Multicast over VPN

[spr41178]

Good afternoon,

I have an IPSEC VPN set with policies between branch and home with rb4011 on either side.

The VPN works great no problems whatsoever, pings, web interfaces on either sides.

SITE A NETWORK IS 192.168.0.0/24
SITE B NETWORK IS 192.168.5.0/24

I am trying to get a lan messenger to work through the VPN but can’t see remote pc’s on it?
Shouldn’t that work since my laptop on the 5.0/24 side is part of the 0.0/24 side?

Any help will be appreciated

[spr41178]

Anyone?

[pe1chl]

You cannot do multicast over such a setup.
You can either use tunnel interfaces (like GRE or IPIP) with IPsec protection and use multicast routing (when you can get it to work for this application),
or you can use EoIP to join the two networks at L2 level (so they need to use the same subnet addresses as well) and all multicast and broadcast will work.

Alternatively, you can check if your application can work without multicast, e.g. using a local agent on each side to forward information collected using local broadcast.
(this is the method used for disk shares, for example)

[spr41178]

You cannot do multicast over such a setup.
You can either use tunnel interfaces (like GRE or IPIP) with IPsec protection and use multicast routing (when you can get it to work for this application),
or you can use EoIP to join the two networks at L2 level (so they need to use the same subnet addresses as well) and all multicast and broadcast will work.

Alternatively, you can check if your application can work without multicast, e.g. using a local agent on each side to forward information collected using local broadcast.
(this is the method used for disk shares, for example)

Thank you very much pe1chl - Will look into it