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Losing Big UDP packets through localhost

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Losing Big UDP packets through localhost

Subject: Losing Big UDP packets through localhost
From: John Harte <email@hidden>
Date: Wed, 23 May 2007 23:43:22 -0400

Hello,

I can't pass UDP packets > 16kB over localhost using 10.4.9.

I have a server that sends UDP packets up to 32kB in length and a client that receives them. The server sets its output buffer size to 32Kb with SO_SNDBUF, the client sets its input buffer size to 64kB with SO_RCVBUF.

It all works when the client and server run on separate machines. When the client and server are on the same machine the client receives no packets. Reducing the size to 16kB works.

Is there something I can change to allow the bigger UDP packets through?
I found nothing obvious in sysctl.

Thanks
John
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