dhcp renew

Denys Vlasenko vda.linux at googlemail.com
Sat Apr 30 19:55:56 UTC 2011


On Thursday 28 April 2011 18:45, Michele Marcon wrote:
> Hi,
> currently udhcpc ignores options 58 and 59 (Renew time and Rebind time).
> 
> The support for these option would be helpful for the deployment of busybox devices on large network:
> 
> This is because on large networks, it may be a good practice to have large lease time but smaller renew and rebind time.
> 
> The large lease time is because in case something goes wrong with the dhcp server the devices can keep their address for a long time.
>
> With smaller renew and rebind time it is possible to have a high turnover for the addresses, and if a device is connected for little time it does not waste (keep busy) its address for a long time when it's not connected.

I don't understand the last described scenario. How exactly DHCP server
is going to know that the address of a client which worked just a few minutes
and then was powered off can be reused?


> If udhcp supports these options is possible to have all of this (large lease time coupled with fast turnover).

Can you send a patch?
-- 
vda


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