From: Snow, Tim (timothy.snow@eds.com)
Date: Wed Oct 08 2003 - 00:40:01 GMT-3
The "ip igmp join-group" tells the router to process multicast packets
designated to that address which is why you'll receive a reply to that ping.
Apply it anywhere you want, I typically applied it on the Ethernet interface
to simulate where a true receiver would be.
The "ip igmp static-group" tells the router to forward multicast packets on
that link as if it heard an IGMP join on that interface. The router doesn't
process the multicast messages send to that address itself (ie ping won't
work) but merely sends it out that interface.
Tim
#12042
-----Original Message-----
From: Paul Chen [mailto:cpjchen@starhub.net.sg]
Sent: Tuesday, October 07, 2003 11:27 PM
To: ccielab@groupstudy.com
Subject: Multicast- igmp
Hi Everyone,
Am I right in saying that ip igmp join-group should only be applied to
Ethernet interfaces and not serial interfaces ?
I get confused when I see posted solutions for some labs with ip igmp
join-group applied to serial interfaces, my understanding of igmp is that it
permits hosts to communicate with multicast routers.
Thanks,
Paul
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