34 results about "Provider Backbone Bridge Traffic Engineering" patented technology

A Layer 2 Virtual Private Network (L2VPN) system is provided. A Provider Backbone Bridge (PBB) network is provided which comprises a plurality of sites to be connected via a L2VPN. The plurality of sites in the PBB network is connected using a plurality of provider backbone trunks that includes a Provider Backbone Transport (PBT) trunk or a Provider Backbone Bridge Traffic Engineering (PBB-TE) trunk, such that the L2VPN includes the plurality of sites.

Methods and apparatuses are disclosed for interworking a first protocol, e.g., Provider Backbone Bridge Traffic Engineering (PBB-TE), that provides Ethernet carrier-class traffic engineering, with a second protocol, e.g., Virtual Private LAN Service, that emulates local area network (LAN) service. Unicast, multicast, and broadcast transmissions are enabled across an Ethernet aggregation network and an MPLS core network. Dual homing protection and end-to-end traffic engineering with adjustable granularity are also provided. These capabilities are not available with traditional PBB-TE networks or with an interworking between PBB and VPLS that has been previously proposed. Embodiments of the invention terminate a PBB-TE tunnel at a user-facing provider edge (UPE) node and attach instance service identifiers (ISIDs) to different virtual switching instances (VSI)s. As a result, inexpensive Ethernet-only aggregation networks can be designed to interoperate with VPLS with increased reliability and control, benefiting service providers and end users.

A Layer 2 Virtual Private Network (L2VPN) system is provided. A Provider Backbone Bridge (PBB) network is provided which comprises a plurality of sites to be connected via a L2VPN. The plurality of sites in the PBB network is connected using a plurality of provider backbone trunks that includes a Provider Backbone Transport (PBT) trunk or a Provider Backbone Bridge Traffic Engineering (PBB-TE) trunk, such that the L2VPN includes the plurality of sites.

The invention discloses a method for protecting an Ethernet tunnel. More than one protective entity is provided for a working entity in an Ethernet protective domain, and the working entity and the protective entity have the same two endpoint bridges. The method comprises the following steps of: when one endpoint bridge detects the fault of the working entity, switching the protected tunnel on the working entity to the protective entity, namely modifying the output port of a forwarding item of the protected tunnel associated with the port of the working entity into the port of the selected protective entity, and informing the other endpoint bridge of port switching. The invention discloses a device for protecting the Ethernet tunnel at the same time. The method and the device can well realize quick protection of transfer of electrostatic images (TESI), enhance the robustness of a provider backbone bridge-traffic engineering (PBB-TE) network, and improve the performance of the network.

The invention discloses a method for automatic topology discovery and resource information management in a Provider Backbone Bridging Traffic Engineering (PBB TE) network, which comprises the following steps: constructing an Open Shortest Path First (OSPF) Hello message containing network topology information or an OSPF protocol Link State Affirm (LSA) message containing resource information, and transmitting the message to other nodes in the network by a first network node; and receiving the message and recording the network topology information or the resource information in the message into a local network topology information database or a resource information database by a second network node. The invention also discloses a PBB TE network node device. The proposal of the method can achieve the automatic topology discovery and the resource information management in the PBB TE network.

Systems and methods for self-healing Ethernet topologies which are compatible with PBT, which use standards-based protocols, which do not self-configure, and which use Ethernet OAM are provided. Interconnected nodes are configured with a primary and secondary path which is determined by VLANs, MPLS label, Provider Backbone Bridge Traffic Engineering (PBB-TE) VLAN ID (VID), Frame Relay (FR), Asynchronous Transfer Mode (ATM) Virtual Circuits (VCs), and the like. One or more head-end nodes are designated for terminating each path and for performing cross-connects between the primary and secondary paths. IEEE 802.1ag Continuity Check Messages (CCM) are transmitted by all nodes on both the primary and secondary routes. Responsive to a loss of a predetermined number of CCM messages, traffic is switched to the secondary route. In non-fault conditions, both the paths for the primary and secondary routes can carry traffic.

