Vlan to Vlan Multicast in redondant L3 core campus

[jcazenave]

If i configure the inter vlan multicast routing in the 2 L3, the multicast trafic is duplicated in the client vlan.

How can i configure the redondant multicast routing ?

ip multicast-routing enable at the general level

ip PIM dense mode enable in all the vlan interface level

[bharath.mallik]

ip pim sparse-dense-mode

ip pim version 1

u enable all this commands also.

[sphillip]

Hi,

Close!

The thing to remember with IP Multicast is that it is UDP based and the behavious of dense mode will cause duplicate packets every ~3 minutes or so due to the flood and prune, and assert processes.

You need to configure the following to use sparse mode

interface

ip pim spase-dense-mode

On two routers, near the source is OK configure these commands

ip pim send-rp-announce scope 16 source loopback 0

ip pim send-rp-discover scope 16

These will cause the forwarding to use sparse-mode forwarding and duplicates will be significantly reduced, but not eliminated (you may see a handful, but that will be about it).

HTH - if you need any help email stevep@cisco.com