Vista keeps name server options from previous lease
dhcp1 at thehobsons.co.uk
Sat Sep 15 08:19:26 UTC 2007
Kirsten Petersen wrote:
>I realise this is probably not a ISC-DHCP issue, but if anyone has
>seen this and can provide insight, I would appreciate it.
Well as it happens, it sounds very familiar ...
>Our residence halls have a range where they hand out leases to
>unknown clients. They also hand out a name server option different
>from the campus ones. This name server redirects all requests to a
>registration page. Once registered, the clients get a new lease,
>with the usual name servers, and go along their merry way.
>We also have a wireless network in the residence halls. What we are
>seeing with Vista clients is this: the client picks up a lease from
>the wireless network and gets the options for the main campus name
>servers. Then, the user plugs into a wired port in the residence
>hall and gets a new lease from the dhcp server on that network.
>However, their name server option does not get updated. Thus, they
>don't get redirected to the registration page, because they are
>talking to the wrong nameservers.
>So, what seems to be happening is that Vista is keeping the name
>server options from a previous lease. I haven't been able to find
>anything in the archives pertaining to this issue with Vista. Has
>anyone else come across it? Is it a Vista bug?
Can you post your config ?
Does it only happen with Vista ? Have you sniffed the DHCP packet
contents to check that the right values are being sent ?
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