[CentOS] Re: ISC dhcpd and Vista clients

Paul Bijnens paul.bijnens at xplanation.com
Thu Jul 31 06:20:34 UTC 2008

Scott Silva wrote:
> on 7-30-2008 2:53 PM Paul Bijnens spake the following:
>> Scott Silva wrote:
>>> Has anyone had good luck serving dhcp addresses to Vista clients that 
>>> work reliably?
>>> I have a test system and I can't seem to find out how to properly get 
>>> dhcpd to always respond with broadcast instead of unicast since Vista 
>>> won't honor unicast dhcp packets.
>> My Vista (my wife's actually) has no problems with unicast dhcp packets.
>> Stock dhcpd server in CentOS 5, and Vista Home. Worked without any 
>> special config.
>> Are you sure that is the problem?
> Not sure, but it is one of the suggested problems I see in many google 
> searches. There are registry edits that help, but I don't want to have 
> to do a bunch of edits when we get stuck with a hundred Vista machines. 
> I have plenty of time, for now, to experiment. There are posts that say 
> the subnet needs to be authoritative, but mine is. What happens is that 
> the Vista system will not route outside the local subnet for more than 5 
> or 10 minutes.

Do you mean that you do get an IP-number and default gateway from the
dhcp server, but after 5 to 10 minutes, the default route setting gets

To me that would mean that the dhcp is working fine, but something else 
kicks in after that time that messes up the dhcp settings.  Any 
additional firewall software on the laptop, like Norton etc.

Or can you relate the loss of routing to an action on the dhcp server,
like lease renewing etc.

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