CN115333991B - Cross-device link aggregation method, device, system and computer readable storage medium - Google Patents
Cross-device link aggregation method, device, system and computer readable storage medium Download PDFInfo
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- CN115333991B CN115333991B CN202210969381.9A CN202210969381A CN115333991B CN 115333991 B CN115333991 B CN 115333991B CN 202210969381 A CN202210969381 A CN 202210969381A CN 115333991 B CN115333991 B CN 115333991B
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Abstract
The embodiment of the invention provides a cross-equipment link aggregation method, a device, a system and a computer storage medium, which belong to the technical field of communication, wherein the method is applied to link aggregation uplink equipment, the link aggregation uplink equipment is connected with an aggregation group consisting of a plurality of lower network equipment through an aggregation link consisting of a plurality of member links, and the method comprises the following steps: when the message type of the message to be processed is determined to be a protocol message, copying the message to be processed for each member link, and respectively transmitting the message to be processed to the lower network equipment corresponding to the member link through each member link, so that each lower network equipment obtains link synchronization information through the message to be processed, and data synchronization can be realized without running a protocol between all lower network equipment in an aggregation group, thereby ensuring normal realization of subsequent link transmission, further improving the compatibility of cross-equipment link aggregation, and reducing the realization cost of cross-equipment link aggregation.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, a system, and a computer readable storage medium for aggregating links across devices.
Background
Stacking and cross-device link aggregation groups (Multichassis Link Aggregation Group, M-LAG) are two lateral virtualization techniques that are currently in widespread use, logically enabling multiple communication devices to be virtualized as one device. Stacking refers to combining multiple devices that support stacking together, logically into a single unitary device. The user can view the plurality of devices as a single device for management and use. Thus, the number of ports and the switching capacity can be expanded by increasing the devices, and meanwhile, the reliability of the devices is enhanced by mutual backup among a plurality of devices. The M-LAG technology carries out link aggregation negotiation with the accessed device in the same state through two access switches, and the accessed device looks like establishing a link aggregation relation with one device. Reliability can be improved from the single board level to the device level by link aggregation across devices.
In practical networking applications, the two lateral virtualization technologies have the following disadvantages respectively:
the stacking technology has high implementation cost, a plurality of stacking cables are required to be configured, the expansion capability is poor, the failure of the main equipment can influence member equipment, the capability of a control surface is limited to the capability of the main equipment, and when more than three equipment are expanded, the original network architecture is required to be changed or equipment is required to be restarted, so that the existing service is influenced;
The peer-link line between the M-LAG devices needs to perform protocol message interaction and data traffic interaction at the same time, so that the configuration complexity is high, and abnormal traffic forwarding caused by asynchronous table entries is easy to generate.
Based on the foregoing, improvements are needed in the existing lateral virtualization technology.
Disclosure of Invention
Accordingly, an object of the present invention is to provide a method, apparatus, system, and computer readable storage medium for cross-device link aggregation, in which devices performing cross-device link aggregation can synchronize data of all network devices in an aggregation group without having the same model and function, so as to ensure normal implementation of subsequent link transmission of the cross-device link aggregation to a certain extent, improve compatibility of the cross-device link aggregation, and reduce implementation cost of the cross-device link aggregation.
In order to achieve the above object, the technical scheme adopted in the embodiment of the invention is as follows.
In a first aspect, an embodiment of the present invention provides a cross-device link aggregation method, which is applied to a link aggregation uplink device, where the link aggregation uplink device is connected to an aggregation group formed by a plurality of lower network devices through an aggregation link formed by a plurality of member links, and the method includes:
Determining the message type of the message to be processed;
when the message type is a protocol message, copying the message to be processed aiming at each member link;
and sending the message to be processed to the lower network equipment corresponding to the member links through each member link respectively, so that each lower network equipment obtains link synchronization information through the message to be processed, and the link information among the lower network equipment is consistent.
Further, the link aggregation uplink equipment is single communication equipment or virtualization equipment formed by at least two communication equipment through link aggregation; each communication device comprises a plurality of downlink member interfaces, each downlink network device comprises at least one aggregation member interface, and each member link is formed by connecting one downlink member interface with one aggregation member interface;
when the message to be processed is an ARP request message, the step of sending the message to be processed to a lower network device corresponding to the member links through each member link, so that each lower network device obtains link synchronization information through the message to be processed includes:
Respectively configuring the copied ARP request message to each downlink member interface of the link aggregation uplink equipment, and transmitting the ARP request message to the downlink network equipment corresponding to the member links through the member links corresponding to each downlink member interface so as to enable each downlink network equipment to generate ARP list items according to the member interface information and the logic interface information of the aggregation member interfaces of the lower network equipment;
and receiving and processing an ARP response message returned by each lower network device aiming at the ARP request message, and learning the ARP table entry in the ARP response message.
Further, when the message to be processed is an OSPF message, the step of sending the message to be processed to a lower network device corresponding to the member link through each member link, so that each lower network device obtains link synchronization information through the message to be processed, includes:
and respectively configuring the duplicated OSPF messages to each member link, and transmitting the messages to be processed to lower network equipment corresponding to the member links so as to promote each lower network equipment to establish OSPF neighbors with the link aggregation uplink equipment.
