Routing configuration to forward multicast traffic to a tunnel interface

[Luca_Spinacci]

Hi all,

I have a L3 network topology where the core network segment doesn't support IP Multicast protocols.

As such, I have configured a couple of X460 switches/routers in order to provide an end-to-end GRE tunnel able to encapsulate Multicast traffic without the need for IGMP/PIM (no control on the core network routers).

I expected to force Multicast traffic to be routed through the GRE tunnel interface by configuring a route in a similar way I'm used to do with Linux, e.g.:

add route -net 239.0.0.0 netmask 224.0.0.0 dev my_tunnel_gre

Unfortunately, I haven't found a command in the manual to configure such a route on ExtremeOS.

Does anyone have any idea how to achieve such a behavior?

I appreciate any answers able to solve the above issue.

Thank you.

RB,

Luca.

[Kawawa]

Hi Luca, I don't think EXOS allows you to specify a Class D address in a route. I'll need to verify that. However, you can add a multicast route to the routing table using the following command:
configure iproute add multicast
configure iproute add 70.0.0.0/24 70.0.0.254 multicastThis tells the router to forward all mutlicast streams originating from the 70.0.0.0 subnet via the interface 70.0.0.254, which would be the destination address of your GRE tunnel. And because, this is a static route, it will have precedence over any dynamic routes that may exist to the same destination.

I hope this is what you're looking to implement