[gPXE] Strange ARP problem with gpxe 1.0.0+

[Ben Derstine]

I didn't but putting on seems to have solved problem- thanks.  I guess
my gpxe script is trying to hit the network before the switch gets done
with spanning-tree after the interface first comes up (it takes about 30
seconds on these switches.)  I'm going to see if I can put a timing
delay in my gpxe script to allow for this.

 

Ben

 

From: gpxe-bounces at etherboot.org [mailto:gpxe-bounces at etherboot.org] On
Behalf Of Clive Eisen
Sent: Monday, May 17, 2010 1:40 PM
To: Ben Derstine
Cc: gpxe at etherboot.org
Subject: Re: [gPXE] Strange ARP problem with gpxe 1.0.0+

 

 

On 17 May 2010, at 17:45, Ben Derstine wrote:





Hi,  I'm using gpxe 1.0.0+ and it's not working in certain cases where
it tries to ARP for the default gateway I configured for it via a
script.  After a lot of head scratching I finalized sniffed the traffic
using Wireshark to see exactly what it was doing when it didn't work
versus what it was doing when it did work.   I've included the two ARP
requests below.   It works when I plug the computer that I'm using gpxe
for into a little Netgear switch which then connects to a Cisco 2960.
When I plug it directly into the 2960 it doesn't work.   The ARP request
packets from gpxe look slightly different between these two scenarios
(top one works):

 

 

Have you got 'spanning-tree PortFast' set on the port on the 2960?

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