Saturday, March 17, 2018

Arista - MLAG + OSPF?

I've got a pair of Arista switches in MLAG that I'm going to turn into our L3 core. Anyone know the best approach for doing OSPF? Do I involve the peer (MLAG) link? Do I put both switches and the upstream firewall in the same /29? Each switch in it's own /30 to the firewall?

I've done some quick labbing with VMs, and it seems like if everything is in the same /29 you can run into situations where one switch will bounce through the other to hit the firewall.



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