Is this still an issue? As Thomas said, this can be configured via /etc/dhcp3/dhclient.conf. It's quite hard for ifupdown to tell DHCP what MTU to use. Also, the DHCP server can give MTU information to the DHCP client, and isc-dhcp-client honors that as far as I can tell, so perhaps that is the best solution.
--
Met vriendelijke groet / with kind regards,
Guus Sliepen <g...@debian.org>
signature.asc
Description: Digital signature
