WO2010102490A1

WO2010102490A1 - Address update method for ports of switching node, and switching node in ethernet ring network

Info

Publication number: WO2010102490A1
Application number: PCT/CN2009/074550
Authority: WO
Inventors: 王斌; 吴少勇
Original assignee: 中兴通讯股份有限公司
Priority date: 2009-03-11
Filing date: 2009-10-21
Publication date: 2010-09-16
Also published as: CN101834774A

Abstract

An address update method for ports of switching node in Ethernet ring network is provided by the invention. The method includes: when an Ethernet ring network link is blocked, the two switching nodes at the both ends of the block link periodically send address update messages in the directions away from the block link respectively, the address update messages include media access control (MAC) address lists of the specific switching nodes, and the specific switching nodes are the switching nodes whose MAC address information is included in the address forwarding tables, wherein the tables are learned in special virtual local area network (VLAN) by the ports of the switching nodes generating the address update messages connected to the block link (401); after receiving the address update messages, the switching node judges whether its own MAC address exists in the MAC address lists of the specific switching nodes, and deletes all address forwarding items associated with the ports receiving the address update messages if not exist (402). A switching node is also provided by the invention. The invention can greatly reduce the messages broadcasted for address learning between switching nodes during the network topology changing.

Description

Address refreshing method and switching node of switching node port in Ethernet ring network

The invention relates to an address refreshing method and a switching node of a switching node port in an Ethernet ring network.

Background technique

In the practical application of Ethernet, various protection technologies are widely used to implement redundant backup between the primary path and the standby path. When the primary path and the alternate path are intact, the alternate path is blocked to enable data to be transmitted on the primary path; when the primary path fails, the alternate path is opened, and data between the networks is switched to the alternate path for transmission, thus preventing The data is repeatedly received to form a broadcast storm, and the alternate path can be enabled to achieve normal data transmission when the primary path fails, thereby improving the anti-fault capability of the Ethernet.

FIG. 1 is a schematic structural diagram of an Ethernet ring network formed by a switching node. As shown in FIG. 1 , nodes A to F are switching nodes having an Ethernet switching function, such as a network device such as a switch, and the network M is connected to the node B, and the network N is connected to node D. When there is communication between network M and network N, there are two physical paths, namely network N<-> node D<-> node C<-> node B<-> network M, network N <-> Node D<-> Node E<-> Node F<-> Node A<-> Node B<-> Network M.

When the Ethernet ring protection technology is applied, the ring protection link and the control node are generally defined. That is, when the Ethernet ring network is fault-free, the link on the Ethernet ring that blocks data packets to prevent loop formation is The ring protection link can be used to switch between the primary path and the alternate path of the ring network by operating the ring protection link. A node that has a ring protection link is called a control node (or a master node). 2 is a schematic structural diagram of a control node and a protection link in an Ethernet ring network. As shown in FIG. 2, the links included in the Ethernet ring network include <A, B>, <B, C>, <C, D>, <D, E>, <E, F>, and <F, A>, the e-port of node A is blocked, A is the control node, and the e-port is directly connected to node A. , A> is the ring protection link. When the link on the ring is intact, the control node blocks the data packet forwarding function of the port connected to the ring protection link. No loop occurs in the network to prevent the "broadcast storm" caused by the network loop. Since the control node A blocks the data forwarding function of the e port, the data communication path of the network M and N is: network M<-> node B<-> node C<-> node D< A> Network N.

3 is a schematic structural diagram of a link failure in an Ethernet ring network. As shown in FIG. 3, when a link <: B, O fails, control node A releases the data packet forwarding function of port e, and networks M and N The new communication path is: network M<-> node B<-> node A<-> node F<-> node E<-> node D<-> network N, thus ensuring the communication of data services on the loop. In the Ethernet ring network, each node is connected to a large number of networks, which requires maintaining a large address forwarding table. When the network topology changes (such as link switching caused by a link failure), each node on the ring will refresh the address forwarding table, and all refreshes of the address forwarding tables of each node not only aggravate the address learning tasks of each node. Moreover, the scale of the broadcast storm on the Ethernet ring network has been greatly increased, which has caused great harm to network performance.

Summary of the invention

In view of this, the main purpose of the present invention is to provide an address refreshing method and a switching node of a switching node port in an Ethernet ring network, which can greatly reduce the capability of broadcasting between the switching nodes due to address learning when the network topology changes. Text.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

An address refreshing method for a switch node port in an Ethernet ring network, including:

When the Ethernet ring link is blocked, the two switching nodes at both ends of the blocking link periodically send address refresh messages in a direction away from the blocked link, where the address refresh message includes the MAC of the specific switching node. An address list, where the specific switching node is a switching node that includes the MAC address information in the address forwarding table learned by the port connected to the blocked link of the switching node that generates the address refresh message, in the special VLAN. The special VLAN is a data VLAN that communicates through data packets between switching nodes in the Ethernet ring network;

After receiving the address refresh message, the switching node determines whether its own MAC address exists in the MAC address list of the specific switching node, and deletes all the ports associated with the port that receives the address refresh message when not present. Address forwarding entry.

Preferably, the method further includes: the switching node in the Ethernet ring network periodically sends a broadcast data packet on the special VLAN, and the sending period is smaller than the Ethernet ring link. MAC address aging period.

Preferably, the method further includes:

When the switching node judges that its own MAC address exists in the MAC address list of the specific switching node, it does not perform any processing, or deletes all address forwarding entries associated with the port that forwards the address refresh message.

Preferably, the method further includes: before the step of sending the address refresh message by the two switching nodes at the two ends of the blocking link:

The two switching nodes at both ends of the blocking link generate an address refresh message, and after generating the address refresh message, delete all address forwarding entries associated with the port connecting the blocked link.

When the link in the Ethernet ring network is restored by the blocking, the control switching node periodically sends an address refresh message through the two ports of the switch, and the address refresh message includes a MAC address list of the specific switching node. The specific switching node is a switching node that includes the MAC address of the address forwarding table learned by the other ring on the special VLAN except the address refreshing packet; wherein the special VLAN is an Ethernet ring. a data VLAN that communicates between data exchanges between switching nodes in the network;

After receiving the address refresh message, the switching node determines whether the MAC address of the switch node exists in the MAC address list of the specific switching node, and deletes the port of the switching node and the address refresh message when not present. All associated address forwarding entries.

Preferably, the method further includes: the switching node in the Ethernet ring network periodically sends a broadcast data packet on the special VLAN, and the sending period is shorter than the MAC address aging period in the ring network link. .

Preferably, the method further includes:

When the switching node determines that its own MAC address exists in the MAC address list of the specific switching node, it does not perform any processing, or deletes all address forwarding entries of the switching node associated with the port that forwards the address refresh message. .

Preferably, the method is before the step of the control switching node sending an address refresh message, Also includes:

The control switching node generates an address refresh message, and after generating the address refresh message, deletes all address forwarding entries associated with the two ports of the control switching node.

A switching node in an Ethernet ring network, including at least:

a first generating unit, configured to generate an address refresh message for the two switching nodes at both ends of the blocking link when the Ethernet ring link is blocked, where the address refresh message includes a MAC address list of the specific switching node, The specific switching node is a switching node that includes MAC address information in the address forwarding table learned by the port that the switching node that generates the address refresh packet and the blocked link learns on the special VLAN, the special VLAN a data VLAN that communicates through data packets between switching nodes in the Ethernet ring network;

a first sending unit, configured to periodically send the address refresh text generated by the first generating unit in a direction away from the blocking link;

a receiving unit, configured to receive an address refresh message sent by another switching node;

a determining unit, configured to determine whether the MAC address of the switching node itself exists in a MAC address list of a specific switching node in the address refresh message received by the receiving unit, and trigger the deleting unit when not present;

A delete unit is configured to delete all address forwarding entries associated with the port used by the receiving unit to receive the address refresh message.

Preferably, when the switching node is a control switching node, the method further includes:

a second generating unit, configured to generate an address refresh message when the link in the Ethernet ring network is restored by the blocking, where the address refresh message includes a MAC address list of the specific switching node, where the specific exchange is performed. The node is a switching node that includes a MAC address in the address forwarding table learned by the port other than the address refresh packet sent by the port other than the address refresh packet in the two ports of the control switching node;

And a second sending unit, configured to periodically send, by the two ports of the control switching node, an address refresh message generated by the second generating unit.

When the link in the Ethernet ring network is blocked, the address refreshing packet generated by the switching node at both ends of the link is blocked and sent, and the address refreshing packet includes the switching node that generates the address refresh packet. The MAC address of the switching node included in the address forwarding table learned by the other port except the sending port on the special virtual local area network (VLAN). After receiving the address forwarding table, the other switching nodes judge Whether the MAC address of the switch is in the MAC address list of the switch node that is carried in the address refresh packet. If it does not exist, delete all the address forwarding entries associated with the port that receives the address refresh packet. If not, the device does not process the packet. All address forwarding entries associated with ports other than the port receiving the address refresh message in the two ports of the switching node of the address refresh message. In this way, when the network topology of the Ethernet ring network changes, it is not necessary to delete the address forwarding entry of the switching node port, and only the address forwarding entry of the failed port can be deleted. In theory, the address forwarding of all the switching node ports is deleted. Compared with the entry, the message broadcasted by the address learning is reduced by half, which greatly reduces the burden caused by the address learning in the Ethernet ring network, improves the efficiency of the exchange node address learning, and updates the address in the Ethernet ring network. The efficiency is greatly improved.

BRIEF abstract

1 is a schematic structural diagram of an Ethernet ring network formed by a switching node;

2 is a schematic structural diagram of a control node and a protection link in an Ethernet ring network;

3 is a schematic structural diagram of a link failure in an Ethernet ring network;

4 is a flow chart of an address refreshing method of a switching node port in an Ethernet ring network according to the present invention;

FIG. 5a is a schematic diagram of an application of an Ethernet ring network illustrating the method of FIG. 4; FIG.

FIG. 5b is another schematic diagram of an application of the Ethernet ring network illustrating the method of FIG. 4;

6 is a flow chart of an address refreshing method of a switching node port in another Ethernet ring network according to the present invention;

FIG. 7 is a schematic structural diagram of a <C, D> link in an Ethernet ring network being restored by blocking; FIG. 8 is a schematic structural diagram of a switching node in an Ethernet ring network according to the present invention;

FIG. 9 is a schematic structural diagram of a control switching node in an Ethernet ring network according to the present invention. Preferred embodiment of the invention

The basic idea of the present invention is: When the link in the Ethernet ring network is blocked, the switching nodes at both ends of the blocking link generate an address refresh message and send the address refresh message including the switching node that generates the address refresh message. The other port of the two ports except the sending port reads the MAC address of the switching node included in the address forwarding table learned on the special virtual local area network. After receiving the address forwarding table, the other switching nodes determine whether their own MAC address exists. If the MAC address list of the switching node carried in the address-refresh message does not exist, all the address forwarding entries associated with the port that receives the address-refresh message are deleted. If not, the switch does not process the packet. All address forwarding entries associated with ports other than the port that receives the address refresh. In this way, when the network topology of the Ethernet ring network changes, it is not necessary to delete the address forwarding entry of the switching node port, and only the address forwarding entry of the failed port can be deleted. In theory, the address forwarding of all the switching node ports is deleted. Compared with the entry, the message broadcasted by the address learning is reduced by half, which greatly reduces the burden caused by the address learning in the Ethernet ring network, improves the efficiency of the exchange node address learning, and updates the address in the Ethernet ring network. The efficiency is greatly improved.

In order to make the objects, the technical solutions and the advantages of the present invention more comprehensible, the present invention will be described in detail below with reference to the accompanying drawings.

4 is a flow chart of a method for refreshing an address of a switch node in an Ethernet ring network according to the present invention. As shown in FIG. 4, the method for refreshing an address of a switch node in an Ethernet ring network according to the present invention includes the following steps:

Step 401: When the Ethernet ring link is blocked, the two switching nodes at both ends of the blocking link periodically send address refresh messages in a direction away from the blocked link, where the address refresh message includes a specific exchange. a MAC address list of the node, where the specific switching node includes the MAC address information in the address forwarding table learned by the port connected to the blocked link of the switching node that generates the address refresh message on the special VLAN. Switch node. The special VLAN is a data VLAN that communicates between the switching nodes in the Ethernet ring network through data packets.

Link blocking in the present invention, including link failure and human blocking (data packet is blocked), link failure such as any port failure at both ends of the link or connected line failure (control messages and data packets are not available) Through the link).

In the present invention, the switching node in the Ethernet ring network is periodically sent on the special VLAN. A broadcast data packet is sent, and the period of sending is smaller than the MAC address aging period in the ring network link to ensure the effectiveness of the MAC address list on the switching node in the Ethernet ring network.

As shown in Figure 3, when the link <: B, C> is faulty or blocked by humans (data packets cannot pass, the control packet is not blocked), the switching node B generates an address refresh packet to generate an address refresh packet. The MAC address forwarding table learned by the w port of the switching node B before the <: B, C> fault or the data packet is blocked is inserted into the address refresh packet generated by the switching node B, where A special VLAN refers to a data VLAN in which an exchange node in an Ethernet ring network (only a switching node in a loop, in this example, A, B, C, D, E, F) communicates through data packets; The content of the MAC address list of the switching node carried in the address refresh packet is learned from the special VLAN by the node that sends the address refresh message. In the case that the e port of the switching node A is disconnected, the address forwarding table learned by the w port of the switching node B in the special VLAN includes the MAC address information of the switching nodes C, D, E, and F, that is, the switching node. When C, D, E, and F perform data communication with the switching node B, the switching node B learns the MAC addresses of the switching nodes C, D, E, and F through the data message. The address refresh message generated by the switching node B includes the MAC address information of the switching nodes C, D, E, and F. Similarly, the address refresh message generated by the switching node C includes the e port of the switching node C. MAC address information of switching nodes A and B in the address forwarding table. After the address refresh message is generated, the switching node B sends the address refresh message through the e port, and the switching node C sends the address refresh message through the w port.

After the address refresh packet is generated, the two switching nodes at both ends of the blocked link or the data packet blocking link delete all address forwarding entries associated with the port connecting the faulty link or the data packet blocking link. In Figure 3, the switching nodes: 8, C delete all the address forwarding entries associated with the w port of switching node B and the e port of switching node C, respectively.

Step 402: After receiving the address refresh message, the switching node determines whether its own MAC address exists in the MAC address list of the specific switching node, and deletes and receives the port of the address refresh message when not present. All associated address forwarding entries.

Still taking FIG. 3 as an example, after receiving the address refresh message sent by the switching node B through the e port, the switching node A parses out the MAC address list of the specific switching node therein, and determines whether the MAC address of the switching node A exists in the specific In the MAC address list of the switching node, since only the MAC address of the switching node C, D, E, F is included in the MAC address list of the specific switching node Information, so the MAC address of the switching node A itself does not exist in the MAC address list of the specific switching node carried in the address refresh message. Therefore, the switching node A deletes the port w associated with receiving the address refresh message. For all address forwarding entries, the port w of switching node A will no longer have any address forwarding table. By the same token, the specific MAC address list carried by the address refresh message received by the switching nodes C, D, E, and F includes the MAC address information of the switching nodes A and B, and therefore, the address refresh report is received. All address forwarding entries associated with port e in the switching nodes C, D, E, F of the text will all be deleted.

It should be noted that, in the case that the link is not disconnected, for example, the port e on the control switching node A blocks the data packet on the Ethernet ring network, but belongs to the logical blocking, and the link <F, A> < A, The physical connection of the F> is not broken, and the link <F, A> or <A, F> does not block the control packet of the switching node on the Ethernet ring network. Therefore, the address refreshed by the switching node B through the e port is still refreshed. It can be received by the switching nodes C, D, E, and F. Similarly, the address refresh message sent by the switching node C through the w port can still be received by the switching nodes A and B. After the switching node 〇, D, E, and F receive the address refreshed by the switching node B through the e port, the MAC address is stored in the MAC address list of the specific switching node carried by the address refresh packet. Therefore, the address forwarding table of the w port that receives the address refresh message will not be deleted. Similarly, after receiving the address refresh message sent by the switching node C, the switching nodes A and B will not delete the switching node and B. All address forwarding entries associated with the e port.

In order to make the port address of the switching node of the present invention refresh more thoroughly, the switching nodes C, D, E, and F can also receive the address refreshing packet sent by the switching node B through the e port, and then delete and exchange the sections C and D respectively. E. All address forwarding entries associated with the e port of F. Similarly, the switching node, B receives the address refresh message sent by the switching node C through the w port, and deletes all addresses associated with the w port of the switching node A. Forward the entry.

The essence of the method of Fig. 4 is further clarified below with reference to examples.

FIG. 5a is a schematic diagram of an application of the Ethernet ring network of the method of FIG. 4, and FIG. 5b is another schematic diagram of an application of the Ethernet ring network of the method of FIG. 4. As shown in FIG. 5a, the switching node included in the Ethernet ring network has A. , B, C, D, E, and F, including links <A, B>, <B, C>, <C, D>, <D, E>, <E, F>, and <F, A >link. The switching node A is a control node, and the link <F, A> directly connected to the e port of the switching node A is a ring protection link, and the e of the switching node A The port blocks the forwarding of data packets under normal conditions.

As shown in Figure 5b, the link (〇, D) of the Ethernet ring network is faulty or the data packet is blocked. The switching node C generates an address refresh packet. The address refresh packet can be reported by the fault alarm (SF). The text is implemented by adding a MAC address list of a specific switching node to the SF packet, and carrying the address refreshing indication information, where the specific switching node is the address learned by the w port in the Ethernet ring in the special VLAN. The switching node including its MAC address information in the forwarding list is the switching node 0, E, F. After the SF packet is generated, the switching node C refreshes the MAC address associated with the w port of the switching node C, and deletes all the address forwarding entries associated with the w port of the switching node C, and then periodically sends the SF packet along the e port ( Recorded as SF1 message). At the same time, the switching node D generates the SF2 packet, and the SF2 packet includes the MAC address list of the switching node included in the address forwarding table learned by the e port of the switching node D in the special VLAN, that is, the switching nodes A, B, and C. MAC address information. After the LSP 2 is generated, the switching node D refreshes the MAC address associated with the e port of the switching node D, and deletes all the address forwarding entries associated with the e port of the switching node D, and then periodically sends the SF2 message along the w port.

Those skilled in the art should understand that adding a specific switching node to the SF message is added.

The MAC address list and the address refreshing indication information are easy to implement, and the corresponding indicator bits may be added to the existing SF message, and the indicator bits may be added in the SF text (for example, by agreement) to each switching node. Or pre-arrange the format of the SF message.

After receiving the SF1 or SF2 packet, the switching node on the ring confirms that the address needs to be refreshed. If the MAC address of the switching node does not exist in the MAC address list of the specific switching node carried in the SF, the switching node refreshes and receives the packet. An address forwarding table of a port of an SF1 or SF2 packet, that is, deleting all address forwarding entries associated with the port; if present in a MAC address list of a specific switching node carried in the SF, the switching node does not refresh the corresponding port Address forwarding table.

FIG. 6 is a flow chart of a method for refreshing an address of a switch node in an Ethernet ring network according to the present invention. As shown in FIG. 6, the method for refreshing an address of a switch node in an Ethernet ring network according to the present invention includes the following steps:

Step 601: When the link in the Ethernet ring network is restored by the blocking, the control switching node periodically sends an address refresh message through the two ports of the Ethernet ring, and the address refresh message includes a MAC address list of the specific switching node. The specific switching node sends the address brush for the Another ring port other than the new message learns the address forwarding table on the special VLAN and includes the switching node of its MAC address. The special VLAN is a data VLAN that communicates between the switching nodes in the Ethernet ring network through data packets.

In the present invention, the switching node in the Ethernet ring network periodically sends broadcast data packets on the special VLAN, and the sending period is shorter than the MAC address aging period in the ring network link to ensure the Ethernet ring network. The effectiveness of the list of MAC addresses on the switching node.

FIG. 7 is a schematic structural diagram of the <C, D> link in the Ethernet ring network being restored to normal by blocking. As shown in FIG. 7, when the link failure is restored or the data packet is restored by the blocking, the control switching node A generates two. Address refresh packet, an address refresh packet is extracted from the w port of the switching node A. The MAC address learned on the special VLAN before the < C, D > recovery from the fault to normal includes the MAC of other switching nodes in the Ethernet ring network. Address, the MAC address information of the other switching nodes that are extracted is inserted into the address refresh message, and the address refresh message is sent through the e port; the MAC address of the other switching node inserted in the address refresh message is Switching the MAC address information of the D, E, and F of the node; Similarly, the other address refresh message generated by the control switching node A is inserted into the e port of the switching node A before the <C, D> is restored from the fault to normal. The MAC address learned on the special VLAN includes the MAC address of the switching node B and C. The address is refreshed and sent out through the w port of the switching node A.

After the address refresh message is generated, the control switching node deletes all address forwarding entries associated with the two ports of the control switching node. In FIG. 7, the control switching node A deletes all address forwarding associated with the w port and the e port. entry.

Step 602: After receiving the address refresh message, the switching node determines whether its own MAC address exists in the MAC address list of the specific switching node, and deletes the port associated with receiving the address refresh message when not present. Forward all entries for the address.

This step is exactly the same as that of step 402, and details are not described herein again.

The essence of the method of Fig. 6 is further clarified below with reference to examples.

When the fault recovery of the link <C, D> of the Ethernet ring network or the data packet is restored by the blocking, the switching node C periodically sends out the unsolicited message (NR) message along its two ports. The switching node D periodically sends an NR message along its two ports. After receiving the NR message sent by the switching node C, the switching node D compares the priorities between the two switching nodes. If the priority of the switch node C is high, the switching node D can open the forwarding function of the data packet of the e port and stop transmitting the NR message. The switching node A receives the NR message sent by the switching node C or the switching node D for the first time, and starts a timer. After the timer expires, the switching node A generates the foregoing address refresh message, and the purpose of setting the timer is to prevent the exchange. When the connection between the nodes C and D is restored, the unstable state occurs. As a result, the control node keeps blocking or opening the e-port data packet, thus ensuring the stability of the Ethernet ring link. Here, the control node A uses an NR (RB) message (indicating that the ring protection link block (RB) is blocked) as an address refresh message, that is, adding a specific switching node to the NR (RB) message. A list of MAC addresses, and carries an indication of address refresh. The switching node A has to generate two NR (RB) messages. As described in the foregoing step 601, the MAC address information of the D, E, and F of the switching node is inserted into the two NR (RB) messages, respectively. , C's MAC address information. After generating the NR (RB) message, control switching node A blocks the e port (data packet is blocked), deletes all address forwarding entries associated with its e port, and periodically sends NR out along the e port ( RB) 1 message (address refresh message inserted into the MAC address information of the B and C of the switching node), periodically transmitting NR (RB) 2 messages along the w port (inserted with switching nodes D, E, F) The address of the MAC address information is refreshed, and the other switching node ring protection links on the Ethernet ring are notified that the data packet has been blocked.

It should be understood by those skilled in the art that it is easy to add the MAC address information of the specific switching node and the indication information of the address refresh in the NR (RB) message, and add corresponding in the existing NR (RB) message. The indicator bit can be used, and the NR (RB) message can be added with an indication bit (for example, by agreement) to each switching node, or the format of the NR (RB) message can be agreed in advance.

After receiving the NR ( RB ) 1 or NR ( RB ) 2 message, the switching node on the Ethernet ring network determines that it carries the address refreshing indication information, and performs port address refreshing, that is, if the MAC address of the switching node exists. In the MAC address list of the specific switching node carried in the NR (RB) message, the switching node deletes all address forwarding entries associated with receiving the NR (RB) message port; if not present in the NR (RB) report In the MAC address list of the specific switching node carried in the file, the switching node does not refresh the address forwarding table of the port; or, in order to make the port address of the switching node of the present invention refresh more thoroughly, the switching node D, E, F can also be received. Go to switch node A through e After the NR (RB) packet sent by the port, all address forwarding entries associated with the e ports of the switching nodes D, E, and F are deleted, respectively. Similarly, the switching node: 8, C receives the switching node A and sends it through the w port. After the NR (RB) message, all address forwarding entries associated with the switch port: 8, C's w port are deleted.

8 is a schematic structural diagram of a switching node in an Ethernet ring network according to the present invention. As shown in FIG. 8, the switching node in the Ethernet ring network of the present invention includes a first generating unit 80, a first transmitting unit 81, a receiving unit 82, and a determining unit 83. And the deleting unit 84, wherein the first generating unit 80 is configured to generate an address refresh message for each of the two switching nodes at both ends of the link when the Ethernet ring link is blocked, where the address refresh message includes a specific a MAC address list of the switching node, where the specific switching node includes the MAC address information in the address forwarding table learned by the port connected to the blocked link of the switching node that generates the address refresh message on the special VLAN. Switching node. Here, the link is blocked, including the link fault and being blocked by the user (the data packet is blocked). The link fault, such as any port fault at both ends of the link (control packets and data packets cannot pass through the link). ) or the connection line is faulty. The first sending unit 81 is configured to periodically send the address refresh generated by the first generating unit in a direction away from the blocking link. The receiving unit 82 is configured to receive an address refresh message sent by another switching node. The determining unit 83 is configured to determine whether the MAC address of the switching node itself exists in the MAC address list of the specific switching node in the address refresh message received by the receiving unit 82, and triggers the deleting unit 84 when not present. The delete unit 84 is configured to delete all address forwarding entries associated with the port used by the receiving unit 82 to receive the address refresh message.

9 is a schematic structural diagram of a control switching node in an Ethernet ring network according to the present invention. As shown in FIG. 9, when the switching node is a control switching node, the second generating unit 85 and the second sending unit 86 are further included. The generating unit 85 is configured to generate an address refresh file when the data packet in the link in the Ethernet ring network is restored by the blocking, where the address refresh message includes a MAC address list of the specific switching node, where the specific exchange is performed. The node is a switching node whose MAC address is included in the address forwarding table learned by the port other than the address refresh packet sent by the port in the two ports. The second sending unit 86 is configured to periodically send the address refresh generated by the second generating unit 85 through the two ports of the control switching node.

When the receiving unit 82 determines that the MAC address of the switching node to which it belongs exists in the MAC address list of the specific switching node, the receiving unit 82 does not perform any processing, or triggers the deleting unit 84 to delete and transfer. All address forwarding entries associated with the port that sent the address refresh message. After the address refresh message is generated, the delete unit 84 of the control switching node deletes all address forwarding entries associated with the two ports of the control switching node.

It should be understood by those skilled in the art that the switching node in the Ethernet ring network of the present invention is designed for application to the switching node in the Ethernet ring network shown in FIG. 4 to FIG. 7, and each of the devices shown in FIG. 8 and FIG. The implementation functions of the processing unit can be understood with reference to the related description in the methods shown in FIGS. 4 to 7. The functions of the units in the switching node in the Ethernet ring network of the present invention can be realized by a program running on the processor, or can be realized by a specific logic circuit.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

INDUSTRIAL APPLICABILITY An address refreshing method and system for a switching node port in an Ethernet ring network disclosed in the present invention, so that when the network topology changes, it is not necessary to delete all the address forwarding entries of the switching node port, and only the address forwarding of the failed port is deleted. The entry is OK. In theory, the number of messages broadcasted by address learning is reduced by half compared to the address forwarding entries of all the switching node ports, which greatly reduces the burden of address learning in the Ethernet ring network. The efficiency of the exchange node address learning is improved, and the address update efficiency in the Ethernet ring network is greatly improved.

Claims

Claim

1. An address refreshing method for a switch node port in an Ethernet ring network, including:

When the Ethernet ring link is blocked, the two switching nodes at both ends of the blocking link periodically send address refresh messages in a direction away from the blocked link, where the address refresh message includes the MAC of the specific switching node. An address list, where the specific switching node includes the MAC address information exchanged in the address forwarding table learned by the port connected to the blocked link of the switching node that generates the address refresh message on the special virtual local area network VLAN. a node, the special VLAN is a data VLAN that communicates through data packets between switching nodes in an Ethernet ring network;

After receiving the address refresh message, the switching node determines whether its own MAC address exists in the MAC address list of the specific switching node, and deletes the switching node and receives the address refresh message when not present. All address forwarding entries associated with the port.

The method according to claim 1, the method further includes: the switching node in the Ethernet ring network periodically sends a broadcast data packet on the special VLAN, and the sending period is less than the Ethernet MAC address aging period in the ring link.

3. The method of claim 1, further comprising:

When the switching node determines that its own MAC address exists in the MAC address list of the specific switching node, it does not perform any processing, or deletes all address forwarding entries associated with the port that forwards the address refresh message.

The method of claim 1, before the step of sending the address refresh message by the two switching nodes at the two ends of the blocking link, the method further includes:

5. An address refreshing method for a switch node port in an Ethernet ring network, including:

When the link in the Ethernet ring network is restored by the blocking, the control switching node periodically sends an address refresh message through the two ports of the switch, and the address refresh message includes a MAC address list of the specific switching node. The specific switching node includes the MAC address of the address forwarding table learned by the port other than the address refresh packet sent by the port in the special port. a switching node; wherein the special VLAN is a data VLAN that communicates between data switching packets between switching nodes in an Ethernet ring network;

The method according to claim 5, the method further includes: the switching node in the Ethernet ring network periodically sends a broadcast data packet on the special VLAN, and the sending period is smaller than the ring. MAC address aging period in the network link.

7. The method of claim 5, the method further comprising:

When the switching node determines that its own MAC address exists in the MAC address list of the specific switching node, it does not perform any processing, or deletes all addresses associated with the port of the switching node that forwards the address refresh message. Forward the entry.

The method according to claim 5, before the step of the control switching node sending the address refresh message, the method further includes:

9. A switching node in an Ethernet ring network, the switching node comprising:

a first sending unit, configured to periodically send the address refresh message generated by the first generating unit in a direction away from the blocked link;

a receiving unit, configured to receive an address refresh message sent by the switching node other than the switching node in the Ethernet ring network;

a determining unit, configured to determine whether the MAC address of the switching node itself exists in the Deleting the deletion unit when the MAC address list of the specific switching node in the address refresh message received by the receiving unit does not exist;

10. The switching node according to claim 9, wherein the switching node further includes: