Supported Platforms
Related Documentation
- EX Series, QFabric System, QFX Series standalone switches
- Example: Setting Up DHCP Option 82 with a Switch with No Relay Agent Between Clients and a DHCP Server
- Example: Setting Up DHCP Option 82 with a Switch as a Relay Agent Between Clients and a DHCP Server
- Setting Up DHCP Option 82 on the Switch with No Relay Agent Between Clients and DHCP Server (CLI Procedure)
- Setting Up DHCP Option 82 with the Switch as a Relay Agent Between Clients and DHCP Server (CLI Procedure)
- Additional Information
- RFC 3046, DHCP Relay Agent Information Option, at http://tools.ietf.org/html/rfc3046.
prefix (Circuit ID for Option 82)
Syntax
Hierarchy Level
- For platforms with ELS:[edit vlans forwarding-options dhcp-security option-82 circuit-id]
- For platforms without ELS:[edit ethernet-switching-options secure-access-port vlan (all | vlan-name) dhcp-option82 circuit-id],[edit forwarding-options helpers bootp dhcp-option82 circuit-id],[edit forwarding-options helpers bootp interface interface-name dhcp-option82 circuit-id]
Release Information
Statement introduced in Junos OS Release 9.3 for EX Series switches.
Statement introduced in Junos OS Release 11.3 for the QFX Series.
Hierarchy level [edit vlans vlan-name forwarding-options dhcp-security option-82 circuit-id] introduced in Junos OS Release 13.2X50-D10. (See Getting Started with Enhanced Layer 2 Software for information about ELS.)
Description
Configure an optional prefix for the circuit ID suboption in the DHCP option 82 information that is inserted by the switch into the packet header of a DHCP request before it forwards or relays the request to a DHCP server.
Default
If prefix is not explicitly specified, no prefix is appended to the circuit ID.
Options
When prefix is specified at the [edit vlans forwarding-options dhcp-security option-82 circuit-id] hierarchy level, the following options are available:
 | Note: See Setting Up DHCP Option 82 on the Switch with No Relay Agent Between Clients and DHCP Server (CLI Procedure) for more information about this configuration. |
- host-name hostname—Add the name of the host system (the switch) that is forwarding or relaying the DHCP request from the DHCP client to the DHCP server.
- routing-instance-name routing-instance-name—Add the name of the routing instance that is forwarding or relaying the DHCP request from the DHCP client to the DHCP server.
When prefix is specified at any of the other hierarchy levels, the only option available is hostname.
Required Privilege Level
system—To view this statement in the configuration.
system-control—To add this statement to the configuration.
Related Documentation
- EX Series, QFabric System, QFX Series standalone switches
- Example: Setting Up DHCP Option 82 with a Switch with No Relay Agent Between Clients and a DHCP Server
- Example: Setting Up DHCP Option 82 with a Switch as a Relay Agent Between Clients and a DHCP Server
- Setting Up DHCP Option 82 on the Switch with No Relay Agent Between Clients and DHCP Server (CLI Procedure)
- Setting Up DHCP Option 82 with the Switch as a Relay Agent Between Clients and DHCP Server (CLI Procedure)
- Additional Information
- RFC 3046, DHCP Relay Agent Information Option, at http://tools.ietf.org/html/rfc3046.
Published: 2014-04-23
Supported Platforms
Related Documentation
- EX Series, QFabric System, QFX Series standalone switches
- Example: Setting Up DHCP Option 82 with a Switch with No Relay Agent Between Clients and a DHCP Server
- Example: Setting Up DHCP Option 82 with a Switch as a Relay Agent Between Clients and a DHCP Server
- Setting Up DHCP Option 82 on the Switch with No Relay Agent Between Clients and DHCP Server (CLI Procedure)
- Setting Up DHCP Option 82 with the Switch as a Relay Agent Between Clients and DHCP Server (CLI Procedure)
- Additional Information
- RFC 3046, DHCP Relay Agent Information Option, at http://tools.ietf.org/html/rfc3046.
