Has anyone attempted to implement BGP peers with 31-bit prefix links between Nexus devices?
We are having some issues with BGP peerings where a new peer will sit at Idle/Active until the Nexus are rebooted. Once a reboot is done, the peer comes up and is able to be bounced even and will still come back up. It seems like the Nexus may not be allowing the session on a per-neighbor basis. It seems to work if you use prefixes below /31.
IP reachability between the two devices is fine. ARP looks good and Ping works as well as other protocols. It just will not bring up the neighbor initially unless a reboot occurs.
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We are working on a VXLAN EVPN deployment and would like to run EBGP as the underlay/overlay and /31 prefixes are the preference to use for P2P links between Spine and Leaf.
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We are opening a TAC case but I just wanted to get some opinons to see if anyone had any experience with this.
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The devices are Nexus 9K's running 7.0.3 code train.
Sample Config:
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router bgp 65000
log-neighbor-changes
address-family ipv4 unicast
maximum-paths 2
neighbor 10.0.0.1
remote-as 65010
address-family ipv4 unicast
send-community both
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