Further, the method further comprises:
when the message type of the message to be processed is a non-protocol message, determining a target member interface from all the downlink member interfaces based on the downlink member interfaces specified by the adjacency list of the message to be processed;
and sending the message to be processed to the aggregation group through a member link corresponding to the target member interface.
Further, the step of determining a target member interface from all the downlink member interfaces based on the downlink member interfaces specified by the adjacency list of the message to be processed includes:
if the message to be processed is a locally generated message, inquiring whether an interface field for designating a downlink member interface exists in the adjacency list, if so, taking the downlink member interface designated by the interface field in the adjacency list as a target member interface, and if not, taking a root port of the link aggregation uplink device as the target member interface;
if the message to be processed is a forwarding message, inquiring whether an interface field for designating a downlink member interface exists in an adjacent table, if so, taking the downlink member interface designated by the interface field in the adjacent table as a target member interface, and if not, determining the target member interface from all the downlink member interfaces without faults by utilizing a hash algorithm.
Further, the method further comprises:
when the message type is a non-protocol message, inquiring a next-hop address and a destination address from an adjacent table of the message to be processed, and judging whether the next-hop address is consistent with the destination address;
if yes, taking the downlink member interface designated by the interface field in the adjacency list as a target member interface;
if not, when the message to be processed is a locally generated message, the root port of the link aggregation uplink equipment is used as a target member interface, and when the message to be processed is a forwarding message, a hash algorithm is utilized to determine the target member interface from all the downlink member interfaces without faults.
Further, the method further comprises:
establishing a session between a downlink member interface and an aggregate member interface of each member link;
monitoring all the conversations in real time, and judging whether each member link is communicated or not according to the response condition of the conversations;
if the member links cannot be connected, the state identification of the downlink member interface of the member link is set to be invalid, and ARP (Address resolution protocol) table entries on the link aggregation uplink equipment are updated.
In a second aspect, an embodiment of the present invention provides a cross-device link aggregation system, including a link aggregation uplink device, and an aggregation group formed by a plurality of downlink network devices connected to a plurality of member links of the link aggregation uplink device;
The link aggregation uplink device is configured to implement the cross-device link aggregation method according to the first aspect;
and the aggregation group is used for receiving and processing the message to be processed sent by the link aggregation uplink equipment.
In a third aspect, an embodiment of the present invention provides an apparatus for providing link aggregation, which is applied to a link aggregation uplink device, where the link aggregation uplink device is connected to an aggregation group formed by a plurality of lower network devices through an aggregation link formed by a plurality of member links, and the cross-device link aggregation apparatus includes a processing module and a transmission module:
the processing module is used for determining the message type of the message to be processed, and copying the message to be processed for each member link when the message type is a protocol message;
the transmission module is configured to send the message to be processed to a lower network device corresponding to the member link through each member link, so that each lower network device obtains link synchronization information through the message to be processed, and thus the link information between the lower network devices is consistent.
In a fourth aspect, an embodiment of the present invention provides a storage medium having stored thereon a computer program which, when executed by a processor, implements a cross-device link aggregation method as described in the first aspect.
According to the cross-equipment link aggregation method, device, system and storage medium provided by the embodiment of the invention, when the message type of the message to be processed is determined to be the protocol message, the link aggregation uplink equipment copies the message to be processed in the number of parts matched with the number of member links so as to transmit the message to be processed to the lower network equipment corresponding to the member links through each member link, so that each lower network equipment of the aggregation group can obtain link synchronization information through the message to be processed, all network equipment for performing cross-equipment link aggregation can realize data synchronization without the need of having the same model and function, the subsequent link transmission of the cross-equipment link aggregation is ensured to be normally realized, the compatibility of the cross-equipment link aggregation is improved, and the configuration complexity and the realization cost for performing the cross-equipment link aggregation are reduced.
In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 shows a block schematic diagram of a cross-device link aggregation system according to an embodiment of the present invention.
Fig. 2 shows one of the schematic structural diagrams of the cross-device link aggregation system according to the embodiment of the present invention.
Fig. 3 shows one of flow diagrams of a cross-device link aggregation method according to an embodiment of the present invention.
Fig. 4 shows a schematic flow chart of a partial sub-step of step S105 in fig. 3.
Fig. 5 shows a second schematic structural diagram of a cross-device link aggregation system according to an embodiment of the present invention.
Fig. 6 shows a second flowchart of a cross-device link aggregation method according to an embodiment of the present invention.
Fig. 7 shows a third flowchart of a cross-device link aggregation method according to an embodiment of the present invention.
Fig. 8 is a block diagram of a cross-device link aggregation apparatus according to an embodiment of the present invention.
Fig. 9 shows a block schematic diagram of an electronic device according to an embodiment of the present invention.
Reference numerals: 100-a cross-device link aggregation system; 110-link aggregation uplink device; 120-polymerization group; 121-a lower network device; 130-cross-device link aggregation means; 140-a processing module; 150-a transmission module; 160-a detection module; 170-an electronic device.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.
