From: Huan Pham (huan.pham@valuenet.com.au)
Date: Sun Mar 30 2008 - 06:34:50 ART
Hi Vignesh,
Your issue is similar to mine few months ago. It looks like that a SW does
send initial IGMP join, and then it will eventually time out (not responding
to any further IGMP queries from upstream router. If you have an actual
host running IGMP you would not see this issue.
I suggest you to try replacing SW2 with a router as a multicast receiver,
and see if the problem gone?
Here's my original post, without having a firmed answer.
http://www.groupstudy.com/archives/ccielab/200801/msg01818.html
Cheers,
Huan
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
vignesh sethuraman
Sent: Sunday, 30 March 2008 3:06 PM
To: ccielab@groupstudy.com
Subject: unable to Ping Mutlicast address 224.5.5.5
Hello Experts,
I have a question in Multicast. I am not able to ping the multicast
address 224.5.5.5 from Sw1. Sw2 joined 224.5.5. Could you please anyone
what i am missing here.
Here is the scenario
sw1(gig 2/0/1) <-------->(fa0/0) R1 (s1/0.2)<------->(s 0/1.1) R2
(fa0/0)<------>(fa 1/0/2) SW2
Here are my configs
R1#Sh run
Building configuration...
Current configuration : 1492 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
interface Loopback0
ip address 10.10.10.10 255.255.255.0
ip pim sparse-mode
!
interface FastEthernet0/0
ip address 10.1.1.1 255.255.255.0
ip pim sparse-mode
duplex auto
speed auto
!
nterface Serial1/0
no ip address
encapsulation frame-relay
no frame-relay inverse-arp
!
interface Serial1/0.2 point-to-point
ip address 131.1.12.1 255.255.255.0
ip pim sparse-mode
!
ip pim rp-address 10.10.10.10
R1#sh ip pim neighbor
PIM Neighbor Table
Neighbor Interface Uptime/Expires Ver DR
Address Prio/Mode
131.1.12.2 Serial1/0.2 12:03:09/00:01:35 v2 1 / S
R1#sh ip pim interface
Address Interface Ver/ Nbr Query DR DR
Mode Count Intvl
Prior
131.1.12.1 Serial1/0.2 v2/S 1 30 1
0.0.0.0
10.1.1.1 FastEthernet0/0 v2/S 0 30 1 10.1.1.1
10.10.10.10 Loopback0 v2/S 0 30 1
10.10.10.10
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
(*, 224.5.5.5), 00:00:08/stopped, RP 10.10.10.10, flags: SP
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list: Null
(10.1.1.2, 224.5.5.5), 00:00:08/00:02:51, flags: PT
Incoming interface: FastEthernet0/0, RPF nbr 0.0.0.0
Outgoing interface list: Null
(*, 224.0.1.40), 12:04:48/00:02:31, RP 10.10.10.10, flags: SJCL
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
Serial1/0.2, Forward/Sparse, 12:04:49/00:03:28
R1#sh ip pim rp
Group: 224.5.5.5, RP: 10.10.10.10, next RP-reachable in 00:00:09
Group: 224.0.1.40, RP: 10.10.10.10, next RP-reachable in 00:00:14
-----------------------------------
R2;
R2#Sh run
interface Loopback0
ip address 20.20.20.20 255.255.255.0
!
interface FastEthernet0/0
ip address 20.2.2.2 255.255.255.0
ip pim sparse-mode
duplex auto
speed auto
!
interface Serial0/1
no ip address
encapsulation frame-relay
no dce-terminal-timing-enable
!
interface Serial0/1.1 point-to-point
ip address 131.1.12.2 255.255.255.0
ip pim sparse-mode
frame-relay interface-dlci 201
!
ip pim rp-address 10.10.10.10
!
R2#sh ip pim neighbor
PIM Neighbor Table
Mode: B - Bidir Capable, DR - Designated Router, N - Default DR Priority,
S - State Refresh Capable
Neighbor Interface Uptime/Expires Ver DR
Address Prio/Mode
131.1.12.1 Serial0/1.1 12:10:19/00:01:22 v2 1 / S
R2#sh ip pim interface
Address Interface Ver/ Nbr Query DR
DR
Mode Count Intvl
Prior
20.2.2.2 FastEthernet0/0 v2/S 0 30 2000
20.2.2.2
131.1.12.2 Serial0/1.1 v2/S 1 30 1
0.0.0.0
R2#sh ip pim rp
Group: 224.0.1.40, RP: 10.10.10.10, uptime 00:02:56, expires never
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
(*, 224.0.1.40), 00:08:21/stopped, RP 10.10.10.10, flags: SJPCL
Incoming interface: Serial0/1.1, RPF nbr 131.1.12.1
Outgoing interface list: Null
----------------------------------------------
SW1#sh run int giga 2/0/1
Building configuration...
Current configuration : 108 bytes
!
interface GigabitEthernet2/0/1
no switchport
ip address 10.1.1.2 255.255.255.0
no ip mroute-cache
end
------------------------------------------------
SW2#sh run int fa 1/0/2
Building configuration...
Current configuration : 135 bytes
!
interface FastEthernet1/0/2
no switchport
ip address 20.2.2.3 255.255.255.0
ip igmp join-group 224.5.5.5
no ip mroute-cache
end
SW1#p 224.5.5.5
Type escape sequence to abort.
Sending 1, 100-byte ICMP Echos to 224.5.5.5, timeout is 2 seconds:
....
SW1#
Thanks,
Vignesh
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This archive was generated by hypermail 2.1.4 : Tue Apr 01 2008 - 07:53:54 ART