What a way to spend a sick day :) Dumb question, the remote end definitely supports bfd? (My SAU links don’t :( ) Are you permitting 3784 UDP and 3785 TCP/UDP in your input and output chains? Can you see 3784/3785 traffic on your BGP interface? BFD on my configs is pretty much as simple as yours, > interface listed in BFD > bfd = yes in BGP > firewall rules permitting… Hope something in there helps, DB On 20 Aug 2024, at 4:52 PM, Damien Gardner Jnr via Public <public@talk.mikrotik.com.au> wrote:
So, I was off work sick today, have been holding off on upgrading all my 'production' gear to ROS 7 until BFD support was a thing. Supposedly it's now supported, so I upgraded one of my routers (RB1100AHx4). And yeah, BFD does not appear to work :(
Asked a few colleagues, and it's working for them. We compared configs, and identical configs basically, just different hardware on the other side.
Is there a trick to it? Is it only supported on specific Mikrotik hardware? Or only TO/FROM specific remote hardware? I tried enabling logging (/system logging add prefix=debug topics=bfd), which didn't really add anything.. Remote end is Cisco Nexus
Config is basically:
/routing bfd configuration add disabled=no interfaces=vlan300_WyongBGP /routing bgp connection add as=65001 connect=yes disabled=no hold-time=6s input.filter=BGP_SAU_TOR_IN_V4 keepalive-time=2s listen=yes local.address=103.235.x.x .role=ebgp name=SAU-TOR-WYONG-V4 output.filter-chain=BGP_SAU_TOR_OUT_V4 \ .network=bgp-networks .no-client-to-client-reflection=yes .redistribute=connected,static,vpn,dhcp remote.address=103.235.x.x/32 .as=64101 .port=179 router-id=103.235.x.x routing-table=main templates=SAU \ use-bfd=yes
If I watch the BFD sessions, I'll see it show as 'dead',. and then disappear, then show as dead, then disappear..
Any thoughts? I've set this one to a 6 second hold timer, and halted the other upgrades for now. I've also reset the config and configured from scratch incase it was a v6>v7 upgrade issue, but still the same problem..
Thankyou! --
Damien Gardner Jnr VK2TDG. Dip EE. GradIEAust rendrag@rendrag.net - http://www.rendrag.net/ -- We rode on the winds of the rising storm, We ran to the sounds of thunder. We danced among the lightning bolts, and tore the world asunder _______________________________________________ Public mailing list Public@talk.mikrotik.com.au http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com.au