Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

MULTICASTING in LAN

Hi all

Any help&suggestion will be appreciated about the multicast problem described below;

about 20 PCs are directly connected to 4503 multilayer switch (with supervisor engine II Plus TS)

and 50 PCs are connected to the same 4503 through hubs and unmanaged switches.

This is a simple LAN with one VLAN (VLAN 1)

There is no router.

There are multicasting groups.

I've read a lot of documents about multicasting but still need some help please:

1. How would multilayer switch act to multicast packets if it is not configured(if it'S default config isn't changed). Can it dynamically track (IGMP snooping perhaps?) group membership with it's default configuration?

or does it simply broadcasts the multicast to all ports.

2. What would you recommend to establish a solid, reliable multicast delivery with the actual equipment.

3. How can I configure for IGMP snooping if 4503 doesnt do it as default? (There is no router to propogate CGMP messages)

thank you very much for any suggestion.

1 REPLY
Cisco Employee

Re: MULTICASTING in LAN

1)IGMP snooping is enabled by default.

2)Enable IP multicast routing and enable PIM under VLAN 1 interface of your Sup2+

3)Its enabled by default.

The following tech tip should help as well

http://www.cisco.com/warp/public/473/cat_multicast_prob.html

http://www.cisco.com/warp/public/473/38.html

111
Views
5
Helpful
1
Replies