WO2021254079A1

WO2021254079A1 - Method for issuing route in campus network, and network device

Info

Publication number: WO2021254079A1
Application number: PCT/CN2021/094673
Authority: WO
Inventors: 汪祖亮; 胡志波; 王翠军; 贺行健; 陈闯
Original assignee: 华为技术有限公司
Priority date: 2020-06-19
Filing date: 2021-05-19
Publication date: 2021-12-23
Also published as: CN113824633A; CN113824633B

Abstract

Provided are a method for issuing a route in a campus network, and a network device, which relate to the technical field of communications. The method comprises: a network device issuing aggregation routes to neighbor devices at a previous level which are connected to the network device, and issuing default routes to neighbor devices at a next level which are connected to the network device, wherein the levels indicate the positions, in a network topology, of devices in a campus network; the aggregation route is the aggregation of detailed routes received by the network device from the neighbor devices at the next level which are connected to the network device, and the default routes instruct the neighbor devices at the next level to forward messages to designated addresses corresponding to the default routes when routes corresponding to destination addresses are not successfully acquired. On the basis of a level at which a network device is located in a campus network, the network device issues aggregation routes to neighbor devices at a previous level of the network device, and issues default routes to neighbor devices at a next level of the network device, such that the network device issues different routes to neighbor devices at different levels, thereby reducing the number of issued routes of the network device in the campus network.

Description

Route publishing method and network equipment in campus network

Cross-references to related applications

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office, the application number is 202010566336.X, and the application name is "The method and network equipment for routing and publishing in the campus network" on June 19, 2020, the entire content of which is incorporated by reference In this application.

Technical field

This application relates to the field of communication technology, and in particular, to a method and network equipment for issuing routes in a campus network.

Background technique

Generally, the network equipment in the campus network is configured with a link state protocol so that the network equipment in the park can learn the routes issued by other network devices in the campus network based on the link state protocol, determine the route forwarding table, and guide the forwarding of packets. However, as the scale of the campus network expands, the network topology is constantly changing, and the routing information that network devices have to learn continues to increase. Because the performance of different network devices in the campus network is not the same, some network devices have low performance. Learn all the routing information advertised by the network devices in the campus network. Therefore, the forwarding of packets in the campus network is affected.

Summary of the invention

Based on this, the present application provides a method and network device for issuing routes in a campus network, which reduces the number of routes issued by network devices in the campus network without affecting message forwarding.

In the first aspect, this application provides a route release method in a campus network. In this method, a network device advertises an aggregated route to neighbor devices connected to the network device at a higher level; and to neighbors at a lower level connected to the network device. The device advertises a default route; among them, the level indicates the position of each device in the campus network in the network topology; the aggregation route is the aggregation of the detailed routes received by the network device from the next-level neighbor devices connected to the network device; among them, The default route instructs the next-level neighboring device to forward the packet to the specified address corresponding to the default route when it fails to obtain the route corresponding to the destination address.

In this application, the network device advertises the aggregation route to the neighbor device of the upper level connected to it, and sends the default route to the neighbor device of the next level connected to it. This method avoids the need for network devices in the campus network to learn from the campus network. In the case of detailed routing issued by all network devices at all levels, network devices only need to learn the routing information issued by network devices at adjacent levels to forward packets in the entire network. This method reduces the routing of network devices on the one hand. The number of releases, on the other hand, also reduces the number of routing learning for network devices in the campus network. In this way, network devices do not need to obtain detailed routing information of each device, which further saves the storage space of network devices and helps improve network device performance. Processing efficiency.

In a possible implementation manner, the network device advertises the detailed route and the aggregation route of the network device to neighbor devices of the same level connected to the network device.

In this way, the network device can publish the detailed route of the network device and the aggregated aggregation route of the detailed route of the next-level neighbor device to the neighbor devices of the same level, so that the neighbor devices of the same level can forward packets, and Neighbor devices of the same level can forward packets to neighbor devices of the next level.

