From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Mon May 22 2006 - 10:41:43 ART
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.
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> -----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