Hey experts,
Looking for your recommendation for a simple multicast routing setup in VRF lite for a network with spanned layer 2 connections.
Up to now, I have only required multicast to flow within a vlan so all multicast has been managed via igmp snooping.
The network design is a collapsed core with spanned layer 2 vlansThe core acts as the sole router for routing between vlans and it has zones split using VRF lite where an external firewall does all inter VRF routing
I'm now requiring to have multicast routing between a couple vlans within the same VRF
First question, since it is a single hop, should I just use dense mode or stick with sparse mode. I am assuming to stick with sparse mode.
Here is a basic config example that I was thinking
ip vrf ZONE1 #### creating a VRF zone
ip multicast-routing vrf ZONE1 #### enabling multicast routing with Zone 1
ip pim vrf ZONE1 rp-address 10.1.10.1 ##### setting the RP for vlan 10
interface vlan 10
ip vrf forwarding ZONE1 ### adding vlan 10 to VRF Zone 1
ip address 10.1.10.1 255.255.255.0
ip pim sparse-mode #### enabling multicast routing for vlan 10 within zone 1
interface vlan 20
ip vrf forwarding ZONE1 ### adding vlan 20 to VRF Zone 1
ip address 10.1.20.1 255.255.255.0
ip pim sparse-mode #### enabling multicast routing for vlan 20 within zone 1
Does this look correct or is there anything you will change?
To confirm,
- interfaces that I do not run the command
ip pim sparse-mode
will not participate in multicast routing (only layer 2 multicast)
- Running these same commands for a vrf ZONE2 will have the same effect on VRF zone2 however zone 1 and zone 2 will have no knowledge or routing between each other (they remain segregated)
- All the layer 2 multicast will remain functioning as is via igmp snooping
Thank you so much for your help
truly appreciated!
