ProCurve 2610-PWR Technical Information download pdf (Page 290)

IP Routing Features

Configuring DHCP Relay

Option 82 Field Content

The Remote ID and Circuit ID subfields comprise the Option 82 field a relay

agent appends to client requests. A DHCP server configured to apply a

different IP addressing policy to different areas of a network uses the values

in these subfields to determine which DHCP policy to apply to a given client

request.

■ Remote ID: This configurable subfield identifies a policy area that

comprises either the routing switch as a whole (by using the routing

switch MAC address) or an individual VLAN configured on the routing

switch (by using the IP address of the VLAN receiving the client

request).

• Use the IP address option if the server will apply different IP

addressing policies to DHCP client requests from ports in

different VLANs on the same routing switch.

• Use the MAC address option if, on a given routing switch, it does

not matter to the DHCP server which VLAN is the source of a

client request (that is, use the MAC address option if the IP

addressing policies supported by the target DHCP server do not

distinguish between client requests from ports in different VLANs

in the same routing switch)

To view the MAC address for a given routing switch, execute the show

system-information command in the CLI.

Switch MAC Address

Figure 7-12.Using the CLI To View the Switch MAC Address

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ProCurve 2610-PWR Technical Information Page 290