Theoretical Max Lease Time
dan.hawker at astrium.eads.net
Thu Aug 31 13:59:00 UTC 2006
> >What is the theoretical maximum lease time that you can set
> in DHCPD???
> About 30 years I think, as in end time must be less than "now +
> 2^31-1 seconds" and also less than the end of time as the system
> knows it (2^31-1 seconds after midnight 1st Jan 1970) which IIRC is
> sometime in 2036.
Ah, that should be sufficient :)
> Bear in mind that should they change their client ID then they will
> still get a different address, and in the absence of a client id then
> the address will change with any change of virtual MAC address (are
> they random or static MAC addresses ?).
Yeah, that I know. Its just the initial config of a new VM that causes
headaches. Vmware dynamically creates the MAC address initially (so is
random, well ish) and then reuses that MAC address as long as the config
file and the *real* MAC address don't change (as I understand it). Hence, if
the VM instance is moved around or the config files name is changed, yeah
it'll change too, but if it stays put it'll be OK.
Am just trying to make the initial rollout as automatic and seamless as
possible, yet allow the VMs to have pseudo-static IPs without knowing the
Thanks for the info
This email is for the intended addressee only.
If you have received it in error then you must not use, retain, disseminate or otherwise deal with it.
Please notify the sender by return email.
The views of the author may not necessarily constitute the views of Astrium Limited.
Nothing in this email shall bind Astrium Limited in any contract or obligation.
Astrium Limited, Registered in England and Wales No. 2449259
Registered Office: Gunnels Wood Road, Stevenage, Hertfordshire, SG1 2AS, England
More information about the dhcp-users