# US 2014/0153445 A1 · Method, System, and Switch for Making Bridge in MSTP Join Region > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0153445 A1 - Document ID: US20140153445A1 - Status: Published application - Kind: A1 - Application number: 14/175,245 - Filed: 2014-02-07 - Published: 2014-06-05 - Earliest claimed: 2011-08-09 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Jianbing Huang - Web page: https://patentgrep.com/patent/US20140153445A1 ## CPC - H04L 45/48: Routing tree calculation - H04L 12/462: {LAN interconnection over a bridge based backbone} - H04L 41/12: Discovery or management of network topologies - H04L 45/18: Loop-free operations - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A method, a system, and a switch for making a bridge in the Multiple Spanning Tree Protocol (MSTP) join a region. A root bridge in a multiple spanning tree instance (MSTI) to be generated acquires region information of the MSTP; and sends a region join packet carrying the region information of the MSTP to a downstream bridge after the region information of the MSTP is configured on the root bridge, so that the downstream bridge configures the region information of the MSTP to region information of the downstream bridge. Region information may be configured on a root bridge of the MSTP and notified to a downstream bridge, so that all bridges of the MSTP join a region in which the root bridge resides. ## Claims ### Claim 1 A method for making a bridge in a Multiple Spanning Tree Protocol (MSTP) join a region, comprising: receiving, by a downstream bridge, a region join packet sent by an upstream node, wherein the region join packet carries region information of the MSTP; and configuring, by the downstream bridge, the region information of the MSTP to local region information. ### Claim 2 (depends on 1) The method according to claim 1, wherein configuring the region information of the MSTP to local region information comprises configuring, by the downstream bridge, the region information of the MSTP to the local region information after receiving the region join packet. ### Claim 3 (depends on 2) The method according to claim 2, further comprising sending a region join packet that carries the region information of the MSTP to a downstream node when the downstream node exists in the downstream bridge so that the downstream node configures the region information of the MSTP to region information of the downstream node. ### Claim 4 (depends on 3) The method according to claim 3, wherein prior to receiving the region join packet, the region information of the MSTP is acquired by a root bridge in a multiple spanning tree instance (MSTI) to be generated and the region information of the MSTP is configured on the root bridge when the upstream node is the root bridge. ### Claim 5 (depends on 1) The method according to claim 1, wherein configuring the region information of the MSTP to local region information comprises: comparing, by the downstream bridge, a region name in the region information of the MSTP with a region name configured on the downstream bridge after receiving the region join packet; and configuring the region information of the MSTP to the local region information when the region name in the region information of the MSTP is the same as the region name configured on the downstream bridge after receiving the region join packet. ### Claim 6 (depends on 5) The method according to claim 5, further comprising sending a region join packet that carries the region information of the MSTP to a downstream node when the downstream node exists in the downstream bridge so that the downstream node configures the region information of the MSTP to region information of the downstream node. ### Claim 7 (depends on 6) The method according to claim 6, wherein prior to receiving the region join packet, the region information of the MSTP is acquired by a root bridge in a multiple spanning tree instance (MSTI) to be generated and the region information of the MSTP is configured on the root bridge when the upstream node is the root bridge. ### Claim 8 (depends on 1) The method according to claim 1, further comprising sending a region join packet that carries the region information of the MSTP to a downstream node when the downstream node exists in the downstream bridge so that the downstream node configures the region information of the MSTP to region information of the downstream node. ### Claim 9 (depends on 1) The method according to claim 1, wherein prior to receiving the region join packet, the region information of the MSTP is acquired by a root bridge in a multiple spanning tree instance (MSTI) to be generated and the region information of the MSTP is configured on the root bridge when the upstream node is the root bridge. ### Claim 10 A switch, comprising: a receiver adapted to receive a region join packet sent by an upstream node, wherein the region join packet carries region information of the Multiple Spanning Tree Protocol (MSTP); and a configuring module adapted to configure the region information of the MSTP to local region information. ### Claim 11 (depends on 10) The switch according to claim 10, wherein the configuring module is adapted to configure the region information of the MSTP to the local region information after the region join packet is received. ### Claim 12 (depends on 11) The switch according to claim 11, further comprising a sender adapted to send a region join packet that carries the region information of the MSTP to a downstream node when the downstream node exists so that the downstream node configures the region information of the MSTP to region information of the downstream node. ### Claim 13 (depends on 10) The switch according to claim 10, wherein the configuring module is adapted to: compare a region name in the region information of the MSTP with a region name configured on the switch after the region join packet is received; and configure the region information of the MSTP to the local region information when the region name in the region information of the MSTP is the same as the region name configured on the downstream bridge after receiving the region join packet. ### Claim 14 (depends on 13) The switch according to claim 13, further comprising a sender adapted to send a region join packet that carries the region information of the MSTP to a downstream node when the downstream node exists so that the downstream node configures the region information of the MSTP to region information of the downstream node. ### Claim 14 (depends on 10) The switch according to claim 10, further comprising a sender adapted to send a region join packet that carries the region information of the MSTP to a downstream node when the downstream node exists so that the downstream node configures the region information of the MSTP to region information of the downstream node. ### Claim 15 (depends on 10) The switch according to claim 10, wherein the region information of the MSTP is acquired by a root bridge in a multiple spanning tree instance (MSTI) to be generated and the region information of the MSTP is configured on the root bridge when the upstream node is the root bridge. ### Claim 16 A network system, comprising: a downstream bridge; and a root bridge adapted to send acquired region information of a Multiple Spanning Tree Protocol (MSTP) to the downstream bridge, wherein the downstream bridge is adapted to configure the region information of the MSTP to region information of the downstream bridge. ### Claim 17 (depends on 16) The system according to claim 16, wherein the downstream bridge comprises: a receiver adapted to receive a region join packet sent by an upstream node, wherein the region join packet carries region information of the MSTP; and a configuring module adapted to configure the region information of the MSTP to local region information, and wherein the root bridge comprises: an acquiring module adapted to acquire region information of the MSTP; and a sender adapted to send a region join packet to a downstream bridge after the region information of the MSTP is configured on the switch, wherein the region join packet carries the region information of the MSTP so that the downstream bridge configures the region information of the MSTP to region information of the downstream bridge.