From: Padhu (LFG) (padhu@xxxxxxxxxxxx)
Date: Wed Aug 08 2001 - 15:12:34 GMT-3
R8 is connected to R1 via ethernet. R8 is a stub net..doesn't have any other
active interfaces.
R3 is connected to R5 on serial ppp and its ethernet has 224.3.3.3.
Sparse-dense on all routers.
all hub and spoke igmp groups are pingable fine. It is the 2 stub routers R3
and R8 thats having problems.
R1#sh ip pim nei
PIM Neighbor Table
Neighbor Address Interface Uptime Expires Ver Mode
172.16.40.168 Ethernet0 17:53:57 00:01:02 v1 Sparse-Dense
(DR)
172.16.30.85 Serial0.2 00:50:49 00:01:30 v2
(DR)
172.16.30.84 Serial0.2 00:50:49 00:01:29 v2
172.16.50.66 Serial1 21:54:40 00:01:44 v2
R1#sh ip pim int
Address Interface Version/Mode Nbr Query DR
Count Intvl
172.16.40.161 Ethernet0 v2/Sparse-Dense 1 30
172.16.40.168
172.16.1.1 Loopback0 v2/Sparse-Dense 0 30 172.16.1.1
172.16.30.81 Serial0.2 v2/Sparse-Dense 2 30
172.16.30.85
172.16.50.65 Serial1 v2/Sparse-Dense 1 30 0.0.0.0
R1#sh ip pim rp
Group: 225.1.1.1, RP: 172.16.30.81, v2, v1, next RP-reachable in 00:00:03
Group: 224.1.1.1, RP: 172.16.30.81, v2, v1, next RP-reachable in 00:00:49
Group: 224.3.3.3, RP: 172.16.30.81, v2, v1, next RP-reachable in 00:01:06
Group: 224.4.4.4, RP: 172.16.30.81, v2, v1, next RP-reachable in 00:00:11
Group: 224.5.5.5, RP: 172.16.30.81, v2, v1, next RP-reachable in 00:00:30
Group: 224.7.7.7, RP: 172.16.30.81, v2, v1, next RP-reachable in 00:00:49
Group: 224.8.8.8, RP: 172.16.30.81, v2, v1, next RP-reachable in 00:00:49
Group: 224.9.9.9, RP: 172.16.30.81, v2, v1, next RP-reachable in 00:01:06
Group: 224.11.11.11, RP: 172.16.30.81, v2, v1, next RP-reachable in 00:00:49
R1#
I infact rebooted R8 and R3 when things were not working.
Cheers,Padhu
-----Original Message-----
From: Daniel C. Young [mailto:danyoung99@mediaone.net]
Sent: Wednesday, August 08, 2001 1:01 PM
To: 'Padhu (LFG)'; 'Daniel C. Young'; ccielab@groupstudy.com
Subject: RE: Multicasting problem
Check the RPF interface. Make sure that they are coming from the right
source. You might have a problem here since you a hub-spoke topology;
remember that PIM routers will not forward traffic toward its RPF interface.
Your null o-list should give you clues.
Are you using sparse-dense? R8's OIL is null, and (*,G) entry has been
pruned. Make sure that you've also enabled pim on the joining interfaces.
Verify that igmp joins are being received and that the proper (*,G) entries
have been created.
If after you've made changes and are still not getting the correct states on
the mroute table, do a 'clear ip mroute *'. Also, can you post R1's configs
as well?
Regards,
Daniel
-----Original Message-----
From: Padhu (LFG) [mailto:padhu@steinroe.com]
Sent: Wednesday, August 08, 2001 10:49 AM
To: 'Daniel C. Young'; 'ccielab@groupstudy.com'
Subject: Multicasting problem
I have the following topology :
igmp join groups on all ethernets.
running sparse dense all over with RP nailed at R1
Pings between R1,R4,R5,R7 work with no problems.
However R8 cannot ping R1(224.1.1.1) but can ping everything else
problem with R3 also. All routers can ping R3(224.3.3.3) but R3 cannot ping
any groups
No access-lists no multicast boundaries...wide open as an ocean
Only weird thing is that R8 and R3 are the only routers with 11.2 . Rest of
the net is 12.0
224.8.8.8 224.1.1.1 224.7.7.7
R8---------------R1-------------------R7
/ \
/ \
R4 R5----------------R3
224.4.4.4 224.5.5.5 224.3.3.3
Configs:
R3#ping 224.5.5.5
Type escape sequence to abort.
