Technical References

Controls whether the DHCP server collects statistics for
performance monitoring.
collect-sample-counters bool default = disabled
Controls whether the DHCP server collects activity statistics
counters independently of the log-settings attribute flag.
If false, this attribute is disabled.
If true, this attribute enables collecting activity
statistics.
Note: These activity statistics counters are also enabled,
if you enable 'activity-summary'
logging is enabled (see 'log-settings').
default-free-address-config nameref(AddrTrapConfig)
Specifies the default SNMP free-address trap configuration object
for the server. All scopes that are not individually configured
use this default free-address value.
defer-lease-extensions bool default = true
Determines whether the DHCP server can defer extending leases
to their full lease expiration time.
If enabled (true), the DHCP server can defer extending the lease
expiration time. Rather than give the client the full configured
lease time, the server instead gives the client the remaining
time on the existing lease, improving server performance and
throughput. The DHCP server typically defers extending the lease
if the client renews early; that is, before the client's lease
renewal time (T1) elapses.
If enabled, the DHCP server can save committing the lease to
disk and updating its failover partner with an extended lease
expiration time.
If disabled, the DHCP server always attempts to extend the
lease expiration time. However, there may be conditions
that prevent the server from extending the lease for the full
configured lease time; for example, failover protocol restrictions.
delete-orphaned-leases bool default = false
Controls how the DHCP server handles orphaned leases.
Default is false (disabled).
A lease is orphaned if:
--It does not match a range or reservation in a configured scope, or
--If it appears in the lease state database with a VPN ID that does
not match a VPN in the database.
If this is attribute is true, the server deletes orphaned leases
when the server next reloads. This ensures that the lease state
database has no old, unconfigured leases in it, but it also may
cause the total loss of lease state information due to a mistake
in configuration.
If this attribute is false, the server ignores the entries in
the lease state database. If the lease was orphaned due to a
configuration mistake, then when you when you correct the
mistake, the DHCP server can use the lease.
Whether true or false, the server cannot use the lease.
delete-orphaned-subnets bool default = false