[mythtv-users] Way out idea on watching samething inmultiplerooms
Gareth Glaccum
gareth.glaccum at btopenworld.com
Thu Jan 7 04:07:40 UTC 2010
----- Original Message -----
From: "Tortise" <tortise at paradise.net.nz>
Seems ironic that you are implying that with multicast traffic many switches
behave as hubs anyway!
---------------------
By default yes, it means that they use a lot less processor power. Also,
many brands of switches, when the processor gets overloaded, they fall back
to broadcast instead of multicast. I have had to get several manufacturers
to re-write their firmware to fix broken implementations of multicast.
If you can, use tcpdump on each machine.
Something like:
tcpdump -i <ethN> src or dst port <multicast portnum>
should show the packets entering (N being your interface id, <multicast
portnum> being the port the multicast program was using)
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