Date: Thu, 30 Oct 2003 21:12:32 -0500 (EST) From: Daniel Eischen <eischen@vigrid.com> To: current@freebsd.org Subject: wi problem with message > 7400 bytes Message-ID: <Pine.GSO.4.10.10310302037260.3366-100000@pcnet5.pcnet.com>
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Greetings, I'm having a problem receiving UDP messages over a wi interface: wi1: <Dell TrueMobile 1150 Series PC Card> at port 0x180-0x1bf irq 11 function 0 config 1 on pccard0 wi1: 802.11 address: 00:02:2d:4a:d8:7d wi1: using Lucent Technologies, WaveLAN/IEEE wi1: Lucent Firmware: Station (6.10.1) wi1: 11b rates: 1Mbps 2Mbps 5.5Mbps 11Mbps (wi0 is also a 'Dell TrueMobile 1150 Series PC Card' in a mini-PCI card, but hangs the system when you try and configure it -- so it obviously isn't configured in this set up.) I have a small program that does a trivial UDP test: http://people.freebsd.org/~deischen/udptest.c My results show that: o Receiving large (> 7400 bytes) messages does not work. o Sending large messages works. o Sending & receiving large messages over a wired interface (dc, fxp, etc) works. Am I suppose to be able to receive UDP messages larger than 7400 bytes over the air? To run the above test: # On one machine, run it as a server (it just echoes # the messages back to the client). # $ udptest -D # On the wireless machine, run it as a client (it # sends a message to the server and waits for the # echoed response). # $ udptest -D -c -a <server's ip address> -m <message size> If I set message size to 7392 (plus an 8 byte header in my message = 7400), everything works. Anything higher and I never receive the response. Thanks
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