Hi Everyone,

I just "updated" my cobbler setup (yum -y update) and I have a bizarre problem with a previously-working setup. It seems that now the network does not work properly. When I kickstart a machine, if I ping the (temporary) DHCP address that the machine is allocated I get three distinct phases:

[ While initial boot ]
From 10.5.10.5 icmp_seq=90 Destination Host Unreachable
From 10.5.10.5 icmp_seq=91 Destination Host Unreachable
From 10.5.10.5 icmp_seq=92 Destination Host Unreachable
["Sending request for IP Information"]
64 bytes from 10.5.10.23: icmp_seq=93 ttl=64 time=1383 ms
64 bytes from 10.5.10.23: icmp_seq=94 ttl=64 time=383 ms
[ 2 or 3 pings later, when it attempts to download stage2.img - back to Destination Host unreachable just packet loss ]

On the cobbler server, I get what seems to be a normal output:

Dec 23 18:43:33 gcisvlin-cobbler dhcpd: DHCPDISCOVER from 00:50:56:ac:5d:50 via eth1
Dec 23 18:43:34 gcisvlin-cobbler dhcpd: DHCPOFFER on 10.5.10.23 to 00:50:56:ac:5d:50 via eth1
Dec 23 18:43:35 gcisvlin-cobbler dhcpd: DHCPREQUEST for 10.5.10.23 (10.5.10.5) from 00:50:56:ac:5d:50 via eth1
Dec 23 18:43:35 gcisvlin-cobbler dhcpd: DHCPACK on 10.5.10.23 to 00:50:56:ac:5d:50 via eth1
Dec 23 18:43:36 gcisvlin-cobbler in.tftpd[3530]: tftp: client does not accept options
Dec 23 18:43:56 gcisvlin-cobbler dhcpd: DHCPDISCOVER from 00:50:56:ac:5d:50 via eth1
Dec 23 18:43:56 gcisvlin-cobbler dhcpd: DHCPOFFER on 10.5.10.23 to 00:50:56:ac:5d:50 via eth1
Dec 23 18:43:56 gcisvlin-cobbler dhcpd: DHCPREQUEST for 10.5.10.23 (10.5.10.5) from 00:50:56:ac:5d:50 via eth1
Dec 23 18:43:56 gcisvlin-cobbler dhcpd: DHCPACK on 10.5.10.23 to 00:50:56:ac:5d:50 via eth1

Has anyone seen this before? Any pointers? I can't see any obvious error from the kickstart output, but even in tty3 it flashes past pretty fast. Unfortunately, it dies before I get to a shell so I can't really debug further, as it can't download stage2.img.

If it helps, both cobbler and client are VMWare ESX guests, and the cobbler server has been used to kickstart a large number of other guests before! I updated VMWare tools (on the cobbler server) during the upgrade, not sure if that might be relevant.

Many thanks,

Alex