113 results about "MPLS-TP" patented technology

A method for resource optimized network virtualization overlay transport in a virtualized data center environment includes an optimized virtualized transport mechanism based on MPLS-TP tunneling technology. The transport mechanism may include a usage monitoring and resource usage advertisement mechanism based on IGP-TE protocol extension. Also, the transport mechanism may include a path computation engine (PCE) based optimal path computation for a virtualized transport tunnel used to carry VM-to-VM traffic across the virtualized data center. Additionally, the transport mechanism may include a SDN controller for provisioning and control of virtualized machines and a virtualized transport system.

A transport system comprises a transport apparatus, which is used to construct a transport network using MPLS-TP; and a control apparatus for establishing a path in the transport network. The transport apparatus is coupled to a transfer apparatus, which is used to construct a transfer network using a network protocol different from an MPLS-TP protocol and uses the network protocol to establish a path in the transfer network in an autonomous distributed manner. The control apparatus and the transfer apparatus use the network protocol of the transfer network to transmit/receive, via the transport apparatus, control messages for controlling the transfer network. The transport apparatus avoids notifying the transfer apparatus of the fact that the control apparatus is not in a normal state, in a case where the path established in the transport network is determined as the normal state, even the control apparatus is determined as the abnormal state.

Systems and methods with dynamic Connectivity Fault Management (CFM) and Continuity Check Messages (CCMs) that enable dynamic configurations to avoid limitations associated with static reconfigurations. Variously, a network, a method, and a network element are configured to implement a dynamic CFM method for dynamic notifications and actions taken based thereon between Maintenance End Points (MEPs). The systems and methods may also include a CCM attribute adjustment method between two MEPs, a CCM suspension and/or resumption method between two MEPs, and a MEP auto-discovery and leaving method. Advantageously, the systems and methods may be utilized in a variety of contexts including controlled maintenance, in-service software upgrades, network congestion, discovery of new remote MEPs, and the like to enable dynamic configurations between MEPs. The systems and methods may also apply to Carrier Ethernet, Multiprotocol Label Switching-Transport Profile (MPLS-TP), and the like.

The invention discloses a service transport method for distinguishing the priority in an MPLS-TP over OTN multi-layer network and a device thereof. The method comprises the following steps that an OTN edge node MPLS-TP service entry receives MPLS-TP data; the service data distinguishes service types via frame header double-label information to divide different services into sending queues with different priority; appropriate bandwidth source is distributed to be sent out according to the bandwidth resource of a node optical link after the service is packaged into a unified OTM frame structure; and service is correspondingly processed at the receiving end and is reduced into corresponding service to be processed by an MPLS-TP label and sent out from the service interface, and finally the MPLS-TP service transport based on the priority is completed. The invention effectively ensures the service priority based on the service transport method and the system for distinguishing the priority in the MPLS-TP over OTN multi-layer network, and increases the resource utilization rate of OTN node lines.

The invention is an OAM component communication mechanism based on MPLS-TP signing label, which is applied to OAM communication of MEP and MIP in the point to point common-route bidirectional path OAM function of the MPLS-TP network. the OAM function of MPLS-TP network need one OAM communication mechanism of MEP and MIP under non-IP environment, the original outdated method based on TTL is immature and only can implement the function of MEP to transmit OAM package to a designated MIP, has no concrete regulations that how to perform the MIP marking and how to reply after the MIP receives the OAM package. Based on the original communication mechanism, the invention introduces the mode of MPLS-TP signing label to implement the MIP marking function in the OAM function on the common route bidirectional LSP or PW path under the MPLS-TP network of the non- IP environment, and the reply function after the MIP receives the information, thereby satisfying the design requirement of the MPLS-TP.

The invention discloses a ring protection switching method adopting a multi-protocol label switching transport profile (MPLS TP) and a node. The method comprises the following steps of: deploying a totally-enclosed protection LSP (Label Switching Path) on an MPLS TP ring, wherein the LSP is shared by all working LSPs and is in a direction opposite to all working LSPs, and different merging labels are distributed for every working LSP; when a first node receives a user message from a node outside the ring or the working LSPs under the condition that the first node and a second node on the ring are not communicated with an adjacent node, the first node on the protection LSP is a downstream node of the adjacent node and the second node is an upstream node of the adjacent node, pressing the merging label into the message or switching a working label on the message into the merging label and adding a protection label on the message; and when the message reaches the second node from the protection LSP and the protection label of the message is popped from the second node, switching the merging label of the message into the working label. Under the condition that only one protection LSP is used, the protection switching complexity is lowered.

