CN105991448B - Neighbor discovery method and device - Google Patents
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Abstract
The invention provides a neighbor discovery method, which comprises the following steps: the first butt-joint equipment encapsulates a high-level data link control (HDLC) protocol message; the HDLC protocol message carries local information and remote information of first butt joint equipment, and the local information and the remote information of the first butt joint equipment are used for neighbor judgment of the second butt joint equipment; and the first docking equipment sends the HDLC protocol message to second docking equipment. The scheme solves the problem that neighbors cannot be found by expanding the standard HDLC protocol message encapsulation format, and effectively avoids the problem that the service of the whole aggregation interface is interrupted due to single-pass or cross connection errors of member links.
Description
Technical Field
The invention relates to the field of data communication, in particular to a neighbor discovery method and a neighbor discovery device.
Background
With the development of Data Link technology, HDLC (High-Level Data Link Control) technology is widely applied to point-to-point High-speed links. Because the HDLC protocol is complex, the HDLC protocol is usually used in the industry, and the HDLC protocol is a bit-oriented synchronous data control protocol, and is a simplified HDLC protocol, and negotiations are performed only by sending a HELLO packet (a broadcast packet whose protocol is SLARP).
In order to improve the communication capacity of the link, a plurality of ports (such as POS ports) based on HDLC encapsulation need to be bundled into one aggregation port, which is called a POSGROUP interface, and the total bandwidth of the POSGROUP interface is the sum of the bandwidths of the members, and by this aggregation mode, the bandwidth of the interface can be increased; meanwhile, load sharing can be realized (the POSGROUP interface disperses the flow to different links and finally reaches a unified destination, so that flow blockage caused by the flow all going through the same path can be avoided; and the reliability of the link can be improved (in the POSGROUP port, if the state of a certain member port is Down, the flow can be transmitted by other interfaces).
However, the HDLC protocol is a unidirectional control protocol, and does not have the capability of discovering neighbors, and in practical applications, link single-pass is often caused by transmission problems between point-to-point devices, or because an operator makes optical fiber cross-connect errors, which may cause transmission problems of service interruption of the whole aggregation port, and affect service usage, a related processing method needs to be considered.
The invention content is as follows:
the invention provides a neighbor discovery method and a neighbor discovery device, which aim to solve the problem that a neighbor cannot be discovered.
In order to solve the above technical problem, the present invention provides a method for neighbor discovery, including:
the first butt-joint equipment encapsulates a high-level data link control (HDLC) protocol message; the HDLC protocol message carries local information and remote information of first butt joint equipment, and the local information and the remote information of the first butt joint equipment are used for neighbor judgment of the second butt joint equipment;
and the first docking equipment sends the HDLC protocol message to second docking equipment.
Preferably, the first and second electrodes are formed of a metal,
the step of encapsulating the HDLC protocol message by the first docking device comprises the following steps:
manually configuring the local information and the remote information of the first docking equipment in the HDLC protocol message, or configuring the local information and the remote information of the first docking equipment in the HDLC protocol message in a self-learning manner.
Preferably, the first and second electrodes are formed of a metal,
the manually configuring the local information and the remote information of the first docking device in the HDLC protocol message, or the self-learning configuring the local information and the remote information of the first docking device in the HDLC protocol message includes:
when the local information of the first docking equipment and the remote information of the first docking equipment in the HDLC protocol message are manually configured, the local information of the first docking equipment is configured local information, and the remote information of the first docking equipment is configured remote information;
when the first docking equipment local information and the first docking equipment remote information in the HDLC protocol message are configured in a self-learning mode, the first docking equipment local information is default local information, and the first docking equipment remote information is self-learned remote information or 0.
The invention also provides a neighbor discovery method, which comprises the following steps:
the method comprises the steps that a second docking device receives a high-level data link control (HDLC) protocol message sent by a first docking device, wherein the HDLC protocol message carries local information and remote information of the first docking device;
and the second docking equipment judges whether the first docking equipment is a neighbor of the second docking equipment or not according to the HDLC protocol message.
