CN112019432B - Uplink input message forwarding system based on multiport binding - Google Patents
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Abstract
The invention discloses an uplink input message forwarding system based on multi-port binding, which relates to the technical field of data communication and comprises an aggregation message analysis module, a data aggregation control module, a message distribution module, a port state monitoring module and a memory device, wherein the memory device is used for caching a current uplink input message from the data aggregation control module and sending the current uplink input message and a current downlink output port number to the message distribution module under the condition that a current data output link is normal. The system can support 1024 input ports and 1024 output ports at maximum, automatically acquire the number of the ports existing in practical application, and carry out port binding by matching rules; the problem of overlong switching flow can be solved in the process of recovering service interruption, and the received fragment messages can be cached, so that the influence caused by service interruption is reduced by an elastic cache protection mechanism.
Description
Technical Field
The invention relates to the technical field of data communication, in particular to an uplink input message forwarding system based on multiport binding.
Background
In the field of data communication, with the continuous development of internet technology, the data transmission amount of data communication is larger and larger, and the bandwidth and throughput required by data communication are larger and larger. It is continuously pursued by technical personnel in the field of data communication to improve the bandwidth of data forwarding and the bandwidth utilization rate of a port in communication. In order to improve the message forwarding efficiency, data ports are often bundled in the prior art.
The port binding is a technology for binding a plurality of physical ports together and converging the physical ports into the same logical port for data forwarding, and the technology also supports a plurality of logical ports to perform data forwarding at the same time, namely N input physical ports are bound into M output logical interfaces for forwarding. If the input port has 2 ports with the speed of 100Mbps and 2 ports with the speed of 200Mbps, the two connections of 200Mbps and 400Mbps can be flexibly bound, or two connections of 300Mbps are both adopted.
In the process of port binding, the load sharing of the input link is realized, the output logic port link disperses the flow to different links, and the reliability of the network and the communication capacity of the links are improved.
However, the existing methods still have the following defects:
1) when the ports are bound, the fixed number of the ports is often adopted in the prior art, and the application has limitation;
2) in the process of message forwarding, when a data link fails, a link binding interface needs to be switched, and multiple negotiation operations are performed in the switching process, so that the switching process is too long, and the problem of too long service interruption time exists.
Disclosure of Invention
The present invention provides an uplink input packet forwarding system based on multi-port bundling, which can alleviate the above problems.
In order to alleviate the above problems, the technical scheme adopted by the invention is as follows:
an uplink input message forwarding system based on multiport binding comprises:
the system comprises a convergence message analysis module, a message forwarding module and a message forwarding module, wherein the convergence message analysis module is used for analyzing a current uplink input message to obtain a key MAC address and obtaining a current uplink input port number according to a PMR cache and the key MAC address, and the PMR cache records a one-to-one mapping relation between a plurality of uplink input port numbers and a plurality of MAC addresses;
the data aggregation control module is used for generating an aggregation calendar table according to a plurality of uplink input ports and a plurality of downlink output ports, updating the aggregation calendar table when current data output link abnormal information is received, and acquiring a current downlink output port number according to a latest aggregation calendar table and the current uplink input port number, wherein the aggregation calendar table records the one-to-one mapping relation between a plurality of port bundles and the plurality of downlink output ports, and the port bundles are formed by binding one or more uplink input ports;
a message distribution module, configured to distribute the current uplink input message to a current downlink output port according to the current downlink output port number when a current data output link is normal;
and the port state monitoring module is used for periodically confirming whether the current data output link is normal or not, and reporting the abnormal information of the current data output link to the data aggregation control module if the current data output link is abnormal.
And the memory device is used for caching the current uplink input message from the data aggregation control module and sending the current uplink input message and the current downlink output port number to the message distribution module under the condition that the current data output link is normal.
The technical effect of the scheme is as follows: the method can support 1024 input ports and 1024 output ports at maximum, automatically acquire the number of the ports existing in practical application, and perform port binding by matching rules; the problem of overlong switching flow can be solved in the process of recovering service interruption, and the received fragment messages can be cached, so that the influence caused by service interruption is reduced by an elastic cache protection mechanism.
Furthermore, for each uplink input port, a detection message needs to be sent to a device in communication connection with the port state monitoring module through the port state monitoring module, wherein the detection message includes an uplink input port number;
for each device in communication connection with the uplink input port, after receiving a detection message, sending an input side detection response message to the port state monitoring module, where the input side detection response message includes an MAC address, an uplink input port number corresponding to the input side detection response message, and link information between the input side detection response message and the corresponding uplink input port, and records a mapping result of the MAC address and the uplink input port number of the input side detection response message in the PMR cache;
for each downlink output port, a detection message is required to be sent to equipment in communication connection with the downlink output port through the port state monitoring module, wherein the detection message comprises a downlink output port number of the detection message;
after receiving the detection message, the device in communication connection with each downlink output port needs to send an output side detection response message to the port state monitoring module, where the output side detection response message includes its MAC address, its corresponding downlink output port number, and its link information with the corresponding downlink output port.
The technical effect of the scheme is as follows: by adopting the method of sending the detection message and feeding back the detection response message, the corresponding MAC address, the uplink port number, the downlink port number and the link information can be obtained actively.
Furthermore, for each uplink input port and downlink output port, the port status monitoring module needs to periodically send a detection message to the devices corresponding to the port status monitoring module and dynamically update the PMR cache and the aggregation calendar according to the received detection response message.
The technical effect of the scheme is as follows: the latest port state can be periodically acquired, whether the link is normal or not can be confirmed, and the port mapping relation can be timely updated according to the link state.
Furthermore, if the current data output link is in the link down state or the oscillation state, it indicates that it is abnormal.
The technical effect of the scheme is as follows: whether the data link is normal or not can be accurately judged.
Further, if the current data output link is not normal, the message distribution module suspends forwarding the current uplink input message from the memory device.
The technical effect of the scheme is as follows: preventing the message from being forwarded to an abnormal output link.
Further, for a certain port bundle, its bandwidth is not greater than that of its corresponding output logical port.
The technical effect of the scheme is as follows: the method can effectively prevent the packet loss condition in the message forwarding process.
Furthermore, if the mapping relationship between the uplink input port and the downlink output port needs to be configured forcibly, the aggregation calendar table is modified correspondingly through the control device.
The technical effect of the scheme is as follows: the method for modifying the mapping relation is simple and convenient.
Further, the data aggregation control module generates the aggregation calendar table according to port information of an uplink input port and a plurality of downlink output ports, where the port information includes port number information and port bandwidth information.
The technical effect of the technical scheme is as follows: according to the port bandwidth and the corresponding port number, port binding can be reasonably carried out.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, 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 needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a block diagram of an uplink input packet forwarding system based on multi-port bundling according to an embodiment of the present invention;
FIG. 2 is a diagram illustrating port bundling according to an embodiment of the present invention;
fig. 3 is a flowchart of forwarding an uplink input packet based on multi-port bundling according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of 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 present invention, 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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to fig. 2, an uplink input packet forwarding system based on multi-port bundling in this embodiment includes:
the system comprises a message aggregation analysis module, a message aggregation module and a message forwarding module, wherein the message aggregation analysis module is used for analyzing a current uplink input message to obtain a key MAC address, and obtaining a current uplink input port number according to a PMR cache and the key MAC address, and the PMR cache records a one-to-one mapping relation between a plurality of uplink input port numbers and a plurality of MAC addresses;
the data aggregation control module is used for generating an aggregation calendar table according to a plurality of uplink input ports and a plurality of downlink output ports, updating the aggregation calendar table when current data output link abnormal information is received, and acquiring a current downlink output port number according to a latest aggregation calendar table and a current uplink input port number, wherein the aggregation calendar table records a one-to-one mapping relation between a plurality of port bundles and the plurality of downlink output ports, and the port bundles are formed by binding one or more uplink input ports;
the message distribution module is used for distributing the current uplink input message to the current downlink output port according to the current downlink output port number under the condition that the current data output link is normal;
and the port state monitoring module is used for periodically confirming whether the current data output link is normal or not, and reporting the abnormal information of the current data output link to the data aggregation control module if the current data output link is abnormal.
And the memory device is used for caching the current uplink input message from the data aggregation control module and sending the current uplink input message and the current downlink output port number to the message distribution module under the condition that the current data output link is normal.
In this embodiment, when the current data output link is in the link down state or the oscillation state, the link is abnormal, and at this time, the abnormal link cannot be identified as a valid port and cannot perform the port binding operation. If the current data output link is abnormal, the message distribution module suspends forwarding the current uplink input message from the memory device.
In the uplink input packet forwarding system based on multi-port bundling according to this embodiment, before forwarding a packet, an input port link and an output port link need to be initialized to configure auto-negotiation attributes, rates, and the like of the links, so as to determine whether the links are in a link state. The table entry information and the memory device are initialized, the configuration of the previous table entry is cleared by initializing the table entry, the memory device can normally work only by the initialization process after the equipment is powered on, and meanwhile, preparation is made for interval division of the memory device.
In this embodiment, the device first obtains uplink and downlink port information, which includes the number N of valid uplink input ports, the rate of the uplink input ports, the number M of valid downlink output ports, and the rate of the downlink output ports.
The port state monitoring module needs to periodically send a detection message to the N uplink input port links, where the detection message includes an uplink input port number. After receiving the detection message, the device at the input end replies a detection response message to inform the device of the link information of the input port, wherein the detection response message comprises an uplink input port number, the MAC address of the device corresponding to the input end and the link information. Similarly, it is also necessary to send a detection message to the M downlink output port links, where the device at the output end receives and replies a detection response message, where the detection response message includes a downlink output port number, an MAC address of a device corresponding to the downlink output end, and link information of the link.
After the system receives the replied input end detection response message, the effective number of the uplink input ports can be obtained through the aggregation message analysis module, and the uplink input port number and the MAC address of the equipment corresponding to the uplink input port are analyzed. And the aggregation message analysis module performs address analysis and mapping operation on the uplink input port number and the MAC address of the uplink input port, and records the mapping result in the PMR cache. Meanwhile, the system can periodically send the detection message, update the latest mapping between the uplink input port number and the MAC address, and dynamically maintain the PMR cache. Similarly, after receiving the replied downlink output end detection response message, the system can obtain the effective number of downlink output ends, the number of downlink output ports, and the MAC address of the device corresponding to the downlink output end. And will carry on the mapping operation to the downstream output port number and downstream output port MAC address, and record and maintain and map to the polymerization calendar in the newest dynamically.
In this embodiment, the data aggregation control module needs to perform a port binding operation, bind a plurality of input ports into a port bundle according to a specific rule, perform one-to-one correspondence between the port bundle and the output logical port, and finally record a mapping result of the input port bundle and the output logical port in the aggregation calendar table. In the system, there are three implementation ways for the rule of binding the ports:
the first implementation is a fair allocation to implement the mapping relationship between the uplink input port and the downlink output port, and the allocation rule makes it easier to distribute the traffic uniformly to the output ports. In the implementation mode, the uplink input ports are sequentially connected to M bundled bundles, and port rate matching is carried out; if the total rate of the current uplink input port and the bundled input port bundle is greater than that of the output port, the current input port is not bundled into a port bundle, and the input port is matched with the total rate of the next input port bundle; otherwise, the current uplink input port is subjected to port binding operation. For example, the uplink input ports 1, 2, and 3 are sequentially bound with the port bundles connected to the downlink output ports 1, 2, and 3, and then the uplink input port 4 is bound, where the total rate of the uplink input ports 4 and 1 is 500Mbps, which is greater than the rate of the downlink output port 1, which is 300Mbps, then the uplink input ports 4 and 1 cannot be bound. And the total rate of the uplink input ports 4 and 2 is 500Mbps which is not greater than the rate of the downlink output port 2 of 600Mbps, the uplink input ports 4 and 2 can be subjected to port binding. By analogy, the uplink input ports 1 and 5, the uplink input ports 2 and 4, and the uplink input ports 3 and 6 may be port-bound and respectively forwarded from the downlink output ports 1, 2, and 3.
The second implementation mode is a best effort allocation mode to implement the mapping relationship between the uplink input physical port and the downlink output logical port, and the allocation rule is easier to improve the bandwidth utilization rate of the downlink output port. In the implementation mode, the uplink input ports are sequentially summed with the rates of other uplink input ports, and the summed rate is compared with the rate of the downlink output port, until the total rate of the uplink input ports is matched with the rate of the output port, the current uplink input ports are subjected to port binding, and the allocation of the next port bundle is switched. For example, the port binding operation is performed on the uplink input port 1, and the total rate of 400Mbps of the uplink input ports 1 and 2 is greater than 300Mbps of the downlink output port 1, so the port binding cannot be performed, and similarly, neither of the uplink input ports 1 and 3 nor of the uplink input ports 1 and 4 can be bound. The total rate of the uplink input ports 1 and 5 is 300Mbps, which is equal to 300Mbps of the downlink output port 1, and the uplink input ports 1 and 5 can perform port binding. By analogy, the uplink input ports 1 and 5 can be subjected to port binding, the uplink input ports 2, 3 and 6 can also be subjected to port binding, and the uplink input port 4 is independently mapped with one downlink output port and respectively forwarded from the downlink output ports 1, 3 and 2.
The third implementation mode is to forcibly configure the mapping relationship between the uplink input port and the downlink output port. In the system, a local interface LocalBus bus is connected with a CPU and other control devices, and in the implementation mode, the control devices can issue rules of port binding and mapping relation between input port bundles and output ports to a calendar aggregation table through the LocalBus bus. For example, the rule may configure the uplink input ports 1, 3, and 5 to perform port binding, and map to the downlink output port 2 to perform packet forwarding; the uplink input ports 2 and 4 are subjected to port binding and mapped to the downlink output port 3 for forwarding.
After the system completes the binding of the uplink input port and forms the port bundle, and the port bundle and the downlink output port are mapped, the service message can be sent.
Referring to fig. 3, after an uplink input message enters a system, an aggregation message analysis module starts to work, firstly, the message is analyzed, a key MAC address carried by the message, namely, an MAC address of an input port device, is extracted, the MAC address is used as a keyword to be matched in a PMR cache, a current uplink input port number can be obtained after a PMR cache rule is hit, and finally, the aggregation message analysis module sends the current uplink input port number and the uplink input message to a data aggregation control module.
In the data aggregation control module, the obtained current uplink input port number is used as an index address to match the aggregation calendar table, after a rule in the aggregation calendar table is hit, the current downlink output port number of the uplink input message to be forwarded can be obtained, and the current downlink output port number and the uplink input message are sent to the memory device.
In the message distribution module, if the current data output link is normal, the uplink input message and the current downlink output port number are read from the memory device, and the uplink input message is forwarded by the current corresponding downlink output port.
In this embodiment, the port state monitoring module may periodically send a detection message to obtain a state of a current data output link, and when the current data output link is abnormal, the port state monitoring module obtains an abnormal state of the link and reports the abnormality to the data aggregation control module; meanwhile, the message distribution module also suspends the message forwarding, and the message entering the system is cached in the memory device and is not read out temporarily;
the data aggregation control module needs to acquire the latest input/output port state at this time, re-binds the uplink input port according to the binding method, re-allocates the mapping relation between the port bundle and the downlink output port, and updates the aggregation calendar table; when the aggregation calendar is updated, the data aggregation control module sends a signal of updating the aggregation calendar to the message distribution module and directly transmits the newly determined downlink output port number to the message distribution module;
the message distribution module continuously reads the cached uplink input message and the cached downlink output port number from the memory device, compares the read downlink output port number with the downlink output port number directly from the data aggregation control module, and replaces the downlink output port number read from the memory device with the downlink output port number from the data aggregation control module;
and finally, the message distribution module forwards the uplink input message according to the obtained current downlink output port number, so that the system smoothly completes the switching operation of the output port, and the service interruption of the equipment when the link of the output port is abnormal is avoided.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. An uplink input message forwarding system based on multiport binding is characterized by comprising:
the system comprises a convergence message analysis module, a message forwarding module and a message forwarding module, wherein the convergence message analysis module is used for analyzing a current uplink input message to obtain a key MAC address and obtaining a current uplink input port number according to a PMR cache and the key MAC address, and the PMR cache records a one-to-one mapping relation between a plurality of uplink input port numbers and a plurality of MAC addresses;
the data aggregation control module is used for generating an aggregation calendar table according to a plurality of uplink input ports and a plurality of downlink output ports, updating the aggregation calendar table when current data output link abnormal information is received, and acquiring a current downlink output port number according to a latest aggregation calendar table and the current uplink input port number, wherein the aggregation calendar table records the one-to-one mapping relation between a plurality of port bundles and the plurality of downlink output ports, and the port bundles are formed by binding one or more uplink input ports;
a message distribution module, configured to distribute the current uplink input message to a current downlink output port according to the current downlink output port number when a current data output link is normal;
the port state monitoring module is used for periodically confirming whether the current data output link is normal or not, and reporting the abnormal information of the current data output link to the data aggregation control module if the current data output link is not normal;
and the memory device is used for caching the current uplink input message from the data aggregation control module and sending the current uplink input message and the current downlink output port number to the message distribution module under the condition that the current data output link is normal.
2. The message forwarding system of claim 1,
for each uplink input port, a detection message is required to be sent to equipment in communication connection with the uplink input port through the port state monitoring module, and the detection message comprises an uplink input port number;
for each device in communication connection with the uplink input port, after receiving a detection message, sending an input side detection response message to the port state monitoring module, where the input side detection response message includes an MAC address, an uplink input port number corresponding to the input side detection response message, and link information between the input side detection response message and the corresponding uplink input port, and records a mapping result of the MAC address and the uplink input port number of the input side detection response message in the PMR cache;
for each downlink output port, a detection message is required to be sent to equipment in communication connection with the downlink output port through the port state monitoring module, wherein the detection message comprises a downlink output port number of the detection message;
after receiving the detection message, the device in communication connection with each downlink output port needs to send an output side detection response message to the port state monitoring module, where the output side detection response message includes its MAC address, its corresponding downlink output port number, and its link information with the corresponding downlink output port.
3. The message forwarding system according to claim 2, wherein for each of the upstream input port and the downstream output port, the port status monitoring module needs to periodically send a probe message to the devices with their corresponding communication connections, and dynamically update the PMR cache and the aggregation calendar table according to the received probe response message.
4. The message forwarding system according to claim 3, wherein if the current data output link is in a link down state or an oscillation state, it indicates that it is abnormal.
5. The message forwarding system of claim 1 wherein the message distribution module suspends forwarding of the current uplink input message from the memory device if the current data output link is not normal.
6. The message forwarding system of claim 1, wherein for a port bundle, its bandwidth is not greater than the bandwidth of its corresponding egress logical port.
7. The message forwarding system according to claim 6, wherein if the mapping relationship between the uplink input port and the downlink output port needs to be configured forcibly, the aggregation calendar table is modified correspondingly by the control device.
8. The message forwarding system according to claim 1, wherein the data aggregation control module generates the aggregation calendar table according to port information of an uplink input port and a plurality of downlink output ports, and the port information includes port number information and port bandwidth information.
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