CN111865785A - SR-TP tunnel signal transmission method, device, server and storage medium - Google Patents

SR-TP tunnel signal transmission method, device, server and storage medium Download PDF

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Publication number
CN111865785A
CN111865785A CN202010600447.8A CN202010600447A CN111865785A CN 111865785 A CN111865785 A CN 111865785A CN 202010600447 A CN202010600447 A CN 202010600447A CN 111865785 A CN111865785 A CN 111865785A
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alarm
tunnel
node
controller
port information
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CN111865785B (en
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秦成
姜哲颖
马超
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Fiberhome Telecommunication Technologies Co Ltd
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Fiberhome Telecommunication Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/34—Source routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
    • H04L41/0663—Performing the actions predefined by failover planning, e.g. switching to standby network elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0803—Configuration setting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0893—Assignment of logical groups to network elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/12—Discovery or management of network topologies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/82—Miscellaneous aspects
    • H04L47/825—Involving tunnels, e.g. MPLS

Abstract

The invention discloses a signal transmission method, a device, a server and a storage medium of an SR-TP tunnel, wherein the method comprises the steps of acquiring an SD alarm and port information of a network element inlet end when the SD alarm is detected at the network element inlet end of any node of a segment routing transmission subset SR-TP tunnel based on traffic engineering; sending the SD alarm and the port information to a controller of a Software Defined Network (SDN) to obtain a downstream sink node; the target event corresponding to the SD alarm is transmitted to the downstream destination node, most complex network and mixed network topology scenes can be compatible, the application range is wide, additional OAM messages or control fields do not need to be redefined, message overhead is saved, and transmission efficiency is improved; the method can meet the requirement of triggering linear protection inversion when signal degradation is generated at any position of the SR-TP tunnel link, improves the response efficiency of coping with faults, and ensures the continuity and the fluency of information transmission.

Description

SR-TP tunnel signal transmission method, device, server and storage medium
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, a server, and a storage medium for SR-TP tunnel signal transmission.
Background
A Slicing Packet Network (SPN) is the main push direction of a fifth Generation mobile communication technology (5 Generation mobile networks or 5th Generation wireless systems, 5th-Generation, 5G) bearer Network; segment Routing (SR) is a technology in bearer networks, and is a source Routing mechanism; the SR technology expands and collects path information through an Internal Gateway Protocol (IGP), a head node forms an explicit/non-explicit path according to the collected information, and the path is established without depending on an intermediate node, so that the path is established at the head node and is effective, and the path calculation of the intermediate node of the network is avoided.
SR is a source Routing tunnel technology, a source node designates a path for an application packet, and converts the path into an ordered Segment list to BE encapsulated in a packet header, and an intermediate node of the path only needs to forward according to the path designated in the packet header, so that the SR can simplify the network and has good extensibility.
SR-TP and SR-BE are tunnel expansion technology, SR-TP tunnel is used for bearing connection-oriented point-to-point service, and provides end-to-end monitoring operation and maintenance capability based on connection; the SR-BE tunnel is used for bearing the Mesh service of the connectionless multi-hop Mesh network, providing any topological service connection and simplifying the tunnel planning and deployment.
When a source end node and a host node of an SR-TP tunnel generate SD alarms, the existing scheme is that a protection module of the node directly detects the alarms and triggers tunnel switching operation, but if a bidirectional switching effect is to be achieved, the SD alarms generated by the station must be transmitted to a downstream node, and when an intermediate node of the SR-TP tunnel detects an SD signal, a link signal is transmitted to the downstream node, and the method in the industry is to detect reserved byte bit of a Continuity Check (CC) message format through an extended Virtual Path (VP) layer; or a VP layer Operation, Administration and Maintenance (OAM) type function is redefined and set for specially transmitting the related bit position of the SD alarm downstream.
The existing scheme additionally increases development and use cost by redefining the type function of the VP layer OAM; and the message format is detected by expanding the connectivity, so that the message overhead is additionally increased, and the speed and the efficiency of information transmission are reduced.
Disclosure of Invention
The invention mainly aims to provide a method, a device, a server and a storage medium for transmitting SR-TP tunnel signals, aiming at solving the problem that development and use cost are additionally increased by redefining the type function of setting VP layer OAM in the prior art; and the technical problems of increasing message overhead and reducing the speed and efficiency of information transmission are solved by expanding the connectivity detection message format.
In a first aspect, the present invention provides a SR-TP tunnel signal transmission method, including:
when a signal degradation SD alarm is detected at a network element inlet end of any node of a segment routing transmission subset SR-TP tunnel based on traffic engineering, an SD alarm and port information of the network element inlet end are obtained;
sending the SD alarm and the port information to a controller of a Software Defined Network (SDN) to obtain a downstream sink node;
and transmitting the target event corresponding to the SD alarm to the downstream sink node.
Optionally, the sending the SD alarm and the port information to a controller of a software defined network SDN to obtain a downstream sink node includes:
acquiring current network topology data, and sending the current network topology data to a controller of a Software Defined Network (SDN);
And sending the SD alarm and the port information to a controller of an SDN (software defined network), so that the controller responds to the SD alarm, acquires a network element node port corresponding to the port information in the current network topology data, and determines a downstream sink node according to the network element node port.
Optionally, the sending the SD alarm and the port information to a controller of an SDN, so that the controller obtains, in response to the SD alarm, a network element node port corresponding to the port information in the current network topology data, and determines a downstream sink node according to the network element node port, includes:
and sending the SD alarm and the port information to a controller of an SDN (software defined network), so that the controller responds to the SD alarm, acquires a network element node port corresponding to the port information in the current network topology data, traverses all SR-TP tunnel paths passing through the network element node port according to the current network topology data, acquires tunnel configuration parameters corresponding to each SR-TP tunnel path, and determines downstream sink nodes of each SR-TP tunnel path according to the tunnel configuration parameters.