An apparatus and method for processing a packet in a multi-protocol label switching-transport profile (MPLS-TP) network are provided. In the method of processing a packet, a packet transport layer (PTL) index and a layer stack (LS) or multiple label pop (MPOP) loopback header are used, and it is possible to remove a size limitation on lookup results of a lookup table when multiple labels are stacked, and solve the problem of having to extract all labels as label keys regardless of label operations upon an incoming label map (ILM) table lookup.

The invention discloses a system and method for achieving VPWS redundancy protection rapid convergence and relates to the technical field of network communication. The system comprises an access-side PE device A, a convergence-side primary PE device B and a convergence-side standby PE device C. The access-side PE device A comprises a first BFD/MPLS-TP OAM module, a first VPWS control module and an ARP/NDP caching transmitting module. The convergence-side primary PE device B comprises a second BFD/MPLS-TP OAM module, a second VPMS control module and a first ARP/NDP module. The convergence-side standby PE device C comprises a third BFD/MPLS-TP OAM module, a third VPWS control module and a second ARP/NDP module. By the adoption of the system and method for achieving VPWS redundancy protection rapid convergence, rapid switching of downlink services can be achieved, the protection requirement of interruption of a telecommunication network at the level of 50ms can be met, the stability and the safety of the network are improved, and the user experience is improved.

A MPLS-TP network includes a first router, at least one second router, and a third router. The first router is set to a MEP and generates and transmits a link trace packet. The second router is set to an MIP, generates a response packet in response to reception of the link trace packet, transmits the response packet in a direction of the first router, and forwards the link trace packet. The third router is set to the MEP, generates a response packet in response to reception of the forwarded link trace packet, and transmits the response packet in the first router direction.

The present invention relates to communication field, wherein an embodiment of the invention discloses an ECMP path soft recovery method in a MPLS-TP packet transfer network. The embodiment of the invention comprises the following steps: realizing functions of congestion discovering, congestion positioning, etc. by the expanded OAM information; transmitting TDM grouping dynamic clock by MPLS-TP for adjusting operation; path cracking of the bypass heavy routing; when congestion occurs, firstly adjusting TDM service data grouping length through a source end for improving the delay characteristic; adopting a local service for shunting to the service with overhigh speed for steering clear of the congestion routing; if local link resource is insufficient, informing the source end for adjusting the bandwidth allocation, allocating higher bandwidth resource on the other N-1 paths; if no enough resources can be allocated or the allocated resources are not adjusted under the principle of simplifying the operation, informing the routing module by the source end, and completing the calculation of the other routing through the mode of incremental computation according to the bandwidth request amount. The method of the invention reduces the time for recovering network congestion. The network flexibility can be enhanced through the mode of self-adapting grouping variable-length transmission, and the using efficiency of the protected resource is increased. The quick performance recovery of the service is realized through the mode of bypass heavy routing cracking. The quick combining operation at the branching point is completed with a special numbering and a signaling process.

The invention discloses a dual homing protection method. The method comprises the following steps of: when main equipment of the VRRP monitors an uplink failure, carrying out main/standby switching of a VRRP (Virtual Router Redundancy Protocol) and notifying downlink equipment to carry out switching in an MPLS-TP (Multiple protocol Label Switching-Transport Profile) network; when a link switching appears in the MPLS-TP network, informing the previous main equipment of VRRP by the switched main equipment to carry out the corresponding main/standby switching. Based on the same invention concept, the invention further provides equipment to solve the problems that forward and backward paths are not identical and a link is impassable when an access link breaks down.

A source node encapsulates, in a data plane protocol packet, a forward tunnel control message according to a control plane protocol and having an Extended Association Object, and forwards the data plane protocol packet from a source node to a destination node, through a data plane channel. The destination node extracts the Extended Association Object from the data plane protocol packet. Based, at least in part, on the extracted Extended Association Object, the destination node provisions a reverse tunnel from the destination node to the source node, and binds the forward tunnel to the reverse tunnel.

