Boyle, J.; Cohen, R.; Durham, D.; Herzog, S.; Rajan, R.; Sastry, A. The COPS (Common Open Policy Service) Protocol, RFC2748, Jan. 2000.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....give guarantees on drop probability and bandwidth respectively. Whilst these proposals address the mechanisms for requesting differentiated service from the network, little progress has so far been made on methods to express policy to the network. The COPS (COMMON OPEN POLICY SERVICE) proposals [6, 7] attempt to do so for Integrated Services, but there has been little equivalent effort for Differentiated Services. In summary, current protocols do not allow for the route traffic will take to be specified in terms of the quality of service the traffic will receive. Management of service level ....

J. Boyle, R. Cohen, D. Durham, S. Herzog, R. Rajan, and A. Sastry. The COPS (Common Open Policy Service) Protocol. RFC 2748, IETF, January 2000.

....storage. At network border points, PEPs act as a police to accept or deny requests appropriately. Through secure and reliable channels (such as telecommunication out of band signaling network) PDPs and PEPs can exchange policy information with the Common Open Policy Service protocol (COPS) [2]. At the user s end, with the Intelligent IC card and other hardware technologies, wireless devices have some embedded functionalities that cannot be tampered with. The user end policies have three levels. First, providers can deploy policies in terminals which users cannot change. Unlike desktop ....

J. Boyle, R. Cohen, D. Durham, S. Herzog, R. Raja, A. Sastry, The COPS (Common Open Policy Service) Protocol, IETF RFC 2748, Proposed Standard, January 2000

....will be necessary for a BMP to communicate with routers in the BMP s domain. A BMP uses this protocol to communicate QoS configuration parameters with routers, and with policy enforcement agency in the same domain. A BMP can communicate with network devices through standard protocol called COPS [1] which allows service Request, Decision and Report messages. Inter domain BMP communication: An inter domain protocol is used to communicate with transacting BMPs about resource allocation. Data interfaces used for the BMP protocols include routing tables, required to obtain inter domain ....

BOYLE,J.,COHEN,R.,DURHAM,D.,HERZOG,S.,RAJAN,R.,AND SASTRY, A. The COPS (Common Open Policy Service) protocol. Request for Comments 2748, Internet Engineering Task Force, January 2000.

....reservation for individual connections. Figure 5 depicts a typical configuration for an RSVP enabled network. In this diagram, a reservation message from source to destination is transmitted using RSVP. At each router, this message is intercepted and a policy request is made using the COPS [13] protocol. The COPS request is handled by a policy server and an admission control decision is made by that server. If the decision is positive, the response to the router indicates that resources should be reserved for the requesting connection, and the RSVP reservation message is propagated ....

J. Boyle et at., The COPS (Common Open Policy Service) Protocol, 1ETF RFC 2748, January 2000.

....COPS that allow a centralized management of a network. For the mobility problem, we implement a soft handover mechanism in COPS. And finally, we use Extensible Authentication Protocol to perform the authentication of the users in the network. 1. Common Open Policy Services COPS, defined in [1], describe a model for the exchange of administration s messages in a network. This protocol allows a domain centralized management (set of computers) It uses a client server model where the client (routers, switches. sends requests, updates, and deletes to the server and this one returns the ....

Boyle, J., R. Cohen, D. Durham, S. Herzog, R. Raja, et A. Sastry, The COPS (Common Open Policy Service) Protocol, RFC 2748, Janvier 2000

....theDi#IH v testbed provides a proof of concept of the applicability of the PP discipline in real networks. The ability to control the average queueing delay and throughput ofdi# rent classes through the p i parameters provides a flexible way for higher level control agents, such as policy servers [15] or bandwidth brokers in the Internet2 QBone architecture [16] to manage the level of servicedi#flw[k iation between classes in dynamic networks. The rest of the paper is organized as follows. Section 2 describes the model of the PP scheduling discipline and presents an e#cient algorithm for ....

D. Durham, J. Boyle, R. Cohen, S. Herzog, R. Rajan, A. Sastry, The COPS (common open policy service) protocol, IETF RFC 2748, January 2000.

