CN108092896B

CN108092896B - Stacking system and aggregation group creation apparatus

Info

Publication number: CN108092896B
Application number: CN201711439636.6A
Authority: CN
Inventors: 彭剑远
Original assignee: Hangzhou H3C Technologies Co Ltd
Current assignee: Hangzhou H3C Technologies Co Ltd
Priority date: 2017-12-26
Filing date: 2017-12-26
Publication date: 2020-12-08
Anticipated expiration: 2037-12-26
Also published as: CN108092896A

Abstract

The present disclosure provides a stacking system including a CB device and two or more PE devices constituting a transverse stacking subsystem, and an aggregation group establishment apparatus. According to the stacking system and the aggregation group establishing device provided by the disclosure, a CB (chip component) device is provided with a sub-aggregation group established according to an MAC (media access control) address of a PE (provider edge) device and a physical port connected with the PE device, and the sub-aggregation group comprises a corresponding relation between the MAC address of the PE device and the physical port. Therefore, when a unicast message needs to be forwarded to the PE device, the CB device selects a port from the sub-aggregation group corresponding to the PE device to send the unicast message, so that the forwarding path of the unicast message is shortest, the bandwidth is saved, and the sending efficiency is improved.

Description

Stacking system and aggregation group creation apparatus

Technical Field

The present disclosure relates to the field of internet technologies, and in particular, to a stacking system and an aggregation group creation apparatus.

Background

An Intelligent Resilient Framework (IRF) is a technology for virtualizing a plurality of devices into one device for management and use. The IRF technology can connect multiple devices through IRF ports to form a virtual logical device. The user manages the virtual device to realize the management of all the physical devices in the virtual device. Under the condition that network access equipment is numerous at present, functions of realizing a single management domain, reducing network hierarchy, flattening management and the like are achieved in a virtualization access network mode, and the method is an important development trend. The CB-PE networking mode of the secondary stacking system is a typical networking mode that can meet the above requirements.

In a two-layer stacking system, CB (control Bridge) devices are stacked horizontally to form a first-level stack, PE (Port Extender) devices are stacked horizontally to form a second-level stack, and the CB devices and the PE devices are connected by a cascade link to form a second-level stacking system, which is also called a vertical stack. The CB device may serve as a master device of all the PE devices and is responsible for configuring and managing the PE devices. The PE device may be used as a remote service board of the CB device, and is responsible for transmitting a message sent by a user to the CB device for processing.

When the PE devices are stacked transversely, the transversely stacked PE devices are connected to the same cascade port of the CB device as different slot positions of the same frame, that is, different transversely stacked PE devices have the same frame number and different slot numbers. For example, two devices PE1 and PE2 correspond to slot 0 and slot 1, respectively, of box 100. For the CB device, the PE1 device and the PE2 device are connected to the same cascade interface, and use the same MAC address, so that in the existing stacking system, the CB device identifies the PE1 device and the PE2 device as the same PE device, and does not distinguish when forwarding a packet.

When the CB equipment receives an external message, the CB equipment looks up the table according to the destination address of the message and then forwards the message. For example, the destination MAC address of the packet corresponds to MAC addresses of the PE1 device and the PE2 device, the CB device sends the packet through a cascade interface connecting the PE1 device and the PE2 device, and according to the hash operation result, the packet is sent to the PE2 device with a probability of 50%. If the message is a unicast message of the user terminal connected to the PE1 device, the PE2 device is required to forward the message to the PE1 device, and the PE1 device sends the message to the user terminal.

In practical application, more PE devices are often stacked horizontally and share a cascade interface, so that a packet cannot be directly sent to a target PE device by a CB device, and the packet needs to be forwarded among the horizontally stacked PE devices one or more times to reach the target PE device, thereby wasting a large amount of forwarding bandwidth.

Disclosure of Invention

In view of this, the present disclosure provides a stacking system and an aggregation group establishing apparatus, which can minimize a forwarding path of a unicast packet and save bandwidth.

In order to achieve the above purpose, the technical scheme adopted by the disclosure is as follows:

in a first aspect, the present disclosure provides a stacking system, a CB device and two or more PE devices constituting a transverse stacking subsystem, each of the PE devices being configured to: when a longitudinal stacking subsystem is constructed with the CB device, generating an LLDP message carrying the MAC address of the PE device; sending the LLDP message to the CB equipment;

the CB device is used for establishing a sub-aggregation group of the PE device according to the MAC address of the PE device and the physical port for receiving the LLDP message, and the sub-aggregation group comprises the corresponding relation between the MAC address and the physical port.

In a second aspect, the present disclosure provides an aggregation group establishing apparatus, applied to each PE device of a stacking system, where two or more PE devices form a lateral stacking subsystem, the apparatus including:

the message generation module is used for generating an LLDP message carrying the MAC address of the PE equipment when the longitudinal stacking subsystem is constructed by the PE equipment and the CB equipment;

and the message sending module is used for sending the LLDP message to the CB device so that the CB device establishes a sub-aggregation group of the PE device according to the MAC address of the PE device and a physical port for receiving the LLDP message, wherein the sub-aggregation group comprises the corresponding relation between the MAC address and the physical port.