It is noted that relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
In the prior art, the devices belonging to the cross-device link aggregation group are required to have the same model and function, so that the consistency of information among the devices is ensured by configuring related protocols, thereby greatly reducing the compatibility of the whole cross-device link aggregation group and improving the implementation cost. In addition, if data traffic is required to run between devices in the inter-device link aggregation group, configuration complexity is greatly increased if a protocol is to be run between devices.
Based on the above consideration, the embodiment of the present invention provides a cross-device link aggregation scheme, where devices performing cross-device link aggregation can synchronize data of all devices in an aggregation group without having the same model and function, so as to ensure normal implementation of subsequent link transmission of the cross-device link aggregation to a certain extent, improve compatibility of performing cross-device link aggregation, and reduce implementation cost of the cross-device link aggregation. Meanwhile, the configuration complexity of cross-device link aggregation can be reduced. Hereinafter, detailed description will be made.
In one embodiment, referring to fig. 1, a cross-device link aggregation system 100 is provided that includes a link aggregation uplink device 110 and an aggregation group 120 of a plurality of lower network devices 121 connected to a plurality of member links of the link aggregation uplink device 110. The plurality of member links constitute an aggregate link, and one member link connects one lower network device 121. There are at least two lower network devices 121, and a cross-device link aggregation relationship exists between the lower network devices 121.
The member link is a logical link formed by bundling a plurality of member links between the lower network device 121 and the link aggregation upper device 110 in the aggregation group 120, that is, an ethernet aggregation link includes a plurality of member links.
When the aggregation group 120 includes two lower network devices 121, in the cross-device link aggregation system 100, two member links respectively connected to the two lower network devices 121 may be bundled into one aggregation link. When the aggregation group 120 includes three lower network devices 121, three member links respectively connected to the three lower network devices 121 may be bundled into one aggregation link in the cross-device link aggregation system 100.
The link aggregation uplink device 110 may be a single communication device, or a virtualized device obtained by at least two communication devices through a stacking technology, or a virtualized device formed by at least two communication devices through link aggregation, or a device obtained by other virtual technologies. In this embodiment, there is no particular limitation.
The link aggregation uplink device 110 is configured to determine a message type of a message to be processed, and when the message type is a protocol message, copy the message to be processed for each member link, and send the message to be processed to the downlink network device 121 corresponding to the member link through each member link, so that each downlink network device 121 obtains link synchronization information through the message to be processed.
After receiving the message to be processed, the lower network device 121 processes and responds to the message to be processed, so that not only can the response message be returned, but also the configuration required by the message to be processed can be performed, and the message can be continuously forwarded to the lower network device, and meanwhile, the protocol information in the message to be processed can be learned. Thus, link information synchronization between each of the lower network devices 121 in the aggregation group 120 can be achieved, so that the link information of each of the lower network devices 121 is identical.
The message to be processed may be a message sent by the uplink device of the link aggregation uplink device 110, or a message generated locally by the link aggregation uplink device 110. The link synchronization information is used to reconcile link information between the lower network devices 121 in the aggregation group 120. In detail, in one embodiment, the link synchronization information is used to ensure protocol message information synchronization between the lower network devices 121 in the aggregation group 120.
In the above cross-device link aggregation system 100, through the interaction between the link aggregation uplink device and the aggregation group, each downlink network device of the aggregation group can obtain the link synchronization information through the message to be processed, and all devices in the aggregation group can realize data synchronization without having the same model and function, so that the subsequent link transmission of the cross-device link aggregation can be ensured to be normally realized to a certain extent, and the compatibility of the cross-device link aggregation is improved. Meanwhile, the configuration complexity of the cross-device link aggregation can be reduced, and the implementation cost of the cross-device link aggregation can be reduced.
The link aggregation control protocol (LACP protocol) is a control protocol for cross-device link aggregation for interacting information with a peer. After the LACP protocol is enabled by the port of the device, the port will announce its own system priority, system MAC address, port priority, port number and operation key to the opposite end through the sending link convergence control protocol data unit (lacnud). After the opposite end receives the information, the information is compared with the information of other ports to select the ports which can be converged, so that the opposite end can agree on whether the ports join or leave a dynamic convergence group.
Since the cross-device link aggregation runs on the lower network devices 121 in the aggregation group 120, in order to ensure that the link aggregation control protocol can be negotiated normally, the configuration is performed between the link aggregation upper device 110 in the cross-device link aggregation system 100 shown in fig. 1 and the lower network devices 121 in the aggregation group 120.
The configuration content comprises: the system IDs (system-IDs) of LACPs of all the lower network devices 121 in the aggregation group are configured to the same value; the aggregation member interfaces of all the lower network devices 121 in the aggregation group are configured with the same MAC address; the LACP priority configured on the link aggregation upper bound device 110 is higher than the LACP priority configured on all lower bound devices 121 in the aggregation group so that the link aggregation upper bound device 110 always acts as the root port decision maker.
The root port refers to a port selected when the link aggregation uplink device 110 sends a protocol packet to the aggregation group. In the prior art, a link aggregation uplink device generally sends a protocol message to an aggregation group through a root port.
