WO2012068866A1 - Procédé et système de rafraîchissement d'une commande d'accès au support dans un réseau en anneau ethernet - Google Patents

Procédé et système de rafraîchissement d'une commande d'accès au support dans un réseau en anneau ethernet Download PDF

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Publication number
WO2012068866A1
WO2012068866A1 PCT/CN2011/075522 CN2011075522W WO2012068866A1 WO 2012068866 A1 WO2012068866 A1 WO 2012068866A1 CN 2011075522 W CN2011075522 W CN 2011075522W WO 2012068866 A1 WO2012068866 A1 WO 2012068866A1
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Prior art keywords
node
type
ring network
ethernet ring
link
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PCT/CN2011/075522
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English (en)
Chinese (zh)
Inventor
曾红李
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中兴通讯股份有限公司
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Publication of WO2012068866A1 publication Critical patent/WO2012068866A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/42—Loop networks
    • H04L12/437—Ring fault isolation or reconfiguration
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H04L12/4604—LAN interconnection over a backbone network, e.g. Internet, Frame Relay
    • H04L12/462—LAN interconnection over a bridge based backbone

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and system for refreshing a MAC (Media Access Control) in an Ethernet ring network.
  • Background technique MAC (Media Access Control)
  • Ethernet networks such as reliability
  • STP Segning Tree Protocol
  • Ethernet ring network there are usually multiple communication paths, which implements redundant backup between the primary path and the alternate path.
  • the primary path and the alternate path are intact, the protected data forwarding function of the standby path is blocked, and the protection data between the networks is transmitted on the primary path.
  • the primary path fails, the protection data forwarding function of the alternate path is enabled, and the protection data of the network is switched to the alternate path for transmission, thereby realizing the network to switch from the normal state of the path to the fault state, thereby improving the network's anti-fault capability.
  • Figure la is a schematic diagram of the protection technology of the Ethernet ring network.
  • nodes A1, A2, A3, and B are nodes supporting the Ethernet ring switching function.
  • Network N and Node B are connected, and network M and node A2 are connected. .
  • the master node, the transit node, the master port of the master node, the slave port of the master node, and the ring protection link are usually involved.
  • the link that is formed by the loop protection link can be used to perform the primary path and backup of the ring network. The switching of the path.
  • the master node is directly connected to the ring protection link, and blocks the data packets forwarded by the port directly connected to the ring protection link if the ring network is not faulty.
  • the primary node is also known as the control node.
  • the port that the master node directly connects to the ring protection link is the slave port when the ring network is faulty.
  • the other port that sends the probe loop packet is the master port.
  • the nodes protected by the ring network are Al, A2, A3, and B, and the links included are ⁇ A1, A2>, ⁇ A2, A3>, ⁇ A3, B>, and ⁇ 8, into 1 >.
  • the node A2 is the master node, and the link ⁇ input 2, incoming 3> directly connected to the port 22 of the node A2 is a ring protection link.
  • Port 21 of A2 is the master port, and port 22 is the slave port.
  • the other nodes on the ring except A2 are transit nodes.
  • the master node blocks the data forwarding function of the slave port connected to the ring protection link. No loop occurs in the network, which prevents the "broadcast storm" caused by the network loop.
  • the communication paths of networks N and M at this time are: N ⁇ ->B->A1 ⁇ ->A2 ⁇ ->M.
  • the master node releases the data packet forwarding function of the slave port, and informs other transit nodes to refresh their MAC forwarding address table.
  • the master node can learn the fault status of the link on the ring through the alarm packet.
  • the two transmission nodes directly connected to the faulty link detect the fault, and send fault alarms (LINK-DOWN) on the ring network through the faultless port.
  • the node After receiving the LINK-DOWN packet, the node does not process the LINK-DOWN packet and forwards the LINK-DOWN packet to the master node.
  • the master node learns that the link on the ring is faulty.
  • the master node When the master node learns that the link on the ring is faulty, it notifies other transit nodes on the ring to refresh its MAC forwarding address table. After receiving the LINK-DOWN packet, the master node releases the data packet forwarding function of the slave port, refreshes the MAC address forwarding table, and periodically sends ring network refresh packets on the ring network through the master port and the slave port.
