From: Bob Sinclair (bob@bobsinclair.net)
Date: Mon Oct 03 2005 - 09:03:27 GMT-3
Mike,
The nbma-mode on the hub was a good idea. Here are a few things to check. Do
all three routers get the RP information? Issue the command: show ip pim rp
mapping. Do you have clients configured on the spoke routers? If so, you
should see (*,G) entries for them locally. Make sure that when you test you
do an extended ping with a high repeat count; otherwise the state may timeout
before you can see it. A few more helpful commands: debug ip mpacket; show
ip pim interface count.
HTH,
Bob Sinclair
CCIE #10427, CCSI 30427, CISSP
www.netmasterclass.net
----- Original Message -----
From: Mike Flanagan
To: Cisco certification
Sent: Monday, October 03, 2005 4:03 AM
Subject: Trouble with multicast over NBMA
Hello,
I originally posted this a few weeks ago and then got sick and have
not touched this. What I am trying to do here is get multicast
working over 3 routers. Router R2 is the hub and is the mapping agent
and R1 and R3 are RP's for two different multicast networks. If you
do a show ip rp map on R2 you see that it has the two multicast
networks on it. if you do a show ip mroute on and of these 3 routers
you do not see the networks at all. I tried adding ip pim nbma mode
on R2 due to the fact that you cannot announce a multicast group back
out an interface that was learned. With the theory in mind of
changing the OIL from using the interface to an IP address but that
did not work. I am not sure if I am missing something simple "which
is highly likely ;)" or if maybe I need to make a tunnel between R1
and R3.
Please advise.
Thanks,
Mike F.
R2
/ \
/ \
R1 R3
R1#sh run int ser 0/0.5
Building configuration...
Current configuration : 227 bytes
!
interface Serial0/0.5 multipoint
ip address 1.1.0.1 255.255.255.0
ip pim nbma-mode
ip pim sparse-dense-mode
ip ospf priority 0
frame-relay map ip 1.1.0.2 105 broadcast
frame-relay map ip 1.1.0.3 102
end
R1#
ip pim send-rp-announce Loopback0 scope 16 group-list 11
R1#
R1#sh access-lists 11
Standard IP access list 11
10 permit 224.0.0.0, wildcard bits 7.255.255.255
R1#
R1#sh ip pim nei
PIM Neighbor Table
Neighbor Interface Uptime/Expires Ver DR
Address
Prio/Mode
1.1.0.2 Serial0/0.5 00:09:09/00:01:20 v2
1 / DR S
R1#
R1#sh ip pim rp map
PIM Group-to-RP Mappings
This system is an RP (Auto-RP)
R1#
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
Y - Joined MDT-data group, y - Sending to MDT-data group
Outgoing interface flags: H - Hardware switched
Timers: Uptime/Expires
Interface state: Interface, Next-Hop or VCD, State/Mode
(*, 224.0.1.39), 00:41:50/stopped, RP 0.0.0.0, flags: DC
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
Serial0/0.5, Forward/Sparse-Dense, 00:41:50/00:00:00
(1.1.1.1, 224.0.1.39), 00:41:24/00:02:35, flags: T
Incoming interface: Loopback0, RPF nbr 0.0.0.0
Outgoing interface list:
Serial0/0.5, Forward/Sparse-Dense, 00:41:24/00:00:00
(*, 224.0.1.40), 00:42:19/stopped, RP 0.0.0.0, flags: DCL
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
Serial0/0.5, Forward/Sparse-Dense, 00:41:54/00:00:00
Loopback0, Forward/Sparse-Dense, 00:42:20/00:00:00
(1.1.2.2, 224.0.1.40), 00:04:26/00:02:37, flags: LT
Incoming interface: Serial0/0.5, RPF nbr 1.1.0.3
Outgoing interface list:
Loopback0, Forward/Sparse-Dense, 00:04:26/00:00:00
R1#
-----------------------------------------
R2#sh run int ser 0/0.1
Building configuration...
