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Configuring Agent Circuit ID Information
You use the relay-option-82 statement to enable insertion of option 82 information in DHCP packets. You must also specify at least the circuit-id statement to include the Agent Circuit ID suboption (suboption 1) of the DHCP relay agent information option.
If you specify the circuit-id statement, the format of the Agent Circuit ID information for Fast Ethernet (fe) or Gigabit Ethernet (ge) interfaces is one of the following, depending on your network configuration:
- For Fast Ethernet or Gigabit Ethernet interfaces that
do not use virtual local area networks (VLANs) or stacked VLANs (S-VLANs):(fe | ge)-fpc/pic/port
- For Fast Ethernet or Gigabit Ethernet interfaces that
use VLANs:(fe | ge)-fpc/pic/port:vlan-id
- For Fast Ethernet or Gigabit Ethernet interfaces that
use S-VLANs:(fe | ge)-fpc/pic/port:svlan-id-vlan-id
To enable insertion of option 82 information:
- Specify that you want to configure option 82 support. [edit forwarding-options dhcp-relay]user@host# edit relay-option-82
- Specify insertion of the Agent Circuit ID suboption. [edit forwarding-options dhcp-relay relay-option-82]user@host# set circuit-id