Preferably, the first and second electrodes are formed of a metal,
the second docking device determining whether the first docking device is a neighbor of the second docking device according to the HDLC protocol packet includes:
when the second docking equipment does not store the remote information of the second docking equipment, storing the local information of the first docking equipment; and the second docking equipment judges whether the remote information of the first docking equipment carried by the HDLC protocol message is consistent with the local information of the second docking equipment stored by the second docking equipment, and if so, the first docking equipment is a neighbor of the second docking equipment.
Preferably, the first and second electrodes are formed of a metal,
the second docking device determining whether the first docking device is a neighbor of the second docking device according to the HDLC protocol packet includes:
when the second docking device stores remote information of the second docking device, the second docking device judges whether the local information of the first docking device carried in the HDLC protocol message is consistent with the remote information of the second docking device stored by the second docking device, and if so, the first docking device is a neighbor of the second docking device.
The invention also provides a neighbor discovery device, which is arranged on the first docking equipment, and comprises:
the encapsulation module is used for encapsulating the HDLC protocol message; the HDLC protocol message carries local information and remote information of first butt joint equipment, and the local information and the remote information of the first butt joint equipment are used for neighbor judgment of the second butt joint equipment;
and the sending module is used for sending the HDLC protocol message to the second docking equipment.
Preferably, the first and second electrodes are formed of a metal,
the encapsulation module is used for encapsulating the HDLC protocol message of the high-level data link control, and comprises the following steps:
manually configuring the local information and the remote information of the first docking equipment in the HDLC protocol message, or configuring the local information and the remote information of the first docking equipment in the HDLC protocol message in a self-learning manner.
Preferably, the first and second electrodes are formed of a metal,
the manually configuring the local information of the first docking device and the remote information of the first docking device in the HDLC protocol message, or the self-learning configuring the local information of the first docking device and the remote information of the first docking device in the HDLC protocol message means:
when the local information of the first docking equipment and the remote information of the first docking equipment in the HDLC protocol message are manually configured, the local information of the first docking equipment is configured local information, and the remote information of the first docking equipment is configured remote information;
when the first docking equipment local information and the first docking equipment remote information in the HDLC protocol message are configured in a self-learning mode, the first docking equipment local information is default local information, and the first docking equipment remote information is self-learned remote information or 0.
The invention also provides a neighbor discovery device, which is arranged on the second docking equipment, and comprises:
the HDLC protocol message carries the local information of the first docking equipment and the remote information of the first docking equipment;
and the judging module is used for judging whether the first docking equipment is a neighbor of the second docking equipment according to the HDLC protocol message.
Preferably, the first and second electrodes are formed of a metal,
the judging module is configured to judge whether the first docking device is a neighbor of the second docking device according to the HDLC protocol packet, including:
when the second docking equipment does not store the remote information of the second docking equipment, storing the local information of the first docking equipment; and the second docking equipment judges whether the remote information of the first docking equipment carried by the HDLC protocol message is consistent with the local information of the second docking equipment stored by the second docking equipment, and if so, the first docking equipment is a neighbor of the second docking equipment.
Preferably, the first and second electrodes are formed of a metal,
the judging module is configured to judge whether the first docking device is a neighbor of the second docking device according to the HDLC protocol packet, including:
when the second docking device stores remote information of the second docking device, the second docking device judges whether the local information of the first docking device carried in the HDLC protocol message is consistent with the remote information of the second docking device stored by the second docking device, and if so, the first docking device is a neighbor of the second docking device.
The scheme solves the problem that neighbors cannot be found by expanding the standard HDLC protocol message encapsulation format, and effectively avoids the problem that the service of the whole aggregation interface is interrupted due to single-pass or cross connection errors of member links.