Optionally, the transmitting the target event corresponding to the SD alarm to the downstream sink node includes:
Obtaining a local label from a destination node to a source node of each tunnel from the tunnel configuration parameters, and obtaining a label corresponding to the downstream destination node from the local label as an end-to-end service label;
and packaging the end-to-end service label and the target event corresponding to the SD alarm, generating a control command, and sending the control command to the downstream sink node.
Optionally, the acquiring, when a signal degradation SD alarm is detected at a network element ingress end of any node of a segment routing transport subset SR-TP tunnel based on traffic engineering, an SD alarm and port information at the network element ingress end includes:
when a signal degradation SD alarm is detected at the network element inlet end of any node of a segment routing transport subset SR-TP tunnel based on traffic engineering, alarm data corresponding to the SD alarm is sent to an equipment end, so that the equipment end runs a preset polling thread according to an event reporting component, and SD alarm information of an equipment port and port information of the network element inlet end are collected.
Optionally, the sending the SD alarm and the port information to a controller of a software defined network SDN includes:
and receiving the alarm event fed back by the device side, and reporting the alarm event to a controller of a Software Defined Network (SDN), wherein the alarm event is an event generated by the device side according to the SD alarm information and the port information.
Optionally, the receiving the alarm event fed back by the device side and reporting the alarm event to a controller of a software defined network SDN includes:
and receiving the alarm event fed back by the equipment side, and sending the alarm event to a controller of a Software Defined Network (SDN) by using an interface management component on the platform side through an intermediate system to intermediate system (ISIS) protocol.
Optionally, after the target event corresponding to the SD alarm is transmitted to the downstream sink node, the SR-TP tunnel signal transmission method further includes:
triggering a preset linear protection switching mechanism of the downstream sink node, and switching the current SR-TP tunnel path of the downstream sink node to a standby SR-TP tunnel path.
In a second aspect, the present invention further provides an SR-TP tunnel signal transferring apparatus, including:
the system comprises a port information acquisition module, a traffic engineering-based segment routing transmission subset SR-TP tunnel and a traffic engineering-based segment routing transmission subset SR-TP tunnel, wherein the port information acquisition module is used for acquiring an SD alarm and port information at the inlet end of a network element when the SD alarm of signal degradation is detected at the inlet end of the network element of any node of the segment routing transmission subset SR-TP tunnel;
the node acquisition module is used for sending the SD alarm and the port information to a controller of a Software Defined Network (SDN) to acquire a downstream sink node;
And the transfer module is used for transferring the target event corresponding to the SD alarm to the downstream sink node.
Optionally, the node obtaining module includes:
the system comprises a topology data acquisition module, a controller and a network interface module, wherein the topology data acquisition module is used for acquiring current network topology data and sending the current network topology data to the controller of the SDN;
and the sink node determining module is used for sending the SD alarm and the port information to a controller of an SDN (software defined network), so that the controller responds to the SD alarm, acquires a network element node port corresponding to the port information in the current network topology data, and determines a downstream sink node according to the network element node port.
Optionally, the sink node determining module is further configured to send the SD alarm and the port information to a controller of an SDN, so that the controller, in response to the SD alarm, obtains a network element node port corresponding to the port information in the current network topology data, traverses all SR-TP tunnel paths passing through the network element node port according to the current network topology data, obtains tunnel configuration parameters corresponding to each SR-TP tunnel path, and determines a downstream sink node of each SR-TP tunnel path according to the tunnel configuration parameters.
In a third aspect, the present invention further provides a server, where the server includes: memory, a processor, and a SR-TP tunneling signal transfer program stored on the memory and executable on the processor, the SR-TP tunneling signal transfer program configured to implement the steps of the SR-TP tunneling signal transfer method as recited in the preceding claims.
In a fourth aspect, the present invention further provides a storage medium having stored thereon an SR-TP tunnel signal transfer program, which when executed by a processor implements the steps of the SR-TP tunnel signal transfer method as described above.
The SR-TP tunnel signal transmission method provided by the invention obtains SD alarm and port information of the network element inlet end when the SD alarm of signal degradation is detected at the network element inlet end of any node of a segment routing transmission subset SR-TP tunnel based on flow engineering; sending the SD alarm and the port information to a controller of a Software Defined Network (SDN) to obtain a downstream sink node; the target event corresponding to the SD alarm is transmitted to the downstream destination node, most complex network and mixed network topology scenes can be compatible, the application range is wide, no extra OAM message or control field needs to be redefined, message overhead is saved, and transmission efficiency is improved; the method can meet the requirement of triggering linear protection inversion when signal degradation is generated at any position of the SR-TP tunnel link, improves the response efficiency of coping with faults, and ensures the continuity and the fluency of information transmission.
