CN110247787B - Method, network element and control equipment for establishing flexible Ethernet path - Google Patents

Method, network element and control equipment for establishing flexible Ethernet path Download PDF

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CN110247787B
CN110247787B CN201810191811.2A CN201810191811A CN110247787B CN 110247787 B CN110247787 B CN 110247787B CN 201810191811 A CN201810191811 A CN 201810191811A CN 110247787 B CN110247787 B CN 110247787B
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flexible ethernet
path
node
information
group
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CN110247787A (en
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魏小强
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ZTE Corp
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ZTE Corp
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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
    • H04L45/12—Shortest path evaluation
    • 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
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/12—Shortest path evaluation
    • H04L45/125—Shortest path evaluation based on throughput or bandwidth
    • 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
    • H04L45/24—Multipath
    • H04L45/245—Link aggregation, e.g. trunking
    • 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
    • H04L45/302—Route determination based on requested QoS
    • 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
    • H04L45/38—Flow based routing
    • 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
    • H04L47/72—Admission control; Resource allocation using reservation actions during connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0073—Provisions for forwarding or routing, e.g. lookup tables
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate

Abstract

The embodiment of the invention discloses a method for establishing a flexible Ethernet path, a network element and control equipment, wherein the method comprises the following steps: calculating path information of the flexible Ethernet according to a TE-MIB (traffic engineering database) and path constraint information of the whole network flexible Ethernet group; and creating a flexible Ethernet path according to the calculated path information of the flexible Ethernet. The embodiment of the invention also provides a flexible Ethernet network element and flexible Ethernet control equipment. The embodiment of the invention automatically calculates and configures a flexible Ethernet path by using the full-network flexible Ethernet group TE-MIB, thereby greatly reducing the configuration workload of the flexible Ethernet path and improving the flexible Ethernet service configuration efficiency.

Description

Method, network element and control equipment for establishing flexible Ethernet path
Technical Field
The present application relates to the field of communications, and in particular, to a method, a network element, and a control device for establishing a flexible ethernet path.
Background
The Flexible Ethernet (FlexE, Flexible Ethernet) is a main hardware device carried in 5G (fifth generation mobile communication), and can well meet the requirements of 5G carrying equipment on large capacity and low delay. In the current flexible ethernet version, it is mainly implemented as follows:
an ethernet Physical layer (PHY) with a bandwidth of 100G is uniformly divided into a plurality of time slots, each time slot represents a certain bandwidth, for example: a 100G ethernet PHY is divided into 20 5G (5G bits, representing the communication bandwidth) slots.
Next, 1 to n pieces of 100G ethernet PHYs are bundled to form a flexible ethernet group (FlexE group). Then the total bandwidth of this group is n x 100G, the number of slots is: n 20, the minimum bandwidth granularity is the bandwidth of each slot, i.e. 5 Gbit.
Several time slots on this ethernet group then constitute a client (client) carrying user traffic. The bandwidth of each client (client) is 5G slots. As shown in fig. 1.
Flexible ethernet clients (clients) of a plurality of devices form a path (path) through time slot (TimeSlot) intersection, and the path is used for bearing user service traffic. As shown in fig. 1, nodes a, B, and C are networked through a flexible ethernet port, the first node a performs service from client 1(client1), the middle node B configures timeslot crossing, and after client 1(client1) crosses client 8(client8), the traffic of client 1(client1) can be directly sent to client 8(client 8).
By the method, the flexible Ethernet provides a channel with flexible and allocable bandwidth for users. While it is extremely flexible, we also find the complexity of its configuration work. Especially in 5G mass bearing, the realization of high-efficiency and high-quality service configuration has strategic significance.
Disclosure of Invention
The embodiment of the invention provides a method for establishing a flexible Ethernet path, which comprises the following steps:
calculating path information of the flexible Ethernet according to a TE-MIB (traffic engineering database) and path constraint information of the whole network flexible Ethernet group;
and creating a flexible Ethernet path according to the calculated path information of the flexible Ethernet.
The embodiment of the present invention further provides a flexible ethernet network element, which includes a memory and a processor, where the memory is used to store a data processing program, and the data processing program, when executed by the processor, implements the steps of the method for establishing a flexible ethernet path according to the embodiment of the present invention.
The embodiment of the present invention further provides a flexible ethernet control device, which includes a memory and a processor, where the memory is used to store a data processing program, and the data processing program, when executed by the processor, implements the steps of the method for establishing a flexible ethernet path according to the embodiment of the present invention.
