SMC Networks SMC6724L3 manual Configuring Address Pools

DYNAMIC HOST CONFIGURATION PROTOCOL

Configuring Address Pools

You must configure IP address pools for each IP interface that will provide addresses to attached clients via the DHCP server.

Command Usage

•First configure address pools for the network interfaces. Then you can manually bind an address to a specific client if required. However, note that any static host address must fall within the range of an existing network address pool. You can configure up to 8 network address pools, and up to 32 manually bound host address pools (i.e., one address per host pool).

•When a client request is received, the switch first checks for a network address pool matching the gateway where the request originated (i.e., if the request was forwarded by a relay server). If there is no gateway in the client request (i.e., the request was not forwarded by a relay server), the switch searches for a network pool matching the interface through which the client request was received. It then searches for a manually configured host address that falls within the matching network pool. If no manually configured host address is found, it assigns an address from the matching network address pool. However, if no matching address pool is found the request is ignored.

•When searching for a manual binding, the switch compares the client identifier and then the hardware address for DHCP clients. Since BOOTP clients cannot transmit a client identifier, you must configure a hardware address for this host type. If no manual binding has been specified for a host entry with a hardware address or client identifier, the switch will assign an address from the first matching network pool.

•If the subnet mask is not specified for network or host address pools, the class A, B, or C natural mask is used (see page 3-178). The DHCP server assumes that all host addresses are available. You can exclude subsets of the address space by using the IP Excluded Address field on the DHCP Server General configuration page.

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