Rodriguez Alban wrote:

• Tout le monde a l'air de poster en anglais alors je fais de même ... -

Hi Alain,

I was just wondering how can I setup udpcast in order for my udp- sender to communicate with its receivers on another vlan. I am aware on the TTL need to be greater than 1. The problem is more about establishing the session. It seems the receivers and the sender are finding each others broadcasting their HELLO command on the subnet; of course these don't pass through the gateway and receivers will never see their sender. I looked at the mcast-rdv-address command line switch but I don't known how to use it : should it point to the IGMP router address ? maybe I missed something.

There are two ways to use this command line switch: 1. Supply it both on the sender and receiver, and use a multicast address (pick any, such as 235.1.2.3)

2. Use it only the receiver, and pass the sender's unicast address to it, and make sure to start receivers _after_ the sender.

However, in order to make it work correctly, you need, in both cases, to make sure that all routers on the path from sender to receiver correctly support multicast routing.

Method 2 will work even without multicast routing if there is only a single receiver.

Thanks for you help

Have a nice day Alban

Regards,

Alain