Tuesday, June 1, 2021

Downstream switches not learning VRRP mac addresses for certain VLAN's

Hi,

We are having a fairly strange issue, it could be a very simple resolution but I can't seem to figure it out, just looking for some idea's to check that we might not have thought of.

We use pfsense as our main router, we have a Dell N4046F stack as our core, and multiple various Dell Edge switches hanging off them.

For some odd reason, the core and the first edge switches work correctly in that they learn the MAC of the VRRP for the specific VLAN. The problem is that switches below that don't, but only for certain VLAN's.

Because the switch doesn't learn the MAC, it spams the traffic out on all ports on that vlan and the trunk too. The next switch up, works correctly.

Any ideas?



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