From: Bob Sinclair (bob@bobsinclair.net)
Date: Fri Jan 13 2006 - 21:34:59 GMT-3
Hi Chris,
To me, there are only two interesting kinds of problems in multicast: RPF
problems and OILIST problems. Seems to me your basic spoke-to-spoke multicast
issue is not an RPF problem, but an OILIST problem.
RPF problems arise when multicast arrives on an interface that is not
acceptable. By default, the acceptable interface is that interface on the
shortest path to the source. There are two ways to fix this kind of problem:
send the multicast on the acceptable interface, or make the interface on which
it is arriving acceptable. There are two ways to make the interface
acceptable: change the unicast routing table, or override it with a static
mroute.
OILIST problems arise from the rule that says "the incoming interface cannot
be on the outgoing interface list". AFAIK, there is now way to multicast in
and back out of a multipoint frame interface using Dense Mode. In order to
get multicast from spoke to spoke using Dense mode, you will have to tunnel
it.
HTH,
Bob Sinclair
CCIE #10427, CCSI 30427
www.netmasterclass.net
----- Original Message -----
From: Chris Atkins
To: ccielab@groupstudy.com
Sent: Friday, January 13, 2006 5:12 PM
Subject: Fw: PIM Dense-Mode
Hi all
Still bit lost on this. Any sugestions most appreciated.
Cheers
Chris
----- Original Message -----
From: "Chris Atkins" <chris_atkins@blueyonder.co.uk>
To: "Chris Atkins" <chris_atkins@blueyonder.co.uk>
Sent: Wednesday, January 04, 2006 4:59 PM
Subject: Re: PIM Dense-Mode
> Any feedback would be appreciated,
>
> Many thanks
>
> Chris
> ----- Original Message -----
> From: "Chris Atkins" <chris_atkins@blueyonder.co.uk>
> To: <ccielab@groupstudy.com>
> Sent: Tuesday, January 03, 2006 12:02 PM
> Subject: PIM Dense-Mode
>
>
> > 3----------------1--------------2
> >
> > Hi All
> > With Pim dense mode what is the best way to get over the RPF issues on
a
> > frame-relay multipoint set up. If R1 is the hub is it best to tunnel
> between
> > R3 and R2 to resolve the issue so R3 can Transmit to R2?
> >
> > Thanks in advance
> >
> > Chris.
> >
> > _______________________________________________________________________
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