RE: Verifying SSM

I was just going to reply to this that I think I am wrong and will have to
update that blog. Thanks for correcting me.

Regards,
 
Tyson Scott - CCIE #13513 R&S, Security, and SP

-----Original Message-----
From: John Neiberger [mailto:jneiberger_at_gmail.com]
Sent: Wednesday, March 09, 2011 1:41 PM
To: Tyson Scott
Cc: Rich Collins; ccielab_at_groupstudy.com
Subject: Re: Verifying SSM

On Wed, Mar 9, 2011 at 2:26 PM, Tyson Scott <tscott_at_ipexpert.com> wrote:
> Um,
>
> Ping doesn't work. I have a blog write up here. Unfortunately you need
> external tools to do this unless MRM supports it, I wasn't able to get it
to
> work when I tried but I could have had an error.
>
> http://blog.ipexpert.com/2011/02/09/testing-source-specific-multicast/
>
> Regards,
>
> Tyson Scott - CCIE #13513 R&S, Security, and SP
> Managing Partner / Sr. Instructor - IPexpert, Inc.

It does work, but it's tricky. You have to make sure the source
address you're pinging from is the same as the source that is being
joined. I just tried it. On one router I have "ip igmp join-group
232.3.3.3 source 10.1.45.1" configured. From a different router in the
same VRF, I did the following:

R4#ping vrf Orange ip
Target IP address: 232.3.3.3
Repeat count [1]:
Datagram size [100]:
Timeout in seconds [2]:
Extended commands [n]: y
Interface [All]: fastethernet0/0.1
Time to live [255]:
Source address: 10.1.45.1
Type of service [0]:
Set DF bit in IP header? [no]:
Validate reply data? [no]:
Data pattern [0xABCD]:
Loose, Strict, Record, Timestamp, Verbose[none]:
Sweep range of sizes [n]:
Type escape sequence to abort.
Sending 1, 100-byte ICMP Echos to 232.3.3.3, timeout is 2 seconds:
Packet sent with a source address of 10.1.45.1

Reply to request 0 from 10.1.31.2, 92 ms
R4#

HTH,
John

Blogs and organic groups at http://www.ccie.net
Received on Wed Mar 09 2011 - 13:45:02 ART