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

When IP Loopback as multicast anchor point

When IP Loopback address is configured as IP multicast anchor point? I am configuring a Cisco 4500E series switch.                  

3 REPLIES
Hall of Fame Super Blue

When IP Loopback as multicast anchor point

Not clear on what you are asking.

If you are using PIM sparse mode then you need to configure an RP and Cisco recommend using a loopback IP address for this.

If you are using PIM dense mode there is no need for an RP.

Jon

New Member

Re: When IP Loopback as multicast anchor point

Hi John,

I was checking the config of the old switch before create the new config.  below config was there:

interface looback1

description IP Multicast anchor point

ip address x.x.x.x x.x.x.x

ip pim sparse-dense-mode

Do you think the RP is defined here?

Hall of Fame Super Blue

When IP Loopback as multicast anchor point

Sugata

Yes, i suspect that IP is being used as the RP.

If you do a "sh ip pim rp mapping" that should show you the RP address.

Jon

192
Views
0
Helpful
3
Replies