Dell PowerConnect J-EX4200-24T Software Manual page 2719

To configure DHCP option 82:
NOTE: Replace values displayed in italics with values for your configuration.
Specify DHCP option 82 for the BOOTP server:
1.
On all interfaces that connect to the server:
[edit forwarding-options helpers bootp]
user@switch# set dhcp-option82
On a specific interface that connects to the server:
[edit forwarding-options helpers bootp]
user@switch# set interface ge-0/0/10 dhcp-option82
The remaining steps are optional. They show configurations for all interfaces; include
the specific interface designation to configure any of the following options on a
specific interface:
To configure a prefix for the circuit ID suboption (the prefix is always the hostname
2.
of the switch):
[edit forwarding-options helpers bootp]
user@switch# set dhcp-option82 circuit-id prefix hostname
To specify that the circuit ID suboption value contains the interface description rather
3.
than the interface name (the default):
[edit forwarding-options helpers bootp]
user@switch# set dhcp-option82 circuit-id use-interface-description
To specify that the circuit ID suboption value contains the VLAN ID rather than the
4.
VLAN name (the default):
[edit forwarding-options helpers bootp]
user@switch# set dhcp-option82 circuit-id use-vlan-id
To specify that the remote ID suboption is included in the DHCP option 82 information:
5.
[edit forwarding-options helpers bootp]
user@switch# set dhcp-option82 remote-id
To configure a prefix for the remote ID suboption (here, the prefix is the MAC address
6.
of the switch):
[edit forwarding-options helpers bootp]
user@switch# set dhcp-option82 remote-id prefix mac
To specify that the prefix for the remote ID suboption is the hostname of the switch
7.
rather than the MAC address of the switch (the default):
[edit forwarding-options helpers bootp]
user@switch# set dhcp-option82 remote-id prefix hostname
To specify that the remote ID suboption value contains the interface description:
8.
[edit forwarding-options helpers bootp]
user@switch# set dhcp-option82 remote-id use-interface-description
Chapter 95: Configuring Port Security
2647