From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Tue May 23 2006 - 10:44:55 ART
Post your specific design along with configs and "show ip route", "show
ip mroute", "show ip mroute count", and "show ip pim rp mapping"
Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
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> -----Original Message-----
> From: Nick Griffin [mailto:ngriffin@sio.midco.net]
> Sent: Monday, May 22, 2006 10:02 PM
> To: Brian McGahan
> Cc: Koen Zeilstra; Cisco certification
> Subject: Re: sparse-mode without configuring RP !!
>
> Brian, so in a hub and spoke environment, where you typically would
have
> and OIL issue for the auto rp groups you are saying on that hub router
> that you can statically map the ma/rp groups .39 and .40 to the rp?
> Effectively allowing those groups to operate in sparse mode, and by
> enabling nbma mode, you could then propogate the rp information via
> sparse operation to the other spoke? I'm unable to get this to work in
> my lab. Sorry to beat a dead horse.
>
> Brian McGahan wrote:
> > Auto-RP doesn't necessarily require dense mode. Sparse-dense
> > mode and the autorp listener feature both run the auto-rp announce
and
> > discover (224.0.1.39 and 224.0.1.40) groups as dense. You can
however
> > configure a default RP for these groups statically, which would
allow
> > the entire network to be sparse only. The config would be something
> > like:
> >
> > access-list 1 permit 224.0.1.39
> > access-list 1 permit 224.0.1.40
> > !
> > ip pim rp-address 1.2.3.4 1
> >
> > HTH,
> >
> > Brian McGahan, CCIE #8593
> > bmcgahan@internetworkexpert.com
> >
> > Internetwork Expert, Inc.
> > http://www.InternetworkExpert.com
> > Toll Free: 877-224-8987 x 705
> > Outside US: 775-826-4344 x 705
> > 24/7 Support: http://forum.internetworkexpert.com
> > Live Chat: http://www.internetworkexpert.com/chat/
> >
> >
> >
> >> -----Original Message-----
> >> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On
Behalf
> >>
> > Of
> >
> >> Koen Zeilstra
> >> Sent: Monday, May 22, 2006 4:54 AM
> >> To: Cisco certification
> >> Subject: Re: sparse-mode without configuring RP !!
> >>
> >> Gianpietro,
> >>
> >> Auto-rp uses DM. However if all the multicast routers are directly
> >> connected to the mapping agent. It WILL work. Make sure the mapping
> >>
> > agent
> >
> >> is the hub router. The RP can be located somewhere else.
> >>
> >> Multicast packets on a local subnet always find the destionation as
> >>
> > long
> >
> >> as no routing is involved.
> >>
> >> regards,
> >>
> >> Koen Zeilstra
> >>
> >> -----------------------
> >> Q: How did you get into artificial intelligence?
> >> A: Seemed logical -- I didn't have any real intelligence.
> >>
> >> On Sat, 20 May 2006, Gianpietro Lavado wrote:
> >>
> >> | George,
> >> |
> >> | Auto-RP uses groups 224.0.1.39 and .40 for the RP & mapping
agent
> >> | announces, but this groups work only on dense mode. If you are
> >> restricted
> >> | to use sparse mode only, you can use the 'ip pim auto-rp
listener'
> >> command
> >> | on every router (which activates dense-mode for this two groups
> >>
> > only) or
> >
> >> | else you can use BSR.
> >> |
> >> | Also since you are working on a FR hub&spoke network, be careful
> >>
> > with
> >
> >> | multicast traffic between the spokes not getting through the
spokes;
> >>
> > if
> >
> >> you
> >> | have this problem you should use nbma-mode on the hub.
> >> |
> >> | Regards
> >> |
> >> | Gianpietro
> >> |
> >> |
> >> | On 5/20/06, george stanza <cert2006@gmail.com> wrote:
> >> | >
> >> | > thats right..
> >> | > i used send-rp-announce and rp-discover/rp-filter commands as
> >>
> > follows
> >
> >> on
> >> | > the
> >> | > hub..
> >> | >
> >> | > ip pim send-rp-announce Loopback0 scope 16 group-list 55
> >> | > ip pim send-rp-discovery Loopback0 scope 16
> >> | > ip pim rp-announce-filter rp-list 23 group-list 55
> >> | > !
> >> | > access-list 23 permit 4.4.5.5
> >> | > access-list 55 permit 224.1.1.1
> >> | >
> >> | >
> >> | > One spoke router has an ethernet interface joining 224.1.1.1
but
> >>
> > the
> >
> >> | > spokes
> >> | > dont have their mroute tables populated..Any idea whats going
on..
> >> | >
> >> | > r2#sh ip mroute 224.1.1.1
> >> | > Group 224.1.1.1 not found
> >> | >
> >> | > r2#sh ip mroute
> >> | > IP Multicast Routing Table
> >> | > Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM Group, C
-
> >> | > Connected,
> >> | > L - Local, P - Pruned, R - RP-bit set, F - Register flag,
> >> | > T - SPT-bit set, J - Join SPT, M - MSDP created entry,
> >> | > X - Proxy Join Timer Running, A - Candidate for MSDP
> >> Advertisement,
> >> | > U - URD, I - Received Source Specific Host Report,
> >> | > Z - Multicast Tunnel, z - MDT-data group sender,
> >> | > Y - Joined MDT-data group, y - Sending to MDT-data group
> >> | > Outgoing interface flags: H - Hardware switched, A - Assert
winner
> >> | > Timers: Uptime/Expires
> >> | > Interface state: Interface, Next-Hop or VCD, State/Mode
> >> | >
> >> | > (*, 224.0.1.39), 00:02:16/stopped, RP 0.0.0.0, flags: DP
> >> | > Incoming interface: Null, RPF nbr 0.0.0.0
> >> | > Outgoing interface list: Null
> >> | >
> >> | > (4.4.5.5, 224.0.1.39), 00:02:01/00:00:58, flags: PT
> >> | > Incoming interface: Serial2/2, RPF nbr 4.4.245.5
> >> | > Outgoing interface list: Null
> >> | >
> >> | > (*, 224.0.1.40), 00:02:20/stopped, RP 0.0.0.0, flags: DPL
> >> | > Incoming interface: Null, RPF nbr 0.0.0.0
> >> | > Outgoing interface list: Null
> >> | >
> >> | > (4.4.5.5, 224.0.1.40), 00:01:35/00:02:32, flags: PLT
> >> | > Incoming interface: Serial2/2, RPF nbr 4.4.245.5
> >> | > Outgoing interface list: Null
> >> | >
> >> | >
> >> | >
> >> | >
> >> | >
> >> | > On 5/20/06, Petr Lapukhov <petrsoft@gmail.com> wrote:
> >> | > >
> >> | > > You mean, without configuring static RP on any router? :)
> >> | > >
> >> | > > 2006/5/20, george stanza <cert2006@gmail.com>:
> >> | > > >
> >> | > > > group,
> >> | > >
> >> | > > i am puzzled with a little question here which says to
configure
> >>
> > a
> >
> >> | > > sparse-mode on a frame-relay without using the RP on any of
the
> >> | > routers..
> >> | > > I,
> >> | > > so, used the rp-discover and rp-announce commands, but then
the
> >> | > multicast
> >> | > > groups wont form. The mroute database shows empty.. Any
examples
> >>
> > of
> >
> >> | > this..
> >> | > >
> >> | > > //G
> >> | > >
> >> | > >
> >>
> >>
> >
This archive was generated by hypermail 2.1.4 : Thu Jun 01 2006 - 06:33:22 ART