Amer Networks E5Web GUI - Manual (Page 371)

5.4. IP Pools
Note
IP pools can currently only be used with IPv4 DHCP.
Overview
An IP pool is used to offer other subsystems access to a cache of DHCP IP addresses. These
addresses are gathered into a pool by internally maintaining a series of DHCP clients (one DHCP
client per IP address). More than one DHCP server can be used by a pool and can either be
external or be local DHCP servers defined in cOS Core itself. Multiple IP Pools can be set up with
different identifying names.
External DHCP servers can be specified in one of two ways:
• As the single DHCP server on a specific interface
• One of more can be specified by a list of unique IP address.
IP Pools with Config Mode
A primary usage of IP Pools is with IKE Config Mode which is a feature used for allocating IP
addresses to remote clients connecting through IPsec tunnels. For more information on this see
Section 9.4.3, “Roaming Clients”.
Basic IP Pool Options
The basic options available for an IP Pool are:
DHCP Server behind interface Indicates that the IP pool should use the DHCP server(s)
residing on the specified interface.
Specify DHCP Server Address Specify DHCP server IP(s) in preferred ascending order to be
used. This option is used instead of the behind interface
option.
Using the IP loopback address 127.0.0.1 indicates that the
DHCP server is cOS Core itself.
Server filter Optional setting used to specify which servers to use. If
unspecified any DHCP server on the interface will be used.
The order of the provided address or ranges (if multiple) will
be used to indicate the preferred servers.
Client IP filter This is an optional setting used to specify which offered IPs
are acceptable. In most cases this will be set to the default
of all-nets so all addresses will be acceptable. Alternatively,
a set of acceptable IP ranges can be specified.
This filter option is used in the situation where there may be
a DHCP server response with an unacceptable IP address.
Chapter 5: DHCP Services
371