DHCP lease under SuSE is not working., limited at 10 minutes Post: 302533424

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Special Forums IP Networking DHCP lease under SuSE is not working., limited at 10 minutes Post 302533424 by DGPickett on Thursday 23rd of June 2011 03:42:10 PM

06-23-2011

Registered User

Well, a nice design for failover has the secondary just recording leases unless the primary dies. A nasty design says it has to wait 10 minutes and then all the leases are free. Google time again.

Is the other server master and set lower? Try increasing MCLT. http://linux.die.net/man/5/dhcpd.conf

Code:

 
The mclt statement
mclt seconds; The mclt statement defines the Maximum Client Lead Time. It must be specified on the primary, and may not be specified on the secondary. This is the length of time for which a lease may be renewed by either failover peer without contacting the other. The longer you set this, the longer it will take for the running server to recover IP addresses after moving into PARTNER-DOWN state. The shorter you set it, the more load your servers will experience when they are not communicating. A value of something like 3600 is probably reasonable, but again bear in mind that we have no real operational experience with this.

Last edited by DGPickett; 06-23-2011 at 04:56 PM..

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LEARN ABOUT LINUX

dhclient.leases

dhclient.leases(5)						File Formats Manual						dhclient.leases(5)

NAME

       dhclient.leases - DHCP client lease database

DESCRIPTION

       The Internet Systems Consortium DHCP client keeps a persistent database of leases that it has acquired that are still valid.   The database
       is a free-form ASCII file containing one valid declaration per lease.   If more than one declaration appears for a given  lease,  the  last
       one in the file is used.   The file is written as a log, so this is not an unusual occurrance.

       The format of the lease declarations is described in dhclient.conf(5).

FILES

       DBDIR/dhclient.leases

SEE ALSO

       dhclient(8), dhcp-options(5), dhclient.conf(5), dhcpd(8), dhcpd.conf(5), RFC2132, RFC2131.

AUTHOR

       dhclient(8)  was written by Ted Lemon under a contract with Vixie Labs.	 Funding for this project was provided by Internet Systems Consor-
       tium.  Information about Internet Systems Consortium can be found at https://www.isc.org.

																dhclient.leases(5)