In a third aspect, an embodiment of the present disclosure provides an aggregation group establishing apparatus, which is applied to a CB device of a stacking system, where two or more PE devices in the stacking system form a transverse stacking subsystem, and the apparatus includes:

the address extraction module is used for extracting a source MAC address carried by the received LLDP message from each PE device; the source MAC address of the LLDP message from each PE device is the MAC address of each PE device;

and the sub-aggregation group establishing module is used for establishing the sub-aggregation group of the PE device according to the MAC address of the PE device and the physical port for receiving the LLDP message, wherein the sub-aggregation group comprises the corresponding relation between the MAC address and the physical port.

In the above stacking system and aggregation group establishing apparatus, the CB device is provided with a sub-aggregation group established according to the MAC address of the PE device and the physical port connected to the PE device, and the sub-aggregation group includes a correspondence between the MAC address of the PE device and the physical port. Therefore, when a unicast message needs to be forwarded to the PE device, the CB device selects a port from the sub-aggregation group corresponding to the PE device to send the unicast message, so that the forwarding path of the unicast message is shortest, the bandwidth is saved, and the sending efficiency is improved.

Additional features and advantages of the disclosure will be set forth in the description which follows, or in part may be learned by the practice of the above-described techniques of the disclosure, or may be learned by practice of the disclosure.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a diagram of a networking model of a stacking system according to an embodiment of the disclosure;

fig. 2 is a flowchart of a first aggregation group establishment method according to an embodiment of the present disclosure;

fig. 3 is a flowchart of a second aggregation group establishment method according to an embodiment of the present disclosure;

fig. 4 is a flowchart of a third aggregation group establishment method according to an embodiment of the disclosure;

FIG. 5 is an interaction diagram of an aggregate group establishment method according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of a VIRF system composed of CB-PEs according to an embodiment of the present disclosure;

fig. 7 is a block diagram of a first aggregation group establishment apparatus according to an embodiment of the present disclosure;

fig. 8 is a block diagram of a second aggregation group establishment apparatus according to an embodiment of the present disclosure;

fig. 9 is a block diagram of a third aggregation group establishment apparatus according to an embodiment of the present disclosure;

fig. 10 is a schematic structural diagram of a CB device according to an embodiment of the present disclosure.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the embodiments of the present disclosure will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present disclosure, but not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

The embodiment of the disclosure provides a stacking system and an aggregation group establishing device, and aims to solve the problem that in an existing stacking system, when forwarding a unicast message to a PE device by a CB device, the forwarding may be performed one or more times between laterally stacked PE devices, and a target PE device can be reached, which wastes forwarding bandwidth.

The stacking system provided by the embodiment of the disclosure includes a CB device and two or more PE devices constituting a transverse stacking subsystem, where each PE device is configured to: when a longitudinal stacking subsystem is constructed with the CB device, an LLDP message carrying the MAC address of the PE device is generated; and sending the LLDP message to the CB device. The CB device is used for establishing a sub-aggregation group of the PE device according to the MAC address of the PE device and the physical port for receiving the LLDP message, and the sub-aggregation group comprises the corresponding relation between the MAC address and the physical port.

Fig. 1 shows a networking model diagram of a stacking system according to an embodiment of the present disclosure, and as shown in fig. 1, a first lateral stacking subsystem is formed between two CB devices, namely CB1 and CB2, and a second lateral stacking subsystem is formed between two PE devices, namely PE1 and PE 2. And a longitudinal stacking subsystem is formed between the CB equipment and the PE equipment. The CB device may serve as a master device for all PE devices and is responsible for configuring and managing the PE devices. The PE device may be used as a remote service board of the CB device, and is responsible for transmitting a message sent by a user to the CB device for processing. It should be noted that fig. 1 is only an example, and in practical applications, the first lateral stacking subsystem may include more than two CB devices, and the second lateral stacking subsystem may also include more than two PE devices.

Each PE device comprises a message generation module and a message sending module. The message generation module is used for setting a TLV field in the LLDP message, wherein the TLV field comprises a designated identifier for indicating that the address carried in the designated position of the LLDP message is the MAC address of the PE device. And the message sending module is used for sending the LLDP message to the CB device.

And when the PE equipment and the CB equipment construct the longitudinal stacking subsystem, the PE equipment and the CB equipment send LLDP messages to each other. The PE device may generate an LLDP packet carrying its own MAC address. Optionally, a TLV (Type/Length/Value) field is set in the LLDP message, where the TLV field includes a designated identifier, and is used to indicate that an address carried in a designated location of the LLDP message is an MAC address of the PE device itself. For example, the T field may be used as a designated identifier for indicating that the information type carried in the V field of the LLDP packet is the MAC address of the PE device itself; the L field indicates the length of the MAC address of the PE device, and the V field is the MAC address information of the PE device.

