BFD and Juniper?

[Leighton, Russell]

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 at mega-net.ru]
Sent: Sunday, August 16, 2015 1:25 AM
To: Leighton, Russell
Cc: bird-users at 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.






---

With best regards, Dmitry S. Nikolaev



Moscow, Russia

phone: +7 (499) 678 8007 [ext. 6003]

fax: +7 (499) 678 8007 [ext. 7777]

www: http://www.mega-net.ru

mail: dnikolaev at mega-net.ru<mailto:dnikolaev at mega-net.ru>


On 15.08.2015 22:57, Leighton, Russell wrote:
12.3

I'll try Job Snijders suggestions soon.

From: Dmitry S. Nikolaev [mailto:dnikolaev at mega-net.ru]
Sent: Saturday, August 15, 2015 11:14 AM
To: Leighton, Russell
Cc: bird-users at network.cz<mailto:bird-users at network.cz>
Subject: Re: BFD and Juniper?

Hi.

What Junos version on you router ?
There is a bug in Junos 10.4 (and maybe early versions) with SRC address for BFD session if router have several IP`s on one iface.





---

With best regards, Dmitry S. Nikolaev



Moscow, Russia

phone: +7 (499) 678 8007 [ext. 6003]

fax: +7 (499) 678 8007 [ext. 7777]

www: http://www.mega-net.ru

mail: dnikolaev at mega-net.ru<mailto:dnikolaev at mega-net.ru>


On 15.08.2015 17:42, Leighton, Russell wrote:
I'm trying to get bird 1.5.0 to have BFD work with Juniper MX Routers.

Sessions  get stuck in Init state with the Juniper side in Down state.

Any suggestions?

I'm happy to share Juniper traces if that would lend some insight.

Thx in advance.

-Russ

Russell Leighton
Senior Software Development Engineer
Amazon Web Services / EC2 Networking
leightr at amazon.com<mailto:leightr at amazon.com>
Mobile: 301.828.8458



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