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Cisco uBR10012 Universal Broadband Router Software Configuration Guide
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Chapter1 Overview of CiscouBR10012 Universal Broadband Router Software Supported Software Features for the CiscouBR10012 Router
IP Routing Features
The CiscouBR10012router offers you several features to assist with IP routing configuration and
performance.
•Cable ARP Filter Enhancement
•Configurable Registration Timeout
•Host-to-Host Communication (Proxy Address Resolution Protocol)
•Integrated Time-of-Day Server
•PBR support for the Cisco uBR10012
•Supported Protocols
For additional information about IP routing, refer to these and other documents on Cisco.com:
•IP Routing Protocols section in the Cisco IOS IP Configuration Guide, Release 12.2
•IP Routed Protocols
•IP Technical Tips web page by Cisco’s Technical Assistance Center (TAC)
•Routing Protocols web page by Cisco’s Technical Assistance Center (TAC)
•Top Issues: IP Routing Protocols web page by Cisco’s Technical Assistance Center (TAC)
•Cisco’s Enabled Technologies web page

Cable ARP Filter Enhancement

The cable arp filter command, introduced with Cisco IOS Release 12.2(15)BC2b, enables service
providers to filter ARP request and reply packets. This prevents a large volume of such packets from
interfering with the other traffic on the cable network.
Cisco IOS Release 12.3(9a)BC introduces enhanced command option syntax for the cable arp filter
command, where number and window-size values are optional for reply-accept and request-send
settings.
To control the number of Address Resolution Protocol (ARP) packets that are allowable for each Service
ID (SID) on a cable interface, use the cable arp command in cable interface configuration mode. To stop
the filtering of ARP broadcasts for CMs, use the no form of this command.
cable arp filter {reply-accept number window-size | request-send number window-size}
no cable arp filter {reply-accept | request-send}
default cable arp filter {reply-accept | request-send}