Can the MLAG ISL bundled ports between two Summit 670Vs also be used for data traffic?

[Jim_Keeffe]

I have a BD8810 connected via MLAG (ports 5:1 & 6:1) to two upstream Summit 670Vs. Ports 47-48 are the bundled ISL links between the 670Vs. The 8810 has vlan 10 whose gateway is a VRRP setup on the 670Vs. My question is, is it OK to use the ISL ports (47-48) as the data path for vlan 10, or should I use another bundled pair of ports? In other words, should the ISL vlan be the only vlan on the ISL ports?

[Jim_Keeffe]

So is best practice to not use the ISL link for data transit traffic? In this example, vlan 10 is part of the MLAG peer.

[Paul_Russo]

Hey Jim

I agree with Sumit. There is no reason you can't use the ISL link for other traffic as long as it is not blocked by another protocol. If the VLAN is not part of a MALG peer then it will just be bridged based on MAC just like any other traffic. Usually the ISL isn't used simply because everything is dual homed and it takes the most direct path.

The ISC link does not block traffic the blocking is done at the MLAG peer port.

Does that help?

P

[Sumit_Tokle]

I believe you could add vlan 10 in ISL link as in s/w, traffic will get block till peer ports are up and running and there is no loop in the network.