With the above configuration, the link aggregation uplink device determines the root port from its own downlink member interface in real time according to the system priority, the system MAC address, the port priority, the port number and the operation key of the downlink network device in the aggregation group. In this embodiment, the downlink member interface refers to an interface used by the link aggregation uplink device to connect with the aggregation group.
In detail, as shown in fig. 2, if the port priority of the aggregation member interface gi0 on the lower network device a is higher than the port priority of the other aggregation member interfaces, the link aggregation uplink device 110 takes the lower member interface 1 connected to the aggregation member interface gi0 as the root port.
Based on the same principle, when the cross-device link aggregation is configured into an LACP dynamic mode, the Peer-link interfaces of two lower network devices in the aggregation group can also perform LACP protocol interaction, and the failure detection of the Peer-link interfaces can be realized through the LACP protocol keep-alive. When the cross-device link aggregation is configured into the LACP static mode, LACP protocol interaction is not performed, and at this time, only the MAC addresses of the aggregation member interfaces of all the lower network devices in the aggregation group are identical.
It should be appreciated that the above-described cross-device link aggregation system 100 may be part of a large communication system. For example, the cross-device link aggregation system 100 may be part of an express network, in detail, the aggregation group 120 may be a website device in the express network, and the link aggregation uplink device 110 may be a sorting and transferring device of a sorting and transferring center of a city in the express network.
In one embodiment, referring to fig. 3, a cross-device link aggregation method is provided, where the cross-device link aggregation method is applied to the link aggregation uplink device 110 in the cross-device link aggregation system 100 to illustrate the following steps.
S101, determining the message type of the message to be processed.
The message to be processed may be a protocol message or a non-protocol message generated locally by the link aggregation uplink device 110, or may be a protocol message or a non-protocol message sent by the uplink device of the link aggregation uplink device 110. Whether the message is a protocol message or not can be determined according to the message header information and the like of the message.
S103, when the message type is a protocol message, copying the message to be processed aiming at each member link.
The number of downlink member interfaces of the link aggregation uplink device 110 for connecting with the aggregation group 120 is equal to the number of member links, namely, each member link configures one message to be processed.
S105, respectively transmitting the message to be processed to the lower network equipment corresponding to the member links through each member link, so that each lower network equipment obtains link synchronization information through the message to be processed, and the link information among the lower network equipment is consistent.
Through the steps S101-S105, all devices in the cross-device link aggregation can realize data synchronization without the need of having the same model and function, and the subsequent link transmission of the cross-device link aggregation is ensured to be normally realized, so that the compatibility of the cross-device link aggregation is improved. Meanwhile, the configuration complexity of the cross-device link aggregation can be reduced, and the implementation cost of the cross-device link aggregation can be reduced.
As known from the above description of the cross-device link aggregation system 100, the link aggregation uplink device may be a single communication device, or may be a virtualized device formed by link aggregation of at least two communication devices, where each communication device may include multiple downlink member interfaces, and each downlink member device in the aggregation group includes at least one aggregation member interface, and each member link is formed by connecting one downlink member interface to one aggregation member interface.
Protocol messages include, but are not limited to: any protocol message such as ARP request message and OSPF message.
In the prior art, a protocol message is generally sent from a root port of a link aggregation uplink device to an aggregation group, so that the protocol message can only be sent to one downlink network device in the aggregation group. When the protocol message is an OSPF message and no protocol is configured among the lower network devices in the aggregation group, only one lower network device in the aggregation group can respond to the OSPF message and establish an OSPF neighbor with the link aggregation uplink device, so that the transmission of the subsequent protocol message is affected.
To overcome the above problems, link aggregation uplink devices are caused to establish OSPF neighbors with all the lower network devices in the aggregation group. When the message to be processed is an OSPF message, the step S105 may be implemented by: and respectively configuring the duplicated OSPF messages to each member link, and transmitting the messages to be processed to the lower network equipment corresponding to the member links so as to promote each lower network equipment and the link aggregation uplink equipment to establish OSPF neighbors. I.e. the above step is a sub-step of step S105.
After receiving the OSPF message from the aggregation member interface, the lower network device 121 generates an OSPF reply message, and returns the reply message from the aggregation member interface to the link aggregation uplink device 110, so as to complete the establishment of the OSPF neighbor.
Similarly, in the prior art, due to the limitation of the message sending mechanism, the link aggregation uplink device cannot learn the information of all the downlink network devices in the aggregation group. When the protocol message is an ARP request message and no protocol is configured between the next network devices in the aggregation group, the link aggregation uplink device can only learn the mapping relationship between the aggregation member interface of one next network device in the aggregation group and the address of the aggregation group, which will affect the transmission of the subsequent protocol message.
In order to solve the problem that the link aggregation uplink device cannot learn the relationship information between the aggregation member interfaces of all the lower network devices in the aggregation group and the addresses of the aggregation group, when the message to be processed is an ARP message, referring to fig. 4, the step S105 may be implemented by the following steps.
