I’m building an EVPN test network using GNS3 (v2.2.0) and vEOS-lab images (18.104.22.168F) basing the configuration on the EVPN Deployment guide.
I’ve built a network with 2 pairs of leaf switches & a pair of spine switches (see image).
The Underlay BGP network is established fine, and I can reach the endpoints correctly. However when I try and establish the eVPN overlay peerings between the leaf switches and the spines some links never proceed beyond ‘OpenConfirm’ state.
Here the route to the loopback (192.168.31.1) from the spine to the leaf is being learned as ecmpr via both leaf switches:-
B E 192.168.31.1/32 [200/0] via 192.168.30.1, Ethernet1
(e1 is connection to leaf1a e2 is connection to leaf1b)
If I weight the route so that there is only one path (via the direct connection rather than via the iBGP peering) everything comes up as I would expect.
Is this expected? (am I misunderstanding something)
I’m attaching my configuration files for the 6 switches.
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