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. And see here for current known issues.

New Member

3750 & duplicate multicast flow

Hi,

I have one 3750 with the SMI version and need to duplicate a Multicast flow twice without any routing feature. Is the SMI version sufficient ?

I have about 400 Mbps of incoming payload .

I already created a trunk with .1Q encapsulation.

Thx

4 REPLIES
Silver

Re: 3750 & duplicate multicast flow

You can have multicasting in a single vlan so long as you have an IGMP querier in the vlan. When you enable multicast routing and PIM on a vlan interface , the querier functionality becomes available , but since you have SMI switch and cannot run Mcast routing or PIM , you can just enable IGMP querier . IGMP querier feature is in SMI codes starting from 12.2(25)SEA

http://www.cisco.com/univercd/cc/td/doc/product/lan/cat3750/12225sea/3750scg/swigmp.htm#wp1187873

And as long as your end host supports IGMP , this config should work . If they do not support IGMP , you may have to add manual entries to enable the multicast flow forwarding.

thanks

Salman Z.

New Member

Re: 3750 & duplicate multicast flow

Thx for your reply

In fact, just before the 3750 i have a product generating Multicast flow (with a Vlan tag - up to 100 IP Multicast so 1 IP = 1 vlan_id).

For the configuration, i only created a trunk (with .1Q encapsulation) on the Giga incoming & on both Giga outputs and added extended vlan range. It's a really simple application to duplicate 2 flows.

Therefore, i understood the configuration should be working with the SMI

By default, IGMP querier is enabled ?

Thx again

Best regards,

Silver

Re: 3750 & duplicate multicast flow

IGMP querier is not enabled by default.

thanks

Salman Z.

New Member

Re: 3750 & duplicate multicast flow

Just to be sure with my configuration. Could you confirm me if it will be working with SMI ?

I have attached a file with the configuration.

Of course, i did not enter the vlan because the device before the 3750, already create the vlan

Thx

Have a nice day

131
Views
0
Helpful
4
Replies