Cisco Systems OL-4580-01 manual Defining the Hops Field Value for Forwarding Dhcp Messages

Chapter 8 Configuring the DHCP Relay Agent

Defining the Hops Field Value for Forwarding DHCP Messages

Defining the Hops Field Value for Forwarding DHCP Messages

The CSS forwards or discards a DHCP message based on the hops field value in the BOOTP header. When messages have values in the hops fields that exceed the maximum value set on the CSS, the CSS discards the message. Use the dhcp-agentmax-hopsglobal configuration command to set the maximum allowable number in the hops field. By default, the maximum allowable number is 4. You can set a number from 1 to 15.

For example, to set the maximum allowable value of 10, enter:

(config)# dhcp-agent max-hops 10

To reset the maximum allowable number in the hops field to the default of 4, enter:

(config)# no dhcp-agent max-hops

Displaying the DHCP Relay Configuration

Use the show dhcp-relay-agent global command to display the DHCP configuration information on the CSS. This command is available in all modes. For example:

#show dhcp-relay-agent global

Table 8-2describes the fields in the show dhcp-relay-agent global command output.

Table 8-2 Field Descriptions for the show dhcp-relay-agent global Command

		Field	Description
		Max Hops	The maximum allowable number in the hops field of the
			BOOTP header. The CSS does not forward packets with
			headers that contain a larger number.
		Number of circuits	The number of CSS circuits configured for DHCP.
		configured for DHCP
		Circuit	The circuit configured for DHCP.
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