[AG-TECH] AG & MTU Size

Luc Renambot luc at evl.uic.edu
Wed May 14 17:07:46 CDT 2003


] 
] -----Original Message-----
] From: owner-ag-tech at mcs.anl.gov 
] [mailto:owner-ag-tech at mcs.anl.gov] On Behalf Of Colin Perkins
] Sent: Wednesday, May 14, 2003 2:34 PM
] To: Mike Weaver - MICS/USDOE
] Cc: ag-tech at mcs.anl.gov
] 
] 
] As shipped, both vic and rat have a 1500 octet maximum packet 
] size hard coded. This can easily be increased, if you're 
] willing to recompile the tools.
] 
] Increasing the packet size might help vic if you use a codec 
] that generates large frames. It won't help with rat, since 
] none of the audio codec frames are that large (and bundling 
] multiple frames per packet just increases the latency).
] 
] Colin
] 

Yes, but if you loose one of these frames, with current codecs,
you're dead. Packet loss over udp multicast is dangerous.
But as with Jumbo frames, it might reduces CPU load.

    Luc.
luc at evl.uic.edu
http://www.evl.uic.edu/luc  




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