FreeBSD, OSPF, and multicast

[Claude Marinier]

> -----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 at atrey.karlin.mff.cuni.cz [mailto:owner-bird-
> > users at atrey.karlin.mff.cuni.cz] On Behalf Of Ondrej Filip
> > Sent: Thursday, October 31, 2013 6:37 PM
> > To: Claude Marinier; bird-users at 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 at 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