Drawings
FIG. 1 is a schematic diagram of a server architecture of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a first embodiment of a SR-TP tunnel signal transmission method according to the present invention;
FIG. 3 is a flowchart illustrating a SR-TP tunnel signal transmission method according to a second embodiment of the present invention;
FIG. 4 is a flowchart illustrating a SR-TP tunnel signal transmission method according to a third embodiment of the present invention;
FIG. 5 is a flowchart illustrating a SR-TP tunnel signal transmission method according to a fourth embodiment of the present invention;
FIG. 6 is a flow chart of link SD alarm transmission in the SR-TP tunnel signal transmission method of the present invention;
FIG. 7 is a flowchart illustrating a method for transferring SR-TP tunnel signals according to a fifth embodiment of the present invention;
FIG. 8 is a diagram illustrating an alarm notification in the SR-TP tunnel signal transmission method according to the present invention;
FIG. 9 is a flowchart illustrating a method for transferring SR-TP tunnel signals according to a sixth embodiment of the present invention;
fig. 10 is a diagram of a linear protection switching scenario in the SR-TP tunnel signal transmission method of the present invention;
FIG. 11 is a functional block diagram of a SR-TP tunneling signal transmission apparatus according to a first embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The solution of the embodiment of the invention is mainly as follows: when a signal degradation SD alarm is detected at a network element inlet end of any node of a segment routing transmission subset SR-TP tunnel based on traffic engineering, an SD alarm and port information of the network element inlet end are obtained; sending the SD alarm and the port information to a controller of a Software Defined Network (SDN) to obtain a downstream sink node; the target event corresponding to the SD alarm is transmitted to the downstream destination node, most complex network and mixed network topology scenes can be compatible, the application range is wide, no extra OAM message or control field needs to be redefined, message overhead is saved, and transmission efficiency is improved; the method can meet the requirement of triggering linear protection inversion when signals are degraded at any position of an SR-TP tunnel link, improves the response efficiency for coping with faults, ensures the continuity and the fluency of information transmission, solves the problem that the development and use cost is additionally increased by redefining the type function of VP layer OAM in the prior art; and the technical problems of increasing message overhead and reducing the speed and efficiency of information transmission are solved by expanding the connectivity detection message format.
Referring to fig. 1, fig. 1 is a schematic diagram of a server structure of a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the server may include: a processor 1001, such as a CPU, a communication bus 1002, a user side interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., a Wi-Fi interface). The Memory 1005 may be a high-speed RAM Memory or a Non-Volatile Memory (Non-Volatile Memory), such as a disk Memory. The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the server architecture shown in FIG. 1 is not intended to be limiting of the server, and may include more or fewer components than those shown, or some components in combination, or a different arrangement of components.
As shown in fig. 1, a memory 1005 as a storage medium may include an operating device, a network communication module, a client interface module, and an SR-TP tunneling signal transfer program.
The server of the present invention calls the SR-TP tunnel signal transfer program stored in the memory 1005 through the processor 1001, and performs the following operations:
when a signal degradation SD alarm is detected at a network element inlet end of any node of a segment routing transmission subset SR-TP tunnel based on traffic engineering, an SD alarm and port information of the network element inlet end are obtained;
sending the SD alarm and the port information to a controller of a Software Defined Network (SDN) to obtain a downstream sink node;
and transmitting the target event corresponding to the SD alarm to the downstream sink node.
Further, the processor 1001 may call the SR-TP tunnel signaling program stored in the memory 1005, and also perform the following operations:
acquiring current network topology data, and sending the current network topology data to a controller of a Software Defined Network (SDN);
and sending the SD alarm and the port information to a controller of an SDN (software defined network), so that the controller responds to the SD alarm, acquires a network element node port corresponding to the port information in the current network topology data, and determines a downstream sink node according to the network element node port.
Further, the processor 1001 may call the SR-TP tunnel signaling program stored in the memory 1005, and also perform the following operations:
And sending the SD alarm and the port information to a controller of an SDN (software defined network), so that the controller responds to the SD alarm, acquires a network element node port corresponding to the port information in the current network topology data, traverses all SR-TP tunnel paths passing through the network element node port according to the current network topology data, acquires tunnel configuration parameters corresponding to each SR-TP tunnel path, and determines downstream sink nodes of each SR-TP tunnel path according to the tunnel configuration parameters.
Further, the processor 1001 may call the SR-TP tunnel signaling program stored in the memory 1005, and also perform the following operations:
obtaining a local label from a destination node to a source node of each tunnel from the tunnel configuration parameters, and obtaining a label corresponding to the downstream destination node from the local label as an end-to-end service label;
and packaging the end-to-end service label and the target event corresponding to the SD alarm, generating a control command, and sending the control command to the downstream sink node.
Further, the processor 1001 may call the SR-TP tunnel signaling program stored in the memory 1005, and also perform the following operations:
When a signal degradation SD alarm is detected at the network element inlet end of any node of a segment routing transport subset SR-TP tunnel based on traffic engineering, alarm data corresponding to the SD alarm is sent to an equipment end, so that the equipment end runs a preset polling thread according to an event reporting component, and SD alarm information of an equipment port and port information of the network element inlet end are collected.
Further, the processor 1001 may call the SR-TP tunnel signaling program stored in the memory 1005, and also perform the following operations:
and receiving the alarm event fed back by the device side, and reporting the alarm event to a controller of a Software Defined Network (SDN), wherein the alarm event is an event generated by the device side according to the SD alarm information and the port information.
Further, the processor 1001 may call the SR-TP tunnel signaling program stored in the memory 1005, and also perform the following operations:
and receiving the alarm event fed back by the equipment side, and sending the alarm event to a controller of a Software Defined Network (SDN) by using an interface management component on the platform side through an intermediate system to intermediate system (ISIS) protocol.
Further, the processor 1001 may call the SR-TP tunnel signaling program stored in the memory 1005, and also perform the following operations:
Triggering a preset linear protection switching mechanism of the downstream sink node, and switching the current SR-TP tunnel path of the downstream sink node to a standby SR-TP tunnel path.
Based on the hardware structure, the embodiment of the SR-TP tunnel signal transmission method is provided.
Referring to fig. 2, fig. 2 is a flowchart illustrating a SR-TP tunnel signal transmission method according to a first embodiment of the present invention.
In a first embodiment, the SR-TP tunnel signal transfer method includes the steps of:
step S10, when a signal degradation SD alarm is detected at the network element inlet end of any node of the SR-TP tunnel based on the segment routing transmission subset of the traffic engineering, the SD alarm and the port information at the network element inlet end are obtained.
