GroupStudy.com GroupStudy.com - A virtual community of network engineers
 Home  BookStore  StudyNotes  Links  Archives  StudyRooms  HelpWanted  Discounts  Login
RE: Debug PIM [7:87496] posted 04/20/2004
[Chronological Index] [Thread Index] [Top] [Date Prev][Date Next] [Thread Prev][Thread Next]


Make sure that the IP address of the interface closest to the source
(the IP Multicast server) has an IP address that is higher than the
interface closest to the IP Multicast destination (client).  If you
don't, then the the join will occur but the client subnet will not
respond to the group's query of whether any clients are listening for IP
Multicast traffic which in turn causes the prune to be initiated.


-----Original Message-----
From: alaerte Vidali [mailto:nobody@xxxxxxxxxxxxxx] 
Sent: Tuesday, April 20, 2004 1:58 PM
To: cisco@xxxxxxxxxxxxxx
Subject: Debug PIM [7:87496]


Any help to undertand the following debug result and if it is the normal
behavior?

The network is the one at
http://www.cisco.com/en/US/tech/tk828/tk363/technologies_white_paper0918
6a00800d6b61.shtml#xtocid3

C and A joined group 228.1.1.1.  A router connected to B's ethernet is
sending traffic (ping) to the group.  It is receiving answer from A but
not from C.  It does receive few answers from C, until B sends prune to
A.

#sh deb
IP multicast:
  PIM debugging is on

A#sh logg
Syslog logging: enabled (0 messages dropped, 1 messages rate-limited, 0
flushes, 0 overruns)
    Console logging: disabled
    Monitor logging: level debugging, 0 messages logged
    Buffer logging: level debugging, 11959 messages logged
    Logging Exception size (4096 bytes)
    Trap logging: level informational, 37 message lines logged

