Messages in this thread |  | | Date | Wed, 28 Jul 2004 15:30:53 -0700 | | From | Ben Greear <> | | Subject | Re: PATCH: VLAN support for 3c59x/3c90x |
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Alan Cox wrote: > On Wed, Jul 28, 2004 at 02:33:56PM -0700, Ben Greear wrote: > >>>Stefan de Konink ported this code from the 2.4 VLAN patches and tested it >>>extensively. I cleaned up the ifdefs and fixed a problem with bracketing >>>that made older cards fail. >> >>I am sure this will be appreciated by the VLAN users! >> >>Also, do you happen to know how large of an MTU these cards >>can support? > > > In VLAN mode they support just the extra VLAN bits, with the length > checking turned off its either FDDI or jumbo frame size but I don't remember > which. I think FDDI.
So if you try to configure the MTU to 1504 using ifconfig or whatever, will that actually work?
One reason I ask is that I saw a report of a bug/issue where it was not possible to send a raw-packet from user space that is bigger than the MTU. This would preclude user-space from generating a VLAN packet with the extra 4 bytes. Being able to change the MTU would at least partially work around this issue.
Ben
-- Ben Greear <greearb@candelatech.com> Candela Technologies Inc http://www.candelatech.com
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