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Or...
the easies way is to unplug the ethernet cable.
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My university has a rolled out a wireless network covering most of the campus, so ethernet cables aren't very common.
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Howdy,
Or...re: Herb's note
Just to flesh out Herb's observation on turning Airport off/on, this is of course most easily accomplished by the Airport menulet in (ahem) the menu bar, no trip to the System Preferences necessary. I also use the location "Automatic" in the Networking panel and have had no problems going seamlessly between my home Airport, my workplace wired Ethernet, or my workplace Airport...
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Out of curiosity, what is the DHCP Client ID field for, anyway? All I've ever seen is instructions like the above: "Type anything into the DHCP Client ID field." Surely there is a better purpose for it than that?
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Some DHCP servers will require you to use a special ID to get an IP address, Excite @home used to do this. It's a way to prevent random people from connecting to your service.
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I believe it's so you can figure out who's who in your DHCP logs.
The purpose of the DHCP Client Identifier
The DHCP Client Identifier is just that, a unique (per subnet) identifier (such as a hostname or serial number) allowing the server to identify the client and select the appropriate response. In the absence of a Client Identifier, the "chaddr" field (hardware address) is used.
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That's interesting.
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When the link is lost the OS shuts the port down and assumes its DHCP lease is now invalid/expired. When ever the connection is reestablished the OS will send out a DHCP request to obtain an IP regardless of the length of it's previous lease.
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Aha....I see....you are right: I just unplugged my ethernet while looking at system.log and sure thing, it knows, shuts down and restarts several things. Cool :) |
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