Sending 1, 100-byte ICMP Echos to 224.5.5.5, timeout is 2 seconds:
*Mar 6 22:35:24.428 UTC: IP: s=172.16.5.5 (Tunnel35) d=224.0.1.39 len 48,
mroute
olist null
*Mar 6 22:35:25.732 UTC: IP: s=170.100.1.1 (Ethernet0) d=224.5.5.5 len 114,
mro
ute olist null
*Mar 6 22:35:25.736 UTC: IP: s=172.16.3.3 (Loopback0) d=224.5.5.5 len 100,
mrout
ing interface disabled.
R3#
*Mar 6 22:35:31.872 UTC: IP: s=172.16.30.81 (Tunnel35) d=224.0.1.39 len 48,
mrou
te olist null
R3#sh ip mroute 224.5.5.5
IP Multicast Routing Table
Flags: D - Dense, S - Sparse, C - Connected, L - Local, P - Pruned
R - RP-bit set, F - Register flag, T - SPT-bit set, J - Join SPT
Timers: Uptime/Expires
Interface state: Interface, Next-Hop, State/Mode
(*, 224.5.5.5), 00:02:53/00:02:58, RP 172.16.30.81, flags: SPF
Incoming interface: Tunnel35, RPF nbr 172.16.60.130, Mroute
Outgoing interface list: Null
(170.100.1.1/32, 224.5.5.5), 00:02:53/00:00:06, flags: PFT
Incoming interface: Ethernet0, RPF nbr 0.0.0.0, Registering
Outgoing interface list: Null
R3#
*Mar 6 22:36:38.112 UTC: IP: s=172.16.7.7 (Tunnel35) d=224.0.1.39 len 48,
mroute
olist null
R3#show ip rpf
*Mar 6 22:36:46.016 UTC: IP: s=172.16.1.1 (Tunnel35) d=224.0.1.40 len 48,
mroute
olist null
*Mar 6 22:36:46.116 UTC: IP: s=172.16.1.1 (Tunnel35) d=224.0.1.40 len 48,
mroute
olist null172.16.60.130
RPF information for ? (172.16.60.130)
RPF interface: Tunnel35
RPF neighbor: ? (172.16.60.130)
RPF route/mask: 172.16.60.130/255.255.0.0
RPF type: static mroute
ip mroute 172.16.0.0 255.255.0.0 Tunnel35
R3#mrinfo
170.100.1.1 [version cisco 11.2] [flags: PMA]:
170.100.1.1 -> 0.0.0.0 [1/0/pim/querier/leaf]
170.100.1.1 -> 172.16.60.130 [1/0/tunnel/pim/querier]
----------------------------------------------------------------------------
-------------------
R8#sh ip mroute 224.1.1.1
IP Multicast Routing Table
Flags: D - Dense, S - Sparse, C - Connected, L - Local, P - Pruned
R - RP-bit set, F - Register flag, T - SPT-bit set, J - Join SPT
Timers: Uptime/Expires
Interface state: Interface, Next-Hop, State/Mode
(*, 224.1.1.1), 00:14:32/00:02:22, RP 172.16.30.81, flags: SJPC
Incoming interface: Ethernet0, RPF nbr 172.16.40.161
Outgoing interface list: Null
R8#deb
R8#debug ip mpac
IP multicast packets debugging is on
R8#ping 224.1.1.1
Type escape sequence to abort.
Sending 1, 100-byte ICMP Echos to 224.1.1.1, timeout is 2 seconds:
.
R8#
*Mar 1 00:16:18.568 UTC: IP: s=172.16.40.168 (Ethernet0) d=224.1.1.1 len
114, mr
oute olist null
*Mar 1 00:16:18.572 UTC: IP: s=172.16.8.8 (Loopback0) d=224.1.1.1 len 100,
mrout
ing interface disabled
R8#
R8#mrinfo
172.16.100.8 [version cisco 11.2] [flags: PMA]:
172.16.40.168 -> 172.16.40.161 [1/0/pim/querier]
172.16.100.8 -> 0.0.0.0 [1/0/pim/leaf]
----------------------------------------------------------------------------
--------------------
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