apiase...@midatlanticbb.com wrote:
> I'm wondering if a patch was added to windows update at some point to
> fix the problem. Is your Vista totally updated?

Just this week I've had my hands on several fully patched Vista machines
(including my laptop) as well as two other laptops -- one with Vista and
no service packs or updates at all, and one with only SP1 present. All
of them worked.

It's very inconsistent. I wish I could reproduce it somewhere, it would
make investigating it easier.

I just checked on my laptop, http://support.microsoft.com/kb/928233 (the
KB article linked by Chris in another post in this threat) mentions a
registry setting to force the broadcast flag off for non-Windows DHCP
Servers:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{GUID}

"DhcpConnForceBroadcastFlag"=dword:00000000

On my laptop this is set to 1, and it still works for me. I've even
plugged directly into my ALIX with no switch and pulled an IP from there
with this laptop, no switch involved.

Makes me really suspect some kind of combination of switch, NIC
brand/driver on the pfSense box, or some other interaction of that
nature. The only way to track it down is probably to collect more data
about setups where the problem appears. When it comes to managed
switches, there could even be a setting on the switch that causes (or
prevents) the problem from appearing.

Jim

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