[j-nsp] Multicast config in ERX-310

F J ripprapp at hotmail.com
Wed Apr 20 01:57:49 EDT 2005


Hi,
A big thanks to Terje!

I came to work.... sniffed with Ethereal... Saw that TTL was equal to 1 as 
he ... Banned VLC GUI for a couple of minutes :) and started the Multicast 
stream from the CLI instead... Works like a charm!

My problems had nothing to do with the ERX in the end...

BR
/// Fredrik

>From: Terje Krogdahl <terje at krogdahl.net>
>To: Fredrik Jansson <ripprapp at hotmail.com>
>CC: juniper-nsp at puck.nether.net
>Subject: Re: [j-nsp] Multicast config in ERX-310
>Date: Tue, 19 Apr 2005 22:47:40 +0200
>
>On Tue, Apr 19, 2005 at 10:29:51PM +0200, Fredrik Jansson wrote:
> > server (i.e. PC with VLC) which is connected to one of the interfaces.
> > Shouldn't I see a (S,G) pair then when issuing an 'show ip mroute'
> > command?
>
>I haven't tried this on an E-series, but I've been bitten by the fact that
>VLC (from the GUI) by default sends its multicast packets with TTL=1. Since
>the router (a Cisco in my case) could not forward the packet anyway, the
>(S,G) state was not installed. Using the --ttl=12 (or whatever) parameter
>from the CLI solved the issue for me. This is using VLC 0.8.1 on Linux.
>
>
>--
>Terje Krogdahl
>
>   All roads lead to Rome
>      - A clearly confused router (R. Perlman)

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