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Cisco Broadband Cable Command Reference Guide
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Chapter 2 Cisco CMTS Configuration Commands
cable relay-agent-option
cable relay-agent-option
To enable the system to insert the CM MAC address into a Dynamic Host Configuration Protocol
(DHCP) packet received from a CM or host and forward the packet to a DHCP server, use the
cable
relay-agent-option
command in cable interface configuration mode. To disable MAC address insertion,
use the
no
form of this command.
cable relay-agent-option
no cable relay-agent-option
Syntax Description
This command has no keywords or arguments.
Defaults
no cable relay-agent-option
Command Modes
Interface configuration (cable interface only)
Command History
Usage Guidelines
This functionality enables the use of DHCP Option 82 to allow a DHCP server to identify the CM
sending the request and to initiate the appropriate action based on this information. On Cisco IOS
Release 12.0 and later releases, use the
ip dhcp relay information option
command to enable Option 82
processing.
Examples
The following example shows how to enable the insertion of DHCP relay agent information into DHCP
packets:
router(config-if)#
cable relay-agent-option
Related Commands
Release
Modification
11.3 NA
This command was introduced.
12.0 mainline,
12.1(2)EC1,
12.0(10) SC
This command was made obsolete and was replaced by the
ip dhcp relay
information option
command.
Command
Description
cable helper-address
Specifies a destination IP address for User Datagram Protocol (UDP)
broadcast (DHCP) packets.
cable dhcp-giaddr
Modifies the GIADDR field of DHCPDISCOVER and
DHCPREQUEST packets with a Relay IP address before they are
forwarded to the DHCP server.
cable source-verify
Turns on CM upstream verification.
Содержание Broadband Cable
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