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Vendor ID-Identifies the vendor of the host. Name or that the VLAN ID be used rather than the VLAN name. You can also specify that the interface description be used rather than the interface Prefix option, the hostname for the switching device is used as the prefix for example, device1:ge-0/0/10:vlan1, Use the prefix option to add an optional prefix to the circuit ID. If the request packet is received on a Layerģ interface, the circuit ID is just the interface name-for example, ge-0/0/10. Is the interface name and vlan1 is the VLAN name. With the two elements separated by a colon-for example, ge-0/0/10:vlan1, where ge-0/0/10 The circuit ID contains the interface name and VLAN name, These suboptions are fields in the packet header:Ĭircuit ID-Identifies the circuit (interface or VLAN) on the switching device Option 82 as implemented on a switching device comprises the suboptions circuit ID, When it receives requests containing option 82 information, it does not use the informationįor setting parameters and it does not echo the information in its response message. If the DHCP server is not configured to accept option 82, then

To use the DHCP option 82 feature, you must ensure that the DHCP server is configured The switching device forwards the response packet to the client. The switching device strips the option 82 information from the response packet. It does not alter the option 82 information. Sends a response to the switching device.

The server uses the DHCP option 82 information to formulate its reply and The switching device forwards (or relays) the request to the DHCP server. The switching device receives the request and inserts the option 82 information Occurs when a DHCP client sends a DHCP request: If option 82 is enabled on a VLAN or bridge domain, the following sequence of events Trusted interfaces as well as untrusted interfaces. On EX4300 switches, DHCP option 82 information is added to DHCP packets received on