In one possible implementation, the network device obtains the message sent by the neighboring device; among them, the message is an open shortest path first (OSPF) protocol message or an intermediate system to an intermediate system (intermedia system- Intermedia system (IS-IS) protocol message; the message carries a field used to indicate the level of the neighboring device; and according to the field used to indicate the device level of the neighboring device in the message, the level of the neighboring device is obtained.

The network device can obtain the tier to which the neighbor device belongs based on the message information sent by the neighbor device, so that the network device can send corresponding routing information to the neighbor device based on the neighbor device's tier information, so as to reduce the number of routes advertised by the network device.

In a possible implementation, the network device stores the default route published by the neighboring device of the upper level connected to the network device in the first link state database (LSDB); it will be connected to the network device The detailed route advertised by the neighboring device of the next level is stored in the second LSDB; the detailed route advertised by the neighboring device of the same level connected to the network device is stored in the first LSDB.

By storing the routing information advertised by the neighboring device received by the network device in the LSDB, it is convenient for the network device to determine the packet forwarding path according to the routing information.

In a second aspect, the present application provides a network device, including: a processing unit; wherein the processing unit is used to publish an aggregation route to neighbor devices connected to the network device at a higher level; and to the next network device connected to the network device. Hierarchical neighbor devices advertise default routes; among them, the hierarchy indicates the position of each device in the campus network in the network topology; aggregation routing is the aggregation of detailed routes received by the network device from the next-level neighbor devices connected to the network device ; Among them, the next-level neighbor device forwards the message to the designated address corresponding to the default route when it fails to obtain the route corresponding to the destination address.

In a third aspect, the present application provides a communication device, including: a processor and a memory;

The memory stores a computer program; the processor is configured to execute the computer program stored in the memory, so that the method described in any one of the above-mentioned first aspects is executed.

In a fourth aspect, the present application provides a communication device, including: a processor and an interface circuit; the interface circuit is used to receive code instructions and transmit them to the processor; the processor is used to run the code instructions to execute The solution described in any one of the first aspect above.

In a fifth aspect, the present application provides a computer-readable storage medium. The computer-readable storage medium stores computer-readable instructions. When the computer reads and executes the computer-readable instructions, the computer executes any of the above-mentioned aspects of the first aspect. plan.

In a sixth aspect, this application provides a computer program product, which when a computer reads and executes the computer program product, causes the computer to execute any of the solutions described in the first aspect above.

For the technical effects that can be achieved from the second aspect to the sixth aspect described above, please refer to the description of the technical effects that can be achieved by the corresponding possible design solutions in the first aspect described above, which will not be repeated here in this application.

Description of the drawings

Figure 1 shows a schematic diagram of the structure of a campus network;

FIG. 2 shows a schematic flowchart of a route publishing method in a campus network provided by an embodiment of the present application;

FIG. 3 shows a schematic diagram of route advertisement in a campus network provided by an embodiment of the present application;

FIG. 4 shows a schematic diagram of route advertisement in a campus network provided by an embodiment of the present application;

FIG. 5 shows a schematic diagram of route advertisement in a campus network provided by an embodiment of the present application;

Figure 6 shows a schematic structural diagram of a network device provided by an embodiment of the present application;

FIG. 7 shows a schematic structural diagram of a communication device provided by an embodiment of the present application;

Fig. 8 shows a schematic structural diagram of a communication device provided by an embodiment of the present application.

detailed description

In order to make the objectives, technical solutions, and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in detail below in conjunction with the drawings in the embodiments of the present application.

The campus network mainly includes the terminal layer, access layer, convergence layer, and core layer, as shown in Figure 1. The terminal layer includes terminal devices connected to the campus network, such as smart terminals, mobile phones, and personal computers (PCs). ), printers, etc. The access layer provides the campus network access function for terminal devices and is the boundary of the campus network. The access layer includes access devices, which can communicate with terminal devices. The access device is connected with the network device of the convergence layer through an interface. The convergence layer connects the access layer and the core layer, and the convergence layer includes convergence equipment. The core layer is the backbone area of the campus network, which can be connected to the aggregation layer and other components of the campus network (if any). The other component of the campus network is, for example, the data center. The core layer can be the exit of the campus network, and the core layer includes core equipment.

In addition, the network equipment at the core layer establishes a connection with the network outside the park (Internet (Internet) or wide area network (WAN)) through the network equipment in the exit zone, so as to realize the interaction of data information. The network device of the layer can be a switch or a router, which is not specifically limited here.

As described in the background art, in order to forward messages, network devices in a campus network generally need to learn routing information issued by all network devices in the campus network, which occupies a large amount of storage space of the network devices. In order to prevent network equipment from learning the routes of the network equipment of the entire network, divide the network equipment into multiple areas. For example, when the network equipment configured with the OSPF protocol is divided into areas, the interfaces of the equipment can be added to the backbone area or non-backbone area. , Area 0 is the backbone area, Area 2 and Area 3 are non-backbone areas. Since Area 0 is the backbone area, the LSDB of the network equipment in Area 0 carries the routes advertised by all network equipment in the campus network, and Area 2 and Area 3 are In non-backbone areas, the LSDB of the network equipment only carries the routes advertised by the network equipment in the area directly connected to the area. Therefore, direct communication between area 2 and area 3 cannot be carried out, and the forwarding of network equipment in area 0 is required. Communication.

Therefore, it can be known that network devices in different areas only need to learn the routes advertised by the network devices in the area directly connected to the area to which they belong, instead of learning the routes of the entire network, which reduces the number of route learning for network devices. However, there may be hundreds of interfaces of network equipment. Adding the interfaces of the equipment to the corresponding areas one by one is time-consuming and laborious, and mistakes may also occur. In addition, the regional configuration of network equipment cannot reflect the actual network topology level of the network equipment, and cannot meet the actual topology requirements of the network equipment.

Based on this, this application provides a route announcement method in a campus network, which reduces the number of routes issued by network devices in the campus network without affecting message forwarding, and can also reflect the actual topology of the network devices.

It should be understood that, in the embodiments of the present application, the network device needs to support the functions of routing forwarding and advertising routes. The network device may be a router or a layer 3 switch, which is not specifically limited here. Any network device that meets the requirements is applicable to the network device. Apply. In this application, the network equipment may include at least one of a core switch, an aggregation switch, and an access switch.

The neighbor device is also the device directly connected to the network device. For example, the network device is the core switch, and the device directly connected to the core switch is the aggregation switch, then the aggregation switch is the neighbor device of the core switch. Including the aggregation switch, the aggregation switch is also a neighboring device of the core switch.

The level is used to indicate the location of the network equipment in the campus network. The level can be identified by number/letter coding, such as: L1 represents the core layer, L2 represents the convergence layer, L3 represents the access layer, L4 represents the next layer of the access layer, where the network device of the L1 layer is the neighbor device of the upper level of the network device of the L2 layer; the network device of the L3 layer is the neighbor device of the next level of the network device of the L2 layer; The network device of the L2 layer is the neighbor device of the upper level of the network device of the L3 layer, and the network device of the L4 layer is the neighbor device of the lower level of the network device of the L3 layer.

Detailed routes are also routes that have not been summarized. For example, network device 1 advertises a detailed route with a destination address of 192.168.0.1, that is, other devices can find network device 1 through the address 192.168.0.1.