The embodiment of the invention calculates the path Information of the flexible Ethernet according to a TE-MIB (Traffic Engineering MIB) and path constraint Information of a full-network flexible Ethernet group; and creating a flexible Ethernet path according to the calculated path information of the flexible Ethernet. In the embodiment of the invention, a flexible Ethernet path is automatically calculated and configured by using the full-network flexible Ethernet group TE-MIB, so that the configuration workload of the flexible Ethernet path is greatly reduced, and the flexible Ethernet service configuration efficiency is improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is a schematic diagram of a flexible Ethernet hierarchical port;
FIG. 2 is a flowchart of a method for flexible Ethernet path establishment according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating a flexible Ethernet path creation process according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating an apparatus for flexible Ethernet path establishment according to an embodiment of the present invention;
FIG. 5 is a schematic diagram illustrating interaction of modules in an apparatus for flexible Ethernet path establishment according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a flexible Ethernet path formed by crossing time slots in a flexible Ethernet;
FIG. 7 is a schematic diagram of a deployment example of the present invention;
FIG. 8 is a schematic diagram of a second deployment example of the present invention;
FIG. 9 is a schematic diagram of a third deployment of an application example of the present invention.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail 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.
The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.
As shown in fig. 2, a method for establishing a flexible ethernet path according to an embodiment of the present invention includes:
step 101, calculating path information of the flexible Ethernet according to the TE-MIB and the path constraint information of the full-network flexible Ethernet group.
In one embodiment, the path constraint information includes: first node information, last node information and constraint condition information; the constraint condition information includes at least one of the following information: path bandwidth information, must pass node information, and avoid node information; the path information includes: a list of network element nodes and flexible Ethernet group information; the flexible ethernet group information at least includes flexible ethernet group identification information, and may also include port information corresponding to each flexible ethernet group, where each port information may include information such as a port identification and a timeslot identification corresponding to each port.
Before step 101, the method may further include:
and constructing a full-network flexible Ethernet group TE-MIB.
The TE-MIB is equivalent to a state map of TE (Traffic Engineering) information of a flexible ethernet group, each device node in a network holds one such TE state map of the whole network, and according to the map, any node can calculate a path meeting specific conditions, that is, according to the map, a flexible ethernet path meeting specific requirements can be established between any two nodes.
In an embodiment, the local flexible ethernet group TE-MIB information of each network element is summarized to form the full-network flexible ethernet group TE-MIB.
That is, the full-network flexible ethernet group TE-MIB is summarized from the local flexible ethernet group TE-MIB information of each network element.
In an embodiment, before the local flexible ethernet group TE-MIB information of each network element is summarized, the local flexible ethernet group TE-MIB information is configured.
Each network element may configure its own local flexible ethernet group TE-MIB information, which may include but is not limited to: node Identification (ID) information, TE state information and group connection relationship information, wherein the TE state information may include but is not limited to: group information and slot information.
In an embodiment, local flexible ethernet group TE-MIB information is flooded.
The TE information of the flexible ethernet may be configured into an Inter Gateway Protocol (IGP) that supports TE of the flexible ethernet after expansion, so as to obtain a local flexible ethernet group TE-MIB. And diffusing the local TE-MIB information to the whole network through an extended IGP protocol so as to form the whole network flexible Ethernet group information synchronization. The extension of the IGP means that the IGP protocol is extended to support the flooding of the TE information of the flexible ethernet group.
The embodiment of the invention can be applied to network elements or control equipment (such as network management or controllers) of the flexible Ethernet, if the embodiment is applied to the network elements, each network element obtains the local flexible Ethernet group TE-MIB information of other network elements through flooding, and then the TE-MIB information of the whole network flexible Ethernet group is obtained through summarization. If the embodiment is applied to the control equipment, flooding is not needed, and the control equipment receives and summarizes the local flexible Ethernet group TE-MIB information reported by each network element to obtain the full-network flexible Ethernet group TE-MIB.
In an embodiment, when the local flexible ethernet group TE-MIB information of any network element changes, the full-network flexible ethernet group TE-MIB is updated.
E.g. time slots become used from unused or available or not, etc., the network-wide TE-MIBs of the remaining nodes are all aware and the respective TE-MIBs are updated.
In one embodiment, the step 101 includes:
according to the first node and the last node of the path required by the user and the current constraint condition information, such as the path bandwidth, the nodes which must pass through or the nodes which are avoided, and the like, the TE-MIB information is combined, and the network element node list which meets the constraint condition and the Ethernet group on the network element node list are calculated according to the path algorithm. The Path algorithm may adopt various algorithms, such as a CSPF (Constrained Shortest Path First) algorithm.
