multicast: same port, different IP address?
From: Matt Garman
Date: Wed Apr 08 2009 - 12:43:07 EST
I don't really understand what the concept of a port is in Linux with
regards to multicast.
Basically, I want to use multicast on an internal network with many
nodes. I want to use multicast IP addresses to delineate the message
*type*. E.g., 22.214.171.124 for status monitoring, 126.96.36.199 for control
messages, 188.8.131.52 for heartbeats, 184.108.40.206 for chatting, etc etc.
Since I'm using the address space to delineate messages, can I just
hard-code my port (i.e. make it always the same)?
Put another way: what is the effect of having one host subscribe to
multiple multicast streams, where each stream has the same port, but a
different ip address? Is there a performance impact?
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