Dhcp Snooping Dynamic Bindings - Ubiquiti EdgeSwitch ES-24-250W Administration Manual

EdgeSwitch Administration Guide
™

DHCP Snooping Dynamic Bindings

Use this page to view and clear dynamic bindings in the DHCP snooping bindings database. The DHCP
snooping feature uses DHCP messages to build and maintain the bindings database. The bindings database
includes data for clients only on untrusted ports. DHCP snooping creates a tentative binding from DHCP
DISCOVER and REQUEST messages. Tentative bindings tie a client to an interface (the interface where
the DHCP client message was received). Tentative bindings are completed when DHCP snooping learns
the client's IP address from a DHCP ACK message on a trusted port. DHCP snooping removes bindings in
response to DECLINE, RELEASE, and NACK messages. The DHCP snooping feature ignores the ACK messages
as a reply to the DHCP Inform messages received on trusted ports.
To access the DHCP Snooping Dynamic Bindings page, click Switching > DHCP Snooping > Base >
Dynamic Bindings in the navigation menu.
Field
Interface
MAC Address
VLAN ID
IP Address
Lease Time
Use the buttons to perform the following tasks:
• To remove one or more entries in the database, select each entry to delete and click Clear. You must
confirm the action before the entry is deleted.
• Click Refresh to refresh the page with the most current data from the switch.
To retain the changes across the switch's next power cycle, click System > Configuration Storage > Save.
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DHCP Snooping Dynamic Bindings
DHCP Snooping Dynamic Bindings Fields
Description
The interface on which the DHCP client message was received.
The MAC address associated with the DHCP client that sent the message. This is the key to the binding
database.
The VLAN ID of the client interface.
The IP address assigned to the client by the DHCP server.
The remaining IP address lease time for the client.
Configuring Switching Information
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