From: Thomas Surber (tsurber@xxxxxxxxxxxxx)
Date: Sun Sep 10 2000 - 09:46:41 GMT-3
This is a tool I use to test my setups. It will tell you what is being
advertised and from whom, and who the issued join it from. Its from a
company called Tsunami,
http://www.hugewave.com/blackbook/lbb/download.htm its called
"mcaster"
Thomas Surber
----- Original Message -----
From: Sam Munzani
To: Geatti ; John Conzone ; ccielab
Sent: Saturday, September 09, 2000 10:21 PM
Subject: Re: multicast confusion
You are definately right on it. If you don't have a multicast
application on your segment to test your setup. You pretend that one
of the router interface is multicast client. Then ping that address
from every router running multicast routing. As many interfaces joined
that group should reply to your ping.
All you need for multicast is RP-Address and interface command to
activate a sparse or dence mode.
Sam
----- Original Message -----
From: Geatti
To: John Conzone ; ccielab
Sent: Saturday, September 09, 2000 8:54 PM
Subject: RE: multicast confusion
My understanding is that you do not need to join on an interface to
route multicasts. Just join to test the config as you mention below. I
know that I've configured it without and it works fine. I see what you
mean about Caslow's book though it does list it as one of the steps. I
say don't need it.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
John Conzone
Sent: Saturday, September 09, 2000 4:30 PM
To: ccielab
Subject: multicast confusion
I've been going over some multicast configurations and need some
clarification.
I've been configuring PIM both dense and sparse, and have used the
IP IGMP JOIN X.X.X.X command to check multicast routing, buit I didn't
think it was required to route mulitcasts to hosts off of router
interfaces.
In Caslow's book it says that IGMP JOIN must be enabled on an
interface for it to route multicast packets to hosts on that interface
who want to join a (that?) group, or that is my interpretation. The
Cisco CD examples don't show this. They have the global IP MULTICAST,
the interface PIM commands, and RP commands if neccessary.
Is the join command required to route muticasts to host off of
interfaces? Can anyone clear up my confusion, as I have not done
multicast routing out of the lab.
Thanks!
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