....time as well as admission control at run time. In addition to forwarding packets, the edge routers participate in the flow establishment. They are responsible for communicating with the DRM. For communication between edge routers and the DRM, we use the policy client server protocol, such as COPS [2]. Upon receiving a flow admission request, the ingress router forwards it requests to the DRM. The DRM invokes its admission control function, and sends a policy (for example, the admission decision and traffic shaping policing parameters) to the edge router. Once a flow is admitted, the edge ....

J. Boyle, R. Cohen, D. Durham, S. Herzog, R. Rajan, and A. Sastry, The COPS (Common Open Policy Service) Protocol, Internet-Draft, Feb. 1999.

....and core routers are PowerRail Routing Switches. In addition to forwarding packets, the edge routers participate in the ow establishment. They are responsible for communicating with the DRM. For communication between edge routers and the DRM, we use the policy client server protocol, such as COPS [26]. Upon receiving a ow admission request, the ingress router forwards it requests to the DRM. The DRM invoke its admission control function, and sends a policy (for example, the admission decision and trac 14 shaping policing parameters) to the edge router. The edge router will set the policies ....

J. Boyle, R. Cohen, D. Durham, S. Herzog, R. Rajan, A. Sastry, \The COPS (Common Open Policy Service) Protocol," Internet-Draft, Feb. 1999.

....(e.g. 40] but not for multiple flow types. The co reservation of multiple resource types has been investigated in the multimedia community: see, for example, 27, 29, 28] However, these techniques are specialized to specific resource types. The Common Open Policy Service (COPS) protocol [4] is a simple protocol for the exchange of policy information between a Policy Decision Point (PDP) and its communication peer, called Policy Enforcement Point (PEP) Communication between PEP and PDP is done by using a persistent TCP connection in the form of a stateful request decision exchange. ....

J. Boyle, R. Cohen, D. Durham, S. Herzog, R. Rajan, and A. Sastry. The COPS (Common Open Policy Service) protocol. IETF RFC 2748, January 2000.

....DiffServ testbed provides a proof of concept of the applicability of the PP discipline in real networks. The ability to control the average queueing delay and throughput of different classes through the p i parameters provides a flexible way for higher level control agents, such as policy servers [15] or Bandwidth Brokers in the Internet2 QBone architecture [16] to manage the level of service differentiation between classes in dynamic networks. The rest of the paper is organized as follows. Section II describes the model of the PP scheduling discipline and presents an efficient algorithm for ....

D. Durham, J. Boyle, R. Cohen, S. Herzog, R. Rajan and A. Sastry, The COPS (Common Open Policy Service) Protocol, IETF RFC 2748, Jan 2000.

.... although classification schemes are being explored within the context of DIFFSERV [Blake98, Nichols98] as well as outside the DIFFSERV system [Clark98, Feng99b, Cao00] Policy systems have existed for a long time and a more recent example for the Internet is the Common Open Policy Service (COPS) Boyle00b, Boyle00a] system written to describe the client and server service models in the INTSERV environment. A similar mechanism is expected to arise for DIFFSERV [Bernet99] Such systems may specify the structure of policy in a mechanism that allows complex policy specification but using a formal ....

J. Boyle, R. Cohen, D. Durham, S. Herzog, R. Rajan, and A. Sastry. The COPS (Common Open Policy Service) Protocol. RFC 2748, IETF, January 2000. (p 221)

....is triggered to send some control information to the relevant policy decision point. According to the different implementation scenarios, this interface may be based on LDAP, Command Line, or SNMP. 3) QoS Policy Deploy Interface: IETF define the Common Open Policy Service (COPS) protocol [7] for the communication of policy requests and decisions between a Policy Target and a Policy Consumer. COPS is a client server protocol in which a network device acts as a COPS client. The policy capable network device in the future will implement the COPS interface. However, for those devices ....

J. Boyle, R. Cohen, D. Durham, S. Herzog, R. Rajan, A. Sastry: COPS (Common Open Policy Service) Protocol, Internet Draft, Nov. 1999

....an open question whether the same protocol should be used to both (a) coordinate resource control decisions among CH nodes, and (b) con gure the routers and maintain reservation status. An alternative approach is to use a lightweight overlay protocol for (a) and a separate protocol such as COPS [126] to distribute resource control decisions to the a ected routers. COPS is a simple query and response protocol that can be used to exchange policy information between a policy server known as Policy Decision Point (PDP) and its clients or Policy Enforcement Points (PEPs) In our model, the ....