Drawings
FIG. 1 is a flowchart of a method for neighbor discovery according to an embodiment of the present invention;
FIG. 2 is another flowchart of a method for neighbor discovery according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an apparatus for neighbor discovery according to a first embodiment of the present invention;
fig. 4 is another schematic structural diagram of an apparatus for neighbor discovery according to an embodiment of the present invention;
FIG. 5 is a flowchart of a method for neighbor discovery according to a second embodiment of the present invention;
FIG. 6 is a diagram illustrating a second embodiment of the present invention;
fig. 7 is a schematic diagram of a protocol packet format in the second embodiment of the present invention;
FIG. 8 is a diagram of self-learning message formats of home information and remote information in a second embodiment of the present invention;
fig. 9 is a flowchart of sending an HDLC protocol packet in the second embodiment of the present invention;
fig. 10 is a flow chart of receiving an HDLC protocol challenge in accordance with a second embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
Example one
As shown in fig. 1, the technical problem to be solved by the present invention is to provide a neighbor discovery method, which has solved the problem that a neighbor cannot be discovered, so as to avoid the transmission problem of service interruption of the whole aggregation interface caused by a single-pass or cross-connect error of a member link in an HDLC aggregation link scenario.
In order to solve the above technical problem, the present invention provides a method for neighbor discovery, including:
step S101: the first butt-joint equipment encapsulates a high-level data link control (HDLC) protocol message; the HDLC protocol message carries local information and remote information of first butt joint equipment, and the local information and the remote information of the first butt joint equipment are used for neighbor judgment of second butt joint equipment;
step S102: and the first docking equipment sends the HDLC protocol message to the second docking equipment.
Wherein, the step of encapsulating the HDLC protocol packet by the first docking device specifically includes:
manually configuring the local information and the remote information of the first docking equipment in the HDLC protocol message, or configuring the local information and the remote information of the first docking equipment in the HDLC protocol message in a self-learning manner.
When the local information of the first docking equipment and the remote information of the first docking equipment in the HDLC protocol message are manually configured, the local information of the first docking equipment is configured local information, and the remote information of the first docking equipment is configured remote information;
when the first docking equipment local information and the first docking equipment remote information in the HDLC protocol message are configured in a self-learning mode, the first docking equipment local information is default local information, and the first docking equipment remote information is self-learned remote information or 0.
As shown in fig. 2, the present invention further provides a method for neighbor discovery, where the method includes:
step S103: the method comprises the steps that a second docking device receives a high-level data link control (HDLC) protocol message sent by a first docking device, wherein the HDLC protocol message carries local information and remote information of the first docking device;
step S104: and the second docking equipment judges whether the first docking equipment is a neighbor of the second docking equipment or not according to the HDLC protocol message.
Specifically, the determining, by the second docking device, whether the first docking device is a neighbor of the second docking device according to the HDLC protocol packet includes:
when the second docking equipment does not store the remote information of the second docking equipment, storing the local information of the first docking equipment; and the second docking equipment judges whether the remote information of the first docking equipment carried by the HDLC protocol message is consistent with the local information of the second docking equipment stored by the second docking equipment, and if so, the first docking equipment is a neighbor of the second docking equipment.
When the second docking device stores remote information of the second docking device, the second docking device judges whether the local information of the first docking device carried in the HDLC protocol message is consistent with the remote information of the second docking device stored by the second docking device, and if so, the first docking device is a neighbor of the second docking device.
As shown in fig. 3, the present invention further provides a neighbor discovery apparatus, which is disposed in a first docking device 1, and includes:
an encapsulation module 11, configured to encapsulate an HDLC protocol packet for high-level data link control; the HDLC protocol message carries local information and remote information of first butt joint equipment, and the local information and the remote information of the first butt joint equipment are used for neighbor judgment of the second butt joint equipment;
and the sending module 12 is configured to send the HDLC protocol packet to a second docking device.
Preferably, the first and second electrodes are formed of a metal,
the encapsulating module 11 is configured to encapsulate the HDLC protocol packet for high-level data link control, where:
manually configuring the local information and the remote information of the first docking equipment in the HDLC protocol message, or configuring the local information and the remote information of the first docking equipment in the HDLC protocol message in a self-learning manner.