The invention provides a network protection method and a network protection framework. Through a double-node protection mould of the invention, a part of networks needing to be protected on a provider backbone bridge traffic engineering (PBB-TE) tunnel which supports traffic engineering are provided with a protection domain consisting of a primary section and a standby section, so that a certain section and an end point bridge of a part of the PBB-TE tunnel are protected to the maximum extent. The PBB-TE segmented protection network framework provided by the invention realizes the partial segmented protection of the PBB-TE tunnel, protects a partial section needing to be protected and solves the problem that the entire Ethernet tunnel needs to be switched when a part fails. The method and the framework have the advantages of enhancing the utilization ratio and reliability of the network, achieving high flexibility on the protection of networking implementation and meeting common requirements during practical networking.

A method for transmitting a Connectivity Fault Management (CFM) message of Ethernet includes: receiving a CFM message transmitted from a source node, the CFM message including identifier of a path and a connection maintenance target address; determining whether the connection maintenance target address matches address of a receiving node, and if yes, terminating the CFM message; otherwise forwarding the CFM message to a next hop based upon the path identifier of the path. Another method and a system for transmitting a CFM message of Ethernet, a node for transmitting a CFM message of Ethernet, and a node for receiving a CFM message of Ethernet are also disclosed. With the invention, a CFM message may be forwarded according to information of a Medium Access Control (MAC) address and a Virtual Local Area Network Identifier (VLAN ID) of a path identifier where a monitored service is located, and thus may be forwarded correctly in a Provider Backbone Bridge Traffic Engineering (PBB-TE) network.

Systems and methods for sinking port mirrored from one or more identified flows of data to any node in a network are provided. Moreover, the network is configured to convey the mirrored data to the sink, without the need for any facilities expressly dedicated for this purpose. The present invention removes the requirement to co-locate the sink port within the same logical node. The present invention uses a mirrored flow configured as a provisioned layer two point-to-point connection, such as a Switched Permanent Virtual Circuit (SPVC), Pseudo-Wire (PWE3), a Virtual Local Area Network (VLAN) cross-connect, Provider Backbone Bridging-Traffic Engineering (PBB-TE), and the like. The node with the mirrored port is configured to create copies of the appropriate set of packets (i.e., ingress, egress packets, or both based on provisioning and based on the identified flow), and to forward the packets to the sink port through the provisioned point-to-point connection.

Methods and apparatuses for allocating backbone virtual local area network identifiers (BVIDs) to connection requests in a provider backbone bridging-traffic engineering (PBB-TE) network are described. During operation, a system (e.g., a network management system) can receive a set of connection requests for a set of connections that are desired to be set up in the PBB-TE network. Next, the system can allocate a BVID to each connection request in the set of connection requests so that, once the set of connection requests are set up in the PBB-TE network, conflicting connections in the PBB-TE network have different BVIDs.

The invention discloses a segment protection method for an Ethernet tunnel, there are two segment protection domains with a shared link in a Provider Backbone Bridge-Traffic Engineering (PBB-TE) network, and at least one of the two segment protection domains works in a non-revertive mode, and when a simultaneous failures of working segments of two segment protection domains recover or a failure of the shared node of the working segments recovers, the shared node of the working segments switches all the FDB entries of bidirectional ESPs of all the TESIs protected by the protection domains to standby entries, and after switching, out ports of the FDB entries of the ESPs are the ports connecting the shared segment. The invention also discloses a shared node of working segments of protection domains correspondingly. The invention is able to ensure that the bidirectional ESPs are co-routed after the failure recovering.

A method of providing protection switching on a backbone network includes configuring a service instance table for a first port of a first bridge. The service instance table includes a Virtual Local Access Network (VLAN) identifier entry for one or more service instances. The method also includes mapping data traffic received at the first bridge onto a first trunk by setting a VLAN identifier entry for a first service instance and transmitting data traffic to a second bridge on the first trunk in accordance with the mapping and monitoring the first trunk for faults by exchanging continuity check messages with the second bridge over the first trunk. The method additionally includes, upon detecting a fault, remapping data traffic for the first service instance by changing the VLAN identifier entry for the first service instance and transmitting data traffic to the second bridge in accordance with the remapping.

The invention discloses a method for automatic topology discovery and resource information management in a Provider Backbone Bridging Traffic Engineering (PBB TE) network, which comprises the following steps: constructing an Open Shortest Path First (OSPF) Hello message containing network topology information or an OSPF protocol Link State Affirm (LSA) message containing resource information, andtransmitting the message to other nodes in the network by a first network node; and receiving the message and recording the network topology information or the resource information in the message into a local network topology information database or a resource information database by a second network node. The invention also discloses a PBB TE network node device. The proposal of the method can achieve the automatic topology discovery and the resource information management in the PBB TE network.

