host-identifier and option 82

Michal Vančo mvanco at
Fri Jan 27 18:14:18 UTC 2012

Great. The only remaining question is, whether ISC dhcpd responds with DHCPNAK or just remains silent in case like this. If it responds with DHCPNAK, client will start over trying to get new lease.


On 27.1.2012, at 15:15, Simon Hobson wrote:

> =?utf-8?Q?Michal_Van=C4=8Do?= wrote:
>> What I'm trying to figure out now is, whether it will work the way I described in my previous post (i.e. client will try (unsuccessfully) to renew its IP address from T1 to T2 and then, after T2 passes, will issue a broadcast DHCPREQUEST with properly inserted opt 82 and finally rebinds its IP address.
> Yes, if the server doesn't respond to requests without Option 82, then the client will keep trying, and eventually resort to broadcasts. At that point, your relay agent can add Option 82 and the renewal will work.
> -- 
> Simon Hobson
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