From: Brown, Patrick (NSOC-OCF} (PBrown4@chartercom.com)
Date: Tue Aug 12 2003 - 21:55:37 GMT-3
If I understand you correctly, R8 has a multicast source attached to its
ethernet interface. If it is the mcast source, it is just sending out
packets destined to 224.88.88.88. The upstream router(one with
neighbor-filter) will forward the register to the RP. Now, the host that's
joining this group(224.88.88.88) will be the destination for these
packets.You use the "ip igmp join-group" when you want to pull multicast
onto that subnet. But in this case r8 is the sender, and not the receiver.
HTH
Patrick B
-----Original Message-----
From: Jason Cash
To: ccielab@groupstudy.com
Sent: 8/12/2003 7:39 PM
Subject: Multicast testing etc
I am doing an IPE lab that staes that R8 will be a multicast stub router
and
has a source connected to it's Eth interface @ 224.88.88.88. However,
nowhere in the lab is a ip igmp join placed on any router. Without
this,
would hosts be able to join that group. I know I will be unable to ping
the
IP, but would this affect the hosts trying to join if no routers had
'igmp
join' for that group?
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