From: Johnny Dedon (johnny.dedon@xxxxxxxxxx)
Date: Thu Apr 19 2001 - 11:23:45 GMT-3
Chia,
The group 255.12.12.12 will be listed as a dense-mode group. If you did not
include it on one of the spokes then I don't believe it would be reachable
from the other if pim dense-mode is not configured. It may still be
reachable from the hub because it will be sent as a psuedo broadcast.
The group-list limits the groups being propagated through sparse-mode.
HTH
Johnny
----- Original Message -----
From: "Chia Kim Seng, Consultant, SCSNW-Sales"
<chiaks@scsnetworks.scs.com.sg>
To: "'Johnny Dedon'" <johnny.dedon@exodus.net>; "Elias, John, NLSOP"
<johnelias@att.com>; <ccielab@groupstudy.com>
Sent: Thursday, April 19, 2001 4:52 AM
Subject: RE: another ip multicasting filtering question
> I had configure Multicast over Frame-Relay.
> Just a simple setup, R1 is Hub and R2 and R3 is spoke.
> R1 is a C-RP and MA config. R2 and R3 each has two multicast group joined
> (225.11.11.11 and 225.12.12.12).
>
> I define a group-list filtering at command 'ip pim send-rp-ann'.
>
> Below is what I had specified
> ip pim send-rp-announce loopback0 scope 16 group-list 5
> access-list 5 permit 225.11.11.0 0.0.0.255
>
> So I try to filter off multicast group 225.12.12.12.
>
> All the routers is running PIM SM. At the Hub I also specified 'ip pim
> nbma-mode'.
>
> Now what I experience is when I ping 225.11.11.11 from HUB, both R2 and R3
> reply.
> When I ping 225.12.12.12 from Hub, both R2 and R3 also reply.
>
> When I 'show ip mroute' it show 225.12.12.12 is in Dense mode.
>
> So this normal?
>
>
>
> Regards
> Chia Kim Seng
>
> SCS Networks Pte Ltd
> 7 Bedok South Road
> Singapore 469272
> Tel : 065-2403164
> Fax: 065-2403110
>
>
> -----Original Message-----
> From: Johnny Dedon [mailto:johnny.dedon@exodus.net]
> Sent: Wednesday, April 18, 2001 9:48 PM
> To: Elias, John, NLSOP; ccielab@groupstudy.com
> Subject: Re: another ip multicasting filtering question
>
>
> Thanks John, OI forgot to answer the second question. You are correct,
> there is no filter for dense mode.
>
> Johnny
> ----- Original Message -----
> From: "Elias, John, NLSOP" <johnelias@att.com>
> To: <ccielab@groupstudy.com>
> Sent: Wednesday, April 18, 2001 8:33 AM
> Subject: RE: another ip multicasting filtering question
>
>
> > Don't think it is possible to filter in dense-mode. The command is
> limitted
> > to sparse-mode. In Dense Mode, the Multicast address is 'pushed' or
> > 'broadcasted' to all the routers in the network that are configured with
> ip
> > multicast-routing and are running dense-mode. If a router does not want
> the
> > multicast traffic, it simply sends a Prune message up the multicast tree
> and
> > the router connected to him that is sending the traffic will stop
sending
> > him the unwanted multicast traffic.
> >
> > John
> >
> > -----Original Message-----
> > From: Johnny Dedon [mailto:johnny.dedon@exodus.net]
> > Sent: Wednesday, April 18, 2001 09:22 AM
> > To: Chia Kim Seng, Consultant, SCSNW-Sales; ccielab@groupstudy.com
> > Subject: Re: another ip multicasting filtering question
> >
> >
> > Not if you only have sparse mode configured. You need to have sparse
> dense
> > mode configured on all the interfaces as I understand it. The notable
> > exceptions are the well known addresses .39 and .40 used for announce
and
> > discovery of the RP.
> >
> > Anyone feel free to correct me here.
> >
> >
> > ----- Original Message -----
> > From: "Chia Kim Seng, Consultant, SCSNW-Sales"
> > <chiaks@scsnetworks.scs.com.sg>
> > To: <ccielab@groupstudy.com>
> > Sent: Tuesday, April 17, 2001 8:31 PM
> > Subject: another ip multicasting filtering question
> >
> >
> > > Guys,
> > >
> > > Is it true that when using filtering in SM mode, all not vaild groups
> will
> > > be in DM mode?
> > >
> > > How about filtering in group in DM mode or this there such thing?
> > >
> > > Regards
> > > Chia Kim Seng
> > >
> > > SCS Networks Pte Ltd
> > > 7 Bedok South Road
> > > Singapore 469272
> > > Tel : 065-2403164
> > > Fax: 065-2403110
> > > **Please read:http://www.groupstudy.com/list/posting.html
> > **Please read:http://www.groupstudy.com/list/posting.html
> > **Please read:http://www.groupstudy.com/list/posting.html
> **Please read:http://www.groupstudy.com/list/posting.html
> **Please read:http://www.groupstudy.com/list/posting.html
**Please read:http://www.groupstudy.com/list/posting.html
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