If I pull internet cable from the back of the machine (or from the local
switch), Windows instantly generates a link local IP address. Windows is
capable of detecting a link to the nearest switch on its own.
We agree that anything beyond that requires pings to discover network
topology.
jm7
Nicolás Alvarez
<nicolas.alvarez@
gmail.com> To
Jim Preston
02/23/2010 01:45 <[email protected]>
PM cc
[email protected], BOINC
Developers Mailing List
<[email protected]>
Subject
Re: [boinc_dev] monitoring network
usage
On 2/23/10, Jim Preston <[email protected]> wrote:
> Yes, I agree, these questions were asked in reference to jm7's
> statements:
>
>> If my connection to the LAN from Windows goes down, Windows knows
>> about it.
>> If the connection from the router to the internet goes down, Windows
>> has no
>> clue.
>>
>> jm7
>
> In which case, the IP would change to the Windows default of
> 169.xxx.xxx.xxx based on not getting a response from the router after
> the DHCP lease had expired or Windows chooses to renew.
That's exactly the case I referred to. If the connection from the
router to the Internet goes down, the connection from the router to
the computer will still work. The router's internal DHCP server will
keep giving the computer the same LAN-local IP address regardless of
whether the Internet connection works or not. The computer doesn't
even know what its *external* IP is (without having to eg. ask an
external site for it). That's just how NAT routers work.
--
Nicolas
_______________________________________________
boinc_dev mailing list
[email protected]
http://lists.ssl.berkeley.edu/mailman/listinfo/boinc_dev
To unsubscribe, visit the above URL and
(near bottom of page) enter your email address.
