From: Chuck Ryan (chryan) (chryan@cisco.com)
Date: Wed Oct 08 2008 - 15:36:44 ART
I just labbed this up.
If you have 1 router configured as RP, and 1 other router configured as
mapping agent, without "ip pim autorp listener" configured, this will
not work under ip pim sparse-mode. You can confirm this with "show ip
pim autorp" on both the RP router and the mapping agent router. The RP
router will show "x" number of RP Announce messages sent, but 0
received, whereas the mapping agent router will show 0 RP Discovery
messages sent and 0 received. You can also see this with "debug ip pim
autorp". You will see the RP is sending RP announce messages, and you
will see the mapping agent router is building RP-Discovery packets, but
they are not being sent because of the absence of PIM Dense mode (or the
absence of the ip pim autorp listener command).
Hope this helps to clear things up for you.
Chuck
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Hobbs
Sent: Wednesday, October 08, 2008 1:22 PM
To: mark.chandra@gmail.com
Cc: Osamah Shaheen; Ali Mousawi; ccielab@groupstudy.com
Subject: Re: Ip PIM Auto-rp Listener
I think it's because your mapping agent is directly connected to both
your RP candidates. The advertisements are allowed to be accepted, they
just won't be forwarded (without autorp listener or sparse-dense-mode).
If you were to make you mapping agent R5, you probably wouldn't see R1
as an RP anymore. Make sure to clear rp mapping if you test this. Also
you could attach another router on either end on R5 or R1 and they would
not receive the rp mappings if you did not have autorp listener on R5 or
R1.
I don't have a lab setup to test..but I am pretty sure this is the
behavior I have seen before
On Wed, Oct 8, 2008 at 11:56 AM, <mark.chandra@gmail.com> wrote:
> Hi Osamah,
>
> I've been experienced the same with you.
>
> So, anyone can explain this behaviour?
> Sent from my BlackBerry. wireless device from XL GPRS/EDGE/3G network
>
> -----Original Message-----
> From: Osamah Shaheen <ShaheenO@maaden.com.sa>
>
> Date: Wed, 08 Oct 2008 08:54:01
> To: Ali Mousawi<mousawi.ali@gmail.com>; Mark Stephanus Chandra<
> mark.chandra@gmail.com>
> Cc: <ccielab@groupstudy.com>
> Subject: RE: Ip PIM Auto-rp Listener
>
>
> I have configured Multicast sparse-mode without ip pim autorp lisnter
> and every thing was working fine, I have seen that group 224.0.0.39 is
> propagated to other multicast routers. I don't know if I'm in wrong
way.
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> Of Ali Mousawi
> Sent: 2008-10-08 06:17
> To: Mark Stephanus Chandra
> Cc: ccielab@groupstudy.com
> Subject: Re: Ip PIM Auto-rp Listener
>
> Hello Mark,
>
> ip pim auto-listener is workaround for cisco auto-rp and it is needed
> in sparse mode. This will allow dense-mode for 2 groups only
> 224.0.0.39 and 224.0.0.40.All other groups will use sparse.
>
> Regards
> Ali
>
> On Tue, Oct 7, 2008 at 6:21 PM, Mark Stephanus Chandra <
> mark.chandra@gmail.com> wrote:
>
> > Dear GS,
> >
> >
> >
> > I have Network Diagram :
> >
> >
> >
> > R5 ---------- SW2 ------------- R1
> >
> >
> >
> > R1 have to be multicast group for 224.0.0.0 -231.255.255.255 and R5
> should
> > be multicast group for 232.0.0.0 - 239.255.255.255
> >
> > SW2 act as the mapping agent
> >
> >
> >
> > This multicast diagram have to in ip pim sparse-mode
> >
> >
> >
> > In solution, I notice we have to use IP Pim auto-rp listener,
> >
> >
> >
> > But before I look at the solution guide, I verify with show ip pim
> > rp-mapping and the mapping is works fine (I think)
> >
> >
> >
> > So can you guys verify what happen if I do not use IP PIm
> autorp-listener.
