[Xorp-users] New to this multcast - Can this work with xorp?

Daniel Paquet daniel.paquet at gmail.com
Wed Oct 31 08:41:42 PDT 2007


Okay I did the reading and yes it was very good for me to better understands
the process.

I think that my setup it okay now and that the problem lies out of my linux
box. But this part is not under my control.

The setup is for ip phones. The phones are on the same network as the eth0
network card, and my tunnel is linked to a distant 2811 cisco router.

The RP is a single machine (10.254.0.1).

My local eth0 ip is 10.132.3.20
The ip of the tunnel is : 10.254.0.14
and the ip of the remote machine on the other end of the tunnel is :
10.254.0.13

The thing now is that my linux box do not join any multicast group...

Here is the output of show igmp group

Interface    Group           Source          LastReported Timeout V State
eth0         224.0.0.2       0.0.0.0         10.132.3.20      206 2     E
eth0         224.0.0.13      0.0.0.0         10.132.3.20      205 2     E
eth0         224.0.0.22      0.0.0.0         10.132.3.20      199 2     E
tun0         224.0.0.2       0.0.0.0         10.254.0.14      201 2     E
tun0         224.0.0.13      0.0.0.0         10.254.0.14      203 2     E
tun0         224.0.0.22      0.0.0.0         10.254.0.14      205 2     E


In fact I see that the only machines that answers the IGMP are my local
mathines IF
I have igmp enabled on both interface (tunnel and eth0)

A show pim join dont output anyting I have to send a show pim join all and
now I get.

Group           Source          RP              Flags
224.0.0.0       10.254.0.1      10.254.0.1      RP
    Upstream interface (RP):   tun0
    Upstream MRIB next hop (RP): UNKNOWN
    Upstream state:            NotJoined
    Join timer:                -1
    Joins RP:                  ...
    Join state:                ...
    Prune state:               ...
    Prune pending state:       ...
    Could assert WC:           ...
    I am DR:                   OOO
    Immediate olist RP:        ...
    Inherited olist SG:        ...
    Inherited olist SG_RPT:    ...

>From this I know that I am not in the multicast group...

Just for my information, do I have to enable PIM on both interface? Or only
on my tunnel interface?
And I read that PIM-SM works with IGMP so am I right when I say that it
can't work with anyting else like RIP and OSPF?
The thing is also that I dont see the IGMP join request from the phones on
my eth0 interface, I should see them right?

Ive set ip_forward to 1
rp_filter are all set to 0

Do you want me to paste my xorp conf file? I know that some hates the config
file pasting ;)

Thanks for your time :)

-- 
Ubuntu est un ancien mot africain qui veut dire "Je ne peux pas configurer
Debian"
--
Daniel Paquet
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