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Cisco Broadband Cable Command Reference Guide
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Chapter 2 Cisco CMTS Configuration Commands
ip dhcp smart-relay
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.
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:
Router#
configure terminal
Router(config)#
ip dhcp smart-relay
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.
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 dhcp-
authenticate
Enforces the telco-return CM to use a specific DHCP server.