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

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

is it possible to create two multicast DR on the same subnet?

on server vlan, there are two routers:

R1 is .2 and R2 is .3 with "IP pim sparse-mode" enabled.

R1 and R2 are on two distinct Mcast domains

R1 has

ip pim rp-address acl-one override

R2 has

ip pim rp-address acl-two override

The problem is R2 with higher IP address is now the IGMP and PIM DR. Any multicast app with RP is NOT working because R1 can't receive IGMP join from servers.

In addition, R1 by design can not reach and same for R2 to reach

Thus configuring two "IP PIM rp-address" is not possible

how can I make R1 the DR for group IP under acl-one and R2 for group IP acl-two?

or I have to change network topology?


Re: is it possible to create two multicast DR on the same subnet

There can be only one DR on a the same subnet.If there are more than one DR on the same subnet it would endup sending duplicate multicast traffic for connected host.For more information refer the URL

CreatePlease login to create content