Log Buffer (4096 bytes):
.125.2
*Mar  1 20:50:13.154: PIM: Received v2 Hello on Serial0/0 from
150.20.125.1 *Mar  1 20:50:22.946: PIM: Send RP-reachability for
228.1.1.1 on Serial0/0 *Mar  1 20:50:22.946: PIM: Send RP-reachability
for 228.1.1.1 on Serial0/0 *Mar  1 20:50:26.946: PIM: Send v2 Hello on
Loopback0 *Mar  1 20:50:26.946: PIM: Received v2 Hello on Loopback0 from
150.20.5.5 *Mar  1 20:50:30.946: PIM: Send v2 Hello on Serial0/0 *Mar  1
20:50:41.474: PIM: Received v2 Hello on Serial0/0 from 150.20.125.2 *Mar
1 20:50:41.474: PIM: Received v2 Hello on Serial0/0 from 150.20.125.2
*Mar  1 20:50:43.154: PIM: Received v2 Hello on Serial0/0 from
150.20.125.1 *Mar  1 20:50:47.454: PIM: Received v2 Join/Prune on
Serial0/0 from 150.20.125.2, to us *Mar  1 20:50:47.458: PIM:
Prune-list: (150.20.5.5/32, 224.0.1.39) *Mar  1 20:50:52.970: PIM:
Building Join/Prune message for 228.1.1.1 *Mar  1 20:50:56.970: PIM:
Send v2 Hello on Loopback0 *Mar  1 20:50:56.970: PIM: Received v2 Hello
on Loopback0 from 150.20.5.5 *Mar  1 20:51:00.970: PIM: Send v2 Hello on
Serial0/0 *Mar  1 20:51:11.474: PIM: Received v2 Join/Prune on Serial0/0
from 150.20.125.2, to us *Mar  1 20:51:11.478: PIM: Join-list: (*,
228.1.1.1) RP 150.20.5.5, RPT-bit set, WC-bit set, S-bit set *Mar  1
20:51:11.478: PIM: Add Serial0/0/150.20.125.2 to (*, 228.1.1.1), Forward
state *Mar  1 20:51:11.490: PIM: Received v2 Hello on Serial0/0 from
150.20.125.2 *Mar  1 20:51:11.490: PIM: Received v2 Hello on Serial0/0
from 150.20.125.2 *Mar  1 20:51:13.226: PIM: Received v2 Hello on
Serial0/0 from 150.20.125.1 *Mar  1 20:51:26.970: PIM: Send v2 Hello on
Loopback0 *Mar  1 20:51:26.970: PIM: Received v2 Hello on Loopback0 from
150.20.5.5 *Mar  1 20:51:30.970: PIM: Send v2 Hello on Serial0/0 *Mar  1
20:51:41.618: PIM: Received v2 Hello on Serial0/0 from 150.20.125.2 *Mar
1 20:51:41.618: PIM: Received v2 Hello on Serial0/0 from 150.20.125.2
*Mar  1 20:51:43.198: PIM: Received v2 Hello on Serial0/0 from
150.20.125.1 *Mar  1 20:51:47.230: PIM: Received v2 Join/Prune on
Serial0/0 from 150.20.125.1, to us *Mar  1 20:51:47.230: PIM:
Prune-list: (150.20.5.5/32, 224.0.1.39) *Mar  1 20:51:47.934: PIM:
Received v2 Register on Serial0/0 from 150.20.125.1
*Mar  1 20:51:47.934:      for 150.20.13.3, group 228.1.1.1
*Mar  1 20:51:47.938: PIM: Send v2 Join on Serial0/0 to 150.20.125.1 for
(150.20.13.3/32, 228 .1.1.1), S-bit *Mar  1 20:51:47.942: PIM: Forward
decapsulated data packet for 228.1.1.1 on Serial0/0 *Mar  1
20:51:47.942: PIM: Forward decapsulated data packet for 228.1.1.1 on
Serial0/0 *Mar  1 20:51:47.966: PIM: Received v2 Join/Prune on Serial0/0
from 150.20.125.2, to us *Mar  1 20:51:47.966: PIM: Prune-list:
(150.20.13.3/32, 228.1.1.1) RPT-bit set *Mar  1 20:51:48.230: PIM:
Received v2 Register on Serial0/0 from 150.20.125.1 *Mar  1
20:51:48.230: PIM: Send v2 Register-Stop to 150.20.125.1 for 0.0.0.0,
group 0.0.0.0 *Mar  1 20:51:49.938: PIM: Received v2 Register on
Serial0/0 from 150.20.125.1
*Mar  1 20:51:49.938:      for 150.20.13.3, group 228.1.1.1
*Mar  1 20:51:49.938: PIM: Send v2 Join on Serial0/0 to 150.20.125.1 for
(150.20.13.3/32, 228 .1.1.1), S-bit *Mar  1 20:51:49.938: PIM: Forward
decapsulated data packet for 228.1.1.1 on Serial0/0 *Mar  1
20:51:49.942: PIM: Forward decapsulated data packet for 228.1.1.1 on
Serial0/0 *Mar  1 20:51:51.942: PIM: Received v2 Register on Serial0/0
from 150.20.125.1
*Mar  1 20:51:51.942:      for 150.20.13.3, group 228.1.1.1
*Mar  1 20:51:51.942: PIM: Send v2 Register-Stop to 150.20.125.1 for
150.20.13.3, group 228.1 .1.1 *Mar  1 20:51:52.994: PIM: Send
RP-reachability for 228.1.1.1 on Serial0/0 *Mar  1 20:51:52.994: PIM:
Send RP-reachability for 228.1.1.1 on Serial0/0 *Mar  1 20:51:52.994:
PIM: Building Join/Prune message for 228.1.1.1 *Mar  1 20:51:52.998:
PIM: For 150.20.125.1, Join-list: 150.20.13.3/32 *Mar  1 20:51:52.998:
PIM: Send v2 periodic Join/Prune to 150.20.125.1
(Serial0/0)
*Mar  1 20:51:56.994: PIM: Send v2 Hello on Loopback0
*Mar  1 20:51:56.994: PIM: Received v2 Hello on Loopback0 from
150.20.5.5 *Mar  1 20:52:00.994: PIM: Send v2 Hello on Serial0/0


This is the result of the ping to group 228.1.1.1 from a router
connected to router B.

Reply to request 0 from 150.20.125.2, 80 ms
Reply to request 1 from 150.20.125.5, 64 ms
Reply to request 1 from 150.20.125.2, 76 ms
Reply to request 2 from 150.20.125.5, 104 ms
Reply to request 3 from 150.20.125.5, 40 ms
Reply to request 2 from 150.20.125.5, 104 ms
Reply to request 3 from 150.20.125.5, 40 ms
Reply to request 2 from 150.20.125.5, 104 ms
Reply to request 3 from 150.20.125.5, 40 ms
Reply to request 2 from 150.20.125.5, 104 ms
Reply to request 3 from 150.20.125.5, 40 ms
Reply to request 2 from 150.20.125.5, 104 ms
Reply to request 3 from 150.20.125.5, 40 ms
Reply to request 2 from 150.20.125.5, 104 ms
Reply to request 3 from 150.20.125.5, 40 ms
Reply to request 2 from 150.20.125.5, 104 ms
Reply to request 3 from 150.20.125.5, 40 ms
**Please support GroupStudy by purchasing from the GroupStudy Store:
http://shop.groupstudy.com FAQ, list archives, and subscription info:
http://www.groupstudy.com/list/cisco.html




Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=87497&t=87496
--------------------------------------------------
**Please support GroupStudy by purchasing from the GroupStudy Store:
http://shop.groupstudy.com
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html