It should be noted that, monitoring and detecting the network element inlet end of any node of the SR-TP tunnel, the SD alarm detection mode may be packet loss rate detection based on the number of Continuity Check (CC) messages, or packet loss rate detection based on the number of Connectivity Verification (CV) messages, or may be detecting whether there is an SD alarm at the network element inlet end in a physical link layer error code statistics mode; certainly, the SD alarm may also be detected in other manners, which is not limited in this embodiment, and when the SD alarm is detected, the SD alarm and the port information at the network element entry end are obtained.
It can be understood that, generally, an equipment side alarm acquisition component may be set at any node of the SR-TP tunnel so as to obtain the packet receiving and sending count of the port from the driver adaptation layer in real time or periodically to calculate the packet loss rate, and when the packet loss rate is greater than the SD configuration threshold, an SD alarm is generated and reported to the platform side OAM component through an event; certainly, when the source end node or the sink node of the SR-TP tunnel generates an SD alarm, the node protection module may detect the alarm and directly trigger the switching, so this embodiment mainly aims at a signal transmission manner when the intermediate node of the SR-TP tunnel detects the SD alarm, and certainly, when the source end node or the sink node generates the SD alarm, signal transmission may be performed in this manner of this embodiment, which is not limited in this embodiment.
And step S20, sending the SD alarm and the port information to a controller of a Software Defined Network (SDN) to obtain a downstream sink node.
It should be noted that a Software Defined Network (SDN) is a novel Network innovation architecture, and is an implementation manner of Network virtualization, that is, control and traffic forwarding of a Network are split and are specially controlled by an SDN controller, and an underlying node only needs to forward, and is a reinforced rights management mode; when a signal degradation SD alarm is detected at the network element inlet end of any node of the SR-TP tunnel, an alarm event is generated, and the SD alarm of the station-passing link of the SR-TP tunnel and the port information can be reported to a controller of an SDN (software defined network), so that a downstream sink node, namely a downstream sink node, can be determined.
And step S30, transmitting the target event corresponding to the SD alarm to the downstream sink node.
It can be understood that, after determining the downstream sink node, the target event corresponding to the SD alarm may be obtained, and then the target event is transmitted to the downstream sink node, thereby implementing the downstream transmission of the SD alarm and providing a basis for implementing the bidirectional switching of the linear protection switching.
According to the scheme, when a signal degradation SD alarm is detected at the network element inlet end of any node of a segment routing transport subset SR-TP tunnel based on traffic engineering, the SD alarm and port information of the network element inlet end are obtained; sending the SD alarm and the port information to a controller of a Software Defined Network (SDN) to obtain a downstream sink node; the target event corresponding to the SD alarm is transmitted to the downstream destination node, most complex network and mixed network topology scenes can be compatible, the application range is wide, no extra OAM message or control field needs to be redefined, message overhead is saved, and transmission efficiency is improved; the method can meet the requirement of triggering linear protection inversion when signal degradation is generated at any position of the SR-TP tunnel link, improves the response efficiency of coping with faults, and ensures the continuity and the fluency of information transmission.
Further, fig. 3 is a flowchart illustrating a second embodiment of the SR-TP tunnel signal transmission method according to the present invention, and as shown in fig. 3, the second embodiment of the SR-TP tunnel signal transmission method according to the present invention is proposed based on the first embodiment, in this embodiment, the step S20 specifically includes the following steps:
step S21, acquiring current network topology data, and sending the current network topology data to a controller of a Software Defined Network (SDN).
It should be noted that the current network topology data is the latest network topology data acquired at the current time.
Step S22, sending the SD alarm and the port information to a controller of an SDN, so that the controller obtains a network element node port corresponding to the port information in the current network topology data in response to the SD alarm, and determines a downstream sink node according to the network element node port.
It can be understood that, after the current network topology data, the SD alarm, and the port information are sent to a controller of an SDN, the controller may traverse all SR-TP tunnel information and network elements passing through a network element ingress end of any node using the current network topology data, and in response to the SD alarm, the controller may traverse a network element node port corresponding to the port information using the current network topology data, and further determine a downstream sink node according to the network element node port and the current network topology data.
According to the scheme, the current network topology data are obtained and sent to a controller of a Software Defined Network (SDN); and sending the SD alarm and the port information to a controller of an SDN (software defined network), so that the controller responds to the SD alarm, acquires a network element node port corresponding to the port information in the current network topology data, and determines a downstream sink node according to the network element node port, thereby being capable of accelerating the speed and efficiency of alarm processing, meeting the requirement of triggering linear protection inversion when signal degradation is generated at any position of an SR-TP tunnel link, improving the response efficiency of coping with faults, and ensuring the continuity and the fluency of information transmission.
Further, fig. 4 is a flowchart illustrating a third embodiment of the SR-TP tunnel signal transmission method according to the present invention, and as shown in fig. 4, the third embodiment of the SR-TP tunnel signal transmission method according to the present invention is proposed based on the second embodiment, in this embodiment, the step S22 specifically includes the following steps:
step S221, sending the SD alarm and the port information to a controller of an SDN, so that the controller obtains a network element node port corresponding to the port information in the current network topology data in response to the SD alarm, traverses all SR-TP tunnel paths passing through the network element node port according to the current network topology data, obtains tunnel configuration parameters corresponding to each SR-TP tunnel path, and determines a downstream sink node of each SR-TP tunnel path according to the tunnel configuration parameters.
It should be noted that the controller may traverse all SR-TP tunnel paths passing through the network element node port according to the current network topology data, may obtain tunnel configuration parameters corresponding to each SR-TP tunnel path after determining all SR-TP tunnel paths, and may calculate a tunnel path according to its own tunnel path calculation function, and further may obtain a downstream sink node matching the network element node port according to the tunnel path, without redefining an additional OAM packet or a control field, which saves packet overhead and improves transmission efficiency.