> >
> >
> >
> > Here ths show ip pim mapping before ip pim rp auto listener
> > configured
> :
> >
> >
> >
> > R1 :
> >
> >
> >
> > R1#sh ip pim rp mapping
> >
> > PIM Group-to-RP Mappings
> >
> > This system is an RP (Auto-RP)
> >
> >
> >
> > Group(s) 224.0.0.0/5
> >
> > RP 150.1.1.1 (?), v2v1
> >
> > Info source: 150.1.8.8 (?), elected via Auto-RP
> >
> > Uptime: 00:23:06, expires: 00:02:34
> >
> > Group(s) 232.0.0.0/5
> >
> > RP 150.1.5.5 (?), v2v1
> >
> > Info source: 150.1.8.8 (?), elected via Auto-RP
> >
> > Uptime: 00:18:35, expires: 00:02:12
> >
> > R1#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), 00:33:42/stopped, RP 0.0.0.0, flags: DP
> >
> > Incoming interface: Null, RPF nbr 0.0.0.0
> >
> > Outgoing interface list: Null
> >
> >
> >
> > (150.1.1.1, 224.0.1.39), 00:33:42/00:02:16, flags: PT
> >
> > Incoming interface: Loopback0, RPF nbr 0.0.0.0
> >
> > Outgoing interface list: Null
> >
> >
> >
> > (150.1.5.5, 224.0.1.39), 00:02:53/00:00:06, flags: PT
> >
> > Incoming interface: FastEthernet0/0, RPF nbr 156.1.18.8
> >
> > Outgoing interface list: Null
> >
> >
> >
> > (*, 224.0.1.40), 00:42:20/stopped, RP 0.0.0.0, flags: DCL
> >
> > Incoming interface: Null, RPF nbr 0.0.0.0
> >
> > Outgoing interface list:
> >
> > Virtual-Access1, Forward/Sparse, 00:42:20/00:00:00
> >
> >
> >
> > (150.1.8.8, 224.0.1.40), 00:23:42/00:02:59, flags: LT
> >
> > Incoming interface: FastEthernet0/0, RPF nbr 156.1.18.8
> >
> > Outgoing interface list:
> >
> > Virtual-Access1, Forward/Sparse, 00:23:44/00:00:00
> >
> >
> >
> > SW2
> >
> >
> >
> > SW2#sh ip pim rp mapping
> >
> > PIM Group-to-RP Mappings
> >
> > This system is an RP-mapping agent (Loopback0)
> >
> >
> >
> > Group(s) 224.0.0.0/5
> >
> > RP 150.1.1.1 (?), v2v1
> >
> > Info source: 150.1.1.1 (?), elected via Auto-RP
> >
> > Uptime: 00:25:14, expires: 00:02:46
> >
> > Group(s) 232.0.0.0/5
> >
> > RP 150.1.5.5 (?), v2v1
> >
> > Info source: 150.1.5.5 (?), elected via Auto-RP
> >
> > Uptime: 00:20:43, expires: 00:02:15
> >
> > SW2#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), 00:33:16/stopped, RP 0.0.0.0, flags: DCL
> >
> > Incoming interface: Null, RPF nbr 0.0.0.0
> >
> > Outgoing interface list:
> >
> > FastEthernet0/0, Forward/Sparse, 00:22:28/00:02:05
> >
> > FastEthernet0/1, Forward/Sparse, 00:26:40/00:02:24
> >
> > Loopback0, Forward/Sparse, 00:33:16/00:02:17
> >
> >
> >
> > (150.1.1.1, 224.0.1.39), 00:25:50/00:02:13, flags: LT
> >
> > Incoming interface: FastEthernet0/1, RPF nbr 156.1.18.1
> >
> > Outgoing interface list:
> >
> > FastEthernet0/0, Forward/Sparse, 00:22:28/00:02:05
> >
> > Loopback0, Forward/Sparse, 00:25:50/00:02:17
> >
> >
> >
