[159755] in North American Network Operators' Group
Re: Multicast over GRE between Linux server and Cisco Router
daemon@ATHENA.MIT.EDU (Tom Ammon)
Sun Jan 20 18:01:50 2013
In-Reply-To: <CAEV7mMFTF-SyP0EU+OnqrFJo_Us8EkY79Ce7soki2VmJuUsHBw@mail.gmail.com>
Date: Fri, 18 Jan 2013 20:07:46 -0700
From: Tom Ammon <thomasammon@gmail.com>
To: Brian Christopher Raaen <mailing-lists@brianraaen.com>
Cc: North American Networking and Offtopic Gripes List <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
IGMP packets are sent with TTL=1. Is the tunnel interface on the router
enabled for PIM?
Tom
On Fri, Jan 11, 2013 at 5:11 AM, Brian Christopher Raaen <
mailing-lists@brianraaen.com> wrote:
> Just a quick note. I do have multicast enabled on the server gre1
> interface. A tshark capture shows the igmp group queries from the router
> and the igmp join reply from the server.
>
>
> On Wed, Jan 9, 2013 at 10:51 AM, Brian Christopher Raaen <
> mailing-lists@brianraaen.com> wrote:
>
> > I am trying to set up multicast between a Linux server and Router using
> > GRE. The GRE tunnel is up fine and I can see traffic go across it, but
> the
> > router is not indicating it is receiving the IGMP joins that the server
> is
> > sending. I have identical setting with another server attached to
> > fastethernet0/1 and it is joined to the group fine, but I am not able to
> > get the server to link to the router via GRE interface. Note that I have
> > another server behind another router where the two routers do GRE and PIM
> > and that on is working fine. Is there some reason that IGMP joins would
> > not work across the GRE link, but another router using PIM would?
> >
> > --
> > Brian Christopher Raaen
> > Network Architect
> > Zcorum
> >
>
>
>
> --
> Brian Christopher Raaen
> Network Architect
> Zcorum
>
--
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Tom Ammon
Network Engineer
M: (801) 674-9273
tom@tomsbox.net
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