Mitch,
See Inline...
----- Original Message -----
From: "Eve Mitch"
To:
Sent: Saturday, February 02, 2002 7:18 AM
Subject: Multicast in catalyst 6500 environment [7:34192]
> Hi all,
>
> Have 2 Catalyst 6509 with sup2 and MSFC2 modules in each switch in the
core.
> And 4 Catalyst 6509 with sup2 in the access layer.
> Have about 10 VLAN using using ISL. There is a multicast server connecte
to
> vlan 10 on CoreSwitch1.
>
> Is using pim dense mode on the MSFC2 and igmp snooping enable on all sup2
> modules enough to allow PC1 connected to one of the
> access switches (AS1) in vlan 2 to receive multicast,or is CGMP
> configuration nececary?
In a most recent thread (thanks Mike, Priscilla) I personally have been
motivated to improve my understanding of multicast. Based on what you've
mentioned since you have IGMP snooping enabled
this would allow the switch to "snoop" on IGMP messages between the MSFC2
and any host
Basically, as I understand it..IGMP and CGMP are mechanisms that provide
similar control over
the flooding of multicast traffic. The difference is that with CGMP, is the
MSFC is now able to speak directly to the sup2 providing information about
which ports will receive the multicast
>
> I don't want that if one user in vlan 2 is receiving multicast that all
> these multicast stream also past the trunks to AS2,AS3 and AS4.
> Is there a way to prevent this.
In using dense-mode PIM this is the desired/normal behavior. If you're
interested in limiting who and where the multicast traffic should
sent/forwarded, maybe you should look at sparse-mode PIM.
>
> Any url or documentation where this issue are discussed clearly are
> appreciated.
http://www.cisco.com/warp/public/473/22.html#IGMP%20%Snooping
http://www.cisco.com/pcgi-bin/Support/PSP/psp_view.pl?p=Internetworking:Mult
icast&s=Implementation_and_Configuration#Samples_%26_Tips
watch the word wrap..
HTH
Nigel
>
> Thanks for your help.
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=34196&t=34192
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