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Chapter 2
Cisco CMTS Configuration Commands
ip dhcp smart-relay
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.
Syntax Description
This command has no keywords or arguments.
Defaults
no ip dhcp smart-relay
Command Modes
Global configuration
Command History
Release
12.1(3a)EC
12.2(4)BC1
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:
Router# configure terminal
Router(config)# ip dhcp smart-relay
Related Commands
Command
cable helper-address
cable dhcp-giaddr
cable relay-agent-option
cable source-verify
cable telco-return spd dhcp-
authenticate
OL-1581-08
ip dhcp smart-relay
no ip dhcp smart-relay
Modification
This command was introduced.
Support was added to the Release 12.2 BC train.
Description
Specifies a destination IP address for UDP broadcast (DHCP)
packets.
Modifies the GIADDR field of DHCPDISCOVER and
DHCPREQUEST packets with a Relay IP address before they are
forwarded to the DHCP server.
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.
Turns on CM upstream verification.
Enforces the telco-return CM to use a specific DHCP server.
Cisco Broadband Cable Command Reference Guide
ip dhcp smart-relay
2-443
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