45 results about "Ethernet Ring Protection Switching" patented technology

The present invention provides a protection switching method of a node having communication failure in a ring, in a communication network. In one embodiment, this is accomplished by checking for loss of signal (LOS) at the non-ERPS device or at least one of the node in a communication channel, checking periodically for Continuity Check Message (CCM) at both the node, wherein the CCMs are periodically transmitted from both the node through at least one non-ERPS device, appropriately setting a Remote Destination Indication (RDI) bit in the Continuity Check Message (CCM) generated from at least one node and transmits the same via the non-ERPS device or through the non-ERPS device or through a disjoint communication channel, and blocking port of the node towards the non-ERPS device upon receipt of the fault notification and transmitting signal fail notification message on both the ports in the ring.

A method and system for protection switching in Ethernet rings are disclosed. The method for protection switching in Ethernet rings includes: receiving a server signal fail (SSF), an Ethernet lower layer fault signal, a remote defect indication (RDI) for informing a different port about a fault state when a uni-directional fault is generated, and ring-automatic protection switching (R-APS) information for requesting Ethernet ring protection switching; comparing the SSF, the RDI, and the R-APS information, and setting states of the first and second Ethernet rings; determining a protection switching priority level of each of the first and second Ethernet rings according to the states of the first and second Ethernet rings; and performing protection switching on the first and second Ethernet rings according to their protection switching priority levels.

The present invention relates to a protection switching method in a communication network, the communication network including plurality of communication devices forming a linear chain and at least one non-ERPS on the nodes ERPS (Ethernet Ring Protection Switching) device connecting terminal ports of the linear chain and thereby forming a ring. In one embodiment this is accomplished by instantiating ERPS on each communication device that forms a linear chain and on each non-terminal ports of the linear chain, identifying a node or link fault in the network, wherein the link or node fault is detected by Continuity Check Message (CCM), Loss of Light (LOL), Loss of Signal (LOS), Loss of periodic continuity check messages (IEEE 802.1 ag) or any other mechanisms thereof, blocking ports of the communication device in response to the detection of fault, periodically broadcasting a fault message by the blocked ports of the communication devices, wherein the message gets terminated at the ports of the communication device within the linear chain network without reaching the non-ERPS device, flushing the Media Access Control (MAC) table entry upon receipt of the fault message by all the communication device and unblocking of a root port link (RPL) of the linear for providing an alternate path to route network traffic after receipt of the fault message.

The present invention relates to the technical field of communications. Disclosed in an embodiment of the present invention are an Ethernet ring protection switching method, node and system, capable of switching a service transmission path according to the bandwidth of a link and maximizing the service capacity of an Ethernet ring network. The method of the present invention comprises: according to the bandwidth information of a current link and the bandwidth information of other links on the ring, judging whether the current link is a low-bandwidth link; if the current link is a low-bandwidth link, then blocking the port corresponding to the current link; if the current link is not a low-bandwidth link, then enabling the port corresponding to the current link. The embodiment of the present invention is mainly used in the process of Ethernet ring protection switching.

The invention discloses a method and a system for implementing flexible Ethernet protection switching based on an overhead reserving field, and relates to the field of flexible Ethernet. The method comprises the following steps as follows: the overhead reserving field in an overhead frame specified by a flexible Ethernet FlexE protocol is used as automatic protection switching (APS) overhead, andthe APS overhead corresponding to the first 20 frames in a multiframe defined by the FlexE protocol is used for carrying APS information of a corresponding time slot; if a service supported by the FlexE protocol is corresponding to the plurality of time slots, a sending terminal inserts the APS overhead into the multiframe corresponding to the time slot in the plurality of time slots correspondingto the service, and sends the same to a receiving terminal via an APS information transmission channel; and the receiving terminal selects the APS overhead corresponding to the multiframe overhead toserve as the APS information of the service. According to the method and system provided by the invention, the switching can be achieved via a switching command, with no need to depend on line warning, and the scene that the line interface does not have the warning and thus the service is interrupted can be processed.

Methods and systems are provided for migrating loop-breaking protocols in an Ethernet network. The method includes disabling a port of a first leaf network element in a network implementing a rapid spanning tree protocol (RSTP), the RSTP having a spanning tree with a root network element coupled to the first leaf network element forming a first branch of the spanning tree; migrating the first leaf network element by disabling the RSTP and enabling an Ethernet ring protection switching (ERPS) protocol on the first leaf network element; migrating the root network element after the first leaf network element by disabling the RSTP and enabling the ERPS protocol on the root network element; and enabling the port of the first leaf network element after migrating the first leaf network element and the root network element.

