Technical References

Controls how the DHCP server handles ICMP ECHO (ping-before-
offer) requests. Default is true (enable).
If you enable this attribute and configure the DHCP server to
to send ICMP ECHO requests, the server makes unavailable any
address for which it receives an ECHO reply within its
configured timeout period.
If you disable this attribute, the DHCP server also treats
ICMP DEST_UNREACHABLE and TTL_EXPIRED error messages that it
receives after sending ICMP ECHO requests as grounds for making
an address unavailable.
ignore-requests-for-other-servers bool
Controls whether to prevent the normal DHCP server
response to client requests for other servers. No
default.
Normally, if the DHCP server detects a client requesting a lease
from another server for an address that this server is
configured to control, it sets the lease to unavailable. Some
clients, however, might send request packets with bad server ID
options--rather than packets actually directed to other
servers--that the server wrongly interprets as an unavailable
address. Enabling this attribute prevents this.
import-mode bool default = disabled
Controls whether the DHCP server recognizes only packets
generated from the import leases command, ignoring all
others. Default is false (disable).
Use this attribute to update your DHCP server, preventing
clients from receiving addresses during this period.
inhibit-busy-optimization bool default = false
Controls whether the server uses optimization to recover from
periods of congestion. Default false (disable).
By default, the DHCP server determines that it is heavily loaded
when the number of request packets reaches two-thirds of the
total allocated. The server logs a message and attempts to
recover from the congestion by performing several optimizations.
For example, it relaxes the requirement to keep the client?s
last transaction time updated to the granularity specified by
the last-transaction-time-granularity attribute.
When the number of request packets drops to one-third of the
total allocated, the server logs a message and returns to
normal operation. If you enable the inhibit-busy-optimization
attribute, the server does not use the optimizations or log the
messages when it gets congested.
initial-environment-dictionary string
Contains attribute-value pairs that initialize all environment
dictionaries used within the DHCP server. Use these attribute-value
pairs to configure extensions or expressions without having to
re-write the executable code in the extension or expression.
The string must have the format:
"attribute1=value1,attribute2=value2, ... ,attributen=valuen"
ip-history enumbyt default = disabled