The CB equipment comprises an address extraction module and a sub-aggregation group establishment module. The address extraction module is used for extracting a source MAC address carried by the received LLDP message from each PE device; and the source MAC address of the LLDP message from each PE device is the MAC address of each PE device. For example, the address extraction module may search whether a TLV field of the LLDP packet carries a specific identifier; if the TLV field carries the specified identifier, the source MAC address can be extracted from the specified location of the LLDP message.

The sub-aggregation group establishing module is used for establishing a sub-aggregation group of the PE device according to the MAC address of the PE device and the physical port for receiving the LLDP message, wherein the sub-aggregation group comprises the corresponding relation between the MAC address and the physical port.

The CB device also comprises a unicast message forwarding module which is used for selecting a port from the sub-aggregation group to send the unicast message if the physical port corresponding to the destination MAC of the unicast message to be sent belongs to the sub-aggregation group.

When the CB device receives an LLDP message sent by the PE device, extracting an MAC address of the PE device from the LLDP message; establishing a corresponding relation between the MAC address and a physical port receiving the LLDP message, or establishing a sub-aggregation group of the PE device according to the MAC address of the PE device and the physical port receiving the LLDP message; when the unicast message is sent, the physical port is selected to send the unicast message based on the sub-aggregation group, and because the physical interfaces in the sub-aggregation group are all independently corresponding to the PE equipment and do not correspond to the transverse stacking subsystem where the PE equipment is located, the unicast message is sent to the PE equipment and does not need to be forwarded by other PE equipment, so that the forwarding path of the unicast message is shortest, the bandwidth is saved, and the sending efficiency is improved.

Taking the system shown in fig. 1 as an example, if the destination MAC address of the current unicast message of the CB device is the MAC address of the user terminal connected to PE1, the CB device may determine, according to the information in the routing table, that the unicast message corresponds to the sub-aggregation group 1, so that the CB device may select an egress port from port 1 and port 3, if the unicast message is in CB1, port 1 is preferred as the egress port, if the unicast message is on CB2, port 3 is preferred as the egress port, and regardless of whether port 1 or port 3 is selected, the unicast message will be directly sent to PE1 by the CB device. If an egress port is selected from a physical port in the main aggregation group, port 2 or port 4 will be selected with high probability, so that the unicast packet will reach PE2 first and then be forwarded to PE1 by PE 2. Therefore, the unicast message is sent based on the sub-aggregation group, the forwarding times of the unicast message are saved, and the bandwidth of the system is further saved.

In an optional embodiment, the LLDP message generated by the message generation module of each PE device further carries a main MAC address of the horizontal stacking subsystem. The CB device also comprises a main set group establishing module.

When the LLDP message sent by the PE device further carries the main MAC address of the horizontal stacking subsystem, the address extraction module of the CB device is further configured to extract the main MAC address of the horizontal stacking subsystem from the LLDP message. The main aggregation group establishing module is used for establishing a main aggregation group of the transverse stacking subsystem according to the main MAC address and the physical port for receiving the LLDP message, and the main aggregation group comprises the corresponding relation between the main MAC address and the physical port.

A PE device in the same lateral stacking subsystem may be considered a device to an external device. As with the PE1 device and the PE2 device of fig. 1, the CB device assigns a logical interface to them using the same MAC address. For example, the PE1 device and the PE2 device may elect one of the devices as a master device and the other device as a slave device. The lateral stack subsystem consisting of the PE1 device and the PE2 device uses the MAC address of the master device as the MAC address of the lateral stack subsystem, hereinafter referred to as the master MAC address. For convenience of management, on the CB device, the physical ports connected to the horizontal stacking subsystem are aggregated into one logical interface, and in this embodiment, the corresponding relationship between the logical interface and the main MAC address and the physical port of the horizontal stacking subsystem is referred to as an aggregation group. For the purpose of distinction, the aggregation group in which the primary MAC address is located is referred to as a primary aggregation group in the embodiment of the present disclosure. Corresponding to the main aggregation group, if the MAC address is the MAC address of the PE device itself, the CB device may establish a sub-aggregation group corresponding to the MAC address, where the sub-aggregation group may include each physical port where the CB device is connected to the PE device.

Taking the system shown in fig. 1 as an example, PE1 is connected to CB1 through port 1, PE2 is connected to CB1 through port 2, PE1 is connected to CB2 through port 3, and PE2 is connected to CB2 through port 4. As shown in table 1, for a CB device, a lateral stacking subsystem composed of PE1 and PE2 corresponds to a main aggregation group 1, a logical interface of the main aggregation group 1 is identified as interface 1 using a main MAC address 1, physical ports of the main aggregation group 1 include four ports, i.e., port 1, port 2, port 3, and port 4, and the CB device performs unified configuration and management on the lateral stacking subsystem composed of PE1 and PE2 through the main aggregation group 1. The PE1 device corresponds to sub-aggregation-group 1, and its logical interface is identified as interface 2 using MAC address 2, and the physical ports of the sub-aggregation-group 1 include port 1 and port 3. The PE2 device corresponds to sub-aggregation-group 2, whose logical interface is identified as interface 3 using MAC address 3, and the physical ports of this sub-aggregation-group 2 include port 2 and port 4.

