BRelease.html#reference_D442EE55E7DD48099E5850CCF282C7F3
Hope that helps!
07-08-2015 07:40 PM
Hi DPITA,
Some information from your link :
FEX VPC | |||
Maximum EPGs behind FEX VPC port | 20 | N/A |
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