From: simon hart (simon@harttel.com)
Date: Wed Nov 02 2005 - 16:37:08 GMT-3
Unfortunately I cannot lab it up at the moment as all my routers are in
storage :(
However if you have a copy of J. Doyles Routing TCP/IP refer to page 559,
there is a configuration which reflects the point I was trying to make
earlier. Additionally I can confirm that this type of config does work.
But you are right that R2 and R3 will not form an adjacency, as they will
only form an adjacency with the DR, and in this case you will need to make
sure that R1 is the DR, and that R2 and R3 do not participate in the
election. So I guess that R2 thinks it is sending packets to everyone
(virtue of the fact of the broadcast statement on the end of each map
command), but in reality the DR router (R1) will not pass the packets to R3.
Simon
-----Original Message-----
From: Chris Lewis [mailto:chrlewiscsco@yahoo.com]
Sent: 02 November 2005 18:57
To: simon hart; Scott Morris; 'Michael Brooks'; ccielab@groupstudy.com
Subject: RE: Does PIM dense mode or sparse-dense mode work over frame
relay?
I do not believe R2 and R3 will form adjacencies without further
configuration, either another DLCI between them, a tunnel or something like
that. The multicast packets will not make it fomr spoe to spoke
Chris
simon hart <simon@harttel.com> wrote:
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_r
lay.
h
tm#69070
Regards,
Mike
On 11/1/05, Scott Morris 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 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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