The invention discloses a multicast method and a device of service messages. Multicast of the service messages are achieved through a P2P path, so rapid fault detection and protection switching are achieved and the multicast method and the device are suitable for deployed MPLS-TP-based devices. The multicast method comprises steps of: receiving a service message sent by a multicast source server and a target IP address of the multicast message, wherein the target IP address comprises IP addresses of multiple multicast clients; and according to the target IP address of the multicast message, by use of a point-to-point P2P path between nodes in a packet transport network PTN, the service message is copied and forwards to the multicast clients corresponding to the target IP address.

The disclosure claims a method for measuring throughput and a Maintenance End Point (MEP). The method is applied in the Multi-Protocol Label Switching-Transport Profile (MPLS-TP) network. The method comprises the following steps: a first MEP in the MPLS-TP network performs the transmission of the data packets with a second MEP in the MPLS-TP network in a preset time period; after the preset time period, the first MEP receives measurement information fed back by the second MEP, wherein the measurement information indicates the number of data packets transmitted by the second MEP in this transmission; according to the measurement information, the first MEP judges that packet loss does not occur in this transmission of the data packets and the transmission rate meets the requirement of target precision, and then obtains the throughput of the transmission of the data packets in the transmission direction. According to the technical solutions provided by the disclosure, measurement cost can be saved and operation and maintenance can be simplified.

The invention discloses a message sending method and device, which are used for uniformly sending a CFM (Connectivity Fault Management) message and a MPLS-TPOAM (Multi-Protocol Label Switching-Transport Profile Operation, Administration and Maintenance) message through the same message. The message sending method provided by the invention comprises the following steps: a CFM message assembling module generates and encapsulates the CFM message at a preset period; a CFM message parsing module parses the CFM message encapsulated by the CFM message assembling module, judges whether the CFM message needs to be reassembled according to a multi-protocol label switching-transport profile (MPLS-TP) and determines that the reassembled CFM message needs to detect a channel or a pseudo wire (PW) when MPLS-TP reassembly is needed; when the CFM message needs MPLS-TP reassembling, a message reassembling module encapsulates the CFM message once again; and the message sending module sends the encapsulated CFM message or the MPLS-TPOAM message.

The invention discloses a method for fast protecting a ring network based on a multi-protocol label switching transport profile (MPLS-TP). The method is implemented when the 1) ring network goes wrong and the 2) ring network inversely recovers. The method ensures that an Ethernet multi-ring network can converge within 50ms after link switching. Compared with the conventional Wrapping protection scheme, the scheme saves bandwidths and can be well matched with a Steering protection scheme, which has great significance for improving the performance of the ring network based on the MPLS-TP technology.

The invention provides a service link tracking realization method and a service link tracking realization device, which are applied to a multi-protocol label switching-transport profile (MPLS-TP) network. The method comprises the following steps of: detecting the amount N of transmitting node equipment between a first maintenance end point and a second maintenance end point when a message is transmitted from the first maintenance end point to the second maintenance end point; transmitting a first loopback request message to the second maintenance end point, wherein the set time to live of the first loopback request message corresponds to time required by the transmission of the first loopback request message to the Mth node equipment, and M is less than or equal to N; and receiving a first loopback response message in response to the first loopback request message from the Mth node equipment, and reporting link information between the first maintenance end point and the Mth node equipment. By the method and the device, actual service traffic conditions between a source-end maintenance end point (MEP) and a destination-end MEP can be completely acquired, and the function of performing link tracking on a point-to-point co-routing bidirectional path in the MPLS-TP network is realized.

A method of and a device for enabling load balancing for Multiprotocol Label Switching Transport Profile (MPLS-TP) are provided. The method is applied to a process of transmitting data between two Provider Edge (PE) devices that adopt a protection mechanism of primary and backup tunnels. The method comprises allocating, by a source PE device located at a head node of a tunnel, traffic to each of the primary and backup tunnels in a current transmission period based on transmission performance information about each of the primary and backup tunnels in a previous transmission period fed back by a destination PE device located at a tail node of the tunnel, when a set transmission period comes; and obtaining, by said source PE device, the traffic allocated to each of the tunnels and transmitting data to the destination PE device via the corresponding tunnels.

