can't lower mtu on via_velocity

fadlouni · Posted: Wed Jan 05, 2005 8:46 pm Post subject: can't lower mtu on via_velocity

Hi. just got myself a new amd64 cpu and corresponding abit av8 motherboard.

it uses the via_velocity ethernet driver.
everything is working fine. however i need to lower the MTU to 1452, but it doesn't accept the command:
ifconfig eth0 mtu 1452
SIOCSIFMTU: Invalid argument

in fact i tried even mtu of 500 and it doesn't take it.

however if i try anything bigger than 1500 it does accept it!!, is there some bug in the code where the mtu checking logic is reversed?

i'm running gentoo-dev-source 2.6.10-r2, some other info:
uname -a
Linux fadi-pc 2.6.10-gentoo-r2 #3 Wed Jan 5 08:46:50 CET 2005 x86_64 AMD Athlon(tm) 64 Processor 3500+ AuthenticAMD GNU/Linux

Regards,
Fadi.

ikaro · Advocate Joined: 14 Jul 2003 Posts: 2527 Location: Denmark

use/try another kernel....
it works fine here... im using another kernel.
_________________
linux: #232767

fadlouni · Posted: Wed Jan 05, 2005 10:38 pm Post subject:

Thanks for the reply.

but which kernel do you advise?

i'm using gentoo-dev-sources as per advise of the amd64 installation handbook, since it says it has lots of amd64 patches.

Fadi.

fadlouni · Posted: Wed Jan 05, 2005 10:53 pm Post subject:

by the way, just tried:
-gentoo-dev-sources 2.6.9-r12
-and development-sources 2.6.10

and both have the same problem. only accepting MTUs > 1500

Any ideas?

Fadi.