Cisco Systems UBR10012 Cisco IOS Release 12.3 BC Command-line Enhancements, DHCP Servers and Feature Support

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Cisco uBR10012 Universal Broadband Router Software Configuration Guide

OL-1520-08

Chapter1 Overview of CiscouBR10012 Universal Broadband Router Software

Supported Software Features for the CiscouBR10012 Router

Cisco IOS Release 12.3 BC Command-line Enhancements

This section describes general Cisco IOS commands introduced or enhanced in Cisco IOS Release

12.3(9a)BC and later releases in the 12.3 BC release train. Also refer to additional feature descriptions

for new or enhanced commands that support specific new features.

•Cisco IOS Release 12.3(13a)BC Command-Line Interface (CLI) Enhancements

•Cisco IOS Release 12.3(9a)BC Command-Line Interface (CLI) Enhancements

Cisco IOS release 12.3(13a)BC introduces several new or enhanced commands. For this release, these

feature-specific commands or enhancements are described with the features they support. Refer to

additional feature descriptions in this document for additional information.

CiscoIOS Release 12.3(9a)BC introduces or enhances the following CLI commands for the

CiscouBR10012 router:

•cable arp filter (See Cable ARP Filter Enhancement)

•cable logging layer2events

•cable source-verify

•show cable tech-support

•show controllers cable

•show tech-support

For additional information about these command changes, refer to these resources:

•Cisco Broadband Cable Command Reference Guide

http://www.cisco.com/univercd/cc/td/doc/product/cable/bbccmref/index.htm

DHCP Servers and Feature Support

Cisco IOS software supports multiple DHCP features and server functions on the network for the

CiscouBR10012 router:

•DHCP MAC Address Exclusion List for cable-source verify dhcp Command

•Integrated DHCP Server

Cisco IOS Release 12.3(13a)BC introduces the ability to exclude trusted MAC addresses from standard

DHCP source verification checks, as supported in previous Cisco IOS releases for the Cisco CMTS. This

feature enables packets from trusted MAC addresses to pass when otherwise packets would be rejected

with standard DHCP source verification. This feature overrides the cable source-verify command on

the Cisco CMTS for the specified MAC address, yet maintains overall support for standard and enabled

DHCP source verification processes. This feature is supported on Performance Routing Engine 1 (PRE1)

and PRE2 modules on the Cisco uBR10012 router chassis.