On 7/24/12 6:07 AM, Robert Blayzor wrote:
On Jul 23, 2012, at 1:58 PM, Bob Healey wrote:
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.
The trick is setting the boot time options on the client. The server side
(TFTP server) is the easy part as it's already setup and running. But if the
client boots and it's not jumbo frame enabled, TFTP will surely hang on getting
the PXEboot as the server will be trying to send 9K UDP frames to a client
that's probably defaulted to 1500.
If there is a DHCP option to set the client MTU, I've not found it anywhere.
If it's isc-dhcpd, "option interface-mtu" works.
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