From: Scott Morris (swm@emanon.com)
Date: Wed Nov 02 2005 - 17:17:40 GMT-3
Two different things.
Anything with 224.0.0.x is a local-link multicast and has a TTL of 1.
You are correct though about the AutoRP not working that way, because when
you do "show ip mroute" the same interface will not be in both the Incoming
Interface List and Outgoing Interface List for the same group. Kinda like
split horizon.
If you make your hub the MA (or someone behind the hub) it will work,
because the RP sends it's announcements on one group and the MA sends its
discoveries on another group, so the same interface CAN be incoming to one
group and outgoing to another which is what you'd do.
HTH,
Scott
-----Original Message-----
From: simon hart [mailto:simon@harttel.com]
Sent: Wednesday, November 02, 2005 1:42 PM
To: Scott Morris; 'Michael Brooks'; ccielab@groupstudy.com
Subject: RE: Does PIM dense mode or sparse-dense mode work over frame relay?
I guess this is slightly off-topic, but it got me thinking.
The reason Auto-rp will not work from a spoke configured as mapping agent is
that a multicast packet will not exit the same interface it entered,
therefore 224.0.1.39 and .40 do not get propogated correctly.
Now if I have a partial mesh frame network
R1
/ \
/ \
R2 R3
On R2 and R3 I have map statements to both R1 and each other with the
broadcast command on each statement. I then configure each interface as ip
ospf network broadcast - the correct adjacencies would form in the same
fashion as that what would happen in a true broadcast network (aka
ethernet).
So R2 will be sending ospf hello's etc to R3 and R1 with the mcast address
of 224.0.0.5 I assume then that the ospf mcast will be sent out of the
interface it is recieved on, breaking the normal Mcast rule.
Any comments?
Simon
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of Scott
Morris
Sent: 02 November 2005 02:59
To: 'Michael Brooks'; ccielab@groupstudy.com
Subject: RE: Does PIM dense mode or sparse-dense mode work over frame relay?
Ok, so they have pictures and I didn't. :)
Thanks! I was looking for that before, but didn't find it in a timely
fashion!
Scott
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Michael Brooks
Sent: Tuesday, November 01, 2005 9:52 PM
To: ccielab@groupstudy.com
Subject: Re: Does PIM dense mode or sparse-dense mode work over frame relay?
This explains it also:
http://www.cisco.com/univercd/cc/td/doc/cisintwk/intsolns/mcst_sol/frm_rlay.
h
tm#69070
Regards,
Mike
On 11/1/05, Scott Morris <swm@emanon.com> wrote:
>
> Actually, it's a very good reference book all around. But you're
> right, it's just for multicast. If you aren't ever going to run
> multicast in real-life, you probably don't care! :)
>
> On the other hand, Amazon.com <http://Amazon.com> offers it used as
> well to save money!
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> Of dusth@comcast.net
> Sent: Tuesday, November 01, 2005 9:37 PM
> To: test; ccielab@groupstudy.com
> Subject: Re: Does PIM dense mode or sparse-dense mode work over frame
> relay?
>
> Sound like the millionaire talking here:). spent $50.00 just for one
> question topic:) I'm not Mr. Bill Gate.
>
> -------------- Original message --------------
>
> > The Williamson multicast book around page 464 really provided that
> > 'ah-ha' moment for me about the subject.
> >
> > Ben
> >
> > cciein2006@yahoo.com wrote:
> >
> > >Does PIM dense mode or sparse-dense mode work over frame relay? I
> > >tried the ip
> > pim nbma-mode command on a multipoint frame-relay interface but it
> > generates an error message saying that PIM nbma-mode is not
> > recommended for dense mode or sparse-dense mode?
> > >
> > >Why is this?
> > >
> > >___________________________________________________________________
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