The invention provides a data stream transmission method based on a provider backbone bridge traffic engineering (PBB-TE) sectional tunnel, and a node. The method comprises the following steps of: configuring a PBB-TE which supports traffic engineering and a PBB-TE tunnel which supports the traffic engineering according to the difference between a node type and a link type; and transmitting a received message according to the configured PBB-TE tunnel. By the tunnel configuration method and the message transmission method, the system can conveniently maintain the tunnel maintenance, so the fault coupling among different rings is reduced, and the property of the Etheric multi-ring network is enhanced greatly.

The invention discloses a segment protection method for an Ethernet tunnel, there are two segment protection domains with a shared link in a Provider Backbone Bridge-Traffic Engineering (PBB-TE) network, and at least one of the two segment protection domains works in a non-revertive mode, and when a simultaneous failures of working segments of two segment protection domains recover or a failure of the shared node of the working segments recovers, the shared node of the working segments switches all the FDB entries of bidirectional ESPs of all the TESIs protected by the protection domains to standby entries, and after switching, out ports of the FDB entries of the ESPs are the ports connecting the shared segment. The invention also discloses a shared node of working segments of protection domains correspondingly. The invention is able to ensure that the bidirectional ESPs are co-routed after the failure recovering.

Systems and methods for sinking port mirrored data to any node in a network are provided. Moreover, the network is configured to convey the mirrored data to the sink, without the need for any facilities expressly dedicated for this purpose. The present invention removes the requirement to collocate the sink port within the same logical node. The present invention uses a mirrored flow configured as a provisioned layer two point-to-point connection, such as a Switched Permanent Virtual Circuit (SPVC), Pseudo-Wire (PWE3), a Virtual Local Area Network (VLAN) cross-connect, Provider Backbone Bridging-Traffic Engineering (PBB-TE), or the like. The provisioned point-to-point connection is configured between the mirrored port to a sink port. The node with the mirrored port is configured to create copies of the appropriate set of packets (i.e. ingress or egress packets or both based on provisioning), and to forward the packets to the sink port.

A network protection method and a network protection framework are provided by this invention. In the network based on the Provider Backbone Bridge Traffic Engineering (PBB-TE), a local network is determined, and a work segment and a protect segment are set in the determined local network. When the work segment path fails, the traffic on this work segment path is switched to its protect segment path, rather than the switching of the whole path. Therefore, the speed of the failure recovery is improved, and the nodes concerned with the protection switching are reduced.

The disclosure provides a method for detecting a mismatch fault and a Maintenance Endpoint (MEP). The method includes: determining whether there is a Traffic Engineering Service Instance (TESI) configured in a segment, setting a Present Traffic in Segment (PTS) variable, and setting a value of a PTS field included in a Connectivity Check Message (CCM) sent from a Maintenance Endpoint (MEP); receiving the CCM by the MEP, when the value of the PTS field included in the CCM does not coincide with that of the PTS variable, setting, by the MEP, a first mismatch fault indication variable mmCCMreceived to be set; when the first mismatch fault indication variable mmCCMreceived remains set after a first preset time period expires, detecting that a mismatch fault occurs. The method finds timely the mismatch problem occurred in the segment protection of Provider Backbone Bridging-Traffic Engineering (PBB-TE), thereby preventing data loss and service interruption caused by the occurrence of mismatch.

The invention discloses a method, a system and device for signaling control. The method comprises the steps that: a destination MAC address of a local backbone network and VLAN ID of the backbone network are configured and added into a local topology table; the destination MAC address of the local backbone network and the VLAN ID of the backbone network are transmitted to an adjacent device by a multiprotocol border gateway protocol (MP-BGP) and the destination MAC address of the local backbone network and the VLAN ID of the backbone network sent by the adjacent device by the MP-BGP are received and stored in the local topology table; a provider backbone bridge-traffic engineering (PBB-TE) tunnel is established according to information in the local topology table. In the embodiment of theinvention, the PBB-TE tunnel is dynamically established according to the information carried by the MP-BGP and a new tunnel can be automatically generated in a convergent manner when a link circuit fails; when network topologies change, for example, new nodes are added, nodes relevant to the new nodes can automatically update without need of manual configuration.