D. Durham, J. Boyle, R. Cohen, S. Herzog, R. Rajan, and A. Sastry, \The COPS (Common Open Policy Service) Protocol," RFC 2748, Internet Engineering Task Force, January 2000.

....buffer management modules that specify the PHB of the router according to the network services offered by each domain. Furthermore, the user may signal her his QoS requirements to the BB of the domain via a mechanism that could be based on the IntServ RSVP model or another mechanism such as COPS [17], CORBA [18] etc. The BB, which is responsible for monitoring and controlling the available bandwidth within the DiffServ domain, DESIGN OF A MULTI LAYER BANDWIDTH BROKER ARCHITECTURE Access Network DiffServ Domain Border Router Access Network DiffServ Domain Border Router Host BB BB Host Edge ....

Boyle, J.; Cohen, R.; Durham, D.; Herzog, S.; Rajan R.; Sastry, A.: The COPS (Common Open Policy Service) Protocol. Internet Draft, IETF, 1999.

....for resource access and usage. This architecture is composed of two main components for policy control: 1) the PEP (Policy Enforcement Point) component running on a network node, and (2) the PDP (Policy Decision Point) which typically resides at a Policy Server. COPS (Common Open Policy Service [1]) is used as the protocol between the PDP and the PEP for exchanging policy information. This work has been partially supported by European Project IRISI Piemonte (InterRegional Information Society Initiative) 2 COPS can be considered as a standard and interoperable mechanism for VPN ....

Boyle J., et al., The COPS (Common Open Policy Service) Protocol, IETF RFC 2748, Proposed Standard, Jan. 2000, at http://www.ietf.org.

....the router and the PM may interact directly. This will for example be necessary to check the correctness of a complex delegate action on the router, or if the PM wants to revoke the access rights of a specific user. For interactions between routers and the PM, a protocol such as COPS [3] could be used. D. Local Delegate Creation In the first part of this section we discussed how an external delegate initiator can create a delegate. We now briefly look at the case where a delegate on the router wants to spawn a child delegate. There are two cases to consider: 1) the child ....

J. Boyle, R. Cohen, D. Durham, S. Herzog, R. Rajan, and A. Sastry. The COPS (Common Open Policy Service) Protocol. IETF Request for Comments 2748, January 2000.

....The aggregated traffic is forwarded and policed within the domain according to the aggregate profiles in place. The definitions of the PHB within a domain define the different services that can be provided by the DiffServ architecture. Policy protocols, such as COPS (Common Open Policy Service) [5], have been suggested to provide dynamic and automatic configuration of various network elements in implementing the PHB. This offers high flexibility for a domain administrator or service provider to define a wide variety of services to meet market needs. This benefit, however, may not be fully ....

J. Boyle, et al. The COPS (Common Open Policy Service) Protocol. IETF Internet draft <draft-ietf-rap-cops-06.txt>, February 1999.

....end to the policy server for the H.323 systems. The policy management concept is still in its infancy, and many of its components are yet to be developed and standardized. The efforts for standardization are being carried out by bodies such as the Desktop Management Task Force (DMTF) and the IETF [2]. 5.5 Security Security in voice communications is gaining more and more interest for both the PSTN and IP Telephony. User terminal authentication as well as communication privacy are the most frequently required security features. A number of devices are commercialized today to secure telephone ....

J. Boyle et al.. Common Open Policy Service Protocol. Internet Draft. August 1998.

....A number of other Internet Drafts have been published defining various directory schemata for IPsec policy. Similar directory based work has also started in the context of the IETF Policy Framework Working Group. It is still too early to determine what the results of that effort will be. COPS [5] defines a simple client server protocol wherein a Policy Enforcement Point (PEP) communicates with a Policy Decision Point (PDP) in order to determine whether a requested action is permissible. COPS is mostly oriented toward admission control for RSVP [6] or similar protocols. It is not clear ....

J. Boyle, R. Cohen, D. Durham, S. Herzog, R. Rajan, and A. Sastry. The COPS (Common Open Policy Service) Protocol. Request for comments (proposed standard), Internet Engineering Task Force, January 2000.

