85 results about "Ingress router" patented technology

In an MPLS network, multicast, broadcast and address learning belonging to the layer 2 functions are realized. An ingress router comprises a frame receiving unit, a determining unit, a first frame transmitting unit, a physical address table for multicast, a label switching unit, a tunnel label table, a VCID giving unit, a L2 header creating unit and a second frame transmitting unit. The load on the network is suppressed, the band is efficiently used, and wasteful frame duplication and frame forwarding between edge routers are avoided.

A method and system for automatically interconnecting IPv4 networks across an IPv6 network are disclosed. The method includes receiving an IPv4 packet at an ingress router in the IPv6 network and finding the longest match IPv4 routing entry for IPv4 addresses in the received packet to identify an egress router in the IPv6 network. The IPv4 packet is encapsulated to create an IPv6 packet, wherein destination and source addresses of the encapsulated packet identify a subnet router anycast corresponding to the ingress router and the egress router in the IPv6 network. The encapsulated packet is forwarded to the egress router.

Disclosed is a content based router, system and method of operation. Upon receipt of a data packet at in ingress router, the ingress router matches the content of the data packet against stored user subscriptions. In one embodiment, the content is described using XML data and the user subscriptions are defined by XML queries. The router assigns a routing label to the data packet based on the matching, and transmits the data packet to a second network router. Intermediate routers along the packets path then use the assigned label in combination with stored routing tables in order to determine next hop routing. Upon receipt at an egress router, the content of the message is matched against user subscriptions for those users serviced by the egress router, and the egress router provides the data packet to those end users whose subscriptions match the content. The assigned routing labels may define routing paths or routing trees.

A method and system for forwarding data units in a communications system, that comprises: ingress routers (901) capable of forwarding data units and containing a Forwarding Equivalence Class table (911) that contains mapping information, intermediate routers (905, 907, 909) capable of forwarding data units, egress routers (903) capable of forwarding data and containing a Forwarding Equivalence Class table (919) that contains mapping information. The method comprising the steps of: assigning a first label on data unit and a second label on data unit based on mapping information, sending data unit in to egress router via one or more intermediate router (905, 907, 909), receiving (903) data unit, identifying data unit based on mapping information on Forwarding Equivalence Class table (919) and based on second label. The method further comprises the steps of: creating a Forwarding Equivalence Class for radio access network specific data units; and storing information about Forwarding Equivalence Class in Forwarding Equivalence class table (FEC).

Embodiments of the invention provide a cross-data-center virtual machine migration method, a service control gateway and a cross-data-center virtual machine migration. The migration method comprises: a target service control gateway of a target data center receives virtual machine migration information sent by a source service control gateway of a source data center; the target service control gateway configures a response strategy, an internal data channel between an ingress router of the target data center and a target switch, and an external data channel between the target data center and a user on the target switch; the target service control gateway sends configuration success information to the source service control gateway; and the target service control gateway installs an virtual machine to be migrated on the target server and provides service for the user. According to the embodiments of the invention, the strategy of the target switch can be automatically installed, the external data channel from the user to the target data center can be automatically installed, and the internal data channel between the ingress router of the target data center and the target switch can be automatically installed, thereby achieving the automatic virtual machine migration across data centers.

A method for optimizing the use of network resources for the transmission of data signals, such as voice frames, between network units over an IP-packet supporting network. The data frames are obtained using codecs, which may have a different mouth-to-ear transmission delay, from data samples, e.g. voice samples, that are formatted and to which a data frame header is added. The method includes attributing codec categories to each of the data or voice frames according to the codecs by means of which the data samples are generated, each codec category corresponding to a different mouth-to-ear delay budget range for the data frames; sorting the data frames according to their codec categories; generating multiplexed cells from data frames of a same codec category, each multiplexed cell being obtained by multiplex aggregation of a predetermined number of voice samples; and transporting the multiplexed cells from an ingress router to an egress router in the IP-network.

In method of providing assured message delivery across a distributed message delivery system with low delivery latency and network traffic, a set of destinations is first identified for a set of destinations for a message received at an ingress router to the network. The received message is stored in persistent storage along with meta-data about each destination for the message before the message is routed to each identified destination. The message is only removed from persistent storage when an acknowledgement has been received from each destination indicating that the message has been successfully received.

The invention provides a message sending method and apparatus and a message cross-domain forwarding network architecture. The message sending method comprises steps: a bit indexed explicit replication-rendezvous point (BIER-RP) device of a first domain announces an address of a cross-domain multicast group to a controller; and after a bit-index forwarding ingress router (BFIR) of the first domainreceives a multicast data message requesting to be transmitted across a domain to a second domain, the BFIR transmits the multicast data message to a bit-index forwarding egress router (BFER) of the first domain, and the BFER forwards the multicast data message to the second domain. The technical problem that many network resources need to be occupied when the multicast data message is transmittedin a related technology can be solved.

A system and method for transmitting data from a first site to a second site over a shared Multi-Protocol Label Switched (MPLS) network comprising a plurality of routers, including an ingress router in communication with the first site and an egress router in communication with the second site, includes configuring a plurality of label switching paths between the ingress router and the egress router over a plurality of label switching devices. The method further includes performing a first lookup on one of at least one virtual routing and forwarding (VRF) table stored in the ingress router, whereby the first lookup identifies one routing table from a plurality of routing tables stored in the ingress router, each routing table being associated with one of the plurality of label switched paths, and performing a second lookup on the one routing table, wherein the routing table defines the associated label switched path between the ingress router and the egress router for a virtual private network (VPN) between the first site and the second site.

