Nexus 5500 and 3000 also support Double-Sided vPC with 32-Way Port-Channel ?

[jimmy.wucy]

Hi Everybody :

I need conformance this solution is work for nexus 5596T and nexus 3172TQ.

Have someone can help us?

I have see  N7K best practices for vPC design guide.
https://www.cisco.com/c/dam/en/us/td/docs/switches/datacenter/sw/design/vpc_design/vpc_best_practices_design_guide.pdf

In n7k and n5k support "Double-Sided vPC with 32-Way Port-Channel".

I have a case, the Core Switch is Nexus 5596T,  and now we want buy a server farm switch is Nexus 3172TQ.
We want use the Double-Sided solution, but only see document say

"When you configure the EtherChannels in a vPC—including the vPC peer link channel—each switch can have up to 16 active links in a single EtherChannel. When you configure a vPC on a Fabric Extender, only one port is allowed in an EtherChannel."

Cisco Nexus 5500 Series NX-OS Interfaces Configuration Guide, Release 6.x - Configuring Virtual Port Channels [Cisco Ne…

cheers

jimmy

[rogupta2]

Hi Jimmy,

Nexus 7k, 5k, 3k all support VPCs as we all know.

I have seen VPCs mostly between 7k&5k, 5k&2k. However, I could not find any Cisco doc which talks about Nexus 5k and 3k in VPC.

To answer your question, there is no document which confirms if Nexus 5k to 3k can offer double sided VPC.

As per the doc Cisco Nexus 5500 Series NX-OS Interfaces Configuration Guide, Release 6.x - Configuring Virtual Port Channels [Cisco Ne…

Cisco Nexus 3000 Series NX-OS Layer 2 Switching Configuration Guide, Release 5.0(3)U2(1) - Configuring Virtual Port Chan…

Each switch can have up to 16 active links in a single EtherChannel. so, a single side VPC should be able to support 16 active links.

Supposing, this architecture supports double-sided vpc, it should also allow us to have 32-way port channel. As of now, it is believed to be available only with Nexus 7k.

Hope this helps, Let me know your thoughts.

Thanks,

Rohit

[ปลาวาฬทราย RMUTT CPE IX]

This is my result:

1. The services are down.
2. N5k: vPC role: secondary, operational primary.
3. N3k: vPC role: none established.
4. Then the N3k hits the loop with high CPU process. :-D

Thank you very much.