....time, to allow for policies that depend on the time of day, day of the week etc. We did this work on connection admission policies in the summer of 1997 [8] Currently the RSVP Admission Policy group of the IETF is doing similar work on this subject (admission control framework [11] COPS [3] and OOPS [7] 3 Intervening During the Connected Phase As part of our work for SURFnet, we investigated the possibility to abort existing connections. A human network manager might want to abort an unwanted existing connection or reduce the amount of resource allocated for it, to make network ....

....faces this problem. Apparently the IETF has learnt from the problems with managing SVCs, since one of the IETF s working groups has recently started to address policy issues (rapwg) and work is in progress on defining a framework for policy control [11] and policy service protocols (COPS [3] and OOPS [7] Bringing forward standards and implementations for policy management will be a key issue for the success of these new Internet protocols Acknowledgements The research reported on in this paper has been performed for SURFnet bv who also funded it. In particular we would like to ....

J. Boyle, R. Cohen et al., The COPS (Common Open Policy Service) Protocol, IETF Internet-Draft, http://www.ietf.org/html.charters/rap-charter.html

....global consistency between decisions made by the PDP s. The enforcement and execution of policy actions are done by policy enforcement points (PEP) PEP s are typically colocated with packetforward components, such as border routers. PDP s interact with PEP s via Common Open Policy Service (COPS) [5]. PDP s push configuration information down to the PEP s as well as respond to queries from the PEP s. 6.3 Bandwidth Brokers A bandwidth broker (BB) 26, 34] is a logical resource management entity that allocates intra domain resources and arranges inter domain agreements. A bandwidth broker for ....

J. Boyle, R. Cohen, D. Durham, S. Herzog, R. Rajan, and A. Sastry. The COPS (common open policy service) protocol. Request for Comments (Proposed Standard) 2748, Internet Engineering Task Force, January 2000.

....decision points (PDPs) that are responsible for determining which actions are applicable to which packets. PDPs communicate with policy enforcement points (PEPs) contained within network elements that forward packets, such as border routers. The Common Open Policy Service 16 (COPS) protocol [11] is emerging as a viable solution for distributed policy management. It is a client server, query response protocol, similar to SNMP but over a TCP connection. PEPs use COPS to retrieve policy from PDPs and PDPs can asynchronously make decisions and push policy or configuration info to PEPs using ....

J. Boyle, R. Cohen, D. Durham, S. Herzog, R. Rajan, and A. Sastry. The COPS (common open policy service) Protocol. RFC 2748, IETF, January 2000.

....service request can be accommodated and how much network resources must be reserved if it can be accommodated; and 2) bookkeeping phase during which the relevant management information bases will be updated, if the ow is admitted. If the ow is admitted, the BB will also pass (using, e.g. COPS [3]) the QoS reservation information such as hr j ; d j i to the ingress router, so that it can set up a new or re con gure an existing edge conditioner (which is assumed to be co located at the ingress router) for the new ow. As the packets of the ow arrive at the ingress router, the edge ....

J. Boyle, R. Cohen, D. Durham, S. Herzog, R. Rajan, and A. Sastry. The COPS (common open policy service) protocol. RFC 2748, January 2000.

....Services Code Point) field, which is the first six bits of the DS byte in the header of IP packets [28] The definitions of the PHB within a domain define the different services that can be provided by the DiffServ architecture. Policy protocols, such as COPS (Common Open Policy Service) [5], have been suggested to provide dynamic and automatic configuration of various network elements in implementing the PHB. This offers high flexibility for a domain administrator or service provider to define a wide variety of services to meet market needs. This benefit, however, may not be fully ....

J. Boyle, et al. The COPS (Common Open Policy Service) Protocol. IETF Internet draft <draft-ietf-rap-cops-06.txt>, Feb. 1999.

....day of the week etc. At the time this feasibility study was performed, none of the standardisation organisations was addressing these particular policy issues, but fortunately the RSVP Admission Policy group of the IETF has now started work on this subject (admission control framework [11] COPS [3] and OOPS [7] 3 Intervening During the Connected Phase To enable the creation of a high priority connection, a human manager might want to reclaim resources from other existing connections with a lower priority. This can be done by either lowering the resource usage of such connection ....

