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IP Routing Features
Configuring DHCP Relay
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 3-21.Using the CLI To View the Switch MAC Address
■ Circuit ID: This nonconfigurable subfield identifies the port number of
the physical port through which the routing switch received a given DHCP
client request, and is necessary to identify if you want to configure an
Option 82 DHCP server to use the Circuit ID to select a DHCP policy to
assign to clients connected to the port. This number is the identity of the
inbound port. On ProCurve fixed-port switches, the port number used for
the Circuit ID is always the same as the physical port number shown on
the front of the switch.
For example, suppose you wanted port 10 on a given relay agent to support
no more than five DHCP clients simultaneously, you could configure the server
to allow only five IP addressing assignments at any one time for the circuit ID
(port) and remote ID (MAC address) corresponding to port 10 on the selected
relay agent.
Similarly, if you wanted to define specific ranges of addresses for clients on
different ports in the same VLAN, you could configure the server with the
range of IP addresses allowed for each circuit ID (port) associated with the
remote ID (IP address) for the selected VLAN.
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