how to increase minimum packet size on ubuntu server?

[shayv]

All

Lately I started working with my ubuntu server (7.04) on VLAN tagging - 802.1q.
I managed to define the interface to work with VLANs, but find out that the minimum packet size stayed the same-60, instead of 64 which is the extra 4 Bytes of the 802.1q & 802.1p header.
It appears that there are some network devices, that cut off the VLAN header, and you stay with illegal packet size (60-4=56) so this packet will be dropped (such as ARP)

Do you know how to increase the minimum ethernet packet size?

Thanks

 

[DrD123]

Hi shayv ,

I don't have Ubuntu... but the command is Linux universal:

ifconfig mtu 64

That should change it so that MAX size is 64, and not 60.

Good Luck
DrD

 

[shayv]

DrD

Thanks for your answer, but this is not exacly what I'm looking for.

MTU - Maximum Transfer Unit - will change my maximal packet size, for example from 1514 to 1518

I want to change the MINIMUM packet size.
As for today it's 60 and I want to increase it to 64
Tried looking in ifconfig and ethtool, but couldn't find anything (maybe hidden...), any ideas

Thanks

Shay

 

[blainepruitt]

Have you done any research on sysctl.conf to see if there is a kernel setting you can put into place? You may want to also check /proc/net to see if there is a setting there.

-bp