Dhcp Server Database File - Alcatel-Lucent OmniSwitch 9900 Series Network Configuration Manual

Configuring an Internal DHCP Server

DHCP Server Database file

The dhcp(v6)Srv.db or the DHCP server database or lease file is initialized when the DHCP server
function takes over or is restarted. The DHCP server database file contains the mappings between a client
IP address and MAC address, referred to as a binding.
There are two types of bindings:
Static bindings - Map a single MAC address to a single IP address.
Dynamic bindings - Dynamically map a MAC address to an IP address from a pool of IP addresses.
Details of both the dynamic and static bindings, are stored in the dhcp(v6)Srv.db file.
The dhcp(v6)Srv.db file is read when the switch reloads or the DHCP service restarts. The server
database file is read-only and must not be opened or edited by the user. This file provides an account of all
the subnets configured and helps in detecting all the unmanaged leases. The lease file is synchronized with
the DHCP server periodically based on a timer for smooth operation during takeover and restart. The
default value of this timer is 1 minute. The timer ping mechanism is used to prevent duplicate IP address
allocations to clients in the same subnet. The lease file synchronization is applicable for both chassis and
stack based OmniSwitch products.
OmniSwitch AOS Release 8 Network Configuration Guide
Configuring DHCP Server on OmniSwitch
December 2017 page 22-10