HP 6125XLG R2306-HP 6125XLG Blade Switch Layer 3 - IP Services Configuration G - Page 77
Saving DHCP snooping entries
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Step 4. (Optional.) Configure a handling strategy for DHCP requests containing Option 82. Command dhcp snooping information strategy { drop | keep | replace } Remarks By default, the handling strategy is replace. 5. (Optional.) Configure the padding content and code type for the Circuit ID sub-option. dhcp snooping information circuit-id { [ vlan vlan-id ] string circuit-id | { normal | verbose [ node-identifier { mac | sysname | user-defined node-identifier } ] } [ format { ascii | hex } ] } By default, the padding format is normal and the code type is hex for the Circuit ID sub-option. 6. (Optional.) Configure the padding content and code type for the Remote ID sub-option. dhcp snooping information remote-id { normal [ format { ascii | hex } ] | [ vlan vlan-id ] string remote-id | sysname } By default, the padding format is normal and the code type is hex for the Remote ID sub-option. Saving DHCP snooping entries DHCP snooping entries cannot survive a reboot. If the DHCP snooping device is rebooted, security features (such as IP source guard) that use DHCP snooping entries to authenticate users reject requests from clients until new entries are learned. To avoid this problem, you can save DHCP snooping entries in a file so that DHCP snooping can read DHCP snooping entries from this file during a reboot. NOTE: If you disable DHCP snooping with the undo dhcp snooping enable command, the device deletes all DHCP snooping entries, including those stored in the specified file. To save DHCP snooping entries: Step 1. Enter system view. 2. Specify a file to save DHCP snooping entries. 3. (Optional.) Manually save DHCP snooping entries to the file. Command Remarks system-view N/A dhcp snooping binding database filename filename By default, no file is specified. DHCP snooping entries are saved to the specified file after you execute this command. The device does not update the file for a specified amount of time after a DHCP snooping entry changes. To change the value, use the dhcp snooping binding database update interval command. dhcp snooping binding database update now DHCP snooping entries are saved to the file each time this command is executed. 68