L3 Routing For Specific Subnets Between two OTV Sites

[Atasawar1]

We have two data centers connected with only OTV link. All the network traffic flowing (extended vlans) are passing through OTV. We need to make L3 routing for few subnets which are configured on aggregation switches on both sites. How can we achieve this ? Can we create a separate L3 connectivity by use the same OTV link. 

[Sergiu.Daniluk]

Hi @Atasawar1 

If I understand correctly you want to configure routing in both sites for the vlans which are extended. Is this accurate?

If yes, then what you are looking for is FHRP Isolation:

https://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Data_Center/DCI/whitepaper/DCI3_OTV_Intro/DCI_1.html#wp1220161 

Basically, you configure the FHRP of your choice in each site, and you configure the OTV VDCs to filter out the VMAC advertisement and ARP/FHRP control packets.

Stay safe,

Sergiu