摘要:
An apparatus and method of managing a router table that includes inter-router protocol information indexes the routing table to the inter-router protocol information. Such inter-router protocol information may include data identifying the name of protocol itself, or other related information. To that end, the routing information within the routing table first is indexed based upon the inter-routing protocol information to produce indexed routing information. A given routing information request then may be received. The given request requests both routing information from the routing table, and information relating to a given inter-router protocol. The indexed routing information then is accessed to retrieve the information requested in the request.
摘要:
In a technique for priority forwarding, an upper layer protocol that requires priority forwarding includes a priority function that is invoked by a lower layer protocol in order to obtain the priority for a message. The upper layer protocol provides the priority function to the lower layer protocol when the upper layer protocol is installed in the protocol stack. The lower layer protocol invokes the priority function before passing a message to the upper layer protocol in order to determine a priority for the message. The lower layer protocol places the message in the appropriate queue based upon the priority indicator obtained from the upper layer protocol's priority function.
摘要:
An apparatus and method of communicating messages between a first application and a second application establishes a path between the first application and the second application. At least one channel is defined within the path, where each of the at least one channels is designated as forwarding a single type of message between the first application and the second application. A handler is assigned to each channel. In preferred embodiments, the handler processes messages in its assigned channel in a uniform manner.
摘要:
An apparatus and method of establishing communication between a first application added to a platform, and a second application executing on the platform, controls the first and second applications to establish a path for interapplication communication. To that end, a notify message is forwarded to the second application when the first application is added to the system. Receipt of the notify message by the second application causes the second application to ascertain path data for establishing a path between the two applications. The first application also ascertains path data for establishing a path between the applications. The first and second applications then are controlled to establish a single path between the first application and the second application after the path data is ascertained.
摘要:
An apparatus and method of managing communication between a first application that has failed and an executing second application permits the first application to establish a path to the second application. To that end, a fail message (notifying the second application that the first application has failed) is forwarded toward the second application, and the first application is restarted. As noted above, the first application establishes a path to the second application after it is restarted. Once the path is established, the second application is notified that the first application is ready to communicate via the path.
摘要:
A routing device includes a routing application program interface that routing programs utilize to route data packets to other devices in a network. To that end, the routing device includes a processor for executing a routing program, a plurality of functional modules that control the operation of the routing device and forward data packets to the other network devices as specified by the routing program, and the routing application program interface operatively coupled with the processor. The routing program utilizes a set of specified commands associated with the routing application program interface for interacting with the plurality of functional modules through the routing application program interface. The routing program specifies a data packet routing protocol, while the functional modules comprise at least one of hardware and software.
摘要:
A system, device, and method for distributing access control information in a communication system uses a reliable multicast mechanism for distributing access control information by a main server to multiple access control devices. A dedicated multicast group is established for distributing the access control information, and each access control device joins the dedicated multicast group. A reliable multicast mechanism is used to distribute the access control information to the multicast group members. Each access la control device obtains the access control information using the reliable multicast mechanism, and stores the access control information in a database for later use in making receiver access control decisions.
摘要:
A system, device, and method for distributing link state information in a communication network combines a link state routing protocol with a sliding window mechanism in order to efficiently distribute link state information. The sliding window mechanism permits a predetermined number of unacknowledged link state advertisement protocol messages to be outstanding at any given time. Unacknowledged link state advertisement protocol messages are retransmitted after a predetermined timeout period.
摘要:
A system, device, and method for receiver access control in a multicast communication network uses a policy service to determine whether a subscriber device can be admitted to a multicast group. The subscriber device accesses the multicast communication network via an access device. The access device uses a policy service to obtain a policy decision from a policy server, where the policy decision indicates whether or not the subscriber device can be admitted to the multicast group. The access device enforces the policy decision by admitting the subscriber device to the multicast group if and only if the policy decision indicates that the subscriber device can be admitted to the multicast group.
摘要:
An application programming interface for use in a network device includes at least one control module that is capable of controlling a forwarding plane of the network device. In particular, the network device forwards packets across a network, and includes the forward plane for processing data packets. The application programming interface includes an input module that receives function calls, at least one control module (mentioned above) that receives input control data via the function calls, and an output module that forwards output control data from the control module. The control module produces the output control data based upon the input control data. The output control data is capable of controlling execution of the forwarding plane.