Cisco CNS Address and Name Registrar

Cisco CNS Address and Name Registrar 2.0 Data Sheet

Data Sheet

Cisco Address
and Name Registrar 2.0


Cisco Address and Name Registrar (ANR) provides an IP address management solution to ease the inherent complexities of IP address distribution, configuration, and monitoring. Cisco ANR release 2.0 specifically meets the requirements of cable providers by delivering an automated system to reduce administrative processes, easing the management of scarce IP addresses.

Cable providers are faced with increasingly sophisticated IP addressing requirements, driven by both a rising number of network subscribers and a desire to manage disparate blocks of IP addresses at the network edge (such as in managed access scenarios). Today, network operations personnel rely heavily on manual processes for IP address tracking and configuration. Even the most knowledgeable network engineers find accurate utilization reporting challenging at best. Through tools as simplistic as spreadsheets and well-paid system administrators to keep these up-to-date, management of the IP address space has become an inefficient and time-consuming chore.

Cisco ANR 2.0 simplifies IP address management by using customized policies to drive intelligent IP subnet allocation and reclamation decisions. By taking advantage of the awareness of IP allocation, usage, and network configuration, Cisco ANR turns complex IP utilization data into meaningful management information. The result is efficient IP usage and distribution.

Through Cisco ANR, an administrator can assign an owner to a particular address block, and distribute that address block across the network in a customized manner. Cisco ANR then monitors that IP address space, tracks utilization, and performs customizable actions based on specified triggers.

By automating time consuming manual tasks, Cisco ANR lowers the cost of ownership of the solution, and frees up the valuable time of System Administrators to allow more strategic planning and management for the cable provider. A more detailed explanation of Cisco ANR functionality follows in the feature overview.

Key Features

Cisco ANR simplifies IP address management by offering the following features:

  • Address space allocation and reclamation
    • Cisco ANR dynamically allocates and reclaims IP address space for multiple administratively assigned owners.
    • Cisco ANR supports the creation and management of multiple IP address blocks for each owner, allocating subnetted address space to a Cisco Network Registrar (CNR) Dynamic Host Control Protocol (DHCP) server and among cable modem termination system (CMTS) interfaces as defined by user-customized policy and parameters.
    • Cisco ANR implements event triggers to perform customizable actions (including "alert administrator" and "allocate additional IP address space") when configurable IP utilization thresholds have been reached.
  • CNR configuration
    • Cisco ANR adds DHCP scopes to the CNR server upon IP address space allocation.
    • Cisco ANR uses owner-specific templates to assign policies and selection tags to new DHCP scopes in CNR.
    • Synchronization is maintained between Cisco ANR and CNR insuring that Cisco ANR will recognize any manual changes made to a CNR server.
    • Cisco ANR supports IP address allocation into DHCP failover configurations (both simple and symmetric).
  • Cable Modem Termination System (CMTS) configuration and Multiprotocol Label Switching (MPLS) virtual private network (VPN) integration
    • Cisco ANR leverages the sub-interface features of Cisco IOS as a way to organize IP address space on the CMTS for each administratively assigned IP owner
    • Cisco ANR creates a new sub-interface per owner on the appropriate CMTS interface when it initially allocates IP address space. Additional IP address space for a known owner is added as a secondary IP address to that owner's existing sub-interface.
    • Synchronization is maintained between Cisco ANR and CMTSs insuring that Cisco ANR will recognize manual changes made to a CMTS.
    • Cisco ANR can fully interoperate in an MPLS-VPN environment working in conjunction with the Cisco Virtual Private Network Solutions Center (VPN-SC) to configure CMTSs for MPLS VPN tunnels across the network.
  • Utilization reporting
    • Cisco ANR provides IP address utilization information on a per DHCP scope, per CMTS, per interface, per address block, and per owner basis.
    • Utilization data provided by Cisco ANR can be used to predict trends in IP consumption by monitoring and tracking IP usage over customized time periods.
  • User interfaces
    • Configuration command-line interface (CLI)—A CLI is provided for administration.
    • Server-side application programming interface (API)—Cisco ANR provides a Java API that is implemented using the Simple Object Access Protocol (SOAP) standard on top of Extensible Markup Language (XML). The API can be used to extend and link Cisco ANR to existing business processes and tools already in use in the network.


  • Significantly reduces time consuming administrative tasks—Cisco ANR monitors, tracks, distributes, and manages IP address space, even in the most complicated network configurations. Cisco ANR also automatically updates hardware and DHCP configurations to reflect IP address allocation decisions. Automating IP address management improves not only the accuracy of data, but also increases operational efficiency, and reduces the costly manual processes currently in place.
  • Drives efficient use of scarce IP address resources—Cisco ANR dynamically suggests ways to improve IP allocation in the network by proactively monitoring IP utilization. The customizable Cisco ANR rules engine will send email to alert administrators when IP utilization is too low or too high, and IP blocks can be moved in response. This real-time monitoring and response will allow maximum coverage and efficiency of the IP address space, reducing network outages and downtime.
  • Assists with IP trending analysis and demand prediction—Cisco ANR tracks IP consumption and correlates this data across disparate networks, CMTS hardware, and IP owners. Both real-time and historic utilization information can be used to advantage to monitor and predict trends in IP consumption. With an understanding of past IP allocation and usage, administrators can use this vital information to track and trend network growth and future demand for IP address requirements.
  • Adds IP address management functionality to a complete end-to-end provisioning solution—Cisco ANR integrates with CNR, Cisco Subscriber Registration Center Device Provisioning Registrar (C DPR), Cisco VPN-SC, Cisco Ecosystem Partner Applications, and existing Operation and Business Support Systems (OSS/BSS) to provide a complete device and network provisioning solution.

Platform Support and System Requirements

Cisco ANR 2.0 is supported on the Sun Solaris 8 operating system. The minimum recommended configuration for Cisco ANR installation is a Sun Ultra 5 workstation with 256 MB of RAM, 512 MB of swap space, and 120 MB of disk space.

Additional Information

For additional information about Cisco ANR, please visit the Network Management section of or contact your Cisco Account Manager.

For current Solaris-Based Network Management product hardware requirements, please refer to the Sun Cisco Optimized Platform Recommendations Table for hardware and part numbering ordering information.