Aggregated routes are summarized routes. For example, the detailed routes with the destination address of 192.168.0.0-192.168.0.255 received by network device 1 and the detailed routes received by network device 1 belong to the subnet mask 255.255.255.0, so Network device 1 can aggregate the received detailed routes into one route, that is, 192.168.0.0/24, but in actual applications, it can also aggregate detailed routes into multiple routes based on the mask length information, for example, the destination address The detailed routes for 192.168.0.0-192.168.0.31 are aggregated into one route 192.168.0.0/27; the detailed routes for the destination address 192.168.0.32-192.168.0.63 are aggregated into one route 192.168.0.32/27; the destination address is aggregated The detailed routes of 192.168.0.64-192.168.0.95 are aggregated into a route 192.168.0.64/27; the detailed routes of the destination address of 192.168.0.96-192.168.0.127 are aggregated into a route of 192.168.0.96/27; the destination address is aggregated The detailed routes of 192.168.0.128-192.168.0.159 are aggregated into one route 192.168.0.128/27; the detailed routes of the destination address 192.168.0.160-192.168.0.191 are aggregated into one route 192.168.0.160/27; the destination address The detailed routes of 192.168.0.192-192.168.0.223 are aggregated into one route 192.168.0.192/27; the detailed routes of the destination address 192.168.0.224-192.168.0.255 are aggregated into one route 192.168.0.224/27. In addition, detailed routes corresponding to destination addresses with different subnet masks cannot be aggregated. For example, detailed route 1 with a destination address of 192.168.0.1 has a subnet mask of 255.255.255.224 and a detailed route with destination address of 192.168.0.1. The subnet mask of 2 is 255.255.255.0. Because the detailed route 1 and the detailed route 2 do not belong to the same subnet mask, they cannot be aggregated. If the network device 1 receives the routes advertised by the next-level neighbor devices including detailed routes and aggregation routes, or both are aggregation routes, the network device 1 may further aggregate the routes including the aggregation route.

The default route, that is, when the network device cannot find the route corresponding to the destination address when forwarding the message, the message is sent to a specified address, such as: network device 1 forwards the message to network device 2, but network device 1 If the route of the network device 2 is not obtained, the network device 1 can forward the message to the specified address (that is, the address of the default route). In order to illustrate the default route in this application more clearly, the following example can be used to illustrate: the neighbor device of the upper level of network device 1 is network device 2, the neighbor device of the next level is network device 3, and network device 1 will Network device 2 sends the aggregate information of the detailed routing of the next-level neighbor devices, that is, the aggregate route, and advertises default routing information to network device 3, that is, if network device 3 forwards a message to network device 2, it cannot obtain network device 2 When routing, the message can be forwarded to the designated address, and the message can be forwarded to the network device 2 through the designated address.

In this application, "and/or" describes the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone , Where A and B can be singular or plural. The character "/" generally indicates that the associated objects before and after are in an "or" relationship. "The following at least one item (a)" or similar expressions refers to any combination of these items, including any combination of a single item (a) or a plurality of items (a). For example, at least one of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, and c can be single or multiple. The singular expressions "a", "an", "said", "above", "the" and "this" are intended to also include expressions such as "one or more" unless the context clearly indicates The ground has the opposite direction. And, unless otherwise stated, the ordinal numbers such as "first" and "second" mentioned in the embodiments of this application are used to distinguish multiple objects, and are not used to limit the order, timing, priority, or order of multiple objects. Importance.

The reference to "one embodiment" or "some embodiments" described in the specification of this application means that one or more embodiments of this application include a specific feature, structure, or characteristic described in combination with the embodiment. Therefore, the sentences "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. appearing in different places in this specification are not necessarily All refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized. The terms "including", "including", "having" and their variations all mean "including but not limited to" unless otherwise specifically emphasized.

Refer to Figure 2 for a schematic flow chart of a method for issuing routes in a campus network according to an embodiment of this application. The method is executed on the side of the network device. The device advertises the aggregation route; among them, the level indicates the position of each device in the campus network in the network topology; the aggregation route is the aggregation of the detailed routes received by the network device from the next-level neighbor devices connected to the network device.

Step 202: The network device advertises a default route to the neighboring device of the next level connected to the network device, where the default route instructs the neighboring device of the next level to forward the message to when it fails to obtain the route corresponding to the destination address The specified address corresponding to the default route.

