Catalyst Multicast VLAN Registration

Salaam,

I continue I am posting again a new Feature that i have just learned it .  (Because I reserve this Blog to post just the new features i learn in order to help me memorizing them, and also, in order to explain them as very simple than other docs..)

Today, i'm explaining the MVR : Multicast Vlan Registration !!  (this name don't make for me any sense with what the feature really do !! :-)  )

When you have an Access Layer Metro, and each Access Router has different Vlan for Multicast, thus in the aggregation layer of that Metro, it will be heavy to send multicast on every access vlan.

As a solution (without change all vlan to one vlan like 50 in IAM Metro), we can use one aggregation vlan for Multicast , and then, for every access router, configure MVR feature.

In fact, MVR feature will do the traduction between the local multicast vlan and the aggregation multicast vlan.  In fact, when the access router receive a join from his receivers (in the local vlan) , so the router transfer the Join to the Aggregation Multicast vlan.

 And also after this, it transfer the Multicast Feed from the Aggregation Vlan to the local multicast vlan…

Notes:  
+ It’s me who name it as “aggregation” vlan
+ We should mandatory disable ip multicast-routing on switch, in order to let MVR work..

Configuration

All the configuration is done on the Access Router, w e should configure following items:

> Configure MVR globally

> Configure which is the Agg Multicast VLAN

> Configure the dynamic mode of mvr (not compatible which is default one)

> Source Interface of Aggregation Multicast VLAN

> Receiver Interface toward the Receiver VLAN

!
no  ip  multicast-routing  distribution

mvr

mvr vlan 146

mvr group dynamic

!

interface  fastethernet 0/1

  mvr  type  source

interface  fastethernet 0/5

  mvr  type  receiver

!

in this case, in f0/1 we receive the Multicast on vlan 146, and in 0/5 there is receivers on vlan58, thus,  joins received in 0/5 will be transferred to 0/1, and also multicast feed received on 0/1 will be translated to 0/5.. !!