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Command Reference
32
Release 12.0(1)T
ip dhcp relay information check
To configure a Cisco IOS Dynamic Host Configuration Protocol (DHCP) Server to validate the
relay agent information option in forwarded BOOTREPLY messages, use the ip dhcp relay
information check global configuration command. Use the no form of this command to disable an
information check.
ip dhcp relay information check
no ip dhcp relay information check
Syntax Description
This command has no arguments or keywords.
Defaults
The DHCP server checks relay information. Invalid messages are dropped.
Command Modes
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 12.0(1)T.
This command is used by cable modem termination systems. By default, DHCP checks relay
information. Invalid messages are dropped.
Examples
The following example configures the DHCP server to check that the relay agent information option
in forwarded BOOTREPLY messages is valid:
ip dhcp relay information check
Related Commands
ip dhcp relay information option
ip dhcp relay information policy