In addition, step 202 and step 203 in FIG. 2 can be performed in no particular order, and can be performed at the same time, or in order, step 203 is performed first and then step 202 is performed, or step 202 is performed first and then step 203 is performed. In the order of execution This application does not make specific limitations.

In addition, in order to ensure that neighboring devices at adjacent levels can forward packets to network devices, network devices will also publish their detailed routes to neighboring devices at the next higher level and neighboring devices at the next level, so that the network equipment can communicate with neighboring devices at the next higher level. Direct information exchange.

When the campus network is networked, the location of the network equipment is planned in advance. For example, the network equipment of the L1 layer is located in the core layer including the core equipment, and the network equipment of this layer can be connected with the aggregation equipment and the core equipment. The network of the L2 layer Devices located at the convergence layer include convergence devices, and network devices at this layer can be connected to convergence devices, core devices, and access devices. Schematically, as shown in Figure 3, the network device 1 is located at the L2 layer, the neighbor devices of the upper layer include network device 2 and network device 3, and the neighbor devices of the next layer include network device 4 and network Equipment 5. Network device 1 can publish to network device 2 and network device 3 its detailed route route 1, and the aggregate route route 6 of network device 4 and network device 5's detailed route. The destination address corresponding to route 1 is address 1. This route The destination address corresponding to 6 is address 6, so that network device 2 and network device 3 can forward packets to network device 1 through address 1. The message is forwarded to the network device 4 or the network device 5 through the address 6. Network device 1 can also advertise route 1 and default route route 0 to network device 4 and network device 5, so that network device 4 and network device 5 can forward packets to network device 1 through address 1, and send the message through address 0 Forward to network device 2 or network device 3, where the designated address corresponding to the default route route 0 is address 0. Since campus networks usually have a tree structure, network devices either forward packets to the leaf direction or forward packets to the root direction. Therefore, the default route can be used to instruct the network device to forward all packets that have not found a route to the root direction.

In the embodiment of this application, the network device advertises the aggregation route to the neighbor devices of the upper level connected to it, and advertises the default route to the neighbor devices of the next level connected to it. This method prevents the network devices in the campus network from learning the campus network. In the case of detailed routing issued by all network devices at all levels in the network, network devices only need to learn the routing information issued by adjacent network devices to forward messages across the entire network. This method reduces The number of route announcements for network devices on the other hand also reduces the number of route learning for network devices in the campus network. In this way, network devices do not need to obtain detailed routes for each device, which further saves the storage space of network devices and helps Improve the processing efficiency of network equipment.

In one embodiment, the network device advertises detailed routes and aggregation routes of the network device to neighbor devices of the same level connected to the network device. Network equipment advertises detailed routes to neighboring devices at the same level, so that neighboring devices at the same level can forward packets, and advertises aggregation routes to neighboring devices at the same level so that neighboring devices at the same level can be connected to neighboring devices at the next level Forward the message. As shown in Fig. 4, Fig. 4 is a schematic diagram based on Fig. 3. The neighboring devices of network device 1 also include neighboring devices of the same level, network device 6 and network device 7, and network device 1 can report to network device 6 and The network device 7 advertises route 1 and route 6 so that the network device 6 or the network device 7 can forward the message to the network device 1 through the address 1, and can forward the message to the network device 4 or the network device 5 through the address 6.

In addition, it should be noted that the neighbor devices of the network device can be determined in the following ways:

The network device obtains the message sent by the neighboring device; among them, the message is an OSPF protocol message or an IS-IS protocol message; the message carries a field used to indicate the level of the neighboring device; according to the message used to indicate The field of the device level of the neighboring device is used to obtain the level of the neighboring device. For example, if the level of the network device is L3, it can receive the OSPF protocol message 1 sent by the neighboring device. The network device can learn the neighbor device's level by analyzing the field used to indicate the level of the neighboring device in the message 1. The level is L4, so it can be known that the neighbor device of the network device is the network device of the next level.