The embodiment of the invention discloses a method and device for switching OAM (Operations, Administration and Maintenance) between MPLS (Multiple-Protocol Label Switching) and MPLS-TP (Multiple-Protocol Label Switching-Transport Profile). The method comprises the following steps of: receiving an MPLS-TP OAM message sent by an MPLS-TP node, wherein the MPLS-TP OAM message contains an LSP (Label Switch Path) label, a GAL (General Alert Label) field, an ACH (Associated Channel Header) field and an MPLS-TP OAM PDU (Packet Data Unit) field; acquiring first switching information according to the MPLS-TP OAM message, wherein the first information contains an IP source address and a UDP source port number; converting the MPLS-TP OAM message into an MPLS OAM message according to the first switching information; and sending the MPLS OAM message to an MPLS node. The method and device disclosed by the invention are applicable to OAM switching between the MPLS and the MPLS-TP.

The invention discloses a method and device for rapidly configuring POTN services based on an OpenFlow flow table, and relates to the technical field of POTN service configuration. The method comprises the steps of: creating an OpenFlow matching flow table; sending the OpenFlow matching flow table to a switch by an SDN controller; when the switch receives a data packet, matching the port number of the data packet in a port matching table of the OpenFlow matching flow table, so that the service type corresponding to the data packet is obtained; according to the service type, performing label matching in the corresponding label matching table; and finally, according to the current label state, matching the processing action corresponding to the data packet in a processing action matching table according to corresponding service requirements, and correspondingly encapsulating the data packet according to the matched processing action. By means of the method and the device disclosed by the invention, rapid configuration of Ethernet services, MPLS-TP services and ODUK services can be realized; the frequent bandwidth and path adjustment requirements can be satisfied; and thus, management, operation and maintenance of a network are simple and high-efficiency.

The invention discloses a method and device for achieve a bidirectional segment routing tunnel and relates to the MPLS/MPLS-TP network SR tunneling technology. The method for achieving the bidirectional segment routing tunnel includes: after receiving a command of creating a bidirectional SR tunnel between a node A and a node Z, a controller calculates a path that meets a command requirement between the node A and the node Z, separately allocates unique List SIDs to a first direction A->Z tunnel and a second direction Z->A tunnel corresponding to the path, and separately configures that the List SID of the first direction A->Z tunnel and the List SID of the second direction Z->A tunnel as a binding relationship of the bidirectional tunnel at the node A and the node Z; and the controller places the List SIDs, as a part of a SR label stack, into the label stack at the two endpoints of the tunnel and pushes the same into a user message and forwards the message.

The invention provides a method a system for processing OAM (operation, administration and maintenance) detecting results in an MPLS-TP (multiple protocol label switching-transmission parameter) network. The method includes following steps: receiving CCM (confidential code message); processing the CCM to obtain a processing result; judging whether the processing result has errors or not, if yes, entering a subsequent step, namely processing, and if not, stopping processing; judging whether the error type needs to copy the message to be sent a CPU (central processing unit) or not, if yes, sending the message, and if not, stopping processing; judging whether the error type needs to be recorded in an ErrorCache and reported the errors through the ErrorCache or not, if yes, performing ErrorCache processing, and if not, stopping processing; and judging whether the error type needs to report the errors by sending quick switching information, if yes, marking the errors with needs to send the quick switching information, and if not, stopping processing. Consequently, one or multiple error informing mechanisms can be provided flexibly and diversely aiming at different error types to meet requirements of the system.

The invention discloses a method for achieving Linktrace of multi-protocol label switching-transmission parameter (MPLS-TP) operation, administration and maintenance (OAM) on the basis of a field programmable gata array (FPGA). The method includes the following steps: (1) an exchange chip receives a Linktrace response message which is forwarded to the FPGA in a system; (2) an MPLS-TP OAM engine achieved by the FPGA is used for processing the Linktrace response message, and processing results are placed in a special memory of the OAM engine to be stored; (3) and a central processing unit (CPU) reads and displays directly from the special memory of the OAM engine. Due to the method for achieving the Linktrace of the MPLS-TP OAM on the basis of the FPGA, the CPU cannot be impacted when the system receives a large amount of Linktrace response messages.