Cisco Broadband Cable Command Reference Guide

ip dhcp smart-relay
ip dhcp smart-relay
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Cisco Broadband Cable Command Reference Guide
Chapter 2 Cisco Cable Modem Termination System Commands
To monitor client retransmissions when address pool depletion occurs, use the ip dhcp smart-relay in
global configuration mode. To disable this function, use the no form of this command.
ip dhcp smart-relay
no ip dhcp smart-relay
Syntax Description This command has no keywords or arguments.
Defaults no ip dhcp smart-relay
Command Modes Global configuration
Command History
Usage Guidelines When relay detects excessive retransmissions, it changes the GIADDR, which in turn causes the server
to index a different address pool.
Examples The following example shows how to enable the insertion of DHCP smart relay agent information into
DHCP packets:
Related Commands
Release Modification
12.1(3a)EC This command was introduced.
12.2(4)BC1 Support was added to the Release 12.2 BC train.
Router# configure terminal
Router(config)# ip dhcp smart-relay
Command Description
cable helper-address Specifies a destination IP address for 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 relay-agent-option Enables the system to insert the CM MAC address into a DHCP
packet received from a CM or host and forward the packet to a DHCP
server.
cable source-verify Turns on CM upstream verification.
cable telco-return spd Enforces the telco-return CM to use a specific DHCP server.
dhcp-authenticate
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