From: kevin gannon (kevin@gannons.net)
Date: Wed Nov 02 2005 - 17:45:35 GMT-3
The TTL was to do with the OSPF rather than the Autorp
part of the discussion.
Regards
Kevin
On 11/2/05, Scott Morris <swm@emanon.com> wrote:
> 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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