According to the scheme, the SD alarm and the port information are sent to a controller of an SDN, so that the controller responds to the SD alarm, obtains a network element node port corresponding to the port information in the current network topology data, traverses all SR-TP tunnel paths passing through the network element node port according to the current network topology data, obtains tunnel configuration parameters corresponding to each SR-TP tunnel path, determines a downstream sink node of each SR-TP tunnel path according to the tunnel configuration parameters, and does not need to redefine an additional OAM message or a control field, thereby saving message overhead and improving transmission efficiency; the method can meet the requirement of triggering linear protection inversion when signal degradation is generated at any position of the SR-TP tunnel link, improves the response efficiency of coping with faults, and ensures the continuity and the fluency of information transmission.
Further, fig. 5 is a flowchart illustrating a fourth embodiment of the SR-TP tunnel signal transmission method according to the present invention, and as shown in fig. 5, the fourth embodiment of the SR-TP tunnel signal transmission method according to the present invention is proposed based on the third embodiment, in this embodiment, the step S30 specifically includes the following steps:
step S31, obtaining the local label from the sink node to the source node of each tunnel from the tunnel configuration parameters, and obtaining the label corresponding to the downstream sink node from the local label as the end-to-end service label.
It should be understood that the path of each SR-TP tunnel may be determined by the tunnel configuration parameter, and further, a source network element node port and a sink network element node port on each SR-TP tunnel may be determined, where network elements to which a start point and an end point of each layer of tunnel path belong are different, and network elements to which a start point and an end point of an outermost layer of path belong are a source network element and a sink network element, and certainly, a sink network element may also be determined in other manners, for example, a sink network element is determined in a shortest route routing manner, which is not limited in this embodiment.
It should be noted that, a layer of end-to-end labels for identifying service flows is added in the SR-TP tunnel, that is, corresponding local labels are allocated from each sink node to the source node, and a label corresponding to the downstream sink node can be determined from the local labels as an end-to-end service label.
Step S32, packaging and encapsulating the end-to-end service label and the target event corresponding to the SD alarm, generating a control command, and issuing the control command to the downstream sink node.
It can be understood that a control command can be generated by packaging and encapsulating the end-to-end service label and the target event corresponding to the SD alarm, and then the control command is issued to the downstream sink node, and an OAM and an Automatic Protection Switching (APS) can be run based on the end-to-end service label; the controller packs and encapsulates the end-to-end service label and the SD alarm information, and issues the end-to-end service label and the SD alarm information to the host node network element in a control command mode; each node network element searches the corresponding SR-TP tunnel according to the end-to-end service label, and the protection module receives the SD alarm of the SR-TP tunnel, so that protection switching is triggered without redefining extra OAM messages or control fields, message overhead is saved, and transmission efficiency is improved.
In a specific implementation, as shown in fig. 6, fig. 6 IS a Link SD alarm transmission flow chart in the SR-TP tunnel signal transmission method of the present invention, where a controller of an SDN supports a Border Gateway Protocol (BGP-LS), and a network topology, a topology State, and an SR label found in an IS-IS domain of a forwarding plane can be fed back to the SDN controller in real time through the BGP-LS Protocol; based on BGP-LS feedback network real-time topology and user tunnel configuration information, SR-TP tunnel configuration on a port of a node with SD alarm can be searched, and through the SR-TP tunnel path calculation function of a controller, sink node network elements corresponding to two tunnels are found; the method comprises the steps that an SPN network forwarding surface reports network real-time topology and user tunnel configuration to an SDN controller based on a BGP-LS protocol, a fault node reports an SD alarm and a positioning port number to the SDN controller based on an ISIS protocol, the positioning port number is the port number of an SR-TP tunnel network access port, the SDN controller performs tunnel path calculation, a downstream sink node is obtained, and then a control command is issued and the alarm is transmitted to the downstream sink node through a tunnel label.
In this embodiment, by the above scheme, a local label from each sink node to a source node is obtained, and a label corresponding to the downstream sink node is obtained from the local label as an end-to-end service label; the end-to-end service label and the target event corresponding to the SD alarm are packaged, a control command is generated, and the control command is issued to the downstream sink node, so that additional OAM messages or control fields do not need to be redefined, message overhead is saved, and transmission efficiency is improved; the method can meet the requirement of triggering linear protection inversion when signal degradation is generated at any position of the SR-TP tunnel link, improves the response efficiency of coping with faults, and ensures the continuity and the fluency of information transmission.
Further, fig. 7 is a flowchart illustrating a fifth embodiment of the SR-TP tunnel signal transmission method according to the present invention, and as shown in fig. 7, the fifth embodiment of the SR-TP tunnel signal transmission method according to the present invention is proposed based on the first embodiment, in this embodiment, the step S10 specifically includes the following steps:
step S11, when a signal degradation SD alarm is detected at the network element inlet end of any node of the SR-TP tunnel based on the segment routing transport subset of the traffic engineering, the alarm data corresponding to the SD alarm is sent to the equipment end, so that the equipment end runs a preset polling thread according to an event reporting component, thereby acquiring the SD alarm information of the equipment port and the port information of the network element inlet end, and generating an alarm event according to the SD alarm information and the port information.
It should be noted that when an SD alarm is detected, alarm data corresponding to the SD alarm may be sent to a device side, the device side runs a preset polling thread according to an event reporting component, the preset polling thread is a thread preset for performing polling operation on each port of the device side, alarm information and port information may be collected from each port of the device side by running the preset polling line, and an alarm event is generated, so that the speed and efficiency of determining a downstream sink node may be further improved, the accuracy of subsequently determining the downstream sink node is ensured, and the response efficiency to a fault is improved.
Correspondingly, the step in step S20 is to send the SD alarm and the port information to a controller of a software defined network SDN, and specifically includes the following steps:
and receiving the alarm event fed back by the device side, and reporting the alarm event to a controller of a Software Defined Network (SDN), wherein the alarm event is an event generated by the device side according to the SD alarm information and the port information.
