Knowledge Base ISC Main Website Ask a Question/Contact ISC
Quick Jump Menu
21 DHCP Failover and MCLT configuration implications

Maximum Client Lead Time (MCLT) is defined as the maximum amount of time that one server can extend a lease for a client's binding beyond the time known by the partner server. It's configured on the primary server of a failover pair and transmitted to the…

22 Putting the working server in a failover pair into "partner down" state

You can either edit the leases file or do this via omshell/OMAPI. To change via the leases file: Stop the server, then look for the last failover statement: failover peer "Failover-Pair-Name" state { my state state at 1 date; partner state state at 1 date;…

23 How can I protect my DHCP server from a badly behaved spamming client?

ISC DHCP There's no rate-limiting built into the dhcp server, but you may be able to use iptables or other software or middleware solutions to provide that kind of protection for your server. However, in dhcpd.conf you can block a client by using deny booting;…