TABLE 1

The aggregation group identifiers in table 1 are selectable items, and when there is no aggregation group identifier item in table 1, each aggregation group may be distinguished by a logical interface identifier.

For example, an LLDP message sent by the PE device includes the MAC address of the PE device itself and the main MAC address of the lateral stacking subsystem. That is, the LLDP packet includes two TLV fields, where one TLV field carries the MAC address of the PE device itself, and the other TLV field carries the main MAC address of the transverse stacking subsystem.

After the CB device receives the LLDP message, the address extraction module respectively extracts the MAC address of the PE device and the main MAC address of the transverse stacking subsystem from the LLDP message. Specifically, the CB device detects that the LLDP packet includes two TLV fields, and can determine, through the type of information indicated by the T field in the TLV field, whether the MAC address carried in the TLV field is the MAC address of the PE device itself or the main MAC address of the transverse stacking subsystem. And extracting the MAC address of the PE equipment from the TLV field carrying the MAC address of the PE equipment, and extracting the main MAC address of the transverse stacking subsystem from the TLV field carrying the main MAC address of the transverse stacking subsystem.

The sub-aggregation group establishing module of the CB device establishes a sub-aggregation group of the PE device according to the MAC address of the PE device and a physical port for receiving the LLDP message; the sub-aggregation group includes a correspondence between the MAC address and the physical port of the PE device itself.

The main aggregation group establishing module of the CB device establishes a main aggregation group of the transverse stacking subsystem according to a main MAC address of the transverse stacking subsystem and a physical port for receiving the LLDP message, wherein the main aggregation group comprises a corresponding relation between the main MAC address and the physical port.

Still taking the system described in fig. 1 as an example, if the CB device receives, through the port 1, an LLDP message sent by the PE1, where the LLDP message carries the MAC address-MAC address 2 of the PE1 itself and the main MAC address-main MAC address 1 of the lateral stacking subsystem. The lateral stacking subsystem includes at least PE1 and PE 2. And extracting the MAC address 2 from the LLDP message, and establishing a corresponding relation between the MAC address 2 and the port 1, namely establishing the sub-aggregation group 1. And extracting a main MAC address 1 from the LLDP message, and establishing a corresponding relation between the main MAC address 1 and a port 1, namely establishing a main aggregation group 1.

If the destination MAC address of the current unicast message of the CB device is the MAC address of the user terminal connected to the PE1, the CB device may select an egress port of the unicast message from the sub-aggregation group 1, and since the physical ports in the sub-aggregation group 1 all correspond to the PE1, the unicast message may be directly sent to the PE1 by the CB device without being forwarded by other PE devices. Therefore, the unicast message is sent based on the sub-aggregation group, the forwarding times of the unicast message are saved, and the bandwidth of the system is further saved.

The main aggregation group includes physical ports to which CB devices are connected to a plurality of PE devices belonging to the lateral stacking sub-system, and the number of the physical ports may be much larger than the number of the physical ports in the sub-aggregation group. The physical ports in the main aggregation group belong to a logical interface, and the logical interface may be a logical interface allocated by the CB device for the main MAC address, so that the CB device configures and manages the PE devices in the horizontal stacking subsystem as a whole.

In summary, the CB device of the stacking system is provided with a sub-aggregation group established according to the MAC address of the PE device and the physical port connected to the PE device, where the sub-aggregation group includes a correspondence between the MAC address of the PE device and the physical port. Therefore, when a unicast message needs to be forwarded to the PE device, the CB device selects a port from the sub-aggregation group corresponding to the PE device to send the unicast message, so that the forwarding path of the unicast message is shortest, the bandwidth is saved, and the sending efficiency is improved.

Fig. 2 is a flowchart illustrating a first aggregation group establishment method provided by an embodiment of the present disclosure, where the method is applied to a PE device of a stacking system. The CB device and the PE device in the stacking system support LLDP (Link Layer Discovery Protocol). As shown in fig. 2, the method comprises the steps of:

step S202, when the PE device and the CB device construct a longitudinal stacking subsystem, an LLDP message carrying the MAC address of the PE device is generated.

Step S204, the LLDP message is sent to the CB device, so that the CB device establishes a sub-aggregation group of the PE device according to the MAC address of the PE device and the physical port for receiving the LLDP message, and the sub-aggregation group comprises the corresponding relation between the MAC address and the physical port.

The CB device receives an LLDP message sent by the PE device, and extracts an MAC address of the PE device from the LLDP message; establishing a corresponding relation between the MAC address and a physical port receiving the LLDP message, or establishing a sub-aggregation group of the PE device according to the MAC address of the PE device and the physical port receiving the LLDP message; when the unicast message is sent, the physical port is selected to send the unicast message based on the sub-aggregation group, and because the physical interfaces in the sub-aggregation group are all independently corresponding to the PE equipment and do not correspond to the transverse stacking subsystem where the PE equipment is located, the unicast message is sent to the PE equipment and does not need to be forwarded by other PE equipment, so that the forwarding path of the unicast message is shortest, the bandwidth is saved, and the sending efficiency is improved.

Optionally, the LLDP packet generated by the PE device may further carry a main MAC address of the lateral stacking subsystem (where the lateral stacking subsystem includes the PE device), so that the CB device establishes a main aggregation group of the lateral stacking subsystem according to the main MAC address and a physical port that receives the LLDP packet, where the main aggregation group includes a correspondence between the main MAC address and the physical port. For example, the CB device allocates a logical interface to the main MAC address, and adds the physical port to the logical interface corresponding to the main MAC address, so that the CB device configures and manages the PE devices in the horizontal stacking subsystem as a whole.

Corresponding to the first method embodiment, fig. 3 shows a flowchart of a second aggregation group establishment method provided by the embodiment of the present disclosure, which is applied to a CB device of a stacking system. The CB device and the PE device in the stacking system support the LLDP protocol. As shown in fig. 3, the method comprises the steps of:

step S302, when the LLDP message of the PE device is received, the source MAC address carried by the LLDP message is extracted.

The source MAC address is an MAC address of the PE device itself, that is, the LLDP message carries the MAC address of the PE device itself.

Further, when the CB device receives the LLDP packet of the PE device through a certain physical port, it searches whether the TLV field of the LLDP packet carries a specific identifier. And if the TLV field carries a designated identifier which indicates that the address carried in the designated position of the LLDP message is the MAC address of the PE device, extracting the source MAC address from the designated position of the LLDP message.

Step S304, establishing a sub-aggregation group of the PE device according to the MAC address of the PE device and a physical port for receiving the LLDP message; the sub-aggregation group includes a correspondence between the MAC address and the physical port of the PE device itself.

The physical port may be a local port belonging to the CB device, that is, a physical port through which the CB device is connected to the PE device, or a port on another CB device, that is, a physical port through which another CB device is connected to the PE device. Other CB devices herein are CB devices that are in the same lateral stacking subsystem as the CB device. For example, in the system shown in fig. 1, CB1 receives an LLDP packet sent by PE1, where the LLDP packet may be received through a local port of CB1, i.e., port 1, or may be received through port 3 of CB 2. Since CB1 is stacked horizontally with CB2, PE1 may also send LLDP messages to CB1 through CB2 when a physical port or link between PE1 and CB2 devices is unavailable.

Optionally, when the CB device receives the LLDP packet of the PE device, the MAC address of the PE device carried in the LLDP packet is extracted, and first, whether a sub-aggregation group corresponding to the MAC address exists is searched, and if not, step S304 is executed to establish the sub-aggregation group corresponding to the MAC address, or referred to as the sub-aggregation group of the PE device. The sub-aggregation group includes a corresponding relationship between the MAC address of the PE device itself and the physical port that receives the LLDP packet. And if the sub-aggregation group corresponding to the MAC address exists, judging whether the sub-aggregation group contains a physical port for receiving the LLDP message. And if not, adding the physical port receiving the LLDP message into the sub-aggregation group.

If the physical port corresponding to the destination MAC of the unicast message to be sent belongs to the sub-aggregation group, the port can be selected from the sub-aggregation group to send the unicast message.

For example, when the CB device receives a unicast packet from an external network, the MAC address of the next-hop node device, that is, the MAC address of a certain PE device, may be obtained according to an SRPD (Segment Routing Path descriptor) in the unicast packet. And searching a corresponding sub-aggregation group according to the MAC address of the next hop node equipment, selecting a port from the sub-aggregation group, and directly sending the single broadcast message to the PE equipment.

When the sub-aggregation group comprises a plurality of physical ports, in order to realize load balance, one physical port can be determined as an output port of the unicast message through Hash operation, and the unicast message is sent through a link corresponding to the output port; a local physical port passing through the CB device can be selected as an output port of the unicast message; if the link corresponding to the local physical port of the CB device is unavailable, the physical port on the other CB device in the sub-aggregation group may be selected as the egress port of the unicast packet.

Through the output port selected from the sub-aggregation group, the unicast message can be directly sent to the PE device. And the unicast message is not required to be forwarded by other PE equipment, so that the forwarding path of the unicast message is shortest, the bandwidth is saved, and the sending efficiency is improved.

In view of compatibility with the prior art, the CB device may uniformly manage a horizontal stacking subsystem where the PE device is located, and the LLDP packet may further carry a main MAC address of the horizontal stacking subsystem, and based on this, the method may further include: extracting a main MAC address of a transverse stacking subsystem from the LLDP message; and establishing a main aggregation group of the transverse stacking subsystem according to the main MAC address and the physical port for receiving the LLDP message, wherein the main aggregation group comprises the corresponding relation between the main MAC address and the physical port.

In consideration that the LLDP message may carry two MAC addresses, on the basis of the second method embodiment, fig. 4 shows a flowchart of a third aggregation group establishment method provided by the embodiment of the present disclosure, which is applied to a CB device of a stacking system. As shown in fig. 4, the method includes the steps of:

step S402, when the received LLDP message includes the MAC address of the PE device itself and the main MAC address of the horizontal stacking subsystem, respectively extracting the MAC address of the PE device itself and the main MAC address of the horizontal stacking subsystem from the LLDP message.

If the LLDP message sent by the PE device contains the MAC address of the PE device itself and the main MAC address of the transverse stacking subsystem, for example, the LLDP message contains two TLV fields, and the MAC address carried in the TLV field can be determined to be the MAC address of the PE device itself or the main MAC address of the transverse stacking subsystem according to the information type indicated by the T field in the TLV field. And extracting the MAC address of the PE equipment from the TLV field carrying the MAC address of the PE equipment, and extracting the main MAC address of the transverse stacking subsystem from the TLV field carrying the main MAC address of the transverse stacking subsystem.

Step S404, establishing a sub-aggregation group of the PE device according to the MAC address of the PE device and a physical port for receiving the LLDP message; the sub-aggregation group includes a correspondence between the MAC address and the physical port of the PE device itself.

Step S406, a main aggregation group of the lateral stacking subsystem is established according to the main MAC address of the lateral stacking subsystem and the physical port receiving the LLDP packet, where the main aggregation group includes a corresponding relationship between the main MAC address and the physical port.

Wherein, the order of step S404 and step S406 may be interchanged.

It will be appreciated that the main aggregation group includes physical ports to which CB devices are connected to a plurality of PE devices belonging to the lateral stacking subsystem, and the number of ports may be much larger than the number of physical ports in the sub-aggregation group. The physical ports in the main aggregation group belong to a logical interface, and the logical interface may be a logical interface allocated by the CB device for the main MAC address, so that the CB device configures and manages the PE devices in the horizontal stacking subsystem as a whole.

In the aggregation group establishment method provided in the foregoing embodiment, an interaction process between the PE device and the CB device is shown in fig. 5, and the process includes the following steps:

s1: and the PE equipment generates an LLDP message carrying the MAC address of the PE equipment and the main MAC address of the transverse stacking subsystem to which the PE equipment belongs.

The PE device generates an LLDP message, wherein the LLDP message at least comprises two TLV fields, the first TLV field contains the MAC address of the PE device, and the second TLV field contains the main MAC address of the transverse stacking subsystem to which the PE device belongs.

S2: and the PE equipment sends the LLDP message to the CB equipment.

S3: and the CB device extracts the MAC address of the PE device carried by the received LLDP message.

The CB device judges the TLV field carrying the MAC address of the PE device according to the information type indicated by the T field in the two TLV fields, and extracts the MAC address of the PE device from the corresponding position in the TLV field.

S4: the CB device establishes a sub-aggregation group of the PE device according to the MAC address of the PE device and a physical port for receiving the LLDP message; the sub-aggregation group includes the correspondence between the MAC address of the PE device and the physical port, so that the CB device can forward the unicast packet to the PE device through the shortest path when forwarding the unicast packet to the PE device.

S5: the CB device extracts the main MAC address of the lateral stacking subsystem from the LLDP message.

S6: the CB equipment establishes a main aggregation group of a transverse stacking subsystem according to the main MAC address and a physical port for receiving the LLDP message; the master aggregation group includes a correspondence of a master MAC address and a physical port.

S7: and if the physical port corresponding to the destination MAC of the unicast message to be sent belongs to the sub-aggregation group, the CB equipment selects the port from the sub-aggregation group.

S8: and the CB equipment forwards the unicast message to the PE equipment through the selected output port.

Fig. 6 shows a schematic structural diagram of a Vertical Intelligent Resilient Framework (vrf) system composed of CB-PEs according to an embodiment of the present disclosure, and taking the system shown in fig. 6 as an example, if a user terminal UE1 sends a unicast message to a user terminal UE2, a destination MAC address of the unicast message is a MAC address of the UE2, and the destination MAC address is a MAC address of a user terminal connected to the PE 1. The unicast message is sent to the CB1 by the UE1, the CB1 queries the routing table according to the destination MAC address of the unicast message to determine that the unicast message corresponds to the sub-aggregation group 1, so the CB device selects an egress port from the port 1 and the port 3, because the unicast message is in the CB1, the port 1 is preferably used as an egress port of the unicast message, if the data link between the port 1 and the PE1 is unavailable, the port 3 can be selected as an egress port of the unicast message, and the unicast message is directly sent to the PE1 by the CB device regardless of whether the port 1 or the port 3 is selected.

If the UE3 sends a unicast message to the UE2, the destination MAC address of the unicast message is the MAC address of the UE2, which is the MAC address of the UE connected to the PE 1. The unicast message is sent to the CB2 by the UE3, the CB2 queries the routing table according to the destination MAC address of the unicast message to determine that the unicast message corresponds to the sub-aggregation group 1, so the CB device selects an egress port from the port 1 and the port 3, because the unicast message is in the CB2, the port 3 is preferably used as an egress port of the unicast message, if the data link between the port 3 and the PE1 is unavailable, the port 1 can be selected as an egress port of the unicast message, and the unicast message is directly sent to the PE1 by the CB device regardless of whether the port 3 or the port 1 is selected. Therefore, the unicast message is sent based on the sub-aggregation group, the forwarding times of the unicast message are saved, and the bandwidth of the system is further saved.

According to the aggregation group establishment method, a CB device is provided with a sub-aggregation group established according to an MAC address of a PE device and a physical port connected with the PE device, and the sub-aggregation group comprises a corresponding relation between the MAC address of the PE device and the physical port. Therefore, when a unicast message needs to be forwarded to the PE device, the CB device selects a port from the sub-aggregation group corresponding to the PE device to send the unicast message, so that the forwarding path of the unicast message is shortest, the bandwidth is saved, and the sending efficiency is improved.

Corresponding to the first method embodiment, referring to the schematic structural diagram of the first aggregation group establishing apparatus shown in fig. 7, the apparatus is applied to each PE device of the stacking system, and two or more PE devices form a transverse stacking subsystem. The CB device and the PE device in the stacked system support LLDP. The device includes:

the packet generation module 71 is configured to generate an LLDP packet carrying an MAC address of the PE device when the PE device and the CB device construct a vertical stacking subsystem;

the packet sending module 72 is configured to send the LLDP packet to the CB device, so that the CB device establishes a sub-aggregation group of the PE device according to the MAC address of the PE device and the physical port that receives the LLDP packet, where the sub-aggregation group includes a corresponding relationship between the MAC address and the physical port.

The message generating module 71 may be further configured to: and setting a TLV field in the LLDP message, wherein the TLV field comprises a designated identifier for indicating that the address carried in the designated position of the LLDP message is the MAC address of the PE device. The LLDP message may also carry a main MAC address of the transverse stacking subsystem, so that the CB device establishes a main aggregation group of the transverse stacking subsystem according to the main MAC address and a physical port that receives the LLDP message, where the main aggregation group includes a correspondence between the main MAC address and the physical port.

Corresponding to the second method embodiment, refer to the schematic structural diagram of the second aggregation group establishing apparatus shown in fig. 8, where the apparatus is applied to PE devices of a stacking system, and the PE devices and one or more PE devices form a transverse stacking subsystem. The CB device and the PE device in the stacked system support LLDP. The device includes:

an address extraction module 81, configured to extract a source MAC address carried in the received LLDP packet from each PE device; the source MAC address of the LLDP message from each PE device is the MAC address of each PE device;

and a sub-aggregation group establishing module 82, configured to establish a sub-aggregation group of the PE device according to the MAC address of the PE device and the physical port that receives the LLDP packet, where the sub-aggregation group includes a correspondence between the MAC address and the physical port.

The address extraction module 8 may be further configured to: searching whether a TLV field of the LLDP message carries a designated identifier or not; if yes, extracting the source MAC address from the specified position of the LLDP message.

In an alternative embodiment, as shown in fig. 9, the apparatus may further include:

a main aggregation group establishing module 91, configured to extract a main MAC address of the horizontal stacking subsystem from the LLDP packet; and establishing a main aggregation group of the transverse stacking subsystem according to the main MAC address and the physical port for receiving the LLDP message, wherein the main aggregation group comprises the corresponding relation between the main MAC address and the physical port.

And a unicast message forwarding module 92, configured to select a port from the sub-aggregation group to send the unicast message if the physical port corresponding to the destination MAC of the unicast message to be sent belongs to the sub-aggregation group.

In the aggregation group establishment apparatus, the implementation manner and effect of each module may refer to the method embodiment, which is not described herein again.

In the aggregation group establishing apparatus provided in the embodiment of the present disclosure, a CB device is provided with a sub-aggregation group established according to an MAC address of a PE device and a physical port connected to the PE device, where the sub-aggregation group includes a correspondence between the MAC address of the PE device and the physical port. Therefore, when a unicast message needs to be forwarded to the PE device, the CB device selects a port from the sub-aggregation group corresponding to the PE device to send the unicast message, so that the forwarding path of the unicast message is shortest, the bandwidth is saved, and the sending efficiency is improved.

Fig. 10 shows a schematic structural diagram of a CB device provided in an embodiment of the present disclosure, such as the above CB device. As shown in fig. 10, the CB device includes a memory 100 and a processor 101; the memory 100 is used for storing one or more computer instructions, which are executed by the processor to implement the method for generating the alarm level.

Further, the network device shown in fig. 10 further includes a bus 102 and a physical interface 103, and the processor 101, the physical interface 103, and the memory 100 are connected by the bus 102.

The Memory 100 may include a high-speed Random Access Memory (RAM) and may further include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. The CB device is provided with a plurality of physical interfaces 103, and a communication connection between the system network element and at least one other network element, for example, a connection between the CB device and the PE device, is realized through the plurality of physical interfaces 103 (which may be wired or wireless). The bus 102 may be an ISA bus, PCI bus, EISA bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one double-headed arrow is shown in FIG. 10, but this does not indicate only one bus or one type of bus.

