RE: Multicast Problem

From: Mark Stephanus Chandra (mark.chandra@gmail.com)
Date: Thu Jul 03 2008 - 03:32:54 ART


I did, with ip nbma-mode, anyway I am using IP PIM Sparse-dense-mode so I
guess it is not necessary to activate nbma-mode feature right ?

 

Reards

 

Mark Stephanus Chandra
IT Consultant

From: Jason Madsen [mailto:madsen.jason@gmail.com]
Sent: 03 Juli 2008 12:08
To: Mark Stephanus Chandra
Cc: SAM Meng Wai; ccielab@groupstudy.com
Subject: Re: Multicast Problem

 

I didn't look at your complete set of config's, but seeing that your
disconnect is across a frame link you may want to try using "ip pim
nbma-mode" (both ends of frame link).

Jason

On Wed, Jul 2, 2008 at 7:03 PM, Mark Stephanus Chandra
<mark.chandra@gmail.com> wrote:

I Have Check it, no problem with rpf.

Just to make it clear, rpf is considered okay if the incoming packet from r1
to sw2 must be go out back with the sam interface right ?

Regards

Mark Stephanus Chandra
IT Consultant

-----Original Message-----
From: SAM Meng Wai [mailto:mwsam@starhub.com]
Sent: 03 Juli 2008 5:38
To: Mark Stephanus Chandra
Subject: RE: Multicast Problem

Hi,

Can you check SW2 for any rpf issue to R1 source IP addresss ?

Rgds

________________________________

From: nobody@groupstudy.com on behalf of Mark Stephanus Chandra
Sent: Thu 7/3/2008 1:47 AM
To: ccielab@groupstudy.com
Subject: Multicast Problem

Hi all,

I have a question About Multicast

Topology :

R1-----FRAME RELAY Point to Point ------R3----ethernet---SW2---ethernet ip
igmp join group 239.23.23.23

R3 is the autorp and the mapping agent.

I can do ping from R3 to the group 239.23.23.23

But I cannot ping it from 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, 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

(*, 239.23.23.23), 00:01:07/stopped, RP 150.1.3.3, flags: SP

 Incoming interface: Serial1/0, RPF nbr 162.1.13.3

 Outgoing interface list: Null

(162.1.13.3, 239.23.23.23), 00:01:07/00:01:54, flags: PT

 Incoming interface: Serial1/0, RPF nbr 0.0.0.0

 Outgoing interface list: Null

(*, 224.0.1.39), 01:43:48/stopped, RP 0.0.0.0, flags: DC

 Incoming interface: Null, RPF nbr 0.0.0.0

 Outgoing interface list:

   Serial1/0, Forward/Sparse-Dense, 01:43:48/00:00:00

(150.1.3.3, 224.0.1.39), 00:02:34/00:00:25, flags: PT

 Incoming interface: Serial1/0, RPF nbr 162.1.13.3

 Outgoing interface list: Null

(*, 224.0.1.40), 01:44:28/stopped, RP 0.0.0.0, flags: DCL

R1#sh ip pim rp

Group: 239.23.23.23, RP: 150.1.3.3, v2, v1, uptime 01:38:37, expires
00:02:17

R1#ping 239.23.23.23

Type escape sequence to abort.

Sending 1, 100-byte ICMP Echos to 239.23.23.23, timeout is 2 seconds:

.

R1#

R1#mtrace 162.1.13.1 239.23.23.23

Type escape sequence to abort.

Mtrace from 162.1.13.1 to 162.1.13.1 via group 239.23.23.23

From source (?) to destination (?)

Querying full reverse path... * switching to hop-by-hop:

 0 162.1.13.1

-1 * * * Timed out receiving responses

Perhaps no local router has a route for source, the receiver is not

a member of the multicast group or the multicast ttl is too low.

Can you guys figure it out why I cannot ping the group address

Mark Stephanus Chandra
IT Consultant



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