And 102, creating a flexible Ethernet path according to the calculated path information of the flexible Ethernet.
The flexible ethernet path may be a unidirectional path or a bidirectional path.
The embodiment of the present invention may be applied to a network element of a flexible ethernet, and may also be applied to a control device (e.g., a network manager or a controller) of the flexible ethernet, or the network element of the flexible ethernet and the control device may jointly execute the embodiment of the present invention.
When the embodiment of the present invention is applied to a network element of a flexible ethernet network, step 102 may include:
when the network element is the first node on the flexible Ethernet path, sending a path establishment request message to a downstream node according to the path information; receiving a response message sent by the downstream node, and configuring the reserved time slot to a hardware register;
when the network element is the last node on the flexible Ethernet path, receiving a path establishment request message sent by an upstream node, performing resource check, reserving time slot resources, configuring reserved time slots to a hardware register, and sending a response message to the upstream node;
when the network element is a node except the first node and the last node on the flexible Ethernet path, receiving a path establishment request message sent by an upstream node, performing resource check, reserving time slot resources, and sending the path establishment request message to a downstream node; and receiving a response message sent by the downstream node, configuring the reserved time slot and the time slot crossing information to a hardware register, and sending the response message to the upstream node.
As shown in fig. 3, when the embodiment of the present invention is applied to a network element of a flexible ethernet network, creating a flexible ethernet path may include the following steps:
(1) a path creation request message (i.e., a path setup request message) is sent from the head node to the second node.
(2) And after receiving the path creation request message of the upstream node, the second node checks the local flexible Ethernet group manager, confirms that the bandwidth request of the upstream node can be met, and reserves time slot resources.
(3) (5) the second node sends a path creation request message to a third node of the node list, and the third node also executes the operation similar to the second node after receiving the message; and so on.
(6) And after the penultimate node receives the path establishment request message of the upstream node, checking the local flexible Ethernet group manager, confirming that the bandwidth request of the upstream node can be met, and reserving time slot resources.
(7) The penultimate node sends a path creation request message to the end node.
(8) When the end node receives the path establishing request message, the end node checks that the local flexible Ethernet group manager meets the bandwidth request of the upstream node, then reserves the time slot resource, and then configures the reserved time slot to the hardware.
(9) And the last node responds to the penultimate node, and the time slot resource reservation is successful.
(10) And after the penultimate node receives the successful response of the last node, allocating time slots according to the response of the last node, allocating the time slots connected with the flexible Ethernet group of the node and configuring hardware, then allocating reserved time slot resources of the penultimate node and the penultimate node flexible Ethernet group and configuring hardware. The penultimate node configures the slot crossing. I.e. the inbound slots are crossed over to the inbound slots at the penultimate node. More specifically, at the penultimate node, the time slots from the penultimate node are crossed over to the time slots to the end node.
(11) And the penultimate node responds to the penultimate node and the time slot resource reservation information.
(12) And (15) after the last but one node receives the last but one node successful response message, the last but one node sequentially executes the operation similar to the last but one node and then responds to the upstream node. And so on to the first node.
(16) After receiving the response success message of the second node, the first node allocates the same time slot on the Ethernet group connected with the first node according to the time slot of the second node.
Thus, path creation on the flexible ethernet group is successful.
The above is a creation mode of a unidirectional flexible ethernet path, and a creation mode of a bidirectional flexible ethernet group is similar to the above, and the main difference is that an upstream node initiates a path request and simultaneously carries local resource information, so that a downstream node reversely establishes a flexible ethernet group path. The establishing process of the single-direction and two-direction paths is similar in nature, and the detail processing is slightly different.
In addition, some more detailed parameters related to flexible ethernet group communication, such as PHY number, client number, etc., may also carry configuration during the flexible ethernet group path establishment process.
When the embodiment of the present invention is applied to a control device of a flexible ethernet network, step 103 may include:
and the control equipment generates a time slot resource configuration command of each node on the flexible Ethernet path and a time slot cross configuration command except the head node and the tail node according to the calculated path information of the flexible Ethernet, and sends the time slot resource configuration command and the time slot cross configuration command to the corresponding nodes.
