ACI Multipod IPN without mesh topology

[shawnkarthick]

We have an existing ACI multi-pod with two pod's, POD-1 & POD-2 are interconnected through IPN network. And there is a requirement to add new location as POD-3. 

• POD-3 IPN will have only dark fiber to POD-1 IPN
• Here, IPN network will not be in fully-mesh topology
• Is the above one is supported topology?

Thanks

[Sergiu.Daniluk]

Hi @shawnkarthick 

As long as the routing table in the IPN is reaching all spines from all pods, then it is supported.

Take care,

Sergiu

[Robert Burns · Accepted solution]

There's still full peering between all Pods, even if it's a hub topology rather than full mesh.   Just means if Pod1 fails, then the other two Pods will be unable to communicate (not a best practice).  If possible should try to have a dedicated IPN each site can link into so this doesn't happen.

Regards,
Robert

[shawnkarthick]

Thanks Robert & Sergiu, for your inputs !!!!

Considering the failure scenario, we are planning for the dedicated IPN network on POD-3. POD-3 to POD-1 it's goanna be DWDM link and POD-3 to POD-2 will be through MPLS connectivity.

Can you redirect me to cisco docs, in case you guys have come across on 3 node service layer clustering (both FW/LB, active/active) one in each pod.

Thanks

Karthick