It can be understood that the alarm event is an event generated by the device end according to the SD alarm information and the port information, and after receiving the alarm event fed back by the device end, the alarm event may be reported to a controller of the SDN, so that the controller of the SDN processes the alarm event.
Further, the step of receiving the alarm event fed back by the device side and reporting the alarm event to a controller of a software defined network SDN specifically includes the following steps:
and receiving the alarm event fed back by the equipment side, and sending the alarm event to a controller of a Software Defined Network (SDN) by using an interface management component on the platform side through an intermediate system to intermediate system (ISIS) protocol.
In a specific implementation, when a link failure occurs in the SR-TP tunnel, there are two failure situations. One condition is that the link is interrupted, the downstream sink node cannot receive the CV message, and a Loss of connectivity (LOC) alarm is generated; the other condition is that a Cyclic Redundancy Check (CRC) error code occurs in a link, and a node generates a signal degradation SD alarm; the transmission processing modes of the link signals in the two cases are different, and for the first case, the protection module of the downstream sink node directly triggers the protection switching after detecting the LOC alarm of the VP layer.
For the second case, the embodiment adopts a mode of reporting the SD alarm detected by the node port to the SDN controller, searching the downstream sink node by the SDN controller, and notifying the SD alarm to the downstream sink node; as shown in fig. 8, fig. 8 IS a schematic diagram of an alarm notification of the SR-TP tunnel signal transmission method of the present invention, where a control Plane has an SDN controller, a forwarding Plane has a device platform side and a device product side, the device product side operates a preset polling thread according to an Event reporting component (Fos Data Plane Object Event, FDPOE) to initiate a polling thread, so as to collect alarm information and port information to each port of a device end, and further generate an alarm Event, and simultaneously send the alarm Data to an interface management component (IFMGR) of the device platform side, the IFMGR component notifies the alarm Event generated by the alarm information and the port information to the SDN controller through an Intermediate System-to-Intermediate System (IS-IS) protocol, so as to further improve the speed and efficiency of determining a downstream sink node and ensure the accuracy of subsequently determining the downstream sink node, the response efficiency to the fault is improved.
According to the scheme, when a signal degradation SD alarm is detected at the network element inlet end of any node of a segment routing transport subset SR-TP tunnel based on traffic engineering, alarm data corresponding to the SD alarm is sent to the equipment end, so that the equipment end runs a preset polling thread according to an event reporting component, SD alarm information of an equipment port and port information of the network element inlet end are acquired, and an alarm event is generated according to the SD alarm information and the port information; and receiving the alarm event fed back by the device side, and reporting the alarm event to a controller of a Software Defined Network (SDN), so that the speed and efficiency of determining the downstream sink node can be further improved, the accuracy of subsequently determining the downstream sink node is ensured, and the response efficiency of handling faults is improved.
Further, fig. 9 is a flowchart illustrating a sixth embodiment of the SR-TP tunnel signal transmission method according to the present invention, and as shown in fig. 9, the sixth embodiment of the SR-TP tunnel signal transmission method according to the present invention is proposed based on the first embodiment, in this embodiment, after the step S30, the SR-TP tunnel signal transmission method further includes the following steps:
step S40, triggering a preset linear protection switching mechanism of the downstream sink node, and switching the current SR-TP tunnel path of the downstream sink node to a standby SR-TP tunnel path.
It should be noted that the preset linear protection switching mechanism is a preset automatic protection switching mechanism, and generally performs trigger protection after the downstream sink node receives the target event corresponding to the SD alarm, that is, switches the current SR-TP tunnel path of the downstream sink node to the standby SR-TP tunnel path.
In a specific implementation, as shown in fig. 10, fig. 10 is a linear protection switching scenario diagram in the SR-TP tunnel signal transmission method of the present invention; wherein, the primary path of the linear protection SR-TP-1 is A-B-C-D-E-J and is named as path 1, and the standby path is A-F-G-H-I-J and is named as path 2; the primary path of the linear protection SR-TP-2 is A-B-C-D-I and is named as path 3, and the standby path is A-F-G-H-I and is named as path 4; the node A and the node F carry out data transmission with a Base Station, and the node E and the node J carry out data transmission with a Base Station Controller (BSC) or a Packet Core network (EPC); wherein, two tunnel paths of the path 1 and the path 3 share a common path on the node B, the node C and the node D, link error code detection is deployed between every two nodes (A-B, B-C, C-D, D-E, D-I) passed by the two tunnel paths, and SD alarm condition is counted. Meanwhile, VP OAM is respectively deployed on source and destination nodes of the four paths, bidirectional CV connectivity detection is started, and OAM and APS can be achieved according to end-to-end service labels. The controller packages the end-to-end service label and the SD alarm information and issues the end-to-end service label and the SD alarm information to the host node network elements J and I in a control command mode. Each node network element searches a corresponding SR-TP tunnel according to the end-to-end service label, the protection module receives the SD alarm of the SR-TP tunnel, the protection switching is triggered, the SR-TP-1 is protected to be switched to the standby tunnel path 2, and the SR-TP-2 is protected to be switched to the standby tunnel path 4.
According to the scheme, the current SR-TP tunnel path of the downstream sink node is switched to the standby SR-TP tunnel path by triggering the preset linear protection switching mechanism of the downstream sink node, most of complex network and hybrid network topology scenes can be compatible, the application range is wide, additional OAM messages or control fields do not need to be redefined, message overhead is saved, and transmission efficiency is improved; the method can meet the requirement of triggering linear protection inversion when signal degradation is generated at any position of the SR-TP tunnel link, improves the response efficiency of coping with faults, and ensures the continuity and the fluency of information transmission.
Correspondingly, the invention further provides an SR-TP tunnel signal transmission device.