....faces this problem. Apparently the IETF has learnt from the problems with managing SVCs, since one of the IETF s working groups has recently started to address policy issues (rapwg) and work is in progress on defining a framework for policy control [11] and policy service protocols (COPS [3] and OOPS [7] Bringing forward standards and implementations for policy management will be a key issue for the success of these new Internet protocols Acknowledgements The research reported on in this paper has been performed for SURFnet bv who also funded it. In particular we would like to ....

J. Boyle, R. Cohen et al., The COPS (Common Open Policy Service) Protocol, IETF Internet-Draft, http://www.ietf.org/html.charters/rap-charter.html

....A flow is defined by the 5 tuple consisting of source IP address, destination IP address, transport protocol, source port, and destination port. In this context, there is a need to provide policy control of individual flows, and regulate their ability to reserve network resources. See [1] for a discussion of policy based admission control framework and sample policies) Differentiated services (DiffServ) on the other hand, are aimed at traffic aggregates that may not correspond to fine grained flows. In a differentiated service environment, network devices may take on ....

....models, there is a need for standard protocols to exchange information between the different tiers. A set of standard protocols needs to be used to enhance inter operability of vendor products and to ensure an open solution to the policy problem. For communication between the PEP and PDP, COPS [1] is the standard protocol for exchanging policy information and decisions between the PEP and the PDP. Unlike legacy control protocols such as Command Line Interpreter (CLI) and SNMP, COPS was designed to operate with minimal overhead, reliably and in real time, to provide a dedicated QoS ....

J. Boyle, R. Cohen, D. Durham, S. Herzog, R. Rajan and A. Sastry, The COPS (Common Open Policy Service) Protocol , Internet Draft draft-ietf-rap-cops-05, January 18, 1999.

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Boyle, J.; Cohen, R.; Durham, D.; Herzog, S.; Rajan, R.; Sastry, A. The COPS (Common Open Policy Service) Protocol, RFC2748, Jan. 2000.

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J. Boyle, R. Cohen, D. Durham, S. Herzog, R. Rajan, and A. Sastry. The COPS (common open policy service) protocol. RFC 2748, January 2000.

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J. Boyle, R. Cohen, D. Durham, S. Herzog, R. Rajan, and A. Sastry. The COPS (Common Open Policy Service) Protocol. Internet Draft, November 1999. Work in Progress.

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J. Boyle, R. Cohen, D. Durham, S. Herzog, R. Rajan, and A. Sastry. The COPS (Common Open Policy Service) Protocol. Internet Draft, November 1999. Work in Progress.

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Boyle J., Cohen R., Durham D., Herzog S., Raja R., Sastry A., "The COPS (Common Open Policy Service) Protocol, RFC 2748, January 2000.

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J. Boyle, R. Cohen, D. Durham, S. Herzog, R. Rajan, and A. Sastry. The COPS (Common Open Policy Service) Protocol. Request for comments (proposed standard) , Internet Engineering Task Force, January 2000.

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J. Boyle, R. Cohen, D. Durham, S. Herzog, R. Rajan, and A. Sastry. The COPS (Common Open Policy Service) protocol. IETF RFC 2748, January 2000.

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Boyle J., Cohen R., Durham D., Herzog S., Raja R., Sastry A., "The COPS (Common Open Policy Service) Protocol, RFC 2748, January 2000.

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J. Boyle, R. Cohen, D. Durham, S. Herzog, R. Raja and A. Sastry, The COPS (Common Open Policy Service) Protocol, IETF RFC 2748, Proposed standard (January 2000).

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J. Boyle, R. Cohen, D. Durham, S. Herzog, R. Rajan, and A. Sastry. The COPS (Common Open Policy Service) Protocol. Request for comments (proposed standard), Internet Engineering Task Force, January 2000.

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J. Boyle, R. Cohen, D. Durham, S. Herzog, R. Rajan, A. Sastry, \The COPS (Common Open Policy Service) Protocol," Internet-Draft, Feb. 1999.

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J. Boyle, R. Cohen, D. Durham, S. Herzog, R. Rajan, and A. Sastry. The COPS (common open policy service) protocol. RFC 2748, January 2000.

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Boyle, Jim; Cohen, Ron; Durham, David; Herzog, Shai; Rajan, Raju; Sastry, Arun. The COPS (common open policy service) protocol. Internet draft draft-ietf-rap-cops-00.txt, Jan. 20, 1998.

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