Win XP discover/offer/req/ack loop (Help!)
Hagedorn at uni-koeln.de
Mon Aug 28 09:35:46 UTC 2006
--On 24. August 2006 16:31:28 -0400 "Jeff A. Earickson"
<jaearick at colby.edu> wrote:
> This smells like a bug to me, maybe in DHCP, maybe in a router setting,
> maybe a rogue DHCP server on the affected subnet, maybe in Windoze.
> I just upgraded to 3.0.5rc1 on both my primary and failover. Then I
> watched the traffic from my problem subnet. Observe the behavior for
> one MAC, probably a Windoze box:
> 1) DHCPREQUEST for 192.168.1.3 (192.168.1.1) from 00:14:38:9d:ce:0d
> via 22.214.171.124: wrong network.
> The machine thinks it is on a 192.168 address and makes a DHCP request
> in that space. I think our routers are configured to drop unroutable
> addresses like 192.168 on the floor. But the dhcp helper on the router
> at 126.96.36.199 at least passed along the bogus request to the ISC DHCP
> 2) DHCPNAK on 192.168.1.3 to 00:14:38:9d:ce:0d via 188.8.131.52
> The ISC DHCP server says "no way", rightly so.
> 3) DHCPDISCOVER from 00:14:38:9d:ce:0d via 184.108.40.206
> DHCPOFFER on 220.127.116.11 to 00:14:38:9d:ce:0d via 18.104.22.168
> The Windoze box comes back to discover what subnet it is on and
> the ISC DHCP server offers it an address in the right subnet.
I wonder if this helps:
The result was that we had to remove the broadcast address entries on the
.:.Sebastian Hagedorn - RZKR-R1 (Gebäude 52), Zimmer 18.:.
Zentrum für angewandte Informatik - Universitätsweiter Service RRZK
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