When my laptop boots, it is configured to use a dhcp server. For some
time now, that processing has failed. I can run
tcpdump -n ether host <mac address>
and see the packets going out, but not the replies.
At the dhcp server, the same tcpdump command shows the requests and
replies.
I can get the laptop network stack to function by manually assigning a
valid IP address and then repeatedly pinging other computers on the
network. The arp table is empty, showing incompletes for the mac
addresses. Finally a ping will work and the arp table gets filled in
and the networking functions are OK from then on. I can restart the
network service and now dhcp works. (This behavior occurs at other
sites, so it is not a switch or cable problem.)
Since everything eventually works OK, I figure the hardware is good and
I've fouled up some configuration item. I've tried enabling and
disabling NetworkManager, but it does not seem to have any impact.
Stopping iptables also has no effect.
I'm hoping someone can suggest a debugging approach or possibly stuff I
misconfigured to create this problem.
--
Lloyd Kvam
Venix Corp.
1 Court Street, Suite 378
Lebanon, NH 03766-1358
voice: 603-653-8139
fax: 320-210-3409
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