Multicasting on same port

[ambeer]

So on server i run few multicast streams, for example these three:
239.255.255.255:1234
239.255.255.254:1234
239.255.255.253:1234

and on client computer when i run one instance of vlc player, i succesful open one stream of these (for ex. 239.255.255.255:1234), but when i try launch another instance of vlc player and run another (for example 239.255.255.254:1234) i hafve an error "unable to connect"..

if i try to do this with same addresses but diffrent ports, for example:
239.255.255.255:1234
239.255.255.254:1235
239.255.255.253:1236

it works fine!

is it normaly that i can play only one stream through one slot?


thanks for answers

[robert.mil]

I tried to run same IP and different port and everything was OK. I also tried different IP, same port and it is working again. Maeby any network problem?

[cemiaph]

If your running a firewall or nat router you cannot use the same port