Insert delay in dhcp3-relay ?
dhcp1 at thehobsons.co.uk
Wed May 4 20:35:47 UTC 2011
>When DHCP A is online a new time, I want the client uses DHCP A and
>not the C (not necessary immediatly), for example after a reboot of
>the client (for example after a night, the worker go to the company
>and put the computer on).
>After the reboot of the computer, the computer send on the broadcast
>a "Request" (with the old IP address: ip address in the range of
>DHCP C), so if I put a delay, the Relay not send the request to DHCP
>C and after a few second the client send a "DHCP - Discover" (to
>find a DHCP) and DHCP A send an offer, which the client accept
>(Request - ACK ).
>But I can't put a delay ...
You may care to look at the min-secs statement. Adding this to the
subnet declaration for the 'remote' subnet on each server should
achieve what you want.
The min-secs statement
Seconds should be the minimum number of seconds since a client began
trying to acquire a new lease before the DHCP server will respond to
its request. The number of seconds is based on what the client
reports, and the maximum value that the client can report is 255
seconds. Generally, setting this to one will result in the DHCP
server not responding to the client's first request, but always
responding to its second request.
This can be used to set up a secondary DHCP server which never
offers an address to a client until the primary server has been
given a chance to do so. If the primary server is down, the client
will bind to the secondary server, but otherwise clients should
always bind to the primary. Note that this does not, by itself,
permit a primary server and a secondary server to share a pool of
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