Thx, replies below.
I sent another email with Juniper traces and Wireshark screenshots but it is big and waiting on moderator approval.
It is interesting that the MX thinks Bird is in AdminDown but bird thinks it is in Init
MX “show bfd sessions extensive”:
Address State Interface Time Interval Multiplier
169.254.255.1 Down xe-2/0/0.2 0.000 1.000 5
Client BGP, TX interval 0.100, RX interval 0.010
Local diagnostic None, remote diagnostic None
Remote state AdminDown, version 1
Replicated
Min async interval 0.100, min slow interval 1.000
Adaptive async TX interval 0.100, RX interval 0.010
Local min TX interval 1.000, minimum RX interval 0.010, multiplier 5
Remote min TX interval 0.000, min RX interval 0.000, multiplier 0
Local discriminator 2058, remote discriminator 0
Echo mode disabled/inactive, no-absorb, no-refresh
Session ID: 0x87f
1 sessions, 1 clients
Cumulative transmit rate 1.0 pps, cumulative receive rate 0.0 pps
Bird “show bfd sessions”:
bird> show bfd sessions
bfd1:
IP address Interface State Since Interval Timeout
169.254.255.3 --- Init 18:47:50 1.000 5.000
169.254.255.2 --- Init 18:47:49 1.000 3.000
169.254.255.4 --- Init 18:47:46 1.000 3.000
The bird debug logs were not informative.
I will check the firewall … good point. The MX is getting some bfd based on the traces but maybe the firewall is disrupting things.
From: Dmitry S. Nikolaev [mailto:dnikolaev@mega-net.ru]
Sent: Sunday, August 16, 2015 1:25 AM
To: Leighton, Russell
Cc: bird-users@network.cz
Subject: Re: BFD and Juniper?
Hi.
1. What output on MX for:
# show bfd session extensive
2. What output on BIRD for:
> show bfd sessions
3. Try to enable debug for BFD on bird and see what happens in log file.
4. Use tcpdump on BIRD side to see all BFD packets are send or recieved.
5. Do you have firewall on MX ?
Check firewall, it must not block ports: UDP 3784, 4784
for your neighbor`s IP.