Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements
Webcast-Catalyst9k
New Member

Odd behavior between Win 2000/Server dhcp client and Cisco Net. Registrar

We have observered an odd behavior when Windows 2000/Server dhcp clients lease an IP address from a Cisco Network Registar dhcp server. We are using CNR 3.5(3) and the dhcp server is configured to only lease one IP address per mac address. However, for the Windows 2000/Server clients, the dhcp database shows 11 IP addresses allocated to the server and the dhcp database shows that all 11 IP addresses are allocated to the same mac address. How is this even possible when the dhcp server is only supposed to lease one IP per mac? All 11 addresses get leased within a span of about 2 seconds, but only 1 of the 11 addresses is pingable and an ipconfig on the Windows 2000/server shows that the pingable address is actually the address assigned to the ethernet adapter on the client. Has anyone seen this behavior and know whether this is a Windows 2000/Server issue or a Cisco Network Registrar issue? If every Windows 2000/Server gets 11 addresses allocated to it, the IP address space will be used up very quickly!

2 REPLIES
New Member

Re: Odd behavior between Win 2000/Server dhcp client and Cisco N

You might be having a Microsoft RAS server enabled on your Windows 2K server. This tends to eat up a lot of IPs. Check for that, and disable that .

New Member

Re: Odd behavior between Win 2000/Server dhcp client and Cisco N

Thanks for the suggestion. We will check that out.

88
Views
0
Helpful
2
Replies
CreatePlease to create content