Systems are disclosed for automated protection switching enabled by in-band signaling. A status monitor coupled to a switch fabric may be operable to read signal quality information from cells packet-switched over the fabric, the cells carrying traffic signals from one or more working channels between two network nodes. The status monitor may apply a protection algorithm to the signal quality information to determine whether a traffic signal on a working channel meets requirements indicative of channel failure or degradation sufficient to move the traffic signal to an additional protection channel between the two nodes. The status monitor may encode a request to transfer this traffic signal in cells switched by the fabric. In some examples, this request may be encoded in an optional user and fabric overhead field of cells consistent with the Optical-Transport Network (OTN) over Packet Fabric Protocol (OFP).

The invention relates to a virtual-private-network-based multi-instance Ethernet ring protection switching method, which comprises the following steps of: (1) creating virtual-private-network-based Ethernet ring protection instances; (2) mapping virtual private network service groups to the Ethernet ring protection instances; and (3) mapping control virtual private network services to the Ethernet ring protection instances. The method has the advantages of: 1, the basis of a virtual private network, namely independent protection switching control is performed on logical rings formed by different virtual private network services; 2, a plurality of instances, namely a plurality of ring instances can be created according to different virtual private network service groups at an identical physical port; 3, the virtual private network service groups, namely the virtual private network services with the same logical topology form a group, and the virtual private network service groups can be mapped into one or more ring instances; and 4, the control virtual private network services, namely private Ethernet ring protection switching control channels are provided the protection switching control over the ring instances.

The application provides a link state checking method and device based on ERPS (Ethernet Ring Protection Switching), which are applied to a main node of an Ethernet ring network. The main node comprises a main port and an auxiliary port which are adjacent to adjacent nodes, wherein the auxiliary port is in a blocked state when a target link is normal. The method comprises the steps of: based on apreset period, sending a health state checking message by the main port; and if not receiving the health state checking message from the auxiliary port in a preset time-out period, determining that the target link has a fault. According to the application, resource consumption generated when each node CPU processes a CCM (Continuity Check Message) is reduced, and the link state checking method anddevice avoids the problem that each node CPU processes a great amount of messages to cause packet loss of the CCM so as to generate misjudgment on a link state of the Ethernet ring network and even cause frequent link switching of the Ethernet ring network.

Methods and systems are provided for managing an Ethernet ring protection switching (ERPS) protocol in an Ethernet network. The method includes receiving an administrative data packet at a first network element; determining whether the administrative data packet contains an ERPS membership setting from a second network element; when the administrative data packet contains the ERPS membership setting from the second network element, comparing an ERPS membership setting at the first network element to the ERPS membership setting from the second network element; and performing an action when the ERPS membership setting at the first network element is different than the ERPS membership setting from the second network element.

The invention provides a method for optimizing a path on an Ethernet ring protection switching ring. The method comprises the following steps: the optimization function of EPRS is triggered by carrying link quality attributes in a sent message (NR, RB) so as to confirm a link with the poorest quality, and a blocked link in an ERPS ring network is switched to the confirmed link with the poorest quality. On the basis of the same conception of the method provided by the invention, the application further provides a device for optimizing the path on the Ethernet ring protection switching ring, so that the use ratio of the bandwidth of the ERPS ring network can be increased.

A method and system for designing Ethernet ring protection services in a network is used to identify a major ring and sub-rings for a dual hub and spoke network architecture.

The invention relates to an Ethernet ring protection switching method for a hybrid network. The method comprises the following steps: 1, establishing an Ethernet ring protection instance based on a virtual private network (VPN); and 2, controlling the mapping from VPN service to the Ethernet ring protection instance, wherein step 1 comprises the following concrete steps: 1.1, establishing the VPNservice; 1.2, judging whether the established VPN service is Ethernet ring service of the control type, if not, not carrying out processing, and otherwise, establishing the Ethernet protection instance (including adding the configuration information of the Ethernet protection instance, establishing a ring port of the Ethernet ring instance, and establishing the mapping from a VPN service group tothe instance; and 1.3, judging whether the configuration information of the Ethernet protection instance is successfully added, judging whether the ring port of the Ethernet ring instance is successfully established, and judging whether the established VPN service group is successfully mapped to the instance, if yes, judging that the Ethernet ring protection instance based on the VPN is successfully established.