A packet protection method allowing rapid restoration in case of fault occurrence without undesired reduction in efficiency on the use of network bandwidth is disclosed. In a packet protection network having a working route and a reserved route set therein, when a failure occurs, a router on the working route sends an incoming packet to be protected back to the ingress router. The ingress router forwards the packet to be protected to the reserved route so that the packet to be protected travels through the reserved route around the failure.

A system and method collects information for VPN traffic from non edge routers that are coupled to edge routers and identifies the path the traffic took and the customer corresponding to the VPN. The system and method also identifies the ingress router coupled to the non edge router from which the traffic was collected. The system and method may assign identifiers to route targets.

The invention discloses a shortest path tree and spanning tree combined routing method and belongs to the technical field of network topology. The method is characterized in that on the basis of a standard link state routing protocol, a dormant state is added to each link which is connected with a router node in a network, a shared spanning tree is selected on a given network topology, links on the spanning tree are in a working state all the time so as to guarantee network connectivity, other links which are not on the spanning tree enter into dormant states if no flow passes, each router stores a shortest path routing list of the whole network path and a routing list of a corresponding spanning tree, as for a data packet, an ingress router determines that the data packet uses a path therein according to current link loads, a label identification is added, and a non ingress router selects a corresponding routing list according to a label to perform forwarding.

A system and method for receiving, from one or more ingress routers, a first set of records including data corresponding to network traffic, receiving, from one or more egress routers, a second set of records including data corresponding to network traffic and creating a multicast traffic matrix using at least a portion of the data included in the first and second sets of records.

A method of managing resources in a switched network including the steps of assigning a respective willingness to pay WtP value to each of a plurality of network users, assigning respective set point values for a network performance parameter for each of a plurality of routers in the network, assigning a respective initial price value to each router which is associated with the network performance parameter at the router, and operating a first control loop which is operable to receive respective measures of the actual network performance at each of the routers, calculate for each router, a plurality of difference values which are the respective differences between the actual performance and the set point for each router, adjust the price value for each router by a factor based on the respective difference value, generate a flow price value for each user by summing the price values for each of the routers in the path of the respective user's desired data flow through the network, allocate a resource share value for each user which represents the value of the respective VtP value divided by the respective flow price value, and cause the ingress router for each user to restrict flow into the network ingress from each user in accordance with each user's allocated resource share value, whereby the actual network performance at each router is made to converge to the set point value for the respective router by automatic admission control adjustment at the network ingress routers.

Techniques are described for detecting failure or degradation of a service enabling technology function independent from an operational state of a service node hosting the service enabling technology function. For example, a service node may provide one or more service enabling technology functions, and service engineered paths may be traffic-engineered through a network to service node network devices that host a service enabling technology function. A monitor component at the service layer of the service node can detect failure or degradation of one or more service enabling technology functions provided by the service node. The monitor component reports detection of failure or degradation to a fault detection network protocol in a forwarding plane of the service node. The fault detection network protocol communicates with an ingress router of a service engineered path to trigger fast reroute by the ingress of traffic flows to bypass the affected service enabling technology function.

The invention relates to label switched path reporting. Techniques are described for reporting, by non-ingress routers for traffic engineering label switched paths (TE LSPs) and to a path computation element, actual paths taken by the TE LSPs through the network. A first network device: receives, from a second network device, an LSP path signaling message that includes a route object having a first indication of at least a sub-path of a path for TE LSP through a network, wherein the first network device is not an ingress label edge router for the TE LSP; generates, in response to the LSP path signaling message and based at least in part on the route object, an LSP path report message that includes a second indication of the at least the sub-path of the path for the TE LSP; and sends, to a path computation element, the LSP path report message to notify the PCE.

Disclosed are methods and apparatus for providing load information for one or more data streams within a network having a plurality of ingress routers, a plurality of core routers, and a plurality of egress routers is disclosed. a plurality of packets are received into a selected ingress router. Each packet belongs to one of several service classes, and the packets are being transmitted to a particular destination. A load value is metered for each service class and the particular destination of at least one of the packets. One or more tickets are periodically transmitted to the destination to indicate the load value for each of the one or more service classes. This load information is then utilized to dynamically allocate load for each service class at the destination.

The invention discloses an intelligent routing selection method based on flow analysis and node trust degree, which belongs to the technical field of networks and is suitable for the situation that a plurality of routings exist between an inlet router node and a target node and each routing only passes one intermediate node. The method comprises the steps of: implementing differentiation service among different businesses through business identification and marking, and then selecting a link with smaller load and higher trust degree through link flow prediction and the trust degree of an evaluation node. The method guarantees the safety at the same time of realizing load balance, thereby realizing the real-time, intelligent and dynamic routing.

The invention discloses a method, device and system for realizing flow forwarding, belonging to the routing field. The method comprises the following steps of identifying whether flow forwarding needs to be carried out on an IPv6 message or not; setting an identifier about whether the flow forwarding is carried out or not in a Flow Label in an IPv6 message packet header according to an identification result; and transmitting an IPv6 message so that the IPv6 message is forwarded by a router receiving the IPv6 message according to the identifier about whether the flow forwarding is carried out or not. The device comprises a receiving and forwarding module or comprises an identifying, setting and transmitting module. The system comprises an edge ingress router and also comprises an immediate node router or/and an edge egress router. According to the invention, whether the flow forwarding is carried out or not is definitely indicated through the identifier about whether the flow forwarding is carried out in the Flow Label or not; and a follow-up router transmits the information without identifying the flow and without a signaling so that route resources are saved, router burden is reduced and the efficiency of the router is improved.