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Full Discussion: DHCP lease under SuSE is not working., limited at 10 minutes
Special Forums IP Networking DHCP lease under SuSE is not working., limited at 10 minutes Post 302533153 by aixlover on Wednesday 22nd of June 2011 09:37:25 PM
Old 06-22-2011
DHCP lease under SuSE is not working., limited at 10 minutes
Hi,

I got a strange issue here: We are using ISC DHCP v4 which is default in Open SuSE 11.4. These two options 'default-lease-time' and 'max-lease-time' are set in all subnets, with values between 43200 (12 hours) to 518400 (144 hours). See partial dhcpd.conf below please.

Now the lease time from Windows client's ipconfig output is only 10 minutes. Why? (dhcpd on servers restarted many times. ipconfig /release, ipconfig /renew on client run many times)

Please help. Thank you much in advance!

Code:
lease-file-name "/etc/dhcpd.leases";
default-lease-time 43200;  # 12 hours
max-lease-time 86400;      # 24 hours
one-lease-per-client true;

subnet 10.1.1.0 netmask 255.255.255.0 {
pool {
   failover peer "failover";
   range 10.1.1.100 10.1.1.200;
   deny dynamic bootp clients;
}
   option subnet-mask 255.255.255.0;
   option broadcast-address 10.1.1.255;
   option routers 10.1.1.1;
   default-lease-time 86400;
   max-lease-time 518400;
}

 

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LEARN ABOUT SUSE

udhcpd.conf

UDHCPD.CONF(5)						 GNU/Linux Administrator's Manual					    UDHCPD.CONF(5)

NAME

       udhcpd.conf - udhcp server configuration file

DESCRIPTION

       The file /etc/udhcpd.conf contains configuration information specific to the udhcp server.  It should contain one configuration keyword per
       line, followed by appropriate configuration information.

OPTIONS

       start ADDRESS
	      The starting address of the IP lease block is ADDRESS.  The default is 192.168.0.20.

       end ADDRESS
	      The ending address of the IP lease block is ADDRESS.  The default is 192.168.0.254.

       interface INTERFACE
	      The udhcp server should listen on INTERFACE.  The default is eth0.

       max_leases LEASES
	      Offer at most LEASES leases (including those reserved by OFFERs, DECLINEs, and ARP conflicts).  The default is 254.

       remaining REMAINING
	      If REMAINING is yes, store the time remaining for each lease.  If it is no, store the expiration time for each lease.   The  default
	      is yes.

       auto_time SECONDS
	      Write the lease information to a file every SECONDS seconds.  The default is 7200.

       decline_time SECONDS
	      Reserve an IP for SECONDS seconds if a DHCP decline message is received.	The default is 3600.

       conflict_time SECONDS
	      Reserve an IP for SECONDS seconds if an ARP conflict occurs.  The default is 3600.

       offer_time SECONDS
	      Reserve an IP for SECONDS seconds if it is offered.  The default is 60.

       min_lease SECONDS
	      Reserve an IP for the full lease time if the lease to be given is less than SECONDS seconds.  The default is 60.

       lease_file FILE
	      Write the lease information to FILE.  The default is /var/lib/misc/udhcpd.leases.

       pidfile FILE
	      Write the process ID to FILE.  The default is /var/run/udhcpd.pid.

       notify_file FILE
	      Execute FILE after the lease information is written.  By default, no file is executed.

       siaddr ADDRESS
	      BOOTP specific option.  The default is 0.0.0.0.

       sname NAME
	      BOOTP specific option.  There is no default.

       boot_file FILE
	      BOOTP specific option.  There is no default.

       option OPTION
	      DHCP specific option.

	      subnet ADDRESS

	      timezone OFFSET

	      router ADDRESS...

	      timesvr ADDRESS...

	      namesvr ADDRESS...

	      dns ADDRESS...

	      logsvr ADDRESS...

	      cookiesvr ADDRESS...

	      lprsvr ADDRESS...

	      hostname HOSTNAME

	      bootsize SIZE

	      domain DOMAIN

	      swapsvr ADDRESS

	      rootpath PATH

	      ipttl TTL

	      mtu MTU

	      broadcast ADDRESS

	      ntpsrv ADDRESS...

	      wins ADDRESS...

	      requestip ADDRESS

	      lease SECONDS

	      dhcptype TYPE

	      serverid ADDRESS

	      tftp FILE

	      bootfile FILE
		     The default for lease is 864000.  There are no defaults for the other options.

SEE ALSO

       udhcpd(8).

GNU
/Linux							    2001-09-26							    UDHCPD.CONF(5)
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