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Old 10-11-04, 03:33 AM   #1
drrandom
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Join Date: Oct 2004
Posts: 3
Default Latest nvnet network driver prevents setting MTU < 1500

I have an nforce2 based motherboard, and recently upgraded from Mandrake 9.2 to 10.0 (a bit late you might say). I am using the 2.6.3-7 kernel build.

I have the latest (6111 think?) nforce drivers installed, and everything seems to be working well, except that the nvnet driver refuses to let me set the MTU to a value less than 1500. This is the maximum size of network packets, and given that somewhere on my ADSL connection the fragment messages are lost, I have to set this to 1458 or less for certain things to work (sending large emails, visiting some websites).

I think this might also explain some of the earlier posts, specifically to do with visiting websites with content bigger than a certain size.

Looking at the nvidia documentation, it suggests MTU should be set to a value between 1500 and 9000ish, but I always used to have it set to 1458 with a previous nvnet driver.

Anyone got any ideas as to how I can change this?

The symptoms are:

"ifconfig eth0 mtu 1458"
results in the error message

"SIOCSIFMTU: Invalid argument"


Thanks for any help,

Cheers,

Tim
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