3 results about "Multiple spanning tree protocol" patented technology

The invention provides a method, system and device for realizing flow load sharing among a plurality of MST domains, and the method comprises the steps: configuring the same VLAN (Virtual Local Area Network) division scheme for all switching equipment of the plurality of MST domains in an MSTP (Multiple Spanning Tree Protocol) network; the mapping relation information between the same global VLAN and the global Instance is configured; switching equipment between different MST domains is distinguished; and independently calculating a spanning tree for each global Instance without distinguishing whether the switching equipment is in the same MST domain. According to the scheme, the VLAN is divided into the global VLAN and the common VLAN, and the mapping relation between the global VLAN and the global Instance is established, so that a GSTI topology is independently calculated for each global Instance; when a plurality of links exist between MST domains, different data transmission topologies are generated for different global Instances by adjusting the global Instance bridge priority and port path overhead of each device, so that the load sharing of traffic between different MST domains is effectively realized.

This application provides a method and apparatus for bidirectional interactive Spanning Tree Protocol (STP) boundary protection. In this method, a handover device across multiple STP domains identifies the protection policy of the domain boundary port of a received STP message as a root protection policy; determines that the root bridge priority of the STP message is higher than the overall root bridge priority of the MSTP domain to which the device belongs; sets a root protection blocking state for the domain boundary port while maintaining normal link-layer connectivity; and sends back an STP response message through the domain boundary port. The STP response message carries a specified valid root identifier and the maximum abnormal root path cost. This enables the device receiving the STP response message to perform root protection processing based on the maximum abnormal root path cost, thereby preventing root migration.

The invention discloses a data transmission method and device of a ship communication system based on a time sensitive network, and belongs to the technical field of ship communication, and the method comprises the steps: under the condition that a first ring network and a second ring network are normal, transmitting target service data through the first ring network and the second ring network according to a preset hot redundancy elimination protocol; and under the condition that the first ring network or the second ring network has the in-ring fault, activating a standby path of the ring network with the in-ring fault according to a multi-spanning tree protocol, and sending the target service data through the standby path of the ring network with the in-ring fault and the ring network without the fault according to a preset hot redundancy elimination protocol. According to the method, the double-ring network time-sensitive network is constructed, high-reliability data transmission is realized through the two redundant links, the data transmitted between the double rings are completely consistent based on the multi-spanning tree protocol and the hot redundancy elimination protocol, and the data transmission is not interrupted when a single link fails, so that the reliability of data transmission of the ship communication system is improved.