Article ID: 136568
Article Last Modified on 2/20/2007
APPLIES TO
- Microsoft Windows 2000 Server
- Microsoft Windows 2000 Advanced Server
- Microsoft Windows 2000 Professional Edition
- Microsoft Windows NT Workstation 3.5
- Microsoft Windows NT Workstation 3.51
- Microsoft Windows NT Workstation 4.0 Developer Edition
- Microsoft Windows NT Server 3.5
- Microsoft Windows NT Server 3.51
- Microsoft Windows NT Server 4.0 Standard Edition
This article was previously published under Q136568
SYMPTOMS
You may experience duplicate name errors and have problems obtaining IP
addresses from Dynamic Host Configuration Protocol (DHCP) servers if you
have Synoptics hubs on the network.
CAUSE
Synoptics hubs can be configured to use BOOTP to communicate configuration
information. The BOOTP broadcasts made by the hubs and the server used to
configure the hubs interfere with Windows NT DHCP. These hubs can lease IP
addresses from the DHCP server causing duplicate name errors and
preventing clients from obtaining addresses. The event log on the DHCP
server may also show the following error:
Event ID: 1011
Source: DHCP Server
Description: The DHCP Server issues a NACK to the client (MAC address)
for the address (IP address) request.
If a Synoptics hub is causing the error, the MAC address in the above
error will be unusually long, for example:
003C5DC601534D526F73736932
The MAC address in the error message above usually contains 22 digits, not
26 digits. For example, if you have 0018399D0100AA00A3F079, the first four
hexadecimal numbers are the subnet address that the DHCP packet originates
on. When you convert "00 18 39 9d" to decimal and invert it, the result is
157.57.24.0. The last twelve digits are the MAC address (00AA00A3F079).
RESOLUTION
To work around this problem, disable the BOOTP functionality on the
Synoptics hubs and configuration servers and use the TFTP functionality
instead.
To correct this problem, contact Bay Networks Technical Support at (800)
252-6926 to obtain a firmware fix.
Additional query words: prodnt lease router hub dhcpnack
Keywords: kbnetwork kb3rdparty KB136568