Once dhcpd (IPv4) is started, is there any way to check its internal pool status? e.g how many addresses are available?
I checked man(8) dhcpd, there's no signals/files available for that info.
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2 Answers
Checking status of leases is easiest with analysis tool.
http://dhcpd-pools.sourceforge.net/
After building the dhcpd-pools, you can use dhcpd.conf and dhcpd.leases as inputs to the command ./dhcpd-pools.
On Ubuntu there is the file /var/lib/dhcp/dhcpd.leases, but it is rather verbose and you probably need a little script if you want more high level statistics. I am unaware of existing tools to do this.
There is a separate man page for this file man dhcpd.leases describing the database format.
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1Thanks for the filename , on arch linux I find it was located at
/var/state/dhcp/dhcpd.leasesdaisy– daisy2012-05-27 07:57:02 +00:00Commented May 27, 2012 at 7:57 -
On X random linux distro, the location of the lease file is probably defined in the dhcpd.conf file. It might possibly use the compiled-in default though. The config file usually lives under /etc (although perhaps in a subdirectory; red hat puts it in /etc/dhcp/dhcpd.conf).Dan Pritts– Dan Pritts2013-07-09 16:12:12 +00:00Commented Jul 9, 2013 at 16:12
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1@DanPritts The parameter is called
lease-file-nameindhcpd.confIIRC.jippie– jippie2013-07-09 17:37:38 +00:00Commented Jul 9, 2013 at 17:37