Authoritative Pools; Authoritative Dummy Pools; Change In Server Behavior - HP Aruba JL253A Management And Configuration Manual

For arubaos-switch 16.08

Table of Contents

Authoritative pools

To process the DHCPINFORM packets received from a client within the given IP pool, a DHCP server has to be

configured as authoritative for that IP pool. The server is the sole authority for this IP pool so when a client

requests an IP address lease where the server is authoritative, and the server has no record of that IP address,

the server will respond with DHCPNAK message which indicates that the client should no longer use that IP

address. Any DHCPINFORM packet received for a non-authoritative pool will be ignored by the DHCP server.

The authoritative command has no effect when configured on a static pool or an incomplete pool without a

network statement. In such cases, the server intentionally not send an error message.

A CLI toggle is provided under the pool context that will allow the authoritative configuration.

The authoritative command requires a network statement to be configured on a pool.

A dummy pool, without the range statement, can be configured and made authoritative. A dummy pool allows

static-bind entries which do not have matching dynamic pools with network statements to be configured. By

creating a dummy pool on a DHCP server, the support for DHCPinform packets will not be actively serving the

client on this pool. No active leases or resource consumption will be sent to the DHCP server when this option is

Dummy pools help the DHCP server learn the network topology.

dhcp-server pool dummy192

network 192.168.10.0 255.255.255.255

authoritative

Making the server authoritative for an IP pool changes how the server processes DHCP REQUEST packets.

The following table exhibits the behavior on the receiving DHCP REQUEST and DHCP inform packets from

DHCP clients residing on either authoritative and non-authoritative pools.

Aruba 2930F / 2930M Management and Configuration Guide

for ArubaOS-Switch 16.08