Tuesday, October 26, 2021

QFX5k and MX480 EVPN VXLAN Troubleshooting

Hey everyone,

I am struggling to get the MACs learned over my VTEP to be forwarded down to the bridged devices.

Basically here is the topolgy
QFX 5k <---L2 Trunk---> MX480 <----BGP---> QFX10k <---BGP--> *QFX5k* <----L2 Trunk----> OLT

The VTEP is running between the MX480 and the *QFX5k*. Both the MX480 and the QFX5k are learning MACs being forwarded over the L2 Trunks from their corresponding directly connected devices. They are propagating those MACs successfully over the VTEP and both the MX480 and the *QFX5k* are learning MAC addresses in the EVPN database from both locations. The issue is the MACs learned over the VTEP are not being forwarded down over the L2 Trunks on either side.

We are seeing both MACs from both sides in the evpn database as well on the evpn bgp table on the MX480 and *QFX5k*

Any ideas why this might be the case?



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