  • RING_DOWN_FLUSH_FDB when the other transit nodes on the ring receive the RING_DOWN_FLUSH_FDB packet, they refresh their MAC forwarding address table to implement Ethernet ring network protection. As shown in Figure lc, the ⁇ A1-A2> link on the ring is faulty.
  • the master node A2 releases the data packet forwarding function from port 22 and periodically sends the ring network through the slave port 22 on the ring network. After the packet is refreshed, the other transit nodes A3, B, and A1 on the ring network refresh their MAC address forwarding table after receiving the ring refresh packet.
  • the communication paths of networks N and M are updated as follows: N ⁇ ->B ⁇ ->A3 ⁇ ->A2 ⁇ ->M.
  • An object of the present invention is to provide a method and system for refreshing a MAC in an Ethernet ring network, which can better solve the problem that when devices of different manufacturers form an Ethernet ring network, the MAC cannot be quickly refreshed. The problem of not meeting the requirements of the carrier level is not achieved.
  • a method for refreshing a MAC in an Ethernet ring network comprising a first type of node having intermediate nodes and boundary nodes performing the same private ring network protocol and a public protocol, and executable At least one second type of node of the public protocol; the method comprises: when the first type of node detects that the Ethernet ring link is faulty, sending a topology change of the public protocol to the second type of node through the boundary node of the first type of node Packet, refreshing the second type of node MAC forwarding address table;
  • the first type of node MAC forwarding address table is refreshed by sending a topology change packet of the public protocol to the border node of the first type node.
  • the method further includes: before the first type of node detects that the Ethernet ring link is faulty, before the border node of the first type node sends the topology change packet of the public protocol to the second type node, the method further includes: The boundary node of the first type of node sends a ring refresh message to all nodes except the boundary node in the first type of node on the Ethernet ring network, and refreshes the MAC forwarding address table of all the first type nodes.
  • the topology change message sent by the border node of the first type node to the second type node is:
  • the border node generates and sends a ring refresh message, and generates and sends a topology change message of the public protocol.
  • the topology change message sent by the border node of the first type node to the second type node is:
  • the intermediate node generates and sends a ring network refresh message
  • the border node of the intermediate node generates and sends a topology change message of the public protocol after receiving the ring network refresh message.
  • the method further includes: receiving, by the boundary node of the first type of node When the topology of the public protocol sent by the second type of node changes the message, it refreshes itself.
  • the MAC forwards the address table, and generates and sends a ring refresh message for refreshing the MAC forwarding address table of the other nodes except the border node in the first type of node.
  • the public protocol is an MSTP (Multi-Spaning Tree Protocol) protocol.
  • MSTP Multi-Spaning Tree Protocol
  • a system for refreshing a MAC in an Ethernet ring network comprising:
  • first type of node having intermediate nodes and boundary nodes that perform the same private ring network protocol and public protocol; and at least one second type node that can execute the public protocol;
  • the first type of node is configured to detect the link state of the Ethernet ring network, and when detecting that the Ethernet ring link is faulty, send a topology change packet of the public protocol to the second type node by using the border node of the first type node. Refreshing the second class node MAC forwarding address table;
  • the second type of node is configured to detect the link state of the Ethernet ring network, and when detecting the fault of the Ethernet ring link, send the topology change packet of the public protocol to the border node of the first type node, and refresh the first Class node MAC forwarding address table.
  • the intermediate nodes of the first type of nodes include:
  • a detecting module configured to detect an Ethernet ring link state
  • the ring refresh message module is configured to generate and send a ring network refresh when the detecting module detects that the Ethernet ring network is faulty;
  • the address refreshing module is configured to refresh the MAC forwarding address table when the detecting module detects that the link is faulty or receives a ring refresh message sent by a node other than itself in the first type of node.
  • the boundary node of the first type of node includes: a detecting module, configured to detect an Ethernet ring link state;
  • the ring network refresh packet module is configured to generate and send a ring network refresh when the detecting module detects that the Ethernet ring network is faulty.
  • the topology change message module is configured to generate and send a topology change when the detection module detects that the Ethernet ring network is faulty or receives a ring refresh message sent by a node other than itself in the first type of node. Obituary;
  • An address refreshing module configured to detect, when the detecting module detects that the link is faulty, or receives a ring refresh message sent by a node other than itself in the first type of node, or receives a topology change sent by the second type of node. When the message is received, the MAC forwarding address table is refreshed.
  • the second type of node comprises:
  • a detecting module configured to detect an Ethernet ring link state
  • the topology change message module is configured to generate and send a topology change message when the detection module detects that the Ethernet ring network is faulty;
  • the address refreshing module is configured to refresh the MAC forwarding address table when the detecting module detects that the link is faulty or receives a topology change packet sent by the border node of the first type of node.
  • the invention has the beneficial effects that: when devices of different manufacturers form an Ethernet ring network, the MAC can be quickly refreshed, so that the switching time reaches the carrier level requirement.
  • FIG. la is a topology diagram of an Ethernet ring network provided by the prior art
  • Figure lc is a topology diagram of a communication path when a link failure occurs in an Ethernet ring network provided by the prior art
  • Figure 2 is an Ethernet ring network provided by the present invention.
  • FIG. 3a is a flowchart of a method for refreshing a MAC in an Ethernet ring network according to an embodiment of the present invention
  • Figure 3d is the information of the master node in the MAC address forwarding table of the second type of node in the Ethernet ring network according to the embodiment of the present invention
  • 3e is a flowchart of triggering an MSTP topology change message when the Ethernet ring network is switched according to an embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of a system for refreshing a MAC in an Ethernet ring network according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of an intermediate node of a first type of node in an Ethernet ring network according to an embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of a boundary node of a first type of node in an Ethernet ring network according to an embodiment of the present invention
  • FIG. 7 is a schematic structural diagram of a second type of node in an Ethernet ring network according to an embodiment of the present invention. detailed description
  • FIG. 2 is a flowchart of a method for refreshing a MAC in an Ethernet ring network provided by the present invention. As shown in FIG. 2, the method includes the following steps:
  • Step S201 All nodes in the Ethernet ring network detect the link state of the Ethernet ring network.
  • Step S203 When the second type of node detects that the Ethernet ring network is faulty, the second type of node MAC forwarding address table is refreshed by sending a topology change packet of the public protocol to the border node of the first type of node.
  • the Ethernet ring network includes a first type of node having intermediate nodes and border nodes that perform the same private ring network protocol and a public protocol, and at least one second type node that can execute a public protocol.
  • FIG. 3 is a flowchart of a method for refreshing a MAC in an Ethernet ring network according to an embodiment of the present invention. As shown in FIG. 3a, an embodiment of the method includes the following steps:
  • Step S301 Configure a ring network protocol in the Ethernet ring network.
  • the ring network includes the first type of nodes Al, A2, A3 and the second type of node B, and the links included are ⁇ A1, A2>, ⁇ A2, A3>, ⁇ A3, B; ⁇ B, A1> link.
  • the first type of nodes are devices of the same manufacturer that run the same private ring network protocol and public protocol simultaneously on the Ethernet ring network.
  • the second type of node is a device of another manufacturer that does not support the private ring network protocol run by the first type of node but can run the public protocol.
  • Al, A2, and A3 run a private ring network protocol with each other and run the MSTP protocol. Unlike the manufacturers of Al, A2, and A3, B does not support the private ring network protocol running between Al, A2, and A3, but can run the MSTP protocol.
  • Step S302 Configure the master node, the master port of the master node, the slave port of the master node, the ring protection link, the border node, and the border port in the Ethernet ring network.
  • node A2 is the master node
  • port 21 is the master port
  • port 22 is the slave port
  • link ⁇ 2, 3> directly connected to port 22 is the ring protection link.
  • Nodes A1 and A3 are boundary nodes
  • A2 is an intermediate node.
  • a boundary node is a node of a first type of node that is directly connected to a second type of node.
  • the intermediate node is the first type of node between two boundary nodes.
  • Port 11 of node A1 is the boundary port
  • port 32 of node A3 is the boundary port.
  • the boundary port is the port of the border node that directly connects to other vendors' devices (the second type of node) on the ring network.
  • Step S303 the node in the Ethernet ring network learns the MAC.
  • the port 21 of the master node A2 is the master port, and is in the forwarding state
  • the port 22 of the A2 port is the slave port and is in the block state.
  • Node B learns the MAC of the A2 node from port 21 of A2.
  • the traffic from the Node B to the A2 node is forwarded from the port 42 of the Node B. For example, if the MAC address of the A2 node is 00:00:00:00:00:02, the forwarding information on the Node B is as shown in Figure 3d.
  • Step S304 The node in the Ethernet ring network detects a link fault, and the border node sends an MSTP topology change packet to the second type node.
  • the link in the ring network fails, the ring network needs to be switched.
  • the nodes at both ends of the fault link first determine whether it is a boundary node. If yes, send the MSTP topology change message to the second type node. If not, then The MSTP topology is not triggered to change the message.
  • A2 checks that the link ⁇ A1, A2> directly connected to it fails, and the master node A2 releases the slave port.
  • the data packet forwarding function of 22, and the ring network refresh packet is sent to A3 by using the private ring network protocol, and the A3 ring network is notified to switch.
  • A3 is a border node.
  • the border node A1 also detects that the link ⁇ 8, 2> directly connected to it is faulty, and sends a topology change of the MSTP to the second type of node B to notify the B-node that the ring network has been switched.
  • Step S305 receiving a node of the Ethernet ring network of the topology change message, and refreshing the MAC.
  • the Node B refreshes its MAC address forwarding table. Since the Node B runs MSTP, it can recognize the topology change message of the MSTP.
  • the node B refreshes the MAC forwarding address table and deletes the data in the MAC forwarding address table.
  • the communication path is updated to: B ⁇ ->A3 ⁇ ->A2.
  • FIG. 4 is a schematic structural diagram of a system for refreshing a MAC in an Ethernet ring network according to an embodiment of the present invention.
  • the system includes: a first type of nodes A1, A2, A3 and a second type of node B.
  • the first type of nodes A1, A2, and A3 are devices of the same manufacturer that perform the same private ring network protocol and public protocol on the ring network.
  • the second type of Node B is a device of another manufacturer that does not support the private ring network protocol operated by the first type of node on the ring network.
  • the nodes of the first type of nodes directly connected to the second type of node B are boundary nodes A1 and A3, and the first type of nodes between the two boundary nodes A1 and A3 are intermediate nodes A2.
  • the first type of node When the first type of node detects that the Ethernet ring link is faulty, it sends a topology change packet of the public protocol to the second type node through its border node, and refreshes the MAC forwarding address table of the second type node. Assume that the link between A1 and A2 is faulty. After detecting the link fault, the border node A1 sends an MSTP topology change packet to B to notify B to refresh its MAC forwarding address table. At the same time, A2 also detects the link fault. A2 sends a ring refresh packet to A1 through the private ring network protocol. After receiving the ring refresh packet of A2, the border node A1 refreshes its MAC address forwarding table and sends MSTP to B. Topology changes the message.
  • the first type of node MAC forwarding address table is refreshed by sending a topology change packet of the public protocol to the border node of the first type node. Assume that the link between B and A1 fails. After B detects the fault, it sends a topology change message to A3 to notify A3 to refresh the MAC forwarding address table. At the same time, A1 also detects the link fault between A1 and B. A1 sends a ring refresh message to the ring away from the fault direction through the private ring network protocol, and notifies other nodes A2 and A3 of the first type node that remove A1. Refresh the MAC forwarding address table.
  • FIG. 5 is a schematic structural diagram of an intermediate node of a first type of node in an Ethernet ring network according to an embodiment of the present invention.
  • an intermediate node of a first type of node includes a detection module 1, an address refresh module 2, and a ring network refresh.
  • Message module 3 The detecting module 1 is configured to detect an Ethernet ring link state; the ring refresh message module 3 is configured to generate a sum when the detecting module 1 detects that the Ethernet ring network is faulty.
