Wacky DHCP values that work in windows but not in FreeBSD

[Doug Barton]

Michael K. Smith - Adhost wrote:
>> -----Original Message-----
>> From: owner-freebsd-net at freebsd.org [mailto:owner-freebsd-
>> net at freebsd.org] On Behalf Of Julian Elischer
>> Sent: Monday, October 12, 2009 4:00 PM
>> To: Doug Barton
>> Cc: freebsd-net at freebsd.org
>> Subject: Re: Wacky DHCP values that work in windows but not in FreeBSD
>>
>> Doug Barton wrote:
>>> Howdy,
>>>
>>> I usually have a wireless router connected directly to the
> AT&T/Yahoo
>>> DSL modem but last night I wanted to do some debugging so I plugged
>> my
>>> laptop directly into the modem (after powering off the modem, etc.).
>>>
>>> The values I got back from DHCP not only don't make sense, they
>> didn't
>>> work in FreeBSD at all. Dual-booting to Windows showed that the
>> values
>>> I saw from DHCP were "correct," and somehow they managed to work.
>>> Taking a closer look at the router after I plugged it back in showed
>>> the same.
>>>
>>>         Dhcp Enabled. . . . . . . . . . . : Yes
>>>         Autoconfiguration Enabled . . . . : Yes
>>>         IP Address. . . . . . . . . . . . : 76.212.147.xxx
>>>         Subnet Mask . . . . . . . . . . . : 255.255.0.0
>>>         Default Gateway . . . . . . . . . : 151.164.184.xxx
>> huh?
>>
>> only way this could work would be if it was marked as "point to point"
>> I think..
> 
> That could be a primary IP address on an interface on which your 76
> address is a sub interface. 

Can you specify what you mean by 'that'?

> The interface will do proxy-arp when a
> traffic request comes in.  Or something else!  I'm not sure if this will
> work, but you could actually hard code your default gateway with a
> -hopcount 2 (or higher) and see if that works.  I've not tried it on a
> live machine.  Something like route add default 151.164.184.xxx
> -hopcount 5.  You may have to delete the DHCP-assigned entry first.

Ah, I didn't know about -hopcount, thanks. There was no default route
installed at all when I booted. I tried 'route add default 151...'
even though I was sure it wouldn't work, and I was not disappointed.

Doug

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