Current configuration : 202 bytes
!
interface Serial0/0.1 multipoint
ip address 1.1.0.2 255.255.255.0
ip pim nbma-mode
ip pim sparse-dense-mode
frame-relay map ip 1.1.0.1 501 broadcast
frame-relay map ip 1.1.0.3 502 broadcast
end
R2#
ip pim send-rp-discovery Loopback0 scope 16
R2#sh ip pim nei
PIM Neighbor Table
Neighbor Interface Uptime/Expires Ver DR
Address
Prio/Mode
1.1.0.3 Serial0/0.1 00:06:28/00:01:31 v2
1 / DR S
1.1.0.1 Serial0/0.1 00:07:50/00:01:18 v2 1 / S
R2#
R2#sh ip pim rp map
PIM Group-to-RP Mappings
This system is an RP-mapping agent (Loopback0)
Group(s) 224.0.0.0/5
RP 1.1.1.1 (?), v2v1
Info source: 1.1.1.1 (?), elected via Auto-RP
Uptime: 00:02:29, expires: 00:02:29
Group(s) 232.0.0.0/5
RP 1.1.3.3 (?), v2v1
Info source: 1.1.3.3 (?), elected via Auto-RP
Uptime: 00:13:48, expires: 00:01:12
R2#
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
Y - Joined MDT-data group, y - Sending to MDT-data group
Outgoing interface flags: H - Hardware switched
Timers: Uptime/Expires
Interface state: Interface, Next-Hop or VCD, State/Mode
(*, 224.0.1.39), 00:30:18/stopped, RP 0.0.0.0, flags: DCL
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
Loopback0, Forward/Sparse-Dense, 00:30:18/00:00:00
Serial0/0.1, Forward/Sparse-Dense, 00:30:18/00:00:00
(1.1.1.1, 224.0.1.39), 00:09:01/00:02:59, flags: LT
Incoming interface: Serial0/0.1, RPF nbr 1.1.0.1
Outgoing interface list:
Loopback0, Forward/Sparse-Dense, 00:09:01/00:00:00
(1.1.2.2, 224.0.1.39), 00:00:25/00:02:35, flags: LT
Incoming interface: Loopback0, RPF nbr 0.0.0.0
Outgoing interface list:
Serial0/0.1, Forward/Sparse-Dense, 00:00:25/00:00:00
(*, 224.0.1.40), 00:30:19/stopped, RP 0.0.0.0, flags: DCL
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
Loopback0, Forward/Sparse-Dense, 00:30:19/00:00:00
Serial0/0.1, Forward/Sparse-Dense, 00:30:19/00:00:00
(1.1.2.2, 224.0.1.40), 00:13:09/00:02:54, flags: L
Incoming interface: Loopback0, RPF nbr 0.0.0.0
Outgoing interface list:
Serial0/0.1, Forward/Sparse-Dense, 00:12:21/00:00:00
R2#
-----------------------------------------
R3#sh run int ser 0/0
Building configuration...
Current configuration : 318 bytes
!
interface Serial0/0
ip address 1.1.0.3 255.255.255.0
ip pim sparse-dense-mode
encapsulation frame-relay
ip ospf priority 0
frame-relay map ip 1.1.0.1 201
frame-relay map ip 1.1.0.2 205 broadcast
no frame-relay inverse-arp
frame-relay lmi-type cisco
end
R3#
R3#sh ip pim nei
PIM Neighbor Table
Neighbor Interface Uptime/Expires Ver DR
Address
Prio/Mode
1.1.0.2 Serial0/0 00:13:08/00:01:17 v2 1 / S
R3#
R3#sh ip pim rp map
PIM Group-to-RP Mappings
This system is an RP (Auto-RP)
R3#
R3#sh ip pim rp map
PIM Group-to-RP Mappings
This system is an RP (Auto-RP)
R3#
R3#sh ip pim rp map
PIM Group-to-RP Mappings
This system is an RP (Auto-RP)
R3#
ip pim send-rp-announce Loopback0 scope 16 group-list 1
R3#sh access-li
R3#sh access-lists 1
Standard IP access list 1
10 permit 232.0.0.0, wildcard bits 7.255.255.255
R3#
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