摘要:
Supporting communication sessions at a mobile node includes determining at a mobile node an address for one or more interior network elements of a network system. A interior network element is distinct from an edge network element of the network system, and is operable to establish a communication session. An address for an interior network element is inserted into packets. The packets are sent from the mobile node to the interior network element to communicate directly with the interior network element. The communication session is established using the interior network element.
摘要:
Techniques are provided for controlling a flow of packets in a data communications device. A first technique involves transferring packets of a particular packet flow based on an initial policy scheme, and planning a scheme change to change the initial policy scheme to a new policy scheme based on conditions within the data communications device existing while transferring the packets of the particular flow based on the initial policy scheme. The first technique further involves providing a change signal to the source of a particular packet flow (e.g., a sending host). The change signal indicates that the data communications device has planned the scheme change. Additionally, the first technique involves processing the scheme change based on either a reply signal from the source or an absence of a reply signal from the source.Another technique involves outputting packets of a particular packet flow to a data communications device that transfers the packets of the particular packet flow based on an initial policy scheme. Additionally, the technique involves receiving, in response to the outputted packets of the particular packet flow, a change signal from the data communications device. The change signal indicates that the data communications device has planned a scheme change to change the initial policy scheme to a new policy scheme. Furthermore, the technique involves providing, to the data communications device, a reply signal that provides direction for processing the scheme change.
摘要:
The realtime event classification technique is described for a data communications network, which enables the categorization of data frames based upon selection significant bit segments in the serial bit stream. A base Event Driven Interface and an extension Event Driven Interface are both coupled to the data communications network, to identify patterns in the serial bit stream. The base Event Driven Interface identifies patterns which correspond to events which are to be counted. The extension Event Driven Interface identifies patterns of bits which are selection significant for the types of categories which are desired to be monitored. A plurality of event vector counters have event inputs coupled to the base Event Driven Interface and have a selection input coupled to the extension Event Driven Interface. A selection signal output from the extension Event Driven Interface enables one of the plurality of the event vector counters to receive the event signals from the base Event Driven Interface. In this manner, a variety of monitoring and analysis operations can be performed on the data communications network.
摘要:
A dynamic realtime, inband routing mechanism is disclosed for a data communications network, which provides an Event Driven Interface to perform realtime, inband directed routing for load distribution and load balancing of data frames over one of a plurality of destination paths. The Event Driven Interface is programmed with control vectors to identify load balancing and load distribution bit patterns in the data frames on the data communications network. Enabling signals produced by the Event Driven Interface are applied to the control input of a multiplexer whose data input is connected to the data communications network. The multiplexer will steer the data frames from the data communications network to one of a plurality of output alternative routing paths, in response to the enabling signals it receives from the Event Driven Interface.
摘要:
An Event Driven Interface (EDI) is disclosed for use as a subsystem of a monitoring and control system for a data communications network. The network communicates a serial stream of binary bits having a characteristic pattern. The system includes a control vector generator for generating a control vector C(i) which describes the characteristic pattern and an event vector analyzer for analyzing an event vector E(i) which represents a plurality of occurrences of the pattern on the network.
摘要:
A network system for authorizing an endpoint node for a communication service includes an operator network and an organization network. The operator network operates to perform a device authorization operation to authorize the endpoint node for a communication session. The organization network operates to facilitate a service authorization operation to authorize the endpoint node for the communication service of the communication session.
摘要:
A method for distributing information in a network environment is provided that includes receiving one or more packets from a communication flow and recognizing a universal generic identification (UGI) associated with the communication flow. The UGI corresponds to an end user that is associated with the communication flow. The UGI is operable to enable a service for the end user in a first network and a second network, the first and second networks being different, whereby either the first network or the second network operates as a home network for the end user.
摘要:
The invention provides a system including methods and apparatus that adjust usage of one or more resources of a data communications channel. The system can negotiate a current resource setting for usage of the resource of the communications channel and can perform communications on the communications channel using the resource. The resource can be, for example, a bandwidth setting of the communications channel. Periodically, the system can renegotiate a new value for the current resource setting upon detecting a negotiation event during performance of communications on the communications channel using the resource. One such negotiation event is an indication that an accrued usage cost of the resource of the communications channel substantially equals or exceeds a cost to renegotiate the current resource setting. Another negotiation event indicates that an actual resource setting of the communications channel substantially equals or exceeds the current resource setting for the communications channel. Another negotiation event indicates that a data communications device using the bandwidth setting of the communications channel has requested to negotiate a new value for the current resource setting of the communications channel.
摘要:
A server installation, which includes multiple servers, services a client request using a filter index that is different than a destination address associated with the client request. This enables clients to generate client requests for a server installation in a conventional manner without regard to whether a server installation is formed by one server or multiple servers. Accordingly, when a server installation is scaled by increasing the number of servers for redundancy, load distribution or capacity reasons, reconfiguration of the clients utilizing the servers is unnecessary. In one arrangement, the data resides in a data structure having (i) a device identifier that uniquely identifies the server host among multiple server hosts, and (ii) a filter index which is different than the device identifier.
摘要:
The invention is directed to techniques for transferring data using a device driver that is arranged to prevent improper operation of a non-primary routine (e.g., an administrative operation) from causing improper operation of a primary routine (e.g., a data transfer operation). Accordingly, the primary routine can continue to operate properly after a failure of the non-primary routine. In one arrangement, a data communications device transfers data. The data communications device includes a port that couples to a network, and a processor coupled to the port. The data communications device further includes memory, coupled to the processor, that stores a device driver. The device driver has a first set of instructions that directs the processor to perform a data transfer routine that moves data between memory and the port, and a second set of instructions that directs the processor to perform an administrative routine. The second set of instructions is arranged to prevent improper operation of the administrative routine from causing improper operation of the data transfer routine. In particular, execution and communication mechanisms enable the primary and administrative routines to operate in such a fault-tolerant manner.