The processor 101 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 101. The Processor 101 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the device can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 100, and the processor 101 reads the information in the memory 100, and completes the steps of the method of the foregoing embodiment in combination with the hardware thereof.

Further, embodiments of the present invention also provide a machine-readable storage medium storing machine-executable instructions that, when invoked and executed by a processor, cause the processor to implement any of the above described aggregation group establishment methods.

The computer program product of the aggregation group establishment method and apparatus provided by the embodiments of the present disclosure includes a machine-readable storage medium storing a program code, where instructions included in the program code may be used to execute the method described in the foregoing method embodiments, and specific implementation may refer to the method embodiments, and is not described herein again.

The aggregation group establishment method, the aggregation group establishment device and the storage medium have the same technical characteristics, can solve the same technical problems and achieve the same technical effects.

In the aggregation group establishment method and apparatus provided by the embodiments of the present disclosure, the functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present disclosure may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present disclosure. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

Finally, it should be noted that: the above-mentioned embodiments are merely specific embodiments of the present disclosure, which are used for illustrating the technical solutions of the present disclosure and not for limiting the same, and the scope of the present disclosure is not limited thereto, and although the present disclosure is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive of the technical solutions described in the foregoing embodiments or equivalent technical features thereof within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present disclosure, and should be construed as being included therein. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. A stacking system, comprising a Control Bridge (CB) device and more than two Port Expansion (PE) devices constituting a transverse stacking subsystem, wherein each PE device is configured to: when a longitudinal stacking subsystem is constructed with the CB device, generating an LLDP message carrying the MAC address of the PE device; sending the LLDP message to the CB equipment;

2. The system of claim 1, wherein each of the PE devices comprises: and the message generation module is used for setting a TLV field in the LLDP message, wherein the TLV field comprises a designated identifier and is used for indicating that an address carried in a designated position of the LLDP message is the MAC address of the PE device.

3. The system of claim 1, wherein the CB device comprises:

4. The system of claim 3, wherein the address extraction module is further configured to: searching whether a TLV field of the LLDP message carries a designated identifier or not; if yes, extracting the source MAC address from the appointed position of the LLDP message.

5. The system according to claim 3, wherein the LLDP message generated by each PE device further carries a main MAC address of the horizontal stacking subsystem;

the address extraction module of the CB device is also used for extracting the main MAC address of the transverse stacking subsystem from the LLDP message;

the CB device further includes a main aggregation group establishing module configured to establish a main aggregation group of the transverse stacking subsystem according to the main MAC address and the physical port that receives the LLDP packet, where the main aggregation group includes a correspondence between the main MAC address and the physical port.

6. The system of claim 1, wherein the CB device further comprises: and the unicast message forwarding module is used for selecting a port from the sub-aggregation group to send the unicast message if the physical port corresponding to the destination MAC of the unicast message to be sent belongs to the sub-aggregation group.

7. An aggregation group establishment apparatus, applied to each port expansion PE device of a stacking system, where two or more PE devices form a lateral stacking subsystem, the apparatus comprising:

the message generation module is used for generating an LLDP message carrying the MAC address of the PE equipment when the longitudinal stacking subsystem is constructed by the PE equipment and the control bridge CB equipment;

8. The apparatus of claim 7, wherein the message generation module is further configured to:

and setting a TLV field in the LLDP message, wherein the TLV field comprises a designated identifier for indicating that an address carried in a designated position of the LLDP message is the MAC address of the PE device.

9. The apparatus according to claim 7, wherein the LLDP message further carries a main MAC address of the horizontal stacking subsystem, so that the CB device establishes a main aggregation group of the horizontal stacking subsystem according to the main MAC address and a physical port that receives the LLDP message, where the main aggregation group includes a correspondence between the main MAC address and the physical port.

10. An aggregation group establishment apparatus, applied to a Control Bridge (CB) device of a stacking system, where two or more Port Expansion (PE) devices in the stacking system form a transverse stacking subsystem, the apparatus comprising:

11. The apparatus of claim 10, wherein the address extraction module is further configured to:

searching whether a TLV field of the LLDP message carries a designated identifier or not;

if yes, extracting the source MAC address from the appointed position of the LLDP message.

12. The apparatus of claim 10, wherein the address extraction module of the CB device is further configured to extract the main MAC address of the lateral stacking subsystem from an LLDP message;

the device further comprises a main aggregation group establishing module, configured to establish a main aggregation group of the transverse stacking subsystem according to the main MAC address and the physical port that receives the LLDP packet, where the main aggregation group includes a correspondence between the main MAC address and the physical port.

13. The apparatus of claim 10, further comprising:

and the unicast message forwarding module is used for selecting a port from the sub-aggregation group to send the unicast message if the physical port corresponding to the destination MAC of the unicast message to be sent belongs to the sub-aggregation group.