DHCP Feature

Unanswered Question
Feb 25th, 2004
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i've got a problem with the DHCP feature on the Cisco Router:

When a PC with Windows 98 make a DHCP request, the subnet mask release by the router is

If the request is made by a PC with Windows XP or Windows 2000, I haven't got this problem (all ok).

If i do an IPCONFIG /RENEW (manually) on the PC with Windows 98, it takes the correct parametes.

You can understand that i can't say to all user with 98 to make IPCONFIG /RENEW..... ( i'll hope that when they power on the PC all is ok).

The configuration is correct.


Only ip ,subnet and gateway.

I Repeat: The problem is only with Windows 98 PC.

I've the same problem with two different IOS.

This is the configuration


ip dhcp excluded-address

ip dhcp excluded-address

ip dhcp ping packets 3


ip dhcp pool 1



lease 3



In this router (1721) the release software is 12.1(1)T.

Please, give me a feedback

Thanks for the support to all.


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tbruce Fri, 02/27/2004 - 11:41
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I use DHCP on Cisco2610 routers now and then. The only thing I don't see in your config is "no ip dhcp conflict logging" which I understand needs to be in the config. Do you have that statement in your configuration. I am using IOS 12.2(5) Have not had this issue with OS's 98,NT,2000 and XP.


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