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Chapter 4 Policy-enabled networks 291
Using the Business Policy Switch 2000 Version 1.2
COPS overview
Common Open Policy Services (COPS) is important as a stateful protocol
between a policy server and a network device such as the BPS 2000. COPS is
implemented by using the Optivity Policy Services
*
(OPS), Version 1.2 or later,
which is a comprehensive network management application. OPS provides a
centralized management point for DiffServ policies. The policy server distributes
policies to edge devices and border routers. These edge devices police traffic
flows by marking packets and applying forwarding behaviors to the packets at the
network node.
Information is transferred using the Common Open Policy Services (COPS)
protocol, a query and response protocol that exchanges policy information
messages using the Transmission Control Protocol (TCP). COPS ensures
redundancy for devices to contact an alternate policy server should the primary
server fail. Specifically, COPS for Provisioning (COPS-PR) is used to download
information.
COPS is used to communicate with edge devices on the network. Some of the
benefits of the COPS protocol are:
•
It uses a client/server model for communication between the policy server and
the policy clients.
•
It uses TCP for messaging, reducing the resources it requires.
•
The policy server can send configuration information to the policy client, as
well as remove unneeded configuration information.
For information about OPS, go to the
www.nortelnetworks.com/documentation
URL. Then locate the specific software product (in this case, Optivity Network
Management and IP Services section).
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Страница 16: ...16 Contents 208700 B ...
Страница 22: ...22 Figures 208700 B ...
Страница 26: ...26 Tables 208700 B ...
Страница 32: ...32 Preface 208700 B ...
Страница 85: ...Chapter 1 The Business Policy Switch 2000 85 Using the Business Policy Switch 2000 Version 1 2 ...
Страница 86: ...86 Chapter 1 The Business Policy Switch 2000 208700 B ...
Страница 272: ...272 Chapter 3 Using the console interface 208700 B ...
Страница 292: ...292 Chapter 4 Policy enabled networks 208700 B ...
Страница 326: ...326 Chapter 5 Sample QoS configuration 208700 B ...
Страница 346: ...346 Appendix B Interoperability in a mixed stack configuration 208700 B ...
Страница 368: ...368 Appendix C Media dependent adapters 208700 B ...
Страница 386: ...386 Appendix E Connectors and pin assignments 208700 B ...