In order to enable network equipment to better forward message information, the LSDB of the network equipment can store the routing information published by neighboring equipment, and store the default route advertised by the neighboring equipment connected to the network equipment in the first link database. In LSDB; store the detailed routes advertised by the next-level neighbor devices connected to the network device in the second link database LSDB; store the detailed routes advertised by the neighbor devices of the same level connected to the network device in the first link The database LSDB.

Schematically, as shown in Figure 5, the network device 1 in the figure is at the L3 layer, the neighbor devices of the upper layer include network device 2 and network device 3, and the neighbor devices of the next layer include network device 4 and network device 5, neighboring devices at the same level include network device 6 and network device 7. Network device 2 publishes detailed routing route 2 of network device 2 to network device 1, so that network device 1 forwards the message to network device 2 according to address 2, where the destination address corresponding to route 2 is address 2; network device 3 sends to the network device 1 Publish the detailed routing route 3 of network device 3 so that network device 1 forwards the message to network device 2 according to address 3. The destination address corresponding to route 3 is address 3; in addition, network device 2 and network device 3 are both forwarded to the network Device 1 advertises the default route route 0. The designated address corresponding to this route 0 is address 0. This address 0 is used to instruct network device 1 to forward packets to network devices that cannot be routed clearly through address 0; network devices 4-7 Then, all the detailed routes are released to the network device 1 as route 4, route 5, route 6, and route 7. The network device 1 may store Route 0, Route 2, Route 3, Route 6, and Route 7 in the first LSDB, and store Route 4 and Route 5 in the second LSDB. As shown in Table 1, the first LSDB of network device 1 stores the default route route 0 advertised by the neighboring device of the upper level, detailed routes route 2 and route 3 advertised by the neighboring device of the upper level, and neighbors of the same level. The detailed route route 6 and route 7 advertised by the device. The second LSDB stores detailed routing routes 4 and 5 published by neighboring devices of the next level. It is also possible to store route 0 and route 2 to route 7 in the first LSDB, and store route 4 and route 5 in the second LSDB, as shown in Table 2, in this way to avoid flooding of devices at the next level. Affect the forwarding of packets.

Table 1

网络设备1Network equipment 1	第一LSDBFirst LSDB	第二LSDBSecond LSDB
To	路由0、路由2、路由3、路由6、路由7Route 0, Route 2, Route 3, Route 6, Route 7	路由4、路由5Route 4, Route 5

Table 2

By storing different routing information in the first LSDB and the second LSDB, the network device directly searches for the routing information in the corresponding LSDB to forward the packet when forwarding the packet, thereby improving the efficiency of packet forwarding.

Based on the same technical concept, an embodiment of the present application also provides a network device, as shown in FIG. 6, including: a processing unit 61.

Among them, the processing unit 61 is used to publish the aggregation route to the neighbor devices of the upper level connected to the network device; and is used to publish the default route to the neighbor devices of the next level connected to the network device; where the level indicates the campus network The position of each device in the network topology; the aggregation route is the aggregation of the detailed routes received by the network device from the neighboring device of the next level connected to the network device. The default route indicates that the neighboring device of the next level is unsuccessful. When obtaining the route corresponding to the destination address, the packet is forwarded to the designated address corresponding to the default route.

In the embodiment of this application, the network device advertises the aggregation route to the neighbor device of the upper level connected to it, and sends the default route to the neighbor device of the next level connected to it. This method prevents the network device in the campus network from learning about the campus. In the case of detailed routing issued by all network devices at all levels in the network, network devices only need to learn the routing information issued by network devices at adjacent levels to forward messages across the entire network. This method reduces It also reduces the number of route announcements of network equipment, and on the other hand, it reduces the number of route learning of network equipment in the campus network. In this way, the network equipment does not need to obtain detailed routing information of each equipment, which further saves the storage space of network equipment. Helps improve the processing efficiency of network equipment.

