Web Management Guide-R01

Table Of Contents
Chapter 12
| Security Measures
DHCP Snooping
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Circuit ID – Specifies DHCP Option 82 circuit ID suboption information.
Mode – Specifies the default string “VLAN-Unit-Port” or an arbitrary string.
(Default: VLAN-Unit-Port)
Value – An arbitrary string inserted into the circuit identifier field.
(Range: 1-32 characters)
TR101 VLAN Field – Adds “:VLAN” in TR101 field for untagged packets.
Web Interface
To configure global settings for DHCP Snooping:
1. Click IP Service, DHCP, Snooping.
2. Select Configure Interface from the Step list.
3. Set any ports within the local network or firewall to trusted.
4. Specify the mode used for sending circuit ID information, and an arbitrary
string if required.
5. Click Apply
Figure 222: Configuring the Port Mode for DHCP Snooping
Displaying DHCP
Snooping Binding
Information
Use the Security > DHCP Snooping (Show Information) page to display entries in
the binding table.
Parameters
These parameters are displayed:
MAC Address – Physical address associated with the entry.
IP Address – IP address corresponding to the client.
Lease Time – The time for which this IP address is leased to the client.
Type – Entry types include: