WO2015106680A1

WO2015106680A1 - Stacking implementation method and stackable device

Info

Publication number: WO2015106680A1
Application number: PCT/CN2015/070663
Authority: WO
Inventors: 沈悦; 于斌; 叶言飞
Original assignee: 华为技术有限公司
Priority date: 2014-01-14
Filing date: 2015-01-14
Publication date: 2015-07-23
Also published as: CN103746944B; CN103746944A

Abstract

An embodiment of the present invention provides a stacking implementation method. The method comprises: a first device broadcasting a stacking enabled packet through a first port, the stacking enabled packet carrying information through which another device can establish a stacking relationship with the first device, the first device being a main device of a stacking system, the first port for broadcasting the stacking enabled packet being used as a stacking port of the first device, and the first port being located at the first device; the first device receiving a first stacking confirmation packet sent by a second device, the first stacking confirmation packet carrying a MAC address of the second device and information for using the second part as a stacking port oriented to the first device, of the second device, and the second port being located at the second device; and the first device switching the first port from a common service port to a stacking port, and recording the MAC address of the second device and a topological relationship between the first port and the second port. By using the foregoing embodiment, the switches can establish, by means of autonegotiation, a stacking system without manual configuration.

Description

Stack implementation method and stackable device

The present application claims priority to Chinese Patent Application No. 201410015370.2, entitled "Stacking Implementation Method and Stackable Device", filed on January 14, 2014, the entire contents of which is incorporated herein by reference. .

Technical field

The present invention relates to the field of communications, and in particular, to a stack implementation method and a stackable device.

Background technique

Stacking refers to combining more than one switch to work together to provide as many ports as possible in a limited space. Multiple switches are stacked to form a stacking system, and connected devices outside the stacking system form a stacking system. A switch is a switch. One of the multiple switches that make up the stack system serves as the master device and is responsible for the management of the entire stack system.

Generally, there are several implementations of the stacking system. For example, a dedicated stacking port is provided on the switch, and the stacking port is only used for information transmission in the stacking system, such as consistency information between switches and real-time synchronization data. You cannot forward traffic to an external device as a normal service port. However, in this way, there is a waste of the port of the switching device. Another type of stack is implemented as a port. This means that a common service port can also be used as a stack port. You can specify a port as a common service port or stack port by specifying the role of the port. waste. In this mode, you need to manually specify the role of the connected port between the stacking devices. When the number of stacking devices is large, the workload of the staff is large, which may cause misconfiguration and affect the operation of the stacking system.

Summary of the invention

It is an object of the present invention to provide a stack implementation method to implement a stacking system for multiple switch devices without manual configuration.

To achieve the above object, the present invention provides a method for implementing a stack, the method comprising:

The first device broadcasts the first stack enable message in the Ethernet format by using the first port, the source address of the first stack enable message is the MAC address of the first device, and the first stack enable report The device carries the information that the other device can establish a stack relationship with the first device, where the first device is the master device of the stacking system to be established, and the first port is located in the first device;

The first device receives the first stack acknowledgment message in the Ethernet format sent by the second device, where the destination address of the first stack acknowledgment message is the MAC address of the first device, and the source address is the second a MAC address of the device, where the second port is used as the information about the stack port of the second device, and the second port is located in the second device;

The first device switches the first port from a normal service port to a stack port, and records a MAC address of the second device and a topological relationship between the first port and the second port.

In a first possible implementation manner of the first aspect, the first device switches the first port from a normal service port to a stack port, and records a MAC address and a location of the second device. The topological relationship between the first port and the second port, and then includes:

Sending, by the first port, a second stack enable message in a stack format to the second device;

Receiving, by the first port, a second stack acknowledgment message in a stack format sent by the second device, where the second stack acknowledgment message carries a MAC address of the second device and the third device, and the third port is As the information of the stack port facing the third device, and the information that the fourth port is the stack port of the third device facing the second device, the fourth port is located in the third device, The third port is located in the second device;

The first device records a MAC address of the third device, and a topological relationship between the fourth port and the third port.

In a second aspect, an embodiment of the present invention provides a method for implementing a stack, where the method includes:

Receiving, by the second device, the first stack enable message in the Ethernet format broadcasted by the first device by using the second port, where the source address of the first stack enable message is the MAC address of the first device, where the A stack-enabled packet carries information that another device can establish a stack relationship with the first device, where the first device is a master device of a stacking system to be established;

The second device records the MAC address of the first device;

The second device sends a first stack acknowledgement packet in an Ethernet format to the first device by using the second port, where the destination address is the MAC address of the first device, and the source address is the MAC address of the second device. An address, the first stack confirmation message carrying the second port as the information of the second device facing the stack port of the first device, and the second port is located in the second device;

Switching the second port from a normal service port to a stack port.

According to the second aspect, in a first possible implementation manner of the second aspect, the the second port is switched from a normal service port to a stack port, and a stacking relationship with the first device is established, and then, include:

Receiving, by the second device, the second stack enable message in the stack format sent by the first device by using the second port;

The second device converts the second stack enable message into a third stack enable message in an Ethernet format;

The second device sends the third stack enable message in an Ethernet format to the third device by using the third port, where the third port is located in the second device;

And receiving, by the third device, a third stack acknowledgment message in an Ethernet format sent by the fourth port, where the fourth port is located in the third device, and the destination address of the third stack acknowledgment message is the a MAC address of the second device, where the source address of the third stack acknowledgment message is the third device, and the information of the fourth port is used as a stack port facing the second device;

The second device converts the third stack acknowledgment message into a second stack acknowledgment message in a stack format, where the second stack acknowledgment message carries the MAC address of the second device and the third device, The third port is used as the information of the second device facing the stack port of the third device, and the fourth port is used as the information of the third device facing the stack port of the second device, the fourth port Located in the third device, the third port is located in the second device;

Switching the third port from a normal service port to a stack port;

Sending, by the second port, the second stack acknowledgement message to the first device.

Based on the second aspect, in a second possible implementation manner of the second aspect, after establishing a stacking relationship with the first device, the method further includes:

Receiving a stack-disabled packet in a stack format that is broadcast by the first device, where the stack-disabled packet carries a MAC address of the first device, and is used to notify the non-master device of the stacking system to cancel the stacking system;

Deleting information saved by the second device;

Sending, by the second device, the stack format of the stack format to the first device to enable the acknowledgement message;

Converting the second port from a stack port to a normal service port.

Based on the second possible implementation of the second aspect, in a third possible implementation manner of the second aspect, the converting the second port from the stack port to the normal service port, and then:

Forwarding, by the third port, the stack-disabled packet in the stack format to the third device, to release the stacking relationship with the third device;

After receiving the stack-disabled acknowledgement packet in the stack format sent by the third device, the third port is converted into a normal service port.

In a third aspect, an embodiment of the present invention provides a stackable device, where the stackable device includes:

a sending unit, configured to broadcast, by using the first port, a first stack-enabled packet in an Ethernet format, where a source address of the first stack-enabled packet is a MAC address of the local device, where the first stack is configured Can carry other equipment in the message. The first device is located at the local device, where the local device is the master device of the stacking system to be established.

a receiving unit, configured to receive a first stack acknowledgment message in an Ethernet format sent by the second device, where a destination address of the first stack acknowledgment message is a MAC address of the local device, and a source address is the second a MAC address of the device, where the second port is used as the information about the stack port of the local device, and the second port is located in the second device;

a switching unit, configured to switch the first port from a normal service port to a stack port;

a storage unit, configured to record a MAC address of the second device and a topological relationship between the first port and the second port.

Based on the third aspect, in a first possible implementation manner of the third aspect,

The sending unit is further configured to: send, by using the first port, a second stack enable message in a stack format to the second device;

The receiving unit is further configured to: receive, by using the first port, a second stack acknowledgment message in a stack format sent by the second device, where the second stack acknowledgment message carries a MAC address of the second device and the third device, The third port is located as information facing a stack port of the third device, and the fourth port is used as information of the third device facing a stack port of the second device, where the fourth port is located The third device, the third port is located in the second device;

The storage unit is further configured to: record a MAC address of the third device, and a topological relationship between the fourth port and the third port.

In a fourth aspect, the embodiment of the present invention further provides a stackable device, where the stackable device includes:

a first receiving unit, configured to receive, by using the second port, the first stack enable message in an Ethernet format broadcast by the first device, where the source address of the first stack enable message is the first device MAC address, the first stack enable message carries information that another device can establish a stack relationship with the first device, and the first device is a master device of the stack system to be established;

a storage unit, configured to record, by the local device, a MAC address of the first device;

a first sending unit, configured to send, by using the second port, the first stack acknowledgement packet in an Ethernet format to the first device, where the destination address of the first stack acknowledgement packet is the first The MAC address of the device, the source address is the MAC address of the second device, and the first stack acknowledgment message carries the second port as the information of the stack port of the second device facing the first device. The second port is located at the local device;

And a creating unit, configured to switch the second port from a normal service port to a stack port.

According to the fourth aspect, in a first possible implementation manner of the fourth aspect, the first receiving unit is further configured to: receive, by using the second port, a second stack enable message in a stack format sent by the first device, Translating the second stack enable message into a third stack enable message in an Ethernet format;

The stacking device further includes:

a second sending unit, configured to send, by using the third port, the third stack enable message in an Ethernet format to the third device, where the third port is located in the second device;

a second receiving unit, configured to receive a third stack acknowledgment message in an Ethernet format sent by the third device by using the fourth port, where the fourth port is located in the third device, and the third stack acknowledges the packet The destination address is the MAC address of the second device, and the source address of the third stack acknowledgment packet is the third device, and the fourth port is configured as a stack port facing the local device. information;

a generating unit, configured to encapsulate, by the local device, the third stack acknowledgment message into a second stack acknowledgment message in a stack format, where the second stack acknowledgment message carries the local device and the third device a MAC address, the information of the third port being the stack port of the local device, and the fourth port being the information of the third device facing the stack port of the local device, The fourth port is located in the third device, and the third port is located in the local device;

a switching unit, configured to switch the third port from a normal service port to a stack port;

And a third sending unit, configured to send the second stack confirmation packet to the first device by using the second port, to establish a stacking relationship between the local device and the third device.

According to a first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, the device further includes:

a fourth receiving unit, configured to receive a stack-disabled packet in a stack format that is broadcast by the first device, where the stack-disabled packet carries a MAC address of the first device, and is used to notify a non-master of the stacking system The device is unstacked;

The storage unit is further configured to delete the information saved by the local device;

a fourth sending unit, configured to send, by the local device, the stack format of the stack format to enable the acknowledgement packet to the first device by using the second port;

The switching unit converts the second port from a stack port to a normal service port.

According to a second possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the device further includes:

a fifth sending unit, configured to forward the stack de-enabled packet in a stack format to the third device by using the third port, to release a stacking relationship with the third device;

The interface conversion unit is configured to convert the third port into a common service port after receiving the stack deactivation confirmation message sent by the third device.

The stack implementation method provided by the present invention implements the functions of the different ports of the switch through the protocol packets, and implements different functions of the ports, and implements stack enable and stack disable. The switch can create a stack system through auto-negotiation without manual configuration.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the embodiments or the description of the prior art will be briefly described below. It is obvious that the drawings in the following description are only the present invention. For some embodiments, other drawings may be obtained from those of ordinary skill in the art in light of the inventive workability.

1 is a system architecture diagram of a stack system construction;

2 is a flowchart of an embodiment of a stack implementation method according to an embodiment of the present invention;

3 is an interaction diagram of another embodiment of a stack implementation method according to an embodiment of the present invention;

4 is an interaction diagram of still another embodiment of a stack implementation method according to an embodiment of the present invention;

FIG. 5 is a device state interaction diagram of a stack implementation method according to an embodiment of the present invention; FIG.

FIG. 6 is a structural diagram of an embodiment of a stackable device according to an embodiment of the present invention; FIG.

7 is a structural diagram of an embodiment of a stackable switch according to an embodiment of the present invention;

FIG. 8 is a structural diagram of an embodiment of a stackable device according to an embodiment of the present invention; FIG.

FIG. 9 is a structural diagram of an embodiment of a stackable switch according to an embodiment of the present invention.

detailed description

The technical solution of the present invention will be further described in detail below through the accompanying drawings and embodiments.

The stack implementation method provided by the embodiment of the present invention is used to construct a stacking system as shown in FIG. 1. The stacking system includes multiple switches, one of which is configured or designated as a master device, and the remaining switches are used as Non-master devices. Because the stacking system uses a linear (English: linear) connection, each non-master device has no more than two ports for the stack system. The port can be a physical port or a logical chain. Road aggregation (English: link aggregation) port. The first device in FIG. 1 is connected to the second port eth2 on the second device through the first port eth1, and the second device is connected to the fourth terminal on the third device through the third port eth3. Mouth eth4. In the embodiment of the present invention, the switch device in the stack system can automatically establish a stacking system in three different scenarios.

As shown in FIG. 2, the embodiment of the present invention provides a method for implementing a stack, which is applied to the master device in FIG. 1. For convenience of description, the master device is referred to as a first device, and the method includes:

201. The first device broadcasts a first stack enable message in an Ethernet format by using the first port.

Specifically, reference may be made to FIG. 3, which is a state interaction diagram of the first embodiment of the present invention. In this embodiment, several switching devices of the stacking system have established physical connections, and the first device has been Designated as the primary device in several switches that will be building a stacking system.

More specifically, the first stack-enabled packet is a broadcast packet sent by the master device, and the first stack enables the packet in the Ethernet format, the source address of which is the MAC address of the sender, and the first stack The destination address of the enabled packet is the broadcast address. The first stack enable message is used to notify other switches in several switches that are about to establish a stack system. The master device wants to establish a stack system with other switches.

In this embodiment, the source address of the first stack-enabled packet is the MAC address of the first device, and the first stack-enabled packet indicates that the first device wants to establish a stack relationship with the second device. The second device may establish a stack relationship with the first device according to the information that the first device wants to establish a stack relationship with the second device.

For example, in a period of 30 seconds, the first device sends a stack enable message every 1 second (English: second, symbol: s) from the first port Eth1 connected to the second device. If the first device does not receive the confirmation message within the set time, the stacking system is abandoned.

The second device has not yet established a stack relationship with the first device. After receiving the first stack enable packet in the Ethernet format, the second device records the MAC address of the first device carried in the first stack enable packet. The stack-enabled packet is discarded, and then the first stack acknowledgement packet is sent from the second port Eth2 of the second device to the first device.

Specifically, the first stack acknowledgment message is sent by the second device, and is used to respond to the packet of the stacking enable message of the first device. format. The destination address is the MAC address of the first device, and the source address is the MAC address of the second device. The first stack acknowledgement packet includes a MAC address of the device on the forwarding path of the first stack acknowledgement packet and a port identifier of the second port.

In this embodiment, the first stack acknowledgement packet carries the MAC address of the second device and the information that the second port is configured as a stack port, and after the second device sends the first stack acknowledgement packet, the second device The second device switches the state of the second port from the normal service port to the stack port.

After the second port is configured to switch the second port to the stack port, the second port needs to encapsulate the packet in the stack format. For example, the stack identifier field is added to the header of the Ethernet packet. Business The service packets sent by the port are differentiated. After that, the format of the stack acknowledgement packet that is continuously sent is also changed to the packet in the stack format.

202. The first device receives a first stack acknowledgement packet in an Ethernet format sent by the second device.

Specifically, the destination address of the first stack acknowledgment message is a MAC address of the first device, and the source address of the first stack acknowledgment message is a MAC address of the second device, the first stack The confirmation message carries the MAC address of the second device and the second port as the information of the second device facing the stack port of the first device.

203. The first device switches the state of the first port from the normal service port to the stack port, and records the MAC address of the second device and the topological relationship between the first port and the second port.

Specifically, after receiving the first stack acknowledgement packet, the first device switches the state of the first port from the normal service port to the stack port, and then the first device needs to encapsulate the packet sent by the stack port as A packet in the stack format, for example, adds a stack identifier field to the header of the Ethernet packet to distinguish it from the service packet sent by the common service port. After that, the format of the stack-enabled packet that is sent continuously is also changed to the packet in the stack format.

Specifically, the first port of the first device has been converted into a stack port, and the first device does not process the first stack acknowledgement packet in the stack packet format sent by the second device.

Further, after the first device and the second device have established the stacking relationship, the first device is still continuously sending the second stack enable message in the stack packet format, and the second device can still receive the second stack continuously. Enable the message. After the second device receives the second stack-enabled packet from the second port, the stack identifier field in the stack-enabled packet is removed from the stack-enabled packet. The third stack enable message is formed in the normal Ethernet packet format, and then the third stack enable message in the Ethernet packet format is forwarded to the third device through the third port Eth3.

Similar to the processing after the first device receives the first stack enable message, the third device records the MAC address of the first device, and sends a third stack acknowledgement packet in the Ethernet format to the fourth port Eth4. a second device, where the fourth port is located in the third device, the third stack acknowledgement packet carries a MAC address of the third device, and the fourth port is used as the second device Information about the stacking port. Thereafter, the third device switches the working state of the fourth port from the normal service port to the stack port.

After the third device is configured to switch the fourth port to the stack port, the first device needs to encapsulate the packet in the stack format for the packets sent through the stack port, for example, adding a stack identifier field to the header of the Ethernet packet, and The service packets sent by the service port are differentiated. Then, the format of the stack acknowledgement packet sent to the second device is also changed to the packet in the stack format.

The second device receives the third stack acknowledgement packet in the Ethernet format sent by the third device by using the fourth port, and then switches the third port from the normal service port to the stack port. And generating a second stack acknowledgment message in a stack format, where the second stack acknowledgment message carries a MAC address of the second device and the third device, and the third port is configured as the second device Information of a stack port of the third device, and information of the fourth port as a stack port of the third device facing the second device. Transmitting, by the second port, the second stack acknowledgment message to the first device, after receiving the second stack acknowledgment message, the first device records a MAC address of the third device, and the fourth The port is associated with the stack of the third port, and the second stack acknowledgement packet is also a packet in a stack format.

And so on, until all devices establish a stack relationship, and then stop sending any packets related to the establishment of the stack system.

The above embodiment is in a scenario where several switching devices of the stacking system have established a physical connection and the first device has been designated as the primary device of the stacking system. In another scenario, only the physical connection is established between the stacking devices, but the non-master device does not know whether the master device has been established. In this case, reference may be further made to FIG. 4, which is an interaction of another embodiment. Figure.

Before step 201, the method further includes:

Step 1: The first device receives a stack query message in an Ethernet format sent by the second device.

Specifically, the stack query message is sent by the non-master device to detect the existence of the master device. The packet is in the Ethernet packet format. The stack query message is a broadcast packet, and the source address is the MAC address of the device that sends the stack query message, and the destination address is broadcast. In this embodiment, the source address of the stack query message is the MAC address of the second device.

Step 2: The first device sends a stack response message in an Ethernet format to the second device, where the stack response message is used to notify the second device, where the first device is a master device of the stack system, and Agree to build a stacking system. After that, the first device is the same as the embodiment shown in FIG. 2, and will not be described again.

As shown in Figure 5, in another scenario, the established stacking system needs to be removed. At this time, the process of releasing the stacking system is as shown in Figure 5:

First, the first device broadcasts a stack-disabled packet in a stack format, and the stack-disabled packet carries a MAC address of the first device, and is used to notify the non-master device of the stack system to cancel the stacking system.

Then, the second device receives the stack de-enabled message broadcasted by the first device, and deletes the information saved by the second device. The second device sends a stack format-enabled acknowledgement packet to the first device by using the second port, and converts the second port into a common service port.

After receiving the stack deactivation confirmation message sent by the second device, the first device deletes the information saved by the first device, converts the first port into a common service port, and then stacks the first device and the second device. The relationship is lifted.

Similarly, the second device forwards the stack de-enabled message to the third device to release the stacking relationship between the third device and the second device. The second device may forward the stack de-enable message to the third device before or after sending the stack de-encryption acknowledgement message to the first device by using the second port, or may perform the two steps in parallel.

Through the foregoing embodiments, the switches of the stacking system are configured to negotiate the different ports of the switch through the protocol packets, and the different ports have different functions, and the stacking and stacking are disabled, so that the switches can be enabled. Create a stack system by auto-negotiation without manual configuration.

Correspondingly, as shown in FIG. 6 , an embodiment of the present invention further provides a stackable device. The embodiment may be, for example, a second device that is a non-master device of the stack system in FIG. 1 . The stacking device is called a local device, and the device includes:

The first receiving unit 601 is configured to receive, by the local device, a first stack enable message in an Ethernet format broadcast by the first device, where a source address of the first stack enable message is a MAC address of the first device The first stack-enabled packet carries information about a stacking relationship between the other devices in the switch that is about to establish the stacking system, and the first device is a master device of the stacking system.

The storage unit 602 is configured to record, by the local device, the MAC address of the first device.

The first sending unit 603 is configured to send, by the local device, the first stack acknowledgement packet in the Ethernet format from the second port to the first device, where the first stack acknowledgement packet carries the local device The MAC address and the second port are used as the information of the stack port, and the second port is located at the local device.

The creating unit 604 is configured to switch the second port from a normal service port to a stack port, and establish a stacking relationship with the first device.

In a first possible implementation manner, the first receiving unit is further configured to: receive a second stack enable message in a stack format sent by the first device, and convert the second stack enable message into an Ethernet The first stack of the network format enables the message.

The stackable device further includes:

And a second sending unit, configured to send, by using the third port, the first stack enable message in an Ethernet format to the third device.

a second receiving unit, configured to receive a third stack acknowledgment message in an Ethernet format sent by the third device by using the fourth port, where the fourth port is located in the third device, and the third stack acknowledges the packet The MAC address of the third device is carried, and the fourth port is used as information for the stack port of the local device.

a generating unit, configured to encapsulate, by the local device, the third stack acknowledgment message into a second stack acknowledgment message in a stack format, where the second stack acknowledgment message carries the local device and the third device a MAC address, the third port as the information of the stack port facing the third device, and the fourth port as the third device facing the stack port of the local device, where the The fourth port is located in the third device, and the third port is located in the local device.

And a switching unit, configured to switch the third port from a normal service port to a stack port facing the third device.

In a second possible implementation manner, the stackable device further includes:

The fourth sending unit is configured to broadcast, by the local device, a stack query message in an Ethernet format, where a source address of the stack query message is a MAC address of the local device, and a destination address is a broadcast.

a third receiving unit, configured to receive a stack response message in an Ethernet format sent by the first device, where the stack response message is used to notify the local device, where the first device is a master device of the stacking system, and Establish a stack relationship with the first device.

In a third possible implementation manner, the stacking device further includes:

The storage unit is further configured to delete the information saved by the local device.

The fourth sending unit is configured to send, by the local device, the stack format of the stack format to the first device to enable the acknowledgement message.

In a fourth possible implementation manner, the stacking device further includes:

And a fifth sending unit, configured to forward the stack de-enabled packet in a stack format to the third device by using the third port, to release a stacking relationship with the third device.

In a fifth possible implementation manner, the stacking device further includes:

With the above-mentioned embodiments, the switches of the stacking system can be configured to negotiate the different ports of the switch, and the different ports have different functions, and the stacking is enabled and the stacking is disabled. A stacking system can be created by auto-negotiation without manual configuration.

Correspondingly, as shown in FIG. 7 , the embodiment of the present invention further provides a stackable switch. The embodiment may be, for example, a second device that is a non-master device of the stack system in FIG. 1 . The stacking device in the middle is called a local device, and the device includes two

network interfaces

701, 705, a processor 702, and a memory 703. System bus 704 is used to connect network interface 701, processor 702, and memory 703.

The network interfaces 701 and 705 are hardware ports that can be switched between the normal service port and the stack port, and are respectively connected to a stackable switch. For example, in the embodiment shown in FIG. 1, the network interface 701 is connected to the first device. The network interface 705 is coupled to a third device for communicating with other stackable switches, and the processor 702 can be a CPU.

The memory 703 may be a persistent storage such as a hard disk drive and a flash memory having a software module and a device driver therein. The software modules are capable of performing the various functional modules of the above described methods of the present invention; the device drivers can be network and interface drivers.

At startup, these software components are loaded into memory 703 and then accessed by processor 702 and sent instructions:

Receiving, by the network interface 701, a stack enable message broadcasted by the first device, where the source address of the stack enable message is a MAC address of the first device, and the stack enable message carries other stacking systems to be established. The other device in the switch may establish the information of the stack relationship with the first device, where the first device is the master device of the stack system.

The processor 702 records the MAC address of the first device.

And sending, by the network interface 701, a stack acknowledgment message to the first device, where the stack acknowledgment message carries a MAC address of the second device and information that uses the network interface 701 as a stack port.

The processor 702 switches the network interface 701 from a normal service port to a stack port to establish a stack relationship with the first device.

Correspondingly, the embodiment of the present invention further provides a stackable device, which may be, for example, the first device in FIG. 1 as a non-master device of the stack system. For convenience of description, the stack device in this embodiment is referred to as The local device includes:

The sending unit 801 is configured to broadcast, by using the first port, the first stack-enabled packet in the Ethernet format, where the source address of the first stack-enabled packet is the MAC address of the local device, and the first stack Enable packets to carry other settings The device can be configured to establish a stack relationship with the local device, where the local device is the master device of the stacking system to be established, and the first port is located at the local device.

The receiving unit 802 is configured to receive a first stack acknowledgment message in an Ethernet format sent by the second device, where a destination address of the first stack acknowledgment message is a MAC address of the local device, and a source address is the The MAC address of the second device, where the second port is used as the information about the stack port of the local device, and the second port is located in the second device.

The switching unit 803 is configured to switch the first port from a normal service port to a stack port.

The storage unit 804 is configured to record a MAC address of the second device and a topological relationship between the first port and the second port.

Further, the receiving unit 802 is further configured to: receive a second stack acknowledgement packet in a stack format sent by the second device, where the second stack acknowledgement packet carries a MAC address of the second device and the third device, The third port is located as information facing a stack port of the third device, and the fourth port is used as information of the third device facing a stack port of the second device, where the fourth port is located The third device, the third port is located in the second device.

The storage unit 804 is further configured to: record a MAC address of the third device, and a topological relationship between the fourth port and the third port.

Further, the receiving unit 802 is further configured to receive a stack query message in an Ethernet format sent by the second device, where a source address of the stack query message is a MAC address of the second device.

The sending unit 801 is further configured to send, to the second device, a stack response message in an Ethernet format, where the stack response message is used to notify the second device, where the local device is a master of the stacking system. A device can establish a stack relationship with the first device.

And the sending unit 801 is further configured to: broadcast a stack-disabled packet in a stack format, where the stack-disabled packet carries a MAC address of the first device, and is used to notify the non-master device of the stacking system to release the The stacking system.

The storage unit 804 is further configured to delete the information saved by the first device after receiving the stack de-enabled acknowledgement message sent by the second device.

The switching unit 803 converts the first port from a stack port to a normal service port.

Correspondingly, as shown in FIG. 9 , the embodiment of the present invention further provides a stackable switch, which may be, for example, the first device in FIG. 1 as a main device of the stack system. For convenience of description, in this embodiment, The stacking device is called a local device, and the device includes a network interface 901, a processor 902, and a memory 903. System bus 904 is used to connect network interface 901, processor 902, and memory 903.

The network interface 901 is a hardware port that can perform state switching between a common service port and a stack port, and is respectively connected to a stackable switch. For example, in the embodiment shown in FIG. 1, the network interface 901 is connected to the second device. In communication with other stackable switches, the processor 902 can be a CPU.

The memory 903 may be a persistent storage such as a hard disk drive and a flash memory having a software module and a device driver therein. The software modules are capable of performing the various functional modules of the above described methods of the present invention; the device drivers can be network and interface drivers.

At startup, these software components are loaded into memory 903 and then accessed by processor 902 and sent instructions:

The first stack-enabled packet in the Ethernet format is broadcasted through the network interface 901, the source address of the first stack-enabled packet is the MAC address of the local device, and the first stack-enabled packet carries other The device can establish a stack relationship with the local device, where the local device is the master device of the stacking system to be established.

Receiving, by using the network interface 901, a first stack acknowledgment message in an Ethernet format sent by the second device, where the destination address of the first stack acknowledgment message is a MAC address of the local device, and the source address is the second device And a MAC address, where the second port is used as the information about the stack port of the local device, and the second port is located in the second device.

The processor 902 device switches the network interface 901 from a normal service port to a stack port, and the memory 3 records a MAC address of the second device and a topological relationship between the first port and the second port.

Those skilled in the art will further appreciate that the elements of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both, for clarity of hardware and software. Interchangeability, the composition and steps of the various examples have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

The steps of a method or algorithm described in connection with the embodiments disclosed herein can be implemented in hardware, a software module executed by a processor, or a combination of both. The software module can be placed in random access memory (English random access memory, abbreviation: RAM), memory, read-only memory (English: read only memory, abbreviation: ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, A hard disk, a removable disk, a compact disk read-only memory (English: Compact Disc Read-Only Memory, CD-ROM), or any other form of storage medium known in the art.

The embodiments, the technical solutions, and the beneficial effects of the present invention are further described in detail. It is to be understood that the foregoing description is only exemplary embodiments of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made by the present invention are intended to be included within the scope of the present invention.

Claims

A stack implementation method, the method comprising:

The first device broadcasts the first stack enable message in the Ethernet format by using the first port, the source address of the first stack enable message is the MAC address of the first device, and the first stack enable report The device carries the information that the other device can establish a stack relationship with the first device, where the first device is the master device of the stacking system to be established, and the first port is located in the first device;

The first device receives the first stack acknowledgment message in the Ethernet format sent by the second device, where the destination address of the first stack acknowledgment message is the MAC address of the first device, and the source address is the second a MAC address of the device, where the second port is used as the information about the stack port of the second device, and the second port is located in the second device;

The first device switches the first port from a normal service port to a stack port, and records a MAC address of the second device and a topological relationship between the first port and the second port.
The method of claim 1, wherein the first device switches the first port from a normal service port to a stack port, and records a MAC address of the second device and the first port and The topology relationship of the second port, and then includes:

Sending, by the first port, a second stack enable message in a stack format to the second device;

Receiving, by the first port, a second stack acknowledgment message in a stack format sent by the second device, where the second stack acknowledgment message carries a MAC address of the second device and the third device, and the third port is used as a Information about a stack port of the third device, and information that the fourth port is used as a stack port of the third device facing the second device, where the fourth port is located in the third device, The third port is located at the second device;

The first device records a MAC address of the third device, and a topological relationship between the fourth port and the third port.
A stack implementation method, the method comprising:

Receiving, by the second device, the first stack enable message in the Ethernet format broadcasted by the first device by using the second port, where the source address of the first stack enable message is the MAC address of the first device, where the A stack-enabled packet carries information that another device can establish a stack relationship with the first device, where the first device is a master device of a stacking system to be established;

The second device records the MAC address of the first device;

The second device sends a first stack acknowledgment message in the Ethernet format to the first device by using the second port, where the destination address of the first stack acknowledgment message is the MAC address of the first device, and the source address For the second device MAC address, the first stack acknowledgment message carries the second port as the information of the second device facing the stack port of the first device, and the second port is located in the second device;

Switching the second port from a normal service port to a stack port.
The method of claim 3, wherein the switching the second port from the normal service port to the stack port, establishing a stacking relationship with the first device, and further comprising:

Receiving, by the second device, the second stack enable message in the stack format sent by the first device by using the second port;

The second device converts the second stack enable message into a third stack enable message in an Ethernet format;

The second device sends the third stack enable message to the third device by using the third port, where the third port is located in the second device;

And receiving, by the third device, a third stack acknowledgment message in an Ethernet format sent by the fourth port, where the fourth port is located in the third device, and the destination address of the third stack acknowledgment message is the a MAC address of the second device, where the source address of the third stack acknowledgment message is a MAC address of the third device, and carrying the fourth port as information for a stack port of the second device;

The second device converts the third stack acknowledgment message into a second stack acknowledgment message in a stack format, where the second stack acknowledgment message carries the MAC address of the second device and the third device, The third port is used as the information of the second device facing the stack port of the third device, and the fourth port is used as the information of the third device facing the stack port of the second device, the fourth port Located at the third device;

Switching the third port from a normal service port to a stack port;

Sending, by the second port, the second stack acknowledgement message to the first device.
The method of claim 3, after establishing a stacking relationship with the first device, further comprising:

Receiving a stack-disabled packet in a stack format that is broadcast by the first device, where the stack-disabled packet carries a MAC address of the first device, and is used to notify the non-master device of the stacking system to cancel the stacking system;

Deleting information saved by the second device;

Sending, by the second device, the stack format of the stack format to the first device to enable the acknowledgement message;

Converting the second port from a stack port to a normal service port.
The method of claim 5, wherein the converting the second port from a stack port to a normal service port further comprises:

Forwarding, by the third port, the stack-disabled packet in the stack format to the third device, to release the stacking relationship with the third device;

After receiving the stack-disabled acknowledgement packet in the stack format sent by the third device, the third port is converted into a normal service port.
A stackable device, wherein the stackable device comprises:

a sending unit, configured to broadcast, by using the first port, a first stack-enabled packet in an Ethernet format, where a source address of the first stack-enabled packet is a MAC address of the local device, where the first stack is configured The device can carry the information that the other device can establish a stack relationship with the local device, where the local device is the master device of the stacking system to be established, and the first port is located at the local device;

a receiving unit, configured to receive a first stack acknowledgment message in an Ethernet format sent by the second device, where a destination address of the first stack acknowledgment message is a MAC address of the local device, and a source address is the second a MAC address of the device, where the second port is used as the information about the stack port of the local device, and the second port is located in the second device;

a switching unit, configured to switch the first port from a normal service port to a stack port;

a storage unit, configured to record a MAC address of the second device and a topological relationship between the first port and the second port.
The device of claim 7 wherein:

The sending unit is further configured to: send, by using the first port, a second stack enable message in a stack format to the second device;

The receiving unit is further configured to: receive, by using the first port, a second stack acknowledgment message in a stack format sent by the second device, where the second stack acknowledgment message carries a MAC address of the second device and the third device, The third port is located as information for the stack port of the third device, and the fourth port is used as information of the third device facing the stack port of the second device, where the fourth port is located a third device, where the third port is located in the second device;

The storage unit is further configured to: record a MAC address of the third device, and a topological relationship between the fourth port and the third port.
A stackable device, wherein the stackable device comprises:

a first receiving unit, configured to receive, by using the second port, the first stack enable message in an Ethernet format broadcast by the first device, where the source address of the first stack enable message is the first device MAC address, the first stack enable message carries information that another device can establish a stack relationship with the first device, and the first device is a master device of the stack system to be established;

a storage unit, configured to record, by the local device, a MAC address of the first device;

a first sending unit, configured to send, by using the second port, the first stack acknowledgement packet in an Ethernet format to the first device, where the destination address of the first stack acknowledgement packet is the first The MAC address of the device, the source address is the MAC address of the second device, and the first stack acknowledgment message carries the second port as the information of the stack port of the second device facing the first device. The second port is located at the local device;

And a creating unit, configured to switch the second port from a normal service port to a stack port.
The stacking device according to claim 9, wherein the first receiving unit is further configured to: receive, by using the second port, a second stack enable message in a stack format sent by the first device, where the second The stack-enabled packet is converted to the third stack-enabled packet in the Ethernet format.

The stacking device further includes:

a second sending unit, configured to send, by using the third port, the third stack enable message in an Ethernet format to the third device, where the third port is located in the second device;

a second receiving unit, configured to receive a third stack acknowledgment message in an Ethernet format sent by the third device by using the fourth port, where the fourth port is located in the third device, and the third stack acknowledges the packet The destination address is the MAC address of the second device, and the source address of the third stack acknowledgment packet is the third device, and the fourth port is configured as a stack port facing the local device. information;

a generating unit, configured to encapsulate, by the local device, the third stack acknowledgment message into a second stack acknowledgment message in a stack format, where the second stack acknowledgment message carries the local device and the third device a MAC address, the information of the third port being the stack port of the local device, and the fourth port being the information of the third device facing the stack port of the local device, The fourth port is located in the third device, and the third port is located in the local device;

a switching unit, configured to switch the third port from a normal service port to a stack port;

And a third sending unit, configured to send the second stack acknowledgement message to the first device by using the second port.
The stacking device of claim 10, further comprising:

a fourth receiving unit, configured to receive a stack-disabled packet in a stack format that is broadcast by the first device, where the stack-disabled packet carries a MAC address of the first device, and is used to notify a non-master of the stacking system The device is unstacked;

The storage unit is further configured to delete the information saved by the local device;

a fourth sending unit, configured to send, by the local device, the stack format of the stack format to enable the acknowledgement packet to the first device by using the second port;

The switching unit converts the second port from a stack port to a normal service port.
The stacking device of claim 11, further comprising:

a fifth sending unit, configured to forward the stack de-enabled packet in a stack format to the third device by using the third port, to release a stacking relationship with the third device;

The interface conversion unit is configured to convert the third port into a common service port after receiving the stack deactivation confirmation message sent by the third device.