This preface explains the objectives, software options, intended audience, and organization of the Cisco uBR10012 Universal Broadband Router Software Configuration Guide, which describes the following release trains:
Cisco IOS Release 12.1 BC, 12.2 BC, and 12.3 BC
Cisco IOS Release 12.2 CY
This preface also defines this document’s conventions for conveying instructions and information.
Document Revision History
The Document Revision History table below records technical changes to this document.
Table 1 Document Revision History
September 30, 2005
Incorporated new features and enhancements introduced in Cisco IOS Release 12.3(13a)BC. Added Document Revision History table.
This guide describes the procedures necessary to configure, maintain, and troubleshoot the initial software configuration for the Cisco uBR10012 universal broadband router. This guide also directs you to other closely related documentation for additional features and optimization.
The Cisco uBR10000 series CMTS solutions allow cable companies, Internet service providers (ISPs), and others to allocate channel capacity for Internet access services using a broadband radio frequency (RF) cable plant. The Cisco uBR10012 router sustains two-way downstream and upstream traffic over Data-over-Cable Service Interface Specifications (DOCSIS)-based cable modems (CMs) that support 6 MHz National Television Systems Committee (NTSC) operations.
This guide is intended for system administrators and support engineers who configure and maintain the Cisco uBR10012 router. Many different delivery models exist for Cisco uBR10000 series equipment:
In smaller networks, a single service provider manages all equipment and infrastructure.
In larger networks, multiple service operators (MSOs) and ISPs share responsibility for provisioning and managing the cable plant and IP network.
How the MSO and ISP divide responsibilities depends on the service model. In some cases, the MSO maintains and operates the cable plant and attached CMs and set-top boxes (STBs), and the ISP owns, operates, and maintains the regional network and IP infrastructure beyond the cable distribution hub. In other cases, the Cable Modem Termination System (CMTS) and RF customer premises equipment (CPE) are viewed as part of the networking infrastructure, and the ISP maintains control for provisioning and managing DOCSIS functionality.
Note This guide considers the MSO and ISP as a single service principle with responsibility to provision and manage DOCSIS-based cable modems and STBs. This guide assumes that administrators are familiar with Cisco uBR10000 series hardware, DOCSIS requirements, and networking.
This guide focuses on configuration of Cisco IOS software for the Cisco uBR10012 router. Table 2 summarizes the chapters and procedures in this guide. These chapters are presented in the general sequence used in a router installation and configuration. However, this sequence is also affected by your network configuration and other factors.
Provides instructions to make basic configurations to the Cisco uBR10000 series Cable Modem Termination System (CMTS) using AutoInstall, the Setup facility, or manual configuration mode. Includes sample Cisco uBR10012 router software configurations.
Note Complete the configurations in this chapter prior to attempting additional configurations later in this guide.
Provides a number of procedures that you can implement after you have completed upstream and downstream cable interface configurations to manage operations of your cable modems in the hybrid fiber-coaxial network.
DOCSIS—Data-over-Cable Service Interface Specification
DS—downstream—data flowing from the internet backbone towards the cable network is considered to be moving in the downstream direction. Also refers to data flowing from the CMTS towards the CM is moving in the downstream direction.
DSP—digital signal processor
DSR—data set ready
DSU—data service unit
DTE—data terminal equipment
DTR—data terminal ready
FRU—field-replaceable unit (router components that do not require replacement by a Cisco certified service provider)
Logical Interface—A group of one or more upstream and one or more downstream cable ports
MAC—Media Access Control
MAP—upstream bandwidth allocation map
Mbps—Mega-bits per second
MPLS—Multiprotocol label switching
nrt-VBR—non-real-time variable bit rate
NTSC—National Television Standards Committee
NVRAM—nonvolatile random-access memory
OAM AIS—Operation, Administration, and Maintenance alarm indication signal
OIR—online insertion and removal
PCI—peripheral component interconnect bus
PCMCIA—Personal Computer Memory Card International Association
PHS—payload header suppression
PHY—Physical Interface Chip
PRE—Performance Routing Engine
QAM—Quadrature Amplitude Modulation
QoS—quality of service
QPSK—Quadrature Phase Shift Keying
rcp—remote copy protocol
RFI—radio frequency interference
RIP—Routing Information Protocol
RISC—Reduced Instruction Set Computer
ROM—read only memory
RPR(+)—Route Processor Redundancy (plus)
RTS—Request To Send
SDRAM—synchronous dynamic random-access memory
SFID—Service Flow Identifier
SIMM—single in-line memory module
SM—subscriber modem or spectrum manager
SMI—single-mode intermediate reach
SNMP—Simple Network Management Protocol
TCP/IP—Transmission Control Protocol/Internet Protocol
TFTP—Trivial File Transfer Protocol
ToS—Type of Service
UBR—unspecified bit rate
UDP—User Datagram Protocol
US—upstream—Data flowing from the cable network towards the internet backbone is considered to be moving in the upstream direction. Also, data flowing from the CM towards the CMTS is moving in the upstream direction.
VPN—Virtual Private Network
The following references provide additional information related to the Cisco uBR10012 router.
Cisco uBR7200 Series Routers and Cisco uBR10012 Universal Broadband Router Documentation Roadmap
Data-over-Cable Service Interface Specifications Radio Frequency Interface Specification, version 1.1
1.Not all supported standards are listed.
The Cisco uBR10012 router supports the following categories of Management Information Bases (MIBs):
Cable-specific MIBs—Provide information about the cable interfaces and related information on the Cisco uBR10012 router. They include both Data-over-Cable Service Interface Specifications (DOCSIS)-specific MIBs and enterprise MIBs specific to Cisco. If your network management applications have not already been configured for the Cisco uBR10012 router, these MIBs must be loaded. The Cisco uBR10012 router and CMTS supports DOCSIS 1.1 MIBs.
The Cisco uBR10012 router supports objects related to QoS support for scheduler of DOCSIS-compliant RF interfaces in the CMTS.
Cisco platform and network-layer enterprise MIBs—Common across most Cisco router platforms. If your network management applications are already configured to support other Cisco routers, such as the Cisco 2600 series router, no further configuration is needed unless the version of Cisco IOS software being used has updated these MIBs.
Simple Network Management Protocol (SNMP) standard MIBs—These MIBs are required by any agent supporting SNMPv1 or SNMPv2 network management. The SNMP MIBs improve object support for SNMP traps. This aids in network management. Traps are the mechanisms used to automatically send alarms for certain network events.
Deprecated MIBs—Supported in earlier releases of Cisco IOS software but have been replaced by more standardized, scalable MIBs. Network Management applications and scripts should convert to the replacement MIBs as soon as possible.
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Obtaining Technical Assistance
Cisco provides Cisco.com as a starting point for all technical assistance. Customers and partners can obtain documentation, troubleshooting tips, and sample configurations from online tools by using the Cisco Technical Assistance Center (TAC) Web site. Cisco.com registered users have complete access to the technical support resources on the Cisco TAC Web site.
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The Cisco TAC is available to all customers who need technical assistance with a Cisco product, technology, or solution. Two types of support are available through the Cisco TAC:
the Cisco TAC Web site
Note In addition, be sure to familiarize yourself with TAC’s Cisco uBR10012 Product Support Page at http://www.cisco.com/cisco/web/support/index.html.
the Cisco TAC Escalation Center
Inquiries to Cisco TAC are categorized according to the urgency of the issue:
Priority level 4 (P4)—You need information or assistance concerning Cisco product capabilities, product installation, or basic product configuration.
Priority level 3 (P3)—Your network performance is degraded. Network functionality is noticeably impaired, but most business operations continue.
Priority level 2 (P2)—Your production network is severely degraded, affecting significant aspects of business operations. No workaround is available.
Priority level 1 (P1)—Your production network is down, and a critical impact to business operations will occur if service is not restored quickly. No workaround is available.
Which Cisco TAC resource you choose is based on the priority of the problem and the conditions of service contracts, when applicable.
Cisco TAC Web Site
The Cisco TAC Web site allows you to resolve P3 and P4 issues yourself, saving both cost and time. The site provides around-the-clock access to online tools, knowledge bases, and software. To access the Cisco TAC Web site, go to the following URL:
All customers, partners, and resellers who have a valid Cisco services contract have complete access to the technical support resources on the Cisco TAC Web site. The Cisco TAC Web site requires a Cisco.com login ID and password. If you have a valid service contract but do not have a login ID or password, go to the following URL to register:
If you have Internet access, it is recommended that you open P3 and P4 cases through the Cisco TAC Web site.
Cisco TAC Escalation Center
The Cisco TAC Escalation Center addresses issues that are classified as priority level 1 or priority level 2; these classifications are assigned when severe network degradation significantly impacts business operations. When you contact the TAC Escalation Center with a P1 or P2 problem, a Cisco TAC engineer will automatically open a case.
To obtain a directory of toll-free Cisco TAC telephone numbers for your country, go to the following URL:
Before calling, please check with your network operations center to determine the level of Cisco support services to which your company is entitled; for example, SMARTnet, SMARTnet Onsite, or Network Supported Accounts (NSA). In addition, please have available your service agreement number and your product serial number.