[issue12373] Duplicate packets in Multicast Receiver

Charles-François Natali added the comment: Note that the duplication is mandatory for multicast, but with unicast the kernel is free to do whatever he wants, most of the time only one socket will receive it. -- ___ Python tracker

[issue12373] Duplicate packets in Multicast Receiver

Charles-François Natali added the comment: This is normal. You're binding twice to the same port thanks to SO_REUSEADDR, but in case of multiple binds to the same UDP port, all packets received are duplicated by the kernel to every socket. Closing as invalid. -- nosy: +neologix resolu

[issue12373] Duplicate packets in Multicast Receiver

New submission from Aleksey Zhurbitsky : I use http://svn.python.org/projects/python/trunk/Demo/sockets/mcast.py to receive multicast stream. When i run one instance of this script to receive certain multicats stream all is fine, but when i run two instance of this script simultaneously to joi