> > (150.1.5.5, 224.0.1.39), 00:21:01/00:02:58, flags: LT
> >
> > Incoming interface: FastEthernet0/0, RPF nbr 156.1.58.5
> >
> > Outgoing interface list:
> >
> > Loopback0, Forward/Sparse, 00:21:01/00:02:17
> >
> > FastEthernet0/1, Forward/Sparse, 00:21:01/00:02:24
> >
> >
> >
> > (*, 224.0.1.40), 00:34:15/stopped, RP 0.0.0.0, flags: DCL
> >
> > Incoming interface: Null, RPF nbr 0.0.0.0
> >
> > Outgoing interface list:
> >
> > Loopback0, Forward/Sparse, 00:34:15/00:02:11
> >
> >
> >
> > (150.1.8.8, 224.0.1.40), 00:25:54/00:02:46, flags: PLT
> >
> > Incoming interface: Loopback0, RPF nbr 0.0.0.0
> >
> > Outgoing interface list: Null
> >
> >
> >
> > R5 :
> >
> >
> >
> > R5#sh ip pim rp mapping
> >
> > PIM Group-to-RP Mappings
> >
> > This system is an RP (Auto-RP)
> >
> >
> >
> > Group(s) 224.0.0.0/5
> >
> > RP 150.1.1.1 (?), v2v1
> >
> > Info source: 150.1.8.8 (?), elected via Auto-RP
> >
> > Uptime: 00:22:25, expires: 00:02:14
> >
> > Group(s) 232.0.0.0/5
> >
> > RP 150.1.5.5 (?), v2v1
> >
> > Info source: 150.1.8.8 (?), elected via Auto-RP
> >
> > Uptime: 00:21:35, expires: 00:02:13
> >
> > R5#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), 00:08:29/stopped, RP 0.0.0.0, flags: DC
> >
> > Incoming interface: Null, RPF nbr 0.0.0.0
> >
> > Outgoing interface list:
> >
> > FastEthernet3/0, Forward/Sparse, 00:08:29/00:00:00
> >
> > Virtual-Access1, Forward/Sparse, 00:08:29/00:00:00
> >
> >
> >
> > (150.1.1.1, 224.0.1.39), 00:08:29/00:02:39, flags: T
> >
> > Incoming interface: FastEthernet3/0, RPF nbr 156.1.58.8
> >
> > Outgoing interface list:
> >
> > Virtual-Access1, Forward/Sparse, 00:08:29/00:00:00
> >
> >
> >
> > (150.1.5.5, 224.0.1.39), 00:07:40/00:02:19, flags: T
> >
> > Incoming interface: Loopback0, RPF nbr 0.0.0.0
> >
> > Outgoing interface list:
> >
> > FastEthernet3/0, Forward/Sparse, 00:07:40/00:00:00
> >
> > Virtual-Access1, Forward/Sparse, 00:07:40/00:00:00
> >
> >
> >
> > (*, 224.0.1.40), 00:08:40/stopped, RP 0.0.0.0, flags: DCL
> >
> > Incoming interface: Null, RPF nbr 0.0.0.0
> >
> > Outgoing interface list:
> >
> > FastEthernet3/0, Forward/Sparse, 00:08:44/00:00:00
> >
> > Virtual-Access1, Forward/Sparse, 00:08:44/00:00:00
> >
> >
> >
> > (150.1.8.8, 224.0.1.40), 00:07:50/00:02:15, flags: LT
> >
> > Incoming interface: FastEthernet3/0, RPF nbr 156.1.58.8
> >
> > Outgoing interface list:
> >
> > Virtual-Access1, Forward/Sparse, 00:07:50/00:00:00
> >
> >
> >
> > Thanks guys, really appreciate your help
> >
> >
> >
> >
> >
> > Regards
> >
> >
> >
> > Mark Stephanus Chandra
> > IT Consultant
> >
> >
> > Blogs and organic groups at http://www.ccie.net
> >
> >
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