[AG-TECH] AG & MTU Size

[Colin Perkins]

--> "Luc Renambot" writes:
>] 
>] -----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.

It will certainly reduce the CPU load, provided the codec can produce large
enough frames to be useful, without inducing excessive latency.

Colin