From: Dugal James P. (jpd@louisiana.edu)
Date: Wed Jun 09 2004 - 14:16:35 CDT
Has anyone seen this (strange) behaviour? A Windows XP machine, patched
to current level, that is registered with netreg, is turned on and requests
an address via DHCP. However, it stores the DHCP response such that it
has three DNS servers, BUT not the expected three I specified in the dhcpd.conf
file! The three DNS servers are the last one I specified in the .conf file,
then the NetReg server address, and finally the WINS server address!
This is causing seemingly random accesses to the NetReg DNS and so the
user gets the registration screen and is totally confused. If the user
does an IPCONFIG /RELEASE followed by a /RENEW, so far they have received
and stored proper DHCP-provided info.
The client machine's other info is correct: a registered-range IP addr, proper
netmask and broadcast values, proper gateway and WINS IP addrs.
I am using the ISC dhcp server, version 3.0.1rc13, running under Solaris 2.8
which is at current Sun patch levels. I recently upgraded from 3.0.1rc12,
but I see the same problem reported above with either version of dhcpd.
My dhcpd.conf includes:
option netbios-node-type 8; # 8=>Hybrid: WINS, then bcst, for netbios
...
option domain-name-servers 130.70.128.2, 130.70.132.233, 130.70.128.3;
option netbios-name-servers 130.70.132.33;
We have had several reports of this anomaly but many similar XP installs
work fine.
So, does anyone have any suspicions or comments to help us figure out
what's going wrong? We're going to try to capture an anomalous dhcp exchange
with tcpdump to be able to validate the dhcpd data...
-- James Dugal, N5KNX
Director Internet: jpd@louisiana.edu
Computing Support Services US Mail: PO Box 42770 Lafayette, LA 70504
U. of Louisiana at Lafayette Tel. 337-482-6417 U.S.A.
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