I'm seeing some serious multicast cross-talk a.k.a "promiscuous traffic" (which is not promiscuous mode, see on wikipedia
Can anybody confirm this problem ? here's how :
Given the 2 rudimentary programs (attached) : mcsend.c and mcreceive.c (of course you have to compile them: just do gcc -o mcsend mcsend.c
and gcc -o mcreceive mcreceive.c
) , open 3 terminal windows A, B and C.
- in terminal A , type: mcreceive 188.8.131.52 21002
- in terminal B, type: mcreceive 184.108.40.206 21004
- in terminal C, type: mcsend 220.127.116.11 21004
Now, in terminal C, type "hello" and enter.
Normally, terminals A and B shouldn't receive anything. However, on at least 2 red-hat (el4 and el5) and 1 centos5 boxes I could verify the "hello" goes through, which proves promiscuous traffic.
Can anybody verify this?