MAC Flapping on Catalyst 9200

[JHarpole]

I have a Cisco 9200 that is getting constant MAC FLAP errors. This is between Gi6/0/48 and Gi7/0/48. Now I know what they are connected to, we have a SD-WAN configured back to our head office, there is a primary and backup router that use two different connections. The two routers are configured as a hot failover and share an IP and MAC address. So, I know this is why I am getting this error. My question is there a best practice on how the two ports should be configured for an instance like this so I am not getting the flapping?

Thank you,

[Mark Elsen]

           - If these MAC addresses are random .  you could have a network loop

 M.

[MHM Cisco World]

If both sdwan use same subnet you can use vrrp and hence you not need any more use same IP/Mac for both SDWAN

If you already use vrrp 

Check vrrp status in both sdwan routers

MHM

[Deepak Kumar]

You might need HSRP or VRRP configuration for your routers. However, I would like to see some kind of diagrams before fully suggestions. 

Regards,

Deepak Kumar

[paul driver]

Hello
not unless those two rtrs lan interfaces are set up for fhrp and are for some reason transitioning (preempt) between each other.

Assumption here is that these rtrs are using a fhrp and your switch is a transit path
are those ports showing any errors?
are any of the mac addresses that are flapping correspond to any of the below:
0000.0c7
0000.7xx
0000.5e