ACI L3Out with VSS – Can L3 Port-Channel Connect to Both VSS Members?

[muhammad-nouman]

We are in the process of implementing new Cisco Catalyst 9600 switches in a VSS (Virtual Switching System) setup as our new core. We plan to connect these to our existing ACI fabric using an L3 port-channel.

Our plan is to configure a Layer 3 port-channel from the ACI leaf switch and associate it with an existing L3Out.

My question is:
Is it supported to configure the L3 port-channel with one link going to each VSS member switch (i.e., dual-homing to both VSS members), or do both links in the port-channel need to terminate on the same VSS member?

Appreciate any guidance or best practices for this kind of integration.

[AshSe · Accepted solution]

Hi @muhammad-nouman 

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@muhammad-nouman wrote:

My question is:
Is it supported to configure the L3 port-channel with one link going to each VSS member switch (i.e., dual-homing to both VSS members), or do both links in the port-channel need to terminate on the same VSS member?

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Yes, it is supported and, in fact, recommended to configure the L3 port-channel with one link going to each VSS member switch. This provides redundancy and maximizes bandwidth utilization.

Please consider the following for the purpose of this configuration:

1. L3Out Configuration

2. Port-Channel Configuration

3. VSS Configuration: 

4. Routing Protocol

Hope This Helps!!!

AshSe

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