Reset DHCP via terminal...

#1 Thu, 29 Aug 2002 - 09:15

My apartment has a prewired ISP. Basically, the thing sucks. Their DHCP services blow...90% of the time when my machine comes back from sleep I've lost my security token and need to reload the DHCP. Is there a command in Unix that'll let me rebind?

Josh

#2 Thu, 29 Aug 2002 - 10:58

I recall reading an Apple KB article that inactivate/reactivate the specific ethernet interface in the Network pref panel is equivalent to releasing/renewing the DHCP lease.

In OS 9, I simply type "L" in the NetworkSetupTest utility from Apple Dev site. (Thanks to Comcast's crummy DHCP and CPE=1 idiocy).

#3 Thu, 29 Aug 2002 - 20:53

Just a thought... it could be that some other user accidentally put another DHCP server onto the network, thus confusing things.

tooki

#4 Sat, 31 Aug 2002 - 02:42

Quote:

Originally posted by JFischel:
My apartment has a prewired ISP. Basically, the thing sucks. Their DHCP services blow...90% of the time when my machine comes back from sleep I've lost my security token and need to reload the DHCP. Is there a command in Unix that'll let me rebind?

Josh

The specific commands to do it in terminal (as per the original request) are:

sudo ifconfig en1 down
<enter password>
sudo ifconfig en1 up

This temporarily turns off the AirPort interface, then brings it back up, thereby causing it to renegotiate an IP address with the DHCP server.