I know I have this working, however I don't remember what I did. I know
I can pxeboot and install RHEL on a 9K frame network from a FreeBSD tftp
server/NAT gateway. I do know the first thing in my RHEL install script
is to set the MTU to 9K.
If I have a chance later today, I'll dig into one of my install servers
and try to figure out what options I used with DHCP to get it working.
Sorry I can't be of more help than to say its possible.
Bob Healey
Systems Administrator
Biocomputation and Bioinformatics Constellation
and Molecularium
healer@rpi.edu
(518) 276-4407
On 7/23/2012 1:31 PM, Robert Blayzor wrote:> Is it possible to PXEboot a diskless client with an MTU higher than 1500
(Ie: 9k) ?
>
> The network we currently boot several diskless machines from has a lot of
NFS traffic and we'd like to enable them all for larger MTU's however
the one thing stopping us is the issue with initial boot seemingly only
supporting an MTU of 1500.
>
> I know we can set the MTU later (post boot) on the diskless machines, but
it doesn't seem we can run a higher MTU on the TFTP server as we'd have
TFTP UDP traffic with mis-matched frame sizes at that point.
>