  • the ring refreshing packet is sent; the address refreshing module 2 is configured to: when the detecting module 1 detects that the link is faulty or receives a ring refresh message sent by a node other than itself in the first type of node, refreshing the MAC Forward the address table.
  • a boundary node of a first type of node in an Ethernet ring network according to an embodiment of the present invention.
  • a boundary node of a first type of node includes: a detection module 4, an address refreshing module 5, and a ring network.
  • the message module 6 and the topology change message module 7 are refreshed.
  • the detecting module 4 is configured to detect an Ethernet ring network link state, and the ring network refresh message module 6 is configured to generate and send a ring network refresh message when the detecting module 4 detects that the Ethernet ring network is faulty;
  • the text module 7 is configured to generate and send a topology change text when the detection module 4 detects that the Ethernet ring network is faulty or receives a ring network refresh message sent by a node other than itself in the first type node;
  • the module 5 is configured to detect, in the detection module 4, that the link is faulty or receives a ring refresh message sent by a node other than itself in the first type of node, or receives a topology change sent by the second type of node. When the message is received, the MAC forwarding address table is refreshed.
  • FIG. 7 is a schematic structural diagram of a second type of node in an Ethernet ring network according to an embodiment of the present invention.
  • the second type of node includes: a detection module 8, an address refreshing module 9, and a topology change message 10.
  • the detecting module 8 is configured to detect an Ethernet ring network link state;
  • the topology change message module 10 is configured to generate and send a topology change message when the detecting module 8 detects that the Ethernet ring network is faulty; the address refreshing module 9
  • the detecting module 8 detects that the link is faulty or receives a topology change message sent by the border node of the first type node, refreshing the MAC forwarding address table.
  • the present invention solves the device composition of different manufacturers by configuring the boundary node in the Ethernet ring network and transmitting the MSTP topology change message to the device of the other manufacturer (the second type node) through the border node.
  • the ring network fails to connect successfully, the MAC address cannot be refreshed quickly, resulting in the problem that the switching time cannot meet the carrier-class requirements.
  • the invention has the following technical effects: When the devices of different manufacturers form a ring network, the MAC can be quickly refreshed, thereby achieving the requirements of the carrier class.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

La présente invention concerne un procédé et un système de rafraîchissement d'une commande d'accès au support (MAC) dans un réseau en anneau Ethernet. Le réseau en anneau Ethernet comporte des noeuds d'un premier type comprenant des noeuds intermédiaires et des noeuds limites qui exécutent le même protocole de réseau en anneau privé et protocole public, et au moins un noeud d'un second type qui peut exécuter le protocole public. Le procédé selon l'invention comprend les étapes suivantes : tous les noeuds du réseau en anneau Ethernet détectent les états des liaisons du réseau en anneau Ethernet (S201); lorsqu'un noeud du premier type détecte l'apparition d'un dérangement dans une liaison du réseau en anneau Ethernet, le noeud du premier type transmet au moyen du protocole public un message de changement de topologie aux noeuds du second type par l'intermédiaire des noeuds limites du noeud du premier type, et un tableau d'adresses de réacheminement MAC du noeud du second type est rafraîchi (S202); lorsqu'un noeud du second type détecte l'apparition du dérangement dans la liaison du réseau en anneau Ethernet, par transmission d'un message de changement de topologie au moyen du protocole public aux noeuds limites du noeud du premier type, le tableau d'adresses de réacheminement MAC du noeud du premier type est rafraîchi (S203). La présente invention permet de résoudre le problème lié au fait que le temps de transfert intercellulaire ne peut pas répondre à l'exigence de la classe d'opérateur en raison de l'impossibilité de réussir un raccord à bride lisse et de l'impossibilité de rafraîchir rapidement la commande MAC, lorsque des dispositifs de différents fabricants forment un réseau en anneau.
PCT/CN2011/075522 2010-11-24 2011-06-09 Procédé et système de rafraîchissement d'une commande d'accès au support dans un réseau en anneau ethernet WO2012068866A1 (fr)

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CN201010557589.7A CN102025561B (zh) 2010-11-24 2010-11-24 一种以太环网中刷新mac的方法及系统
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