Referring to fig. 11, fig. 11 is a functional block diagram of a SR-TP tunnel signal transmitting apparatus according to a first embodiment of the present invention.
In a first embodiment of the SR-TP tunnel signal transmitting apparatus of the present invention, the SR-TP tunnel signal transmitting apparatus includes:
a port information obtaining module 10, configured to obtain an SD alarm and port information at an entry end of a network element when a signal degradation SD alarm is detected at the entry end of the network element of any node of a segment routing transport subset SR-TP tunnel based on traffic engineering.
And the node obtaining module 20 is configured to send the SD alarm and the port information to a controller of a software defined network SDN, so as to obtain a downstream sink node.
A transferring module 30, configured to transfer the target event corresponding to the SD alarm to the downstream sink node.
Further, the node acquisition module 20 includes:
the system comprises a topology data acquisition module, a controller and a network interface module, wherein the topology data acquisition module is used for acquiring current network topology data and sending the current network topology data to the controller of the SDN;
and the sink node determining module is used for sending the SD alarm and the port information to a controller of an SDN (software defined network), so that the controller responds to the SD alarm, acquires a network element node port corresponding to the port information in the current network topology data, and determines a downstream sink node according to the network element node port.
Further, the sink node determining module is further configured to send the SD alarm and the port information to a controller of an SDN, so that the controller, in response to the SD alarm, obtains a network element node port corresponding to the port information in the current network topology data, traverses all SR-TP tunnel paths passing through the network element node port according to the current network topology data, obtains tunnel configuration parameters corresponding to each SR-TP tunnel path, and determines a downstream sink node of each SR-TP tunnel path according to the tunnel configuration parameters.
The steps implemented by each functional module of the SR-TP tunnel signal transmission apparatus may refer to each embodiment of the SR-TP tunnel signal transmission method of the present invention, and are not described herein again.
Furthermore, an embodiment of the present invention further provides a storage medium, where an SR-TP tunnel signal transfer program is stored, and when executed by a processor, the SR-TP tunnel signal transfer program implements the following operations:
when a signal degradation SD alarm is detected at a network element inlet end of any node of a segment routing transmission subset SR-TP tunnel based on traffic engineering, an SD alarm and port information of the network element inlet end are obtained;
sending the SD alarm and the port information to a controller of a Software Defined Network (SDN) to obtain a downstream sink node;
and transmitting the target event corresponding to the SD alarm to the downstream sink node.
Further, the SR-TP tunnel signaling program, when executed by the processor, further performs the following operations:
acquiring current network topology data, and sending the current network topology data to a controller of a Software Defined Network (SDN);
and sending the SD alarm and the port information to a controller of an SDN (software defined network), so that the controller responds to the SD alarm, acquires a network element node port corresponding to the port information in the current network topology data, and determines a downstream sink node according to the network element node port.
Further, the SR-TP tunnel signaling program, when executed by the processor, further performs the following operations:
and sending the SD alarm and the port information to a controller of an SDN (software defined network), so that the controller responds to the SD alarm, acquires a network element node port corresponding to the port information in the current network topology data, traverses all SR-TP tunnel paths passing through the network element node port according to the current network topology data, acquires tunnel configuration parameters corresponding to each SR-TP tunnel path, and determines downstream sink nodes of each SR-TP tunnel path according to the tunnel configuration parameters.
Further, the SR-TP tunnel signaling program, when executed by the processor, further performs the following operations:
obtaining a local label from a destination node to a source node of each tunnel from the tunnel configuration parameters, and obtaining a label corresponding to the downstream destination node from the local label as an end-to-end service label;
and packaging the end-to-end service label and the target event corresponding to the SD alarm, generating a control command, and sending the control command to the downstream sink node.
Further, the SR-TP tunnel signaling program, when executed by the processor, further performs the following operations:
When a signal degradation SD alarm is detected at the network element inlet end of any node of a segment routing transport subset SR-TP tunnel based on traffic engineering, alarm data corresponding to the SD alarm is sent to an equipment end, so that the equipment end runs a preset polling thread according to an event reporting component, and SD alarm information of an equipment port and port information of the network element inlet end are collected.
Further, the SR-TP tunnel signaling program, when executed by the processor, further performs the following operations:
and receiving the alarm event fed back by the device side, and reporting the alarm event to a controller of a Software Defined Network (SDN), wherein the alarm event is an event generated by the device side according to the SD alarm information and the port information.
Further, the SR-TP tunnel signaling program, when executed by the processor, further performs the following operations:
and receiving the alarm event fed back by the equipment side, and sending the alarm event to a controller of a Software Defined Network (SDN) by using an interface management component on the platform side through an intermediate system to intermediate system (ISIS) protocol.
Further, the SR-TP tunnel signaling program, when executed by the processor, further performs the following operations:
Triggering a preset linear protection switching mechanism of the downstream sink node, and switching the current SR-TP tunnel path of the downstream sink node to a standby SR-TP tunnel path.
According to the scheme, when a signal degradation SD alarm is detected at the network element inlet end of any node of a segment routing transport subset SR-TP tunnel based on traffic engineering, the SD alarm and port information of the network element inlet end are obtained; sending the SD alarm and the port information to a controller of a Software Defined Network (SDN) to obtain a downstream sink node; the target event corresponding to the SD alarm is transmitted to the downstream destination node, most complex network and mixed network topology scenes can be compatible, the application range is wide, no extra OAM message or control field needs to be redefined, message overhead is saved, and transmission efficiency is improved; the method can meet the requirement of triggering linear protection inversion when signal degradation is generated at any position of the SR-TP tunnel link, improves the response efficiency of coping with faults, and ensures the continuity and the fluency of information transmission.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system 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 system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (13)

1. A method for transmitting SR-TP tunnel signals, comprising:
when a signal degradation SD alarm is detected at a network element inlet end of any node of a segment routing transmission subset SR-TP tunnel based on traffic engineering, an SD alarm and port information of the network element inlet end are obtained;
sending the SD alarm and the port information to a controller of a Software Defined Network (SDN) to obtain a downstream sink node;
and transmitting the target event corresponding to the SD alarm to the downstream sink node.