When the local information of the first docking equipment and the remote information of the first docking equipment in the HDLC protocol message are manually configured, the local information of the first docking equipment is configured local information, and the remote information of the first docking equipment is configured remote information;
when the first docking equipment local information and the first docking equipment remote information in the HDLC protocol message are configured in a self-learning mode, the first docking equipment local information is default local information, and the first docking equipment remote information is self-learned remote information or 0.
As shown in fig. 4, an apparatus for neighbor discovery is disposed at a second docking device 2, and the apparatus includes:
a receiving module 21, configured to receive an HDLC protocol packet for controlling an HDLC link from a first peer to peer device, where the HDLC protocol packet carries local information of the first peer to peer device and remote information of the first peer to peer device;
and the judging module 22 is configured to judge whether the first docking device is a neighbor of the second docking device according to the HDLC protocol packet.
Preferably, the first and second electrodes are formed of a metal,
the determining module 22 is configured to determine whether the first docking device is a neighbor of the second docking device according to the HDLC protocol packet, and includes:
when the second docking equipment does not store the remote information of the second docking equipment, storing the local information of the first docking equipment; and the second docking equipment judges whether the remote information of the first docking equipment carried by the HDLC protocol message is consistent with the local information of the second docking equipment stored by the second docking equipment, and if so, the first docking equipment is a neighbor of the second docking equipment.
When the second docking device stores remote information of the second docking device, the second docking device judges whether the local information of the first docking device carried in the HDLC protocol message is consistent with the remote information of the second docking device stored by the second docking device, and if so, the first docking device is a neighbor of the second docking device.
Example two
As shown in fig. 5, the following further describes a method for determining its neighbor by a second peer to peer device, taking an example that the first peer to peer device sends an HDLC protocol packet and the second peer to peer device receives the HDLC protocol packet:
step S201: the first butt-joint equipment encapsulates a high-level data link control (HDLC) protocol message; the HDLC protocol message carries the local information of the first butt-joint equipment and the remote information of the first butt-joint equipment;
as shown in fig. 6, two devices in the network are configured into a point-to-point device connection environment, where a POS port link aggregation based on HDLC protocol encapsulation is established between two bridging devices, and an HDLC aggregation channel is established in a point-to-point router device docking scenario.
In this embodiment, the neighbor discovery function may be controlled to be turned on in a manual configuration manner. The first docking device will typically maintain and maintain a table of relationships between the local information and the remote information, as shown in fig. 7 and 8. When the first butt-joint equipment local terminal sends an HDLC protocol message, besides a normal protocol message format, TLV fields carrying local terminal information and remote terminal information are expanded, and information of relevant unique identification local terminal equipment is notified to a remote terminal;
step S202: and the first docking equipment sends the HDLC protocol message to second docking equipment.
Step S202: the method comprises the steps that a second docking device receives a high-level data link control (HDLC) protocol message sent by a first docking device, wherein the HDLC protocol message carries local information and remote information of the first docking device;
when the second docking equipment receives the HDLC protocol message, the second docking equipment analyzes the local information and the remote information carried in the HDLC protocol message except the protocol message format constructed by the remote end, compares the local information and the remote information carried in the HDLC protocol message with the local information and the remote information locally stored by the second docking equipment, and further can judge whether the first docking equipment is a neighbor which is docked previously;
step S203: the method comprises the steps that a second docking device receives a high-level data link control (HDLC) protocol message sent by a first docking device, wherein the HDLC protocol message carries local information and remote information of the first docking device;
step S204: and the second docking equipment judges whether the first docking equipment is a neighbor of the second docking equipment or not according to the HDLC protocol message.
Specifically, the determining, by the second docking device, whether the first docking device is a neighbor of the second docking device according to the HDLC protocol packet includes:
when the second docking equipment does not store the remote information of the second docking equipment, storing the local information of the first docking equipment; and the second docking equipment judges whether the remote information of the first docking equipment carried by the HDLC protocol message is consistent with the local information of the second docking equipment stored by the second docking equipment, and if so, the first docking equipment is a neighbor of the second docking equipment.
