[Xorp-users] ip igmp join-group and xorp

[Pavlin Radoslavov]

I believe the Cisco "ip igmp join-group" is used to have the router
join a particular multicast group.
In XORP you don't need to use this for the purpose of multicast
routing.

I am not familiar with Cisco's configuration so I can't comment on
the lack of RP in the config. It could be that the router might be
obtaining the Cand-RP info from the Bootstrap or the Auto-RP
mechanism.

In your XORP configuration you can start with the sample
rtrmgr/config/multicast4.boot file (if you have the latest code from
anon. CVS) or available from the following URL:
http://cvsweb.xorp.org/cgi-bin/cvsweb.cgi/xorp/rtrmgr/config/multicast4.boot

XORP supports two mechanisms for configuring the RPs: Bootstrap and
Static RPs. You can use the Bootstrap mechanism only if the rest of
your network is configured to use it; otherwise you need to use
static RPs in your config.

Hope that helps,
Pavlin

Rajkumar S <rajkumars at gmail.com> wrote:

> Hi,
> 
> I have a Cisco multicast router and am planning to replace it with
> xorp. The configs of Cisco are as follows. The multicast happens over
> a gre tunnel. I am confused about the "ip igmp join-group" command in
> cisco. I do not see an equivalent command in xorp user manual. Also
> there is no mention of RP in cisco config. How can xorp be configured
> in this scenario?
> 
> ip multicast-routing
> !
> call rsvp-sync
> !
> interface Tunnel0
>  ip address 22.22.22.254 255.255.255.252
>  ip pim sparse-dense-mode
>  ip igmp join-group 239.2.221.69
>  tunnel source FastEthernet0/0
>  tunnel destination 10.1.21.150
> !
> interface FastEthernet0/1
>  ip address 10.80.10.210 255.255.255.0
>  ip pim sparse-dense-mode
>  duplex auto
>  speed auto
> !
> ip classless
> ip route 0.0.0.0 0.0.0.0 10.1.21.177
> ip route 10.253.19.5 255.255.255.255 FastEthernet0/0 name Tunnel0
> ip route 10.253.21.148 255.255.255.252 10.1.21.177
> ip http server
> 
> Full cisco config is at http://pastebin.ca/1016804 Is there any
> information required from the other end of tunnel?
> 
> Any help would be much appreciated!
> 
> Thanks and regards,
> 
> raj
> 
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