2. The SR-TP tunnel signaling method of claim 1, wherein the sending the SD alarm and the port information to a controller of a Software Defined Network (SDN) to obtain a downstream sink node comprises:
Acquiring current network topology data, and sending the current network topology data to a controller of a Software Defined Network (SDN);
and sending the SD alarm and the port information to a controller of an SDN (software defined network), so that the controller responds to the SD alarm, acquires a network element node port corresponding to the port information in the current network topology data, and determines a downstream sink node according to the network element node port.
3. The SR-TP tunnel signaling method of claim 2, wherein the sending the SD alarm and the port information to a controller of an SDN, so that the controller obtains a network element node port corresponding to the port information in the current network topology data in response to the SD alarm, and determines a downstream sink node according to the network element node port, comprises:
and sending the SD alarm and the port information to a controller of an SDN (software defined network), so that the controller responds to the SD alarm, acquires a network element node port corresponding to the port information in the current network topology data, traverses all SR-TP tunnel paths passing through the network element node port according to the current network topology data, acquires tunnel configuration parameters corresponding to each SR-TP tunnel path, and determines downstream sink nodes of each SR-TP tunnel path according to the tunnel configuration parameters.
4. The SR-TP tunnel signal transfer method of claim 3, wherein the transferring the target event corresponding to the SD alarm to the downstream sink node comprises:
obtaining a local label from a destination node to a source node of each tunnel from the tunnel configuration parameters, and obtaining a label corresponding to the downstream destination node from the local label as an end-to-end service label;
and packaging the end-to-end service label and the target event corresponding to the SD alarm, generating a control command, and sending the control command to the downstream sink node.
5. The SR-TP tunnel signal transferring method of claim 1, wherein the acquiring the SD alarm and the port information at the network element ingress end when the signal degradation SD alarm is detected at the network element ingress end of any node of the SR-TP tunnel based on the segment routing transport subset of traffic engineering, comprises:
when a signal degradation SD alarm is detected at the network element inlet end of any node of a segment routing transport subset SR-TP tunnel based on traffic engineering, alarm data corresponding to the SD alarm is sent to an equipment end, so that the equipment end runs a preset polling thread according to an event reporting component, and SD alarm information of an equipment port and port information of the network element inlet end are collected.
6. The SR-TP tunnel signaling method of claim 5, wherein the sending the SD alarm and the port information to a controller of a Software Defined Network (SDN) comprises:
and receiving the alarm event fed back by the device side, and reporting the alarm event to a controller of a Software Defined Network (SDN), wherein the alarm event is an event generated by the device side according to the SD alarm information and the port information.
7. The SR-TP tunnel signaling method of claim 6, wherein the receiving the alarm event fed back by the device side and reporting the alarm event to a controller of a Software Defined Network (SDN) comprises:
and receiving the alarm event fed back by the equipment side, and sending the alarm event to a controller of a Software Defined Network (SDN) by using an interface management component on the platform side through an intermediate system to intermediate system (ISIS) protocol.
8. The SR-TP tunnel signal transfer method of any one of claims 1-7, wherein after the target event corresponding to the SD alarm is transferred to the downstream sink node, the SR-TP tunnel signal transfer method further comprises:
Triggering a preset linear protection switching mechanism of the downstream sink node, and switching the current SR-TP tunnel path of the downstream sink node to a standby SR-TP tunnel path.
9. An SR-TP tunnel signal transfer apparatus, comprising:
the system comprises a port information acquisition module, a traffic engineering-based segment routing transmission subset SR-TP tunnel and a traffic engineering-based segment routing transmission subset SR-TP tunnel, wherein the port information acquisition module is used for acquiring an SD alarm and port information at the inlet end of a network element when the SD alarm of signal degradation is detected at the inlet end of the network element of any node of the segment routing transmission subset SR-TP tunnel;
the node acquisition module is used for sending the SD alarm and the port information to a controller of a Software Defined Network (SDN) to acquire a downstream sink node;
and the transfer module is used for transferring the target event corresponding to the SD alarm to the downstream sink node.
10. The SR-TP tunnel signaling apparatus of claim 9, wherein the node acquisition module comprises:
the system comprises a topology data acquisition module, a controller and a network interface module, wherein the topology data acquisition module is used for acquiring current network topology data and sending the current network topology data to the controller of the SDN;
and the sink node determining module is used for sending the SD alarm and the port information to a controller of an SDN (software defined network), so that the controller responds to the SD alarm, acquires a network element node port corresponding to the port information in the current network topology data, and determines a downstream sink node according to the network element node port.
11. The SR-TP tunnel signaling apparatus of claim 9, wherein the sink node determining module is further configured to send the SD alarm and the port information to a controller of an SDN, so that the controller, in response to the SD alarm, obtains a network element node port corresponding to the port information in the current network topology data, traverses all SR-TP tunnel paths passing through the network element node port according to the current network topology data, obtains tunnel configuration parameters corresponding to each SR-TP tunnel path, and determines a downstream sink node of each SR-TP tunnel path according to the tunnel configuration parameters.
12. A sliced packet network server, comprising: memory, a processor and a SR-TP tunneling signal transfer program stored on the memory and executable on the processor, the SR-TP tunneling signal transfer program being configured to implement the steps of the SR-TP tunneling signal transfer method according to any of claims 1 to 8.
13. A storage medium having stored thereon an SR-TP tunnel signal transfer program, which when executed by a processor implements the steps of the SR-TP tunnel signal transfer method of any of claims 1-8.
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