In a possible implementation manner, the processor is also used to publish detailed routes and aggregation routes of the network device to neighboring devices of the same level connected to the network device.

In a possible implementation manner, the device further includes: a communication unit; wherein the communication unit is used to obtain a message sent by a neighboring device; wherein the message is an OSPF protocol message or a route from the intermediate system to the intermediate system ISIS Protocol message; the message carries a field used to indicate the level of the neighboring device; according to the field used to indicate the device level of the neighboring device in the message, the level of the neighboring device is obtained.

In a possible implementation manner, the device further includes: a storage unit; wherein the storage unit is configured to store the default route issued by the neighboring device connected to the network device in the first LSDB; The detailed route advertised by the neighboring device of the next level connected to the device is stored in the second LSDB; the detailed route advertised by the neighboring device of the same level connected to the network device is stored in the first LSDB.

Based on the same concept, as shown in FIG. 7, a communication device 700 provided for this application. Exemplarily, the communication device 700 may be a chip or a chip system. Optionally, the chip system in the embodiments of the present application may be composed of chips, or may include chips and other discrete devices.

The communication device 700 may include at least one processor 710, and the device 700 may also include at least one memory 720 for storing computer programs, program instructions, and/or data. The memory 720 and the processor 710 are coupled. The coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units or modules, and may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules. The processor 710 may operate in cooperation with the memory 720. The processor 710 may execute a computer program stored in the memory 720. Optionally, at least one of the at least one memory 720 may be included in the processor 710.

The communication device 700 may further include a transceiver 730, and the communication device 700 may exchange information with other devices through the transceiver 730. The transceiver 730 may be a circuit, a bus, a transceiver, or any other device that can be used for information exchange.

In a possible implementation manner, the communication device 700 may be applied to the aforementioned network equipment, and the specific communication device 700 may be the aforementioned network equipment, or a device capable of supporting the aforementioned network equipment to implement any of the foregoing embodiments. The memory 720 stores necessary computer programs, program instructions, and/or data to implement the functions of the network device in any of the foregoing embodiments. The processor 710 can execute the computer program stored in the memory 720 to complete the method in any of the foregoing embodiments.

The specific connection medium between the foregoing transceiver 730, the processor 710, and the memory 720 is not limited in the embodiment of the present application. In the embodiment of the present application, the memory 720, the processor 710, and the transceiver 730 are connected by a bus in FIG. 7. The bus is represented by a thick line in FIG. It is not limited. The bus can be divided into an address bus, a data bus, a control bus, and so on. For ease of presentation, only one thick line is used to represent in FIG. 7, but it does not mean that there is only one bus or one type of bus.

In the embodiments of the present application, the processor may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and may implement or Perform the methods, steps, and logical block diagrams disclosed in the embodiments of the present application. The general-purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor.

In the embodiment of the present application, the memory may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., or a volatile memory (volatile memory), for example Random-access memory (random-access memory, RAM). The memory may also be any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer, but is not limited to this. The memory in the embodiments of the present application may also be a circuit or any other device capable of implementing a storage function, for storing computer programs, program instructions and/or data.

Based on the above embodiment, referring to FIG. 8, an embodiment of the present application also provides another communication device 800, including: an interface circuit 810 and a processor 820;

The interface circuit 810 is configured to receive code instructions and transmit them to the processor 820;

The processor 820 is configured to run the code instructions to execute the method in any of the foregoing embodiments.

Based on the above embodiments, the embodiments of the present application also provide a readable storage medium that stores instructions, and when the instructions are executed, the method executed by the security detection device in any of the above embodiments is implemented . The readable storage medium may include: U disk, mobile hard disk, read-only memory, random access memory, magnetic disk or optical disk and other media that can store program codes.

Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, this application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

This application is described with reference to the flowchart and/or block diagram of the method, device (system), and computer program product according to the application. It should be understood that each process and/or block in the flowchart and/or block diagram, and the combination of processes and/or blocks in the flowchart and/or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device are generated for use It is a device that realizes the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device. The device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be loaded on a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to produce computer-implemented processing, so as to execute on the computer or other programmable device. The instructions provide steps for implementing functions specified in a flow or multiple flows in the flowchart and/or a block or multiple blocks in the block diagram.

Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, this application also intends to include these modifications and variations.

Claims

A method for issuing routes in a campus network is characterized in that it includes:

The network device advertises the aggregation route to the neighbor devices of the upper level connected to the network device; wherein the level indicates the position of each device in the campus network in the network topology; the aggregation route is for the network device Aggregation of detailed routes received from neighbor devices of the next level connected to the network device;

The network device advertises a default route to a neighbor device of the next level connected to the network device, wherein the default route instructs the neighbor device of the next level to successfully obtain the route corresponding to the destination address, The message is forwarded to the designated address corresponding to the default route.
The method according to claim 1, wherein the method further comprises:

The network device publishes the detailed route of the network device and the aggregation route to neighbor devices of the same level connected to the network device.
The method according to claim 2, wherein the neighbor devices of the network device are determined in the following manner:

The network device obtains the message sent by the neighbor device; wherein, the message is an Open Shortest Path First OSPF protocol message or an intermediate system to intermediate system IS-IS protocol message; the message carries There is a field for indicating the level of the neighboring device;

The network device obtains the level of the neighbor device according to the field used to indicate the device level of the neighbor device in the message.
The method according to claim 2 or 3, wherein the method further comprises:

The network device stores the default route advertised by the neighbor device of the upper level connected to the network device in the first link database LSDB;

The network device stores the detailed routes issued by the next-level neighbor devices connected to the network device in the second link database LSDB;

The network device stores the detailed routes issued by neighbor devices of the same level connected to the network device in the first link database LSDB.
A network device, characterized in that it comprises:

The processing unit is configured to issue an aggregation route to the neighbor devices of the upper level connected to the network device; wherein the level indicates the position of each device in the campus network in the network topology; the aggregation route is for all The aggregation of detailed routes received by the network device from the neighbor devices of the next level connected to the network device; and is used to publish the default route to the neighbor devices of the next level connected to the network device, where all The default route instructs the next-level neighbor device to forward the message to the designated address corresponding to the default route when it fails to obtain the route corresponding to the destination address.
The device according to claim 5, wherein the processing unit is further configured to publish the detailed route of the network device and the aggregation route to neighbor devices of the same level connected to the network device.
The device according to claim 6, wherein the device further comprises:

The communication unit is configured to obtain a message sent by the neighboring device; wherein the message is an OSPF protocol message or an intermediate system-to-intermediate system IS-IS protocol message; the message carries a message for indicating The field of the level of the neighboring device;

Acquire the hierarchy of the neighboring device according to the field used to indicate the device hierarchy of the neighboring device in the message.
The device according to claim 6 or 7, wherein the device further comprises:

The storage unit is configured to store the default route published by the neighbor device of the upper level connected to the network device in the first link database LSDB;

Store the detailed routes issued by the neighbor devices of the next level connected to the network device in the second link database LSDB;

The detailed routes issued by neighboring devices of the same level connected to the network device are stored in the first link database LSDB.
A communication device, characterized by comprising: a processor and a memory;

The memory stores a computer program;

The processor is configured to execute a computer program stored in the memory, so that the method according to any one of claims 1 to 4 is executed.
A communication device, characterized by comprising: a processor and an interface circuit;

The interface circuit is used to receive code instructions and transmit them to the processor;

The processor is configured to run the code instructions to execute the method according to any one of claims 1-4.
A computer-readable storage medium, characterized in that, computer-readable instructions are stored in the computer storage medium, and when the computer reads and executes the computer-readable instructions, the computer executes any one of claims 1-4 The method described in the item.