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

David W. Hankins David_Hankins at isc.org
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-10.116.6.251-Async32"

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?	 https://secure.isc.org/store/t-shirt/
-- 
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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