When the second docking equipment stores second docking equipment remote information, the second docking equipment judges whether the first docking equipment local information carried by the HDLC protocol message is consistent with the second docking equipment remote information stored by the second docking equipment, and if so, the first docking equipment is a neighbor of the second docking equipment; otherwise, discarding the message and completing the neighbor discovery detection activity.
It should be noted that the first docking device and the second docking device may be interchangeable, and the first docking device and the second docking device may simultaneously turn on the neighbor discovery function. Because the HDLC is a point-to-point docking scene, when the first docking device and the second docking device both start the neighbor discovery function, the two ends can discover neighbors mutually, thereby realizing bidirectional neighbor discovery; otherwise, recording as an abnormal far end, recording time, discarding the message, and completing the neighbor discovery detection activity.
In addition, in this embodiment, the first docking device may configure whether to start the neighbor discovery function, the second docking device may also configure whether to start the neighbor discovery function, and if the second docking device or the second docking device does not start the neighbor discovery function, the packet processing is performed according to the standard protocol.
As shown in fig. 9, when the first docking device sends an HDLC protocol packet, if the first docking device starts the neighbor discovery function, the HDLC protocol packet with the extension field is constructed and sent to the remote end, that is, the second docking device. The HDLC protocol message may carry manually configured local information and remote information, or carry default local information and learned remote information, where the default local information may be a parameter capable of uniquely identifying the uniqueness of the first docking device, such as an interface name + a host name hostname, and if no remote information is learned, the remote information may be carried as 0.
As shown in fig. 10, when the second docking device receives the HDLC protocol packet, if the neighbor discovery function is turned on, it can determine whether the second docking device is a previous docking neighbor by comparing the local information and the remote information stored locally with the information in the received HDLC protocol packet.
It is emphasized that, those skilled in the art will appreciate that the policies and steps embodied in the present invention can be implemented in a general purpose computing device, they can be centralized on a single computing device or distributed across a network of multiple computing devices, and they can optionally be implemented in program code that is executable by a computing device, such that it can be stored in a memory device and executed by a computing device, or they can be separately fabricated into various integrated circuit modules, or multiple modules or steps thereof can be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
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. It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing the relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as a read-only memory, a magnetic or optical disk, and the like. Alternatively, all or part of the steps of the foregoing embodiments may also be implemented by using one or more integrated circuits, and accordingly, each module/module in the foregoing embodiments may be implemented in the form of hardware, and may also be implemented in the form of a software functional module. The present application is not limited to any specific form of hardware or software combination.
Claims (12)
1. A method of neighbor discovery, the method comprising:
the first butt-joint equipment encapsulates a high-level data link control (HDLC) protocol message; the HDLC protocol message carries local information and remote information of first butt joint equipment, and the local information and the remote information of the first butt joint equipment are used for neighbor judgment of second butt joint equipment;
and the first docking equipment sends the HDLC protocol message to the second docking equipment.
2. The method of claim 1, wherein:
the step of encapsulating the HDLC protocol message by the first docking device comprises the following steps:
manually configuring the local information and the remote information of the first docking equipment in the HDLC protocol message, or configuring the local information and the remote information of the first docking equipment in the HDLC protocol message in a self-learning manner.
3. The method of claim 2, wherein:
the manually configuring the local information and the remote information of the first docking device in the HDLC protocol message, or the self-learning configuring the local information and the remote information of the first docking device in the HDLC protocol message includes:
when the local information of the first docking equipment and the remote information of the first docking equipment in the HDLC protocol message are manually configured, the local information of the first docking equipment is configured local information, and the remote information of the first docking equipment is configured remote information;
when the first docking equipment local information and the first docking equipment remote information in the HDLC protocol message are configured in a self-learning mode, the first docking equipment local information is default local information, and the first docking equipment remote information is self-learned remote information or 0.
