RE: FreeBSD, OSPF, and multicast

1 Nov 2013


      ...
-----Original Message-----
From: Claude Marinier
Sent: Friday, November 01, 2013 9:05 AM
To: 'Ondrej Filip'
Subject: RE: FreeBSD, OSPF, and multicast
...
-----Original Message-----
From: owner-bird-users@atrey.karlin.mff.cuni.cz [mailto:owner-bird-
users@atrey.karlin.mff.cuni.cz] On Behalf Of Ondrej Filip
Sent: Thursday, October 31, 2013 6:37 PM
To: Claude Marinier; bird-users@bird.network.cz
Subject: Re: FreeBSD, OSPF, and multicast
On 31.10.2013 14:38, Claude Marinier wrote:
...
Hi,
I am building a WAN emulator using a FreeBSD server with DummyNet
for WAN effects and BIRD for OSPF. At first, no multicast packets
left the server; then I added a default route and they left by that
interface only. How can I configure the server so BIRD sends HELLO
packets out all the interfaces.
Can you send 'show ospf interfaces' and maybe also check if there are
no errors
BIRD 1.3.11 ready.
bird> show ospf int
WANemu:
Interface bce0 (xxx.xxx.xxx.8/29)
        Type: broadcast
        Area: 0.0.0.0 (0)
        State: dr
        Priority: 1
        Cost: 10
        Hello timer: 10
        Wait timer: 40
        Dead timer: 40
        Retransmit timer: 5
        Designed router (ID): xxx.xxx.xxx.14
        Designed router (IP): xxx.xxx.xxx.14
        Backup designed router (ID): 0.0.0.0
        Backup designed router (IP): 0.0.0.0 Interface bce1 (xxx.xxx.xxx.184/29)
        Type: broadcast
        Area: 0.0.0.0 (0)
        State: dr
        Priority: 1
        Cost: 10
        Hello timer: 10
        Wait timer: 40
        Dead timer: 40
        Retransmit timer: 5
        Designed router (ID): xxx.xxx.xxx.14
        Designed router (IP): xxx.xxx.xxx.189
        Backup designed router (ID): 0.0.0.0
        Backup designed router (IP): 0.0.0.0
bird> show ospf neighbors
WANemu:
Router ID       Pri          State      DTime   Interface  Router IP
xxx.xxx.xxx.9     1         init/other  00:37   bce0       xxx.xxx.xxx.9
xxx.xxx.xxx.185   1         init/other  00:33   bce1       xxx.xxx.xxx.185
...
bird> echo all
bird> debug all all
There is a lot of output. How can this be restricted to HELLO messages?
Got something useful from 'debug all all'.
...
...
...
device1: Scanning interfaces
WANemu: HELLO packet received from 131.140.113.9 via bce0
WANemu: HELLO packet received from 131.140.113.185 via bce1
device1: Scanning interfaces
WANemu: HELLO packet sent via bce1
WANemu: HELLO packet sent via bce0
WANemu: HELLO packet received from 131.140.113.9 via bce0
WANemu: HELLO packet received from 131.140.113.185 via bce1
I am also running 'tcpdump' on one of the interfaces:
 - it does not show bird's HELLO packets
 - it does show the Cisco router's HELLO packets
 - it does show CDP packets from the Cisco router
 - it does show CDP packets from the server running bird
...
I suspect that there is an underlying assumption (like IGMP or PIM) which I
have not yet discovered.
...
Ondrej
...
Thank you.
Details:
FreeBSD WAMemu 9.2-RELEASE FreeBSD 9.2-RELEASE #0 r255898: Thu Sep
26 22:50:31 UTC 2013
root@bake.isc.freebsd.org:/usr/obj/usr/src/sys/GENERIC  amd64
bird-1.3.11
P.S. I got it working by avoiding multicast with 'type nonbroadcast' and
'neighbors'.
...
...
--
Claude Marinier