Border Leaf - Anycast gateway ?

[Rajagopal Sivaramakrishnan]

Hi All

We have VXLAN EVPN network, and is integrating with the old datacenter using OTV.  All the leaf switches run anycast gateways, which is fine..  Border leaf connects to the OTV router (N7K VDC), and also has the anycast gateway configured.. The gateway MAC address leaks through OTV to the old datacenter, and there are dup mac/arps detected .. Some VMs changed their default gateways ARPs to the anycast gateway, and traverse from old dc to the new dc for DGW.  ARP filters have been applied, and it looks ot be stable, but there are random ARP issues still...

Do you guys think anycast gateways are needed in border leafs ? will removing that fix this issue ? Any help appreciated..

[Rajagopal Sivaramakrishnan]

any help?

[dwillie · Accepted solution]

Just came across this while searching another issue with Anycast Gateways, you've probably already fixed this, but I would assume you could add the anycast gateway mac-address to the mac address filter applied to the OTV interfaces, like the hsrp mac address filtering you would normally do.  This way the gateway macs are dedicated to their respective datacenter.