4. A method of neighbor discovery, the method comprising:
the method comprises the steps that a second docking device receives a high-level data link control (HDLC) protocol message sent by a first docking device, wherein the HDLC protocol message carries local information and remote information of the first docking device;
and the second docking equipment judges whether the first docking equipment is a neighbor of the second docking equipment or not according to the HDLC protocol message.
5. The method of claim 4, wherein:
the second docking device determining whether the first docking device is a neighbor of the second docking device according to the HDLC protocol packet includes:
when the second docking equipment does not store the remote information of the second docking equipment, storing the local information of the first docking equipment; and the second docking equipment judges whether the remote information of the first docking equipment carried by the HDLC protocol message is consistent with the local information of the second docking equipment stored by the second docking equipment, and if so, the first docking equipment is a neighbor of the second docking equipment.
6. The method of claim 4, wherein:
the second docking device determining whether the first docking device is a neighbor of the second docking device according to the HDLC protocol packet includes:
when the second docking device stores remote information of the second docking device, the second docking device judges whether the local information of the first docking device carried in the HDLC protocol message is consistent with the remote information of the second docking device stored by the second docking device, and if so, the first docking device is a neighbor of the second docking device.
7. An apparatus for neighbor discovery at a first docking device, the apparatus comprising:
the encapsulation module is used for encapsulating the HDLC protocol message; the HDLC protocol message carries local information and remote information of first butt joint equipment, and the local information and the remote information of the first butt joint equipment are used for neighbor judgment of second butt joint equipment;
and the sending module is used for sending the HDLC protocol message to the second docking equipment.
8. The apparatus of claim 7, wherein:
the encapsulation module is used for encapsulating the HDLC protocol message of the high-level data link control, and comprises the following steps:
manually configuring the local information and the remote information of the first docking equipment in the HDLC protocol message, or configuring the local information and the remote information of the first docking equipment in the HDLC protocol message in a self-learning manner.
9. The apparatus of claim 8, wherein:
the manually configuring the local information of the first docking device and the remote information of the first docking device in the HDLC protocol message, or the self-learning configuring the local information of the first docking device and the remote information of the first docking device in the HDLC protocol message means:
when the local information of the first docking equipment and the remote information of the first docking equipment in the HDLC protocol message are manually configured, the local information of the first docking equipment is configured local information, and the remote information of the first docking equipment is configured remote information;
when the first docking equipment local information and the first docking equipment remote information in the HDLC protocol message are configured in a self-learning mode, the first docking equipment local information is default local information, and the first docking equipment remote information is self-learned remote information or 0.
10. An apparatus for neighbor discovery at a second docking device, the apparatus comprising:
the HDLC protocol message carries the local information of the first docking equipment and the remote information of the first docking equipment;
and the judging module is used for judging whether the first docking equipment is a neighbor of the second docking equipment according to the HDLC protocol message.
11. The apparatus of claim 10, wherein:
the judging module is configured to judge whether the first docking device is a neighbor of the second docking device according to the HDLC protocol packet, including:
when the second docking equipment does not store the remote information of the second docking equipment, storing the local information of the first docking equipment; and the second docking equipment judges whether the remote information of the first docking equipment carried by the HDLC protocol message is consistent with the local information of the second docking equipment stored by the second docking equipment, and if so, the first docking equipment is a neighbor of the second docking equipment.
12. The apparatus of claim 10, wherein:
the judging module is configured to judge whether the first docking device is a neighbor of the second docking device according to the HDLC protocol packet, including:
when the second docking device stores remote information of the second docking device, the second docking device judges whether the local information of the first docking device carried in the HDLC protocol message is consistent with the remote information of the second docking device stored by the second docking device, and if so, the first docking device is a neighbor of the second docking device.
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| PCT/CN2015/086126 WO2016127599A1 (en) | 2015-02-15 | 2015-08-05 | Neighbor discovering method and apparatus |
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| CN103227733A (en) * | 2013-04-27 | 2013-07-31 | 神州数码网络(北京)有限公司 | Topology discovery method and topology discovery system |
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| WO2016127599A1 (en) | 2016-08-18 |
| CN105991448A (en) | 2016-10-05 |
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