Assign Fix IP by Option 82

David W. Hankins dhankins at
Tue Nov 17 00:27:16 UTC 2009

On Mon, Nov 16, 2009 at 10:04:28AM -0700, Jerimiah Cole wrote:
> host {
>   host-identifier option agent.circuit-id "blah";
>   fixed-address;
> }

I can never remember if that's the precise syntax, but you have the
right idea.

> ?  If so, how does this compare to class-per-client configuration in terms 
> of match performance?

I have not measured; but class matching is basically a linear list,
whereas the host-identifier syntax creates a hash table for each host
identifier source-option, and these are searched linearly.

So I would expect an improvement, but I don't know at what level of
scale the daemon's other CPU burdens are more significant.

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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