HP 3400CL-24G manual Example, ProCurveconfig# dhcp-relay option 82 append mgmt-vlan

Enhancements

Release M.08.94 Enhancements

Syntax: dhcp-relay option 82 < append replace drop > [ validate ] [ ip mac mgmt-vlan ]

[ ip mac mgmt-vlan ] : Specifies the remote ID suboption the routing switch will use in Option 82 fields added or appended to DHCP client packets. The choice depends on how you want to define DHCP policy areas in the client requests sent to the DHCP server. If a remote ID suboption is not configured, then the routing switch defaults to the mac option.

mgmt-vlan:Specifies the IP address of the (optional) Management VLAN configured on the routing switch. Requires that a Management VLAN is already configured on the switch. If the Management VLAN is multinetted, then the primary IP address configured for the Management VLAN is used for the remote ID.

ip: Specifies the IP address of the VLAN on which the client DHCP packet enters the routing switch. In the case of a multinetted VLAN, the remote ID suboption uses the IP address of the subnet on which the client request packet is received.

mac: Specifies the routing switch’s MAC address. (The MAC address used is the same MAC address that is assigned to all VLANs configured on the routing switch.)

(Default: mac)

Example

In the routing switch shown below, option 82 has been configured with mgmt-vlanfor the Remote ID.

ProCurve(config)# dhcp-relay option 82 append mgmt-vlan

The resulting effect on DHCP operation for clients X, Y, and Z is shown inTable 3.

DHCP Server “A”

DHCP Server “B”

DHCP Server “C”

Routing Switch

Management VLAN

VLAN 300

10.39.10.1 (secondary IP)

10.38.10.1 (primary IP)

VLAN 200

10.29.10.1

10.28.10.1

VLAN 100

10.15.10.1

Client “X”

Client “Y”

Client “Z”

On a routing switch that is the primary DHCP relay agent for a given client, if the (optional) Management VLAN is selected as the Remote ID suboption and is also multinetted, then the Remote ID for the client DHCP requests is the primary IP address of the Management VLAN.

Figure 12. DHCP Option 82 When Using the Management VLAN as the Remote ID Suboption

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