How does DHCPD determine what IP address to assign and...

David W. Hankins David_Hankins at
Wed Dec 26 21:07:17 UTC 2007

On Wed, Dec 26, 2007 at 01:15:44PM -0600, Ryan McCain wrote:
> The UID always looks something like this in the lease file:: 
> uid "\000cisco-"

it's kind of unfortunate that in dhcpd.leases it was called 'uid', but
what it means is 'dhcp-client-identifier'.

i gather from comments there was some hope that people would soon be
calling these "globally unique identifiers," but it's clear this has
not panned out.
> Would this then be the correct syntax:?
> class "DialUp" {
>     match if substring(option vendor-class-identifier, 3,5) = "Async";

the vendor-class-identifier is not the dhcp-client-identifier.  you'd
have to show us the vendor-class-identifier this device is emitting if
you wanted to match clients this way.

Ash bugud-gul durbatuluk agh burzum-ishi krimpatul.
Why settle for the lesser evil?
David W. Hankins	"If you don't do it right the first time,
Software Engineer		     you'll just have to do it again."
Internet Systems Consortium, Inc.		-- Jack T. Hankins

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