D-Link DFL-260 Product Manual - Page 233
IP Pools, DHCP Server behind interface, Specify DHCP Server Address, behind interface
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5.4. IP Pools Chapter 5. DHCP Services 5.4. IP Pools 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 NetDefendOS 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 NetDefendOS 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. Advanced IP Pool Options Advanced options available for IP Pool configuration are: Routing Table The routing table to be used for lookups when resolving the destination interfaces for the configured DHCP servers. 233