Dell PowerSwitch S4820T 9.50.1 Configuration Guide for the S4820T System - Page 319
Configuration Tasks, Excluding Addresses from the Address Pool, Specifying an Address Lease Time
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3. Specify the range of IP addresses from which the DHCP server may assign addresses. DHCP mode network network/prefix-length • network: the subnet address. • prefix-length: specifies the number of bits used for the network portion of the address you specify. The prefix-length range is from 17 to 31. 4. Display the current pool configuration. DHCP mode show config After an IP address is leased to a client, only that client may release the address. Dell Networking OS performs a IP + MAC source address validation to ensure that no client can release another clients address. This validation is a default behavior and is separate from IP+MAC source address validation. Configuration Tasks To configure DHCP, an administrator must first set up a DHCP server and provide it with configuration parameters and policy information including IP address ranges, lease length specifications, and configuration data that DHCP hosts need. Configuring the Dell system to be a DHCP server is a three-step process: 1. Configuring the Server for Automatic Address Allocation 2. Specifying a Default Gateway Related Configuration Tasks • Configure a Method of Hostname Resolution • Creating Manual Binding Entries • Debugging the DHCP Server • Using DHCP Clear Commands Excluding Addresses from the Address Pool The DHCP server assumes that all IP addresses in a DHCP address pool are available for assigning to DHCP clients. You must specify the IP address that the DHCP server should not assign to clients. To exclude an address, follow this step. • Exclude an address range from DHCP assignment. The exclusion applies to all configured pools. DHCP mode excluded-address Specifying an Address Lease Time To specify an address lease time, use the following command. • Specify an address lease time for the addresses in a pool. DHCP Dynamic Host Configuration Protocol (DHCP) 319
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