4 router HSRP over double sided VPC

[Beazle]

We are looking into implementing a double sided VPC with each of the 4 devices (N9k) participating in HSRP. 

DC1-A will be VPC peers with DC1-B

and 

DC2-A will be VPC peers with DC2-B

There will be a double sided VPC between DC1 and DC2

All 4 will be part of the same HSRP group. 

Does DC1-A need to L3 peer with DC2-A? 

All gateways will sit on these 9ks as the L2/ L3 boundary. Our Firewalls are transparent and will connect to DC1-A and DC2-A. Everything should just L2 bridge to the active HSRP router, but wasnt sure if there would be a case in which we would still need to L3 peer between DCs.

Appreciate any help!

[MHM Cisco World]

Cisco
https://www.cisco.com › designPDF
Best Practices for Virtual Port Channels (vPC)

Within this guide there is some point must consider when config hsrp in double sided 

MHM

[balaji.bandi]

Depends on use case, for HSRP that should work since all you layer 2 are extended and that is the requirement for the HSRP for active/standby/member/member.

this is suggestion based on your question.

i am sure you may have arp synchrnisation configured on the VPC.