Cisco Network Registrar
Encyclopedia
The Cisco Network Registrar (CNR) is a Cisco
software product that includes components for Domain Name System
(DNS) services, Dynamic Host Configuration Protocol
services, Trivial File Transfer Protocol
(TFTP) services, and Simple Network Management Protocol
functions. CNR provides a regional and local management structure and is supported on server hardware and software based on 32-bit and 64-bit architectures.
updates so that DHCP leases are reflected in DNS data, integration with directory services using LDAP Version 3, and ability to handle high request rates. It is also extensible.
authentication of zone transfers and update but does not support the data origination authentication features of DNSSEC
.
with about 50 employees. It was acquired by Cisco Systems
in early 1999 under a definitive agreement signed August 21, 1998.
Cisco
Cisco may refer to:Companies:*Cisco Systems, a computer networking company* Certis CISCO, corporatised entity of the former Commercial and Industrial Security Corporation in Singapore...
software product that includes components for Domain Name System
Domain name system
The Domain Name System is a hierarchical distributed naming system for computers, services, or any resource connected to the Internet or a private network. It associates various information with domain names assigned to each of the participating entities...
(DNS) services, Dynamic Host Configuration Protocol
Dynamic Host Configuration Protocol
The Dynamic Host Configuration Protocol is a network configuration protocol for hosts on Internet Protocol networks. Computers that are connected to IP networks must be configured before they can communicate with other hosts. The most essential information needed is an IP address, and a default...
services, Trivial File Transfer Protocol
Trivial File Transfer Protocol
Trivial File Transfer Protocol is a file transfer protocol known for its simplicity. It is generally used forautomated transfer of configuration or boot files between machines in a local environment....
(TFTP) services, and Simple Network Management Protocol
Simple Network Management Protocol
Simple Network Management Protocol is an "Internet-standard protocol for managing devices on IP networks. Devices that typically support SNMP include routers, switches, servers, workstations, printers, modem racks, and more." It is used mostly in network management systems to monitor...
functions. CNR provides a regional and local management structure and is supported on server hardware and software based on 32-bit and 64-bit architectures.
DHCP server
CNR is a DHCP/DHCPv6 server used by cable-based and similar network service providers because of its support for fail-over between redundant servers, Dynamic DNSDynamic DNS
Dynamic DNS or DDNS is a term used for the updating in real time of Internet Domain Name System name servers to keep up to date the active DNS configuration of their configured hostnames, addresses and other information....
updates so that DHCP leases are reflected in DNS data, integration with directory services using LDAP Version 3, and ability to handle high request rates. It is also extensible.
DNS server
The DNS Server in CNR 7.1 provides both authoritative and recursive service, supports incremental zone transfer, notify, and dynamic update, and can service IPv6 requests but does not originate IPv6 requests. It supports TSIGTSIG
TSIG is a computer networking protocol definedin RFC 2845. It is used primarily by the Domain Name System to provide a means of authenticating updates to a Dynamic DNS database, although it can also be used between servers and for regular queries...
authentication of zone transfers and update but does not support the data origination authentication features of DNSSEC
DNSSEC
The Domain Name System Security Extensions is a suite of Internet Engineering Task Force specifications for securing certain kinds of information provided by the Domain Name System as used on Internet Protocol networks...
.
Regional and local management
CNR provides for a "regional" cluster of servers and, optionally, up to 100 local clusters of servers. Overall service can be centrally controlled and managed but, in case of communications failure between the regional and local clusters, local clusters can still provide service to clients and can be locally managed. Fine grained administrative roles and privileges can be configured at both the regional level and at local clusters. The management and configuration of CNR are provided by both a command line and web interface. There are also facilities for pushing data (DNS zones, etc.) and configuration from the regional cluster to the local clusters and pulling data and configuration from local clusters to the regional cluster.History
CNR was originally the Network Registrar product of Corporation. American Internet was based in the United StatesUnited States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...
with about 50 employees. It was acquired by Cisco Systems
Cisco Systems
Cisco Systems, Inc. is an American multinational corporation headquartered in San Jose, California, United States, that designs and sells consumer electronics, networking, voice, and communications technology and services. Cisco has more than 70,000 employees and annual revenue of US$...
in early 1999 under a definitive agreement signed August 21, 1998.