[CentOS] dhcp lease-time
office at plnet.rs
Thu Jan 5 10:21:45 UTC 2012
On 01/05/2012 09:54 AM, John Hodrien wrote:
> On Thu, 5 Jan 2012, Timothy Murphy wrote:
>> Why is the default lease-time set to only 10 minutes (600 seconds)
>> in /etc/dhcp/dhcpd.conf (CentOS-6.2) as distributed?
> I assume the dull answer is: because that's what Redhat set it to.
>> Why is not set to a much longer time?
> What length do you think the correct default should be?
>> Is there any disadvantage in doing that?
>> Or conversely, is a short lease-time safer in some way?
> Short lease times work better with very transient devices, since the IP
> address is returned to the pool much faster when a machine disconnects but
> doesn't release the DHCP lease.
Also, there should be distinction between default and max lease time.
DHCP server uses default lease time too force DHCP client to "chek-in"
in that time period. If device does not respond, then DHCP server will
reuse that IP.
Max lease time is used to allow DHCP client so the traffic is lesser and
after that time DHCP client will ask for renewal of the IP.
(Love is in the Air)
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