[FROG] FreeBSD 12.1 / FRR 7.4, error inserting v6 routes into zebra/kernel

[Muenz, Michael]

Hi,


I'm maintaining the FRR plugin for OPNsense Firewall, currently based on 
FreeBSD/HardenedBSD 12.1 with FRR 7.4.

I received a report from a user that a peering via v6 the bgpd 
successfully receives the v6 routes which are also displayed in sh bgp 
ipv6, but they wont get into the routing table and in frr.log there's:

kernel_rtm: X:X:X:X rtm_write() unexpectedly returned -2 for command RTM_ADD

Bit more details and screenshots are also here available:

https://twitter.com/TallWireless/status/1309489192502734850