From 4fe71a74119c8e15145304d97f36efa1ec2844e9 Mon Sep 17 00:00:00 2001 From: hpa Date: Wed, 28 Mar 2001 19:15:10 +0000 Subject: [PATCH] Explain that old Intel PXE stacks have allergy to PMTU discovery. --- pxelinux.doc | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) diff --git a/pxelinux.doc b/pxelinux.doc index ba4b008..539ea4e 100644 --- a/pxelinux.doc +++ b/pxelinux.doc @@ -80,10 +80,10 @@ Lefebvre: ftp://ftp.mamalinux.com/pub/atftp/ Unfortunately, the Intel LANDesk Service Agent II prior to version -0.99h (PXE PDK V2.4) seems to have a rather serious bug: it requests -the TFTP "blksize" option, but will be mortally confused if this -option is actually accepted by the server! There are three possible -workarounds for this bug: +0.99h (PXE PDK V2.4) seems to have a host of serious bugs. Among +other things, it requests the TFTP "blksize" option, but will be +mortally confused if this option is actually accepted by the server! +There are three possible workarounds for this bug: 1. Use a TFTP server with doesn't support "blksize". @@ -101,6 +101,14 @@ workarounds for this bug: request the "blksize" option if it has tried MTFTP and failed. These DHCP options are beyond the scope of this document. +These systems also break if PMTU discovery is enabled on the TFTP +server. This has to be disabled in the kernel on the TFTP server. On +Linux, you can disable PMTU discovery by setting: + + echo 1 > /proc/sys/net/ipv4/ip_no_pmtu_disc + +Note that this may cause bad performance for other services on the machine. + ++++ SETTING UP THE DHCP SERVER ++++ -- 2.7.4