An embodiment of the invention provides a method, a system and a DHCP server for realizing load balance of network equipment. The method , the system and the DHCP server are applied in an Ethernet ring protection switching (ERPS) ring network which is composed of (2N+1) sets of core equipment. The method comprises the following steps of receiving a DHCP request which is transmitted by a client and carries virtual gateway address information that corresponds with a VRRP group by the DHCP server; when the total number of the IP addresses which are already distributed to an address pool that corresponds with the virtual gateway address information does not reach a threshold, performing feedback of the IP address to the client according to the address pool which corresponds with the virtual gateway address information; and when the total number of the IP addresses which are already distributed to the address pool that corresponds with the virtual gateway address information reaches the threshold, performing feedback of the IP address to the client according to the address pool which corresponds with real gateway address information. Therefore problems of performance bottleneck of the core equipment and incapability of realizing real-time networking of new users are settled.

The invention provides a method for realizing an Ethernet protection switching. The method comprises: in two data units dual-homed connected in the Ethernet, when a data unit which is transmitting a service learns local link anomalies, inserting an alarm in a time slot of a corresponding system port, and a cross board choosing the system port's time slot of the data unit without the alarm to transmit the service according to a sub-network connection protection. The invention also provides a system for realizing the Ethernet protection switching. The method and the system can effectively solve a problem that in a dual-homed connection, the service cannot be continuously transmitted as normal when a channel is broke down.

Methods and systems are provided for migrating loop-breaking protocols in an Ethernet network. The method includes selecting a virtual local area network (VLAN) implementing a multiple spanning tree protocol (MSTP) from a plurality of VLANs operating on the Ethernet network, the MSTP having a spanning tree with a root network element coupled to a first branch of network elements; disabling a virtual network link in the VLAN; migrating a first leaf network element of the first branch in the VLAN by disabling the MSTP and enabling an Ethernet ring protection switching (ERPS) protocol on the first leaf network element; migrating the root network element in the VLAN after the first leaf network element by disabling the MSTP and enabling the ERPS protocol on the root network element; and enabling the virtual network link after migrating the first leaf network element and the root network element.

The embodiment of the application discloses a ring network anomaly protection method and device. The method may include the following steps: a first node determines that a first port of the first nodeexits an Ethernet ring protection switching protocol (ERPS) ring, wherein the process of exiting the ERPS ring is used for indicating that the first port does not process an ERPS protocol message inthe case of exiting the ERPS ring; the first node blocks a second port, wherein the second port is a port of the first node on the ERPS ring, and the second port is different from the first port; thefirst node sends a first terminal message to the second node, wherein the first node and the second node are both on the ERPS ring, the first node and the second node are different nodes, and the first terminal message is used to indicate that the first port of the first node exits the ERPS ring. By adopting the scheme of the application, the problem that some nodes in the ERPS ring in the prior art may not perform normal communication can be solved.

The invention discloses a method for implementing Ethernet protection switching. The method comprises: S1, two links carrying out service data configuration and issuing are established between a source terminal and a destination terminal, wherein one of the two links serves as a main link and the other one serves as a standby one, the source terminal and the destination terminal are provided with main control protection modules respectively, and the main link and the standby line are equipped with Ethernet OAM units for realizing end-to-end OAM intercommunication of links; S2, the Ethernet OAM units send OAM messages by means of FPGA periodic packet sending, wherein the OAM messages include OAM CV frames for detecting link alarm information and APS frames with cfm ids and the APS frame of the main link is not enabled and the APS frame of the standby link is enabled; and S3, the main control protection modules determine the link states according to the OAM messages of the main link and the standby link respectively; and if a fault occurs at the main link or the main link works normally again or a fault occurs at the standby link after switching of the main link, the main control protection modules of the source terminal and the destination terminal issue a switching command to carry out link switching.

The invention provides an Ethernet service protection method and device. The Ethernet service protection method comprises the following steps: receiving an Ethernet service protection group based on the Ethernet ring protection switching ERPS protocol sent by a webmaster; and protecting the Ethernet service according to the Ethernet service protection group. Through the Ethernet service protectionmethod, the problem of slow convergence of the Ethernet service protection in related technologies is solved, and the convergence speed is improved.

The invention provides a handover processing method and switching equipment realizing the method, wherein by using the method, the handover of the EAPS looped network can be speeded up in case of failed Ethernet automatic protection switching (EAPS) looped network link when two EAPS loops are utilized on the same physical Ethernet ring for load balance. The handover processing method comprises the following steps: node switching equipment in an EAPS loop detects that a link corresponding to a local physical port is failed; the node switching equipment informs other node switching equipment on the two EAPS loops on which the port corresponding to the failed link is located that the loop is failed, executes the operation of refreshing routes on the local failed port, and setting the control VLAN and data VLAN of the local failed port in a blockage mode; and the other node switching equipment on the two EAPS loops executes the operation of refreshing routes on the ports of the two EAPS loops and sets the modes of the control VLAN and data VLAN of the ports after being informed that the loop is failed.