S1051, the duplicated ARP request message is respectively configured to each downlink member interface of the link aggregation uplink device, and the ARP request message is transmitted to the downlink network device corresponding to the member link through the member link corresponding to each downlink member interface, so that each downlink network device is caused to generate an ARP list item according to the member interface information and the logic interface information of the aggregation member interface of the downlink network device.
S1052, each lower network device receives and processes the ARP response message returned by the ARP request message, and learns the ARP list item in the ARP response message.
The member interface information comprises the serial number information of the aggregation member interface and the affiliated aggregation link information, and the logic interface information comprises the IP address and the MAC address of the aggregation group.
When an aggregation member interface of a lower network device in an aggregation group receives an ARP request message, the lower network device takes member interface information and logic interface information of the aggregation member interface as an ARP table entry according to a mapping relation, and after the ARP table entry is loaded into a message descriptor of an ARP response message, the ARP table entry is returned to a link aggregation uplink device from a member link corresponding to the aggregation member interface, so that the link aggregation uplink device obtains the ARP table entry of the aggregation member interface. It should be appreciated that the ARP entry is an interface index for the aggregation member interface.
After the link aggregation uplink equipment receives the ARP response message, an ARP module of the link aggregation uplink equipment learns ARP table items in the message descriptor and stores the ARP table items in an adjacency management table (adjacency table for short). Because the adjacency management table and the ARP module in the prior art do not store the logic interface information of the aggregation member interface, compared with the prior art, the invention expands the data structure of the ARP module to store the member interface information of the aggregation member port, and similarly, the adjacency management table expands the data structure to store the member interface information of the aggregation member port, and the improved ARP module and the adjacency management table are used for guiding the link aggregation to forward the message.
The ARP module and the adjacency management table can be used for aggregating member interface information member interface fields of member interfaces.
When the lower network device receives the ARP request message, the ARP table entry contained in the ARP request message is learned by the lower network device. In addition, if the aggregation group has an underhung device, the ARP request message may be further sent to the underhung device to obtain address information of the underhung device.
Through the steps S1051-S1052, the ARP module supplements the member interface field to record the member interface information of all the aggregation member interfaces in the aggregation group, that is, ARP entry changes. Along with the change of ARP list items, the embodiment of the invention also improves the sending flow of the non-protocol message in the cross-equipment link aggregation system so as to accurately send the non-protocol message to a destination.
In the prior art, the sending mode of the non-protocol message is as follows: and selecting a member interface from downlink member interfaces of the link aggregation uplink device by adopting a hash algorithm, and sending the member interface to the aggregation group through a link member interface corresponding to the selected member interface, which can cause partial packet loss or request failure.
Specifically, in the prior art, when a non-protocol message is sent, a HASH (HASH) algorithm in a load balancing algorithm is utilized for a forwarded non-protocol message, one interface is selected from downlink member interfaces of a link aggregation uplink device to send, and a ping request message of a local machine is generally sent out from a root port. However, in the networking environment where cross-device link aggregation is performed, if the message is still sent in the above manner, a problem of packet loss or failure of the ping request may be caused.
As shown in fig. 5, the lower network device B is connected to a 100.1.1.0/24 network, the lower network device C is connected to a 100.2.1.0/24 network, and when the link aggregation upper network device a receives a message addressed to the 100.1.1.0/24 network, the message is forwarded from the lower member interface 1, so that the message can be guaranteed to be normally delivered to a destination. Similarly, messages arriving on the 100.2.1.0/24 network are only forwarded from the downstream member interface 1 to ensure proper delivery to the destination.
In order to solve the problem of packet loss or ping request failure caused by the original packet transmission mode in the networking environment of cross-device link aggregation, referring to fig. 6, the cross-device link aggregation method provided by the embodiment of the invention further includes the following steps.
S102, when the message type of the message to be processed is a non-protocol message, determining a target member interface from all the downlink member interfaces based on the downlink member interfaces specified by the adjacency list of the message to be processed.
For a message with an explicit destination, an interface field is added to an adjacency list in the message to be processed, where the interface field is used to specify a downlink member interface, and the specified downlink member interface is related to the specified destination, that is, the downlink member interface is an aggregation interface that needs to be passed through to reach the destination.
Because the message to be processed comprises a local message and a forwarding message, two sending mechanisms are configured to realize the determination of the target member interface from all the downlink member interfaces based on the downlink member interfaces specified by the adjacency list of the message to be processed.
If the message to be processed is a locally generated message, a local mechanism (based-local) is adopted, including: and inquiring whether an interface field for designating the downlink member interface exists in the adjacent table, if so, taking the downlink member interface designated by the interface field in the adjacent table as a target member interface, and if not, taking the root port of the link aggregation uplink device as the target member interface.
If the message to be processed is a forwarding message, a forwarding mechanism (based-forward) is adopted, including: if the message to be processed is a forwarding message, inquiring whether an interface field for designating a downlink member interface exists in the adjacency list;
if yes, taking the downlink member interface designated by the interface field in the adjacency list as a target member interface;
if not, determining a target member interface from all the fault-free downlink member interfaces by utilizing a hash algorithm.
The hash algorithm refers to a hash algorithm in a load balancing algorithm. It should be understood that the hash algorithm may be replaced with other load balancing algorithms, which are not the only implementations, and the present embodiment is not limited solely.
In one embodiment, the ARP table entry of the ARP module of the link aggregation uplink device further records the active status of each aggregation member interface of the downlink network device aggregated across the device link, i.e. inactive (failed) or active (no failed).
It should be appreciated that the drop member interface specified by the interface field in the adjacency table may be in an inactive state. After the step of using the downlink member interface specified by the interface field in the adjacency table as the target member interface, the method further includes: and querying ARP (address resolution protocol) table entries of link aggregation uplink equipment, and determining a target member interface from all fault-free downlink member interfaces by adopting a hash algorithm when the state identification of the downlink member interface designated by an interface field in an adjacency table is invalid.
S104, the message to be processed is sent to the aggregation group through the member links corresponding to the target member interfaces.
Through the steps S102-S104, the message with definite purpose can be accurately sent to the destination, and the situation of packet loss or ping request failure can be reduced.
In another embodiment, when the message type of the message to be processed is a non-protocol message, the invention also provides a message sending mode, and the message sending mode can also improve the problem of packet loss or ping request failure caused by the original message sending mode in a networking environment of cross-equipment link aggregation.
The message sending mode, which is a destination sending mechanism (based-destination), comprises: inquiring a next-hop address and a destination address from an adjacent table of the message to be processed, and judging whether the next-hop address is consistent with the destination address; if the interface fields in the adjacency list are consistent, taking the downlink member interface designated by the interface fields in the adjacency list as a target member interface; if the message to be processed is a message generated locally, the root port of the link aggregation uplink equipment is used as a target member interface, and if the message to be processed is a forwarding message, a hash algorithm is utilized to determine the target member interface from all the downlink member interfaces without faults.
Similarly, after the step of setting the downlink member interface specified by the interface field in the adjacency table as the target member interface, the method further includes: and querying ARP (address resolution protocol) table entries of link aggregation uplink equipment, and determining a target member interface from all fault-free downlink member interfaces by adopting a hash algorithm when the state identification of the downlink member interface designated by an interface field in an adjacency table is invalid.
The local mechanism (based-local), the forwarding mechanism (based-forward) and the destination sending mechanism (based-destination) may be configured, or may be configured alternatively or alternatively according to actual requirements, which is not limited in this embodiment.
In the above-mentioned cross-device link aggregation method, when the message is transmitted and received in the link aggregation uplink device and the cross-device link aggregation, the validity (no fault) and invalidity (fault or down) of the member links have an important influence on the smooth transmission and reception of the message. Therefore, in order to quickly acquire the condition of the member link (i.e. whether the downlink member interface and the aggregation member interface are faulty), referring to fig. 7, the cross-device link aggregation method provided by the embodiment of the present invention further includes the following steps.
S106, establishing a session between the downlink member interface and the aggregation member interface of each member link.
And S107, monitoring all the sessions in real time, and judging whether each member link is connected or not according to the response condition of the session.
In detail, a bidirectional forwarding detection (Bidirectional Forwarding Detection, BFD) session is configured between the downstream member interface and the aggregate member interface of a member link, so that the session on the member link may handshake, if the handshake is successful, indicating that the member link has no failure, otherwise, there is a failure.
In fig. 5, when the ethernet aggregation link (including two member links) of the link aggregation uplink device a configures BFD, 2 BFD sessions need to be configured simultaneously, and the destination IP addresses are designated as the aggregation interface IP addresses of the lower network device B and the lower network device C, respectively. The lower network device B and the lower network device C also configure BFD sessions under the aggregation interface, and after configuration, a BFD session is created for each member link to perform fault detection.
After a line failure between the downstream network device B and the downstream network device C, the BFD session may also be detected without the member interface DOWN. When all member links between the downlink network device B and the downlink network device C are invalid, all aggregation member interfaces are set to be in an invalid state on the downlink network device B, and meanwhile, the peer-link interface between the downlink network device B and the downlink network device C is DOWN by linkage, so that the downlink network device C cannot send messages from the peer-link interface. If the peer-link interface is not dropped by DOWN, the lower network device C will continue to send the message from the peer-link, and the lower network device B has no effective member interface, so that the message will be discarded.
S108, if the member links cannot be connected, the state identification of the downlink member interface of the member link is set to be invalid, and ARP (Address resolution protocol) table entries on the link aggregation uplink equipment are updated.
Through the steps S106-S108, invalid member links and member interfaces can be detected in time, so that the message is prevented from being sent to the invalid member interfaces to a certain extent, and the message is prevented from being lost or failed to be sent.
The cross-equipment link aggregation method provided by the embodiment of the invention can ensure the normal operation of various protocols in the cross-equipment link aggregation system when protocols do not run among the lower network equipment in the aggregation group. Meanwhile, the types and functions of two devices which do not require cross-device link aggregation are identical, any two devices can do cross-device link aggregation, any high-low end device can support cross-device link aggregation, compatibility of the cross-device link aggregation is greatly improved, and implementation cost of the cross-device link aggregation is reduced.
Based on the concept of the above-mentioned cross-device link aggregation method, referring to fig. 8, in an embodiment, the present invention further provides a cross-device link aggregation apparatus 130, which is applied to the link aggregation uplink device 110 in the cross-device link aggregation system 100 provided in the above-mentioned embodiment, where the cross-device link aggregation apparatus 130 includes a processing module 140 and a transmission module 150.
And the processing module 140 is configured to determine a message type of the message to be processed, and copy the message to be processed for each member link when the message type is a protocol message.
And the transmission module 150 is configured to send the to-be-processed message to the lower network devices corresponding to the member links through each member link, so that each lower network device obtains link synchronization information through the to-be-processed message, and thus the link information among the lower network devices is consistent.
Further, the cross-device link aggregation apparatus 130 may further include a detection module 160 configured to:
establishing a session between a downlink member interface and an aggregate member interface of each member link;
monitoring all the conversations in real time, and judging whether each member link is connected or not according to the response condition of the conversations; if the member links cannot be connected, the state identification of the downlink member interface of the member link is set to be invalid, and ARP (address resolution protocol) table entries on the link aggregation uplink equipment are updated.
Based on the cross-device link aggregation device 130, all the downlink network devices in the aggregation group can realize data synchronization without the need of the same model and function of the devices of the cross-device link, and the normal realization of the subsequent link transmission of the cross-device link aggregation is ensured, so that the compatibility of the cross-device link aggregation is improved. Meanwhile, the configuration complexity of the cross-device link aggregation can be reduced, and the implementation cost of the cross-device link aggregation is reduced.
The specific limitation of the cross-device link aggregation apparatus 130 may be referred to above as limitation of the test case conversion method, and will not be described herein. The various modules in the above-described cross-device link aggregation apparatus 130 may be implemented in whole or in part by software, hardware, and combinations thereof.
When the link aggregation uplink device 110 is a communication device in a physical sense, the above modules may be embedded in hardware or independent from a processor in the communication device, or may be stored in a memory of the communication device in a software form, so that the processor invokes and executes operations corresponding to the above modules.
When the link aggregation uplink device 110 is a virtualized device formed by virtualizing multiple communication devices, the above modules may be embedded in a processor in each communication device in a hardware form or independent of the processor in each communication device, or may be stored in a memory of each physical device in a software form, so that the processor may call and execute operations corresponding to the above modules.
In one embodiment, an electronic device 170 is provided, the internal structure of which may be as shown in FIG. 9. The electronic device 170 comprises a processor, a memory, a communication interface, a display screen and input means connected by a system bus. Wherein the processor of the electronic device 170 is configured to provide computing and control capabilities. The memory of the communication device includes a non-volatile storage medium, an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The communication interface of the electronic device 170 is used for performing wired or wireless communication with an external terminal, where the wireless communication may be implemented through WIFI, an operator network, near Field Communication (NFC), or other technologies. The computer program when executed by a processor implements a cross-device link aggregation method.
It will be appreciated by those skilled in the art that the structure shown in fig. 9 is merely a block diagram of a portion of the structure associated with the present inventive arrangements and is not limiting of the electronic device 170 to which the present inventive arrangements are applied, and that a particular electronic device 170 may include more or fewer components than shown in fig. 9, or may combine certain components, or have a different arrangement of components.
In one embodiment, the cross-device link aggregation apparatus 130 provided by the present invention may be implemented in the form of a computer program that is executable on an electronic device 170 as shown in fig. 9. The memory of the electronic device 170 may store various program modules that make up the cross-device link aggregation apparatus 130, such as the processing module 140 and the transmission module 150 shown in fig. 8. The computer program of each program module causes a processor to perform the steps described in the present specification as applied to a cross-device link aggregation method.
For example, the electronic device 170 shown in fig. 9 may perform steps S101-S103 by the processing module 140 in the cross-device link aggregation apparatus 130 as shown in fig. 8. The electronic device 170 may perform step S105 through the transmission module 150.
In one embodiment, there is provided an electronic device 170 comprising a memory storing a computer program and a processor that when executing the computer program performs the steps of: determining the message type of the message to be processed, and copying the message to be processed aiming at each member link when the message type is a protocol message; and sending the message to be processed to the lower network equipment corresponding to the member links through each member link respectively, so that each lower network equipment obtains link synchronization information through the message to be processed, and the link information among the lower network equipment is consistent.
In one embodiment, a computer readable storage medium is provided having a computer program stored thereon, which when executed by a processor, performs the steps of: determining the message type of the message to be processed, and copying the message to be processed aiming at each member link when the message type is a protocol message; and sending the message to be processed to the lower network equipment corresponding to the member links through each member link respectively, so that each lower network equipment obtains link synchronization information through the message to be processed, and the link information among the lower network equipment is consistent.
In the several embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other manners. The apparatus embodiments described above are merely illustrative, for example, of the flowcharts and block diagrams in the figures that illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, functional modules in the embodiments of the present invention may be integrated together to form a single part, or each module may exist alone, or two or more modules may be integrated to form a single part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A cross-device link aggregation method, applied to a link aggregation uplink device, the link aggregation uplink device being connected to an aggregation group consisting of a plurality of lower network devices through an aggregation link consisting of a plurality of member links, the method comprising:
determining the message type of a message to be processed;
when the message type is a protocol message, copying the message to be processed aiming at each member link;
and sending the message to be processed to the lower network equipment corresponding to the member links through each member link respectively, so that each lower network equipment obtains link synchronization information through the message to be processed, and the link information among the lower network equipment is consistent.
2. The cross-device link aggregation method according to claim 1, wherein the link aggregation uplink device is a single communication device or a virtualized device composed of at least two communication devices through link aggregation; each communication device comprises a plurality of downlink member interfaces, each downlink network device comprises at least one aggregation member interface, and each member link is formed by connecting one downlink member interface with one aggregation member interface;
When the message to be processed is an ARP request message, the step of sending the message to be processed to a lower network device corresponding to the member links through each member link, so that each lower network device obtains link synchronization information through the message to be processed includes:
respectively configuring the copied ARP request message to each downlink member interface of the link aggregation uplink equipment, and transmitting the ARP request message to the downlink network equipment corresponding to the member links through the member links corresponding to each downlink member interface so as to enable each downlink network equipment to generate ARP list items according to the member interface information and the logic interface information of the aggregation member interfaces of the lower network equipment;
and receiving and processing an ARP response message returned by each lower network device aiming at the ARP request message, and learning the ARP table entry in the ARP response message.
3. The method for aggregating links across devices according to claim 1, wherein when the message to be processed is an OSPF message, the step of sending the message to be processed to a lower network device corresponding to the member link through each member link, so that each lower network device obtains link synchronization information through the message to be processed, includes:
And respectively configuring the duplicated OSPF messages to each member link, and transmitting the messages to be processed to lower network equipment corresponding to the member links so as to promote each lower network equipment to establish OSPF neighbors with the link aggregation uplink equipment.
4. The cross-device link aggregation method of claim 2, wherein the method further comprises:
when the message type of the message to be processed is a non-protocol message, determining a target member interface from all the downlink member interfaces based on the downlink member interfaces specified by the adjacency list of the message to be processed;
and sending the message to be processed to the aggregation group through a member link corresponding to the target member interface.
5. The method of cross-device link aggregation according to claim 4, wherein the step of determining a target member interface from all the downlink member interfaces based on the downlink member interfaces specified by the adjacency list of the message to be processed includes:
if the message to be processed is a locally generated message, inquiring whether an interface field for designating a downlink member interface exists in the adjacency list, if so, taking the downlink member interface designated by the interface field in the adjacency list as a target member interface, and if not, taking a root port of the link aggregation uplink device as the target member interface;
If the message to be processed is a forwarding message, inquiring whether an interface field for designating a downlink member interface exists in an adjacent table, if so, taking the downlink member interface designated by the interface field in the adjacent table as a target member interface, and if not, determining the target member interface from all the downlink member interfaces without faults by utilizing a hash algorithm.
6. The cross-device link aggregation method of claim 4, wherein the method further comprises:
when the message type is a non-protocol message, inquiring a next-hop address and a destination address from an adjacent table of the message to be processed, and judging whether the next-hop address is consistent with the destination address;
if yes, taking the downlink member interface designated by the interface field in the adjacency list as a target member interface;
if not, when the message to be processed is a locally generated message, the root port of the link aggregation uplink equipment is used as a target member interface, and when the message to be processed is a forwarding message, a hash algorithm is utilized to determine the target member interface from all the downlink member interfaces without faults.
7. The cross-device link aggregation method of claim 2, wherein the method further comprises:
Establishing a session between a downlink member interface and an aggregate member interface of each member link;
monitoring all the conversations in real time, and judging whether each member link is communicated or not according to the response condition of the conversations;
if the member links cannot be connected, the state identification of the downlink member interface of the member link is set to be invalid, and ARP (Address resolution protocol) table entries on the link aggregation uplink equipment are updated.
8. The cross-equipment link aggregation system is characterized by comprising link aggregation uplink equipment and an aggregation group formed by a plurality of lower network equipment connected with a plurality of member links of the link aggregation uplink equipment;
the link aggregation uplink device, configured to implement the cross-device link aggregation method according to any one of claims 1 to 7;
and the aggregation group is used for receiving and processing the message to be processed sent by the link aggregation uplink equipment.
9. A cross-device link aggregation apparatus, applied to a link aggregation uplink device, where the link aggregation uplink device is connected to an aggregation group formed by a plurality of lower network devices through an aggregation link formed by a plurality of member links, the cross-device link aggregation apparatus includes a processing module and a transmission module:
The processing module is used for determining the message type of the message to be processed, and copying the message to be processed according to each member link when the message type is a protocol message;
the transmission module is configured to send the message to be processed to a lower network device corresponding to the member link through each member link, so that each lower network device obtains link synchronization information through the message to be processed, and thus the link information between the lower network devices is consistent.
10. A computer readable storage medium having stored thereon a computer program, which when executed by a processor implements the cross-device link aggregation method of any one of claims 1 to 7.
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