D-Link DGS-1510-28P User Manual - Page 172
Command Default Level, Usage Guideline, Example, option hex DHCP relay, Parameters, Default, Command
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DGS-1510 Series Gigabit Ethernet SmartPro Switch CLI Reference Guide Command Default Level Level: 12. Usage Guideline When the received interface of the packet has secondary addresses, by default, the relay agent set the gateway address field of the packet to the primary address of the interface. When smart relay is enabled, relay agent will count the number that a client retries sending of the DISCOVER message. The relay agent will switch the gateway address to secondary address of the received interface after three retries. Example This example shows how to enable the smart relay function Switch# configure terminal Switch(config)# ip dhcp smart-relay Switch(config)# 17-18 option hex (DHCP relay) This command is used to specify a DHCP option matching pattern for a DHCP class. Use the no command to delete the specified matching pattern for a DHCP class. option CODE hex PATTERN [*] [bitmask MASK] no option CODE hex PATTERN [*] [bitmask MASK] Parameters CODE PATTERN * MASK Specifies the DHCP option number. Specifies the hex pattern of the specified DHCP option. (Optional) Specifies not to match the remaining bits of the option. If not specified, the bit length of the PATTERN should be the same as the bit length of the option. (Optional) Specifies the hex bit mask for masking of the pattern. The masked pattern bits will be matched. If not specified, all bits specified by PATTERN will be checked. The bit set to FF will be checked. The input format should be the same as PATTERN. Default None. Command Mode DHCP Class Configuration Mode. Command Default Level Level: 12. Usage Guideline Use the ip dhcp class command with this command to define a DHCP class. The classes in a pool are matched in the sequence of the class configuration in a pool. With the option hex command, the user can specify the DHCP option code number with its matching pattern for a DHCP class. Multiple option patterns can be specified for a DHCP class. If the packet 169
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