From: Brian Dennis (bdennis@internetworkexpert.com)
Date: Sun Jan 21 2007 - 15:24:42 ART
IGMP is a client to multicast router protocol. There isn't any
communication (i.e. via IGMP) between the multicast server and the
multicast router. The server sends multicast packets onto a segment and
that is all it's concerned with. It doesn't communicate with any
clients or routers.
You could also verify this by pinging a multicast group and debugging
mpackets on the first hop router. If there is any communication between
the server and router other than the multicast stream being sent you
would see the communication in the output of the debug.
Brian Dennis, CCIE4 #2210 (R&S/ISP-Dial/Security/SP)
bdennis@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987
Direct: 775-745-6404 (Outside the US and Canada)
-----Original Message-----
From: Phillip Day [mailto:Phillip.Day@telindus.co.uk]
Sent: Sunday, January 21, 2007 9:37 AM
To: Brian Dennis
Subject: RE: igmp join-group
BD, Please don't leave us hanging! Explain!
-----Original Message-----
From: Brian Dennis [mailto:bdennis@internetworkexpert.com]
Sent: Sunday, January 21, 2007 5:34 PM
To: Phillip Day; ccielab@groupstudy.com
Subject: RE: igmp join-group
The command 'emulates' the client. If you want to have fun with your
lab partner have your partner explain the communication, if any, between
a multicast server and a router ;-)
Brian Dennis, CCIE4 #2210 (R&S/ISP-Dial/Security/SP)
bdennis@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987
Direct: 775-745-6404 (Outside the US and Canada)
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
phillip.day@telindus.co.uk
Sent: Sunday, January 21, 2007 9:24 AM
To: ccielab@groupstudy.com
Subject: igmp join-group
I have just started labbing I've hit the MCAST section and I'm arguing
over an issue with my lab partner. Please clear it up for me. Does the
IGMP JOIN-GROUP command emulate a mcast server (like he says!) or does
it represent a client request to join the group (Like I say!) I thought
that a ping from the other end of the network represented a server.
This archive was generated by hypermail 2.1.4 : Thu Feb 08 2007 - 23:46:57 ART