In an embodiment, the control device may be provided with a virtual network element corresponding to each network element, and when the calculated path information of the flexible ethernet is obtained, the control device obtains each virtual node on the flexible ethernet path according to the path information, where step 103 may include:
the control equipment sends path establishment request messages to virtual downstream nodes in sequence from a virtual head node on the flexible Ethernet path on the control equipment according to the calculated path information of the flexible Ethernet, and the virtual downstream nodes receive the path establishment request messages and reserve time slot resources; the virtual end node on the control equipment receives the path establishment request message, reserves time slot resources, records a time slot resource configuration command, and starts from the virtual end node, the virtual downstream node sequentially sends a response message to the virtual upstream node, the virtual upstream node receives the response message and records the corresponding time slot resource configuration command until the virtual first node receives the response message, and the control equipment sequentially sends the time slot resource configuration command to the corresponding actual node.
In an embodiment, when the virtual network element on the flexible ethernet path is a non-virtual head-end node, after the virtual upstream node receives the response message, the method further includes: recording a time slot cross configuration command; after receiving the response message, the virtual head node further includes: and the control equipment sequentially sends the time slot cross configuration command to the corresponding actual nodes.
In the embodiment of the invention, a flexible Ethernet channel Cross Connection Path (Flexe Path Cross Connection Path) is automatically calculated and configured by using the full-network flexible Ethernet group TE-MIB, so that the configuration workload of the flexible Ethernet Path is greatly reduced, and the flexible Ethernet service configuration efficiency is improved.
As shown in fig. 4, the apparatus for establishing a flexible ethernet path according to the embodiment of the present invention includes: a flexible ethernet path computation module 41 and a flexible ethernet manager 42, wherein,
the flexible ethernet path calculation module 41 is configured to calculate path information of a flexible ethernet according to a full-network flexible ethernet group TE-MIB and path constraint information;
the flexible ethernet manager 42 is configured to create a flexible ethernet path according to the calculated path information of the flexible ethernet.
In the embodiment of the invention, a flexible Ethernet path is automatically calculated and configured by using the full-network flexible Ethernet group TE-MIB, so that the configuration workload of the flexible Ethernet path is greatly reduced, and the flexible Ethernet service configuration efficiency is improved.
In one embodiment, the apparatus further comprises: a flexible ethernet group TE-MIB module 43,
the flexible ethernet group TE-MIB module 43 is used to construct a full-network flexible ethernet group TE-MIB.
In one embodiment, the flexible ethernet group TE-MIB module 43 includes a full-network flexible ethernet group TE-MIB module 431,
the full-network flexible ethernet group TE-MIB module 431 is configured to summarize local flexible ethernet group TE-MIB information of each network element to form the full-network flexible ethernet group TE-MIB.
In one embodiment, the flexible ethernet group TE-MIB module 43 further comprises a local flexible ethernet group TE-MIB module 432,
the local flexible ethernet group TE-MIB module 432 is configured to configure local flexible ethernet group TE-MIB information of the local network element.
Each network element may configure its own local flexible ethernet group TE-MIB information, which may include but is not limited to: node Identification (ID) information, TE state information and group connection relationship information, wherein the TE state information may include but is not limited to: group information and slot information.
In one embodiment, the apparatus further comprises an extended interior gateway protocol module 44,
the extended interior gateway protocol module 44 is configured to diffuse the local flexible ethernet group TE-MIB information to other network elements through a flooding mechanism, and learn the local flexible ethernet group TE-MIB information of other network elements.
The apparatus of the embodiment of the present invention may be applied to a network element or a control device (e.g., a network manager or a controller) of a flexible ethernet network, and if the apparatus is applied to the control device, the interior gateway protocol module 44 does not need to be extended.
When the device of the embodiment of the invention is applied to the network element of the flexible Ethernet, the TE information of the flexible Ethernet can be configured to the extended IGP supporting the TE of the flexible Ethernet, and the local flexible Ethernet group TE-MIB is obtained. And diffusing the local TE-MIB information to the whole network through an extended IGP protocol so as to form the whole network flexible Ethernet group information synchronization.
In one embodiment, the path constraint information includes: first node information, last node information and constraint condition information; the constraint condition information includes at least one of the following information: path bandwidth information, must pass node information, and avoid node information; the path information includes: a network element node list and flexible Ethernet group information, wherein the flexible Ethernet group information at least comprises flexible Ethernet group identification information.
The flexible ethernet path calculation module 41 calculates a network element node list and an ethernet group thereon that satisfy the constraint condition according to the path algorithm, based on the first and last nodes of the path required by the user and the current constraint condition information, such as the path bandwidth, the nodes that must pass through, or the nodes that are avoided, in combination with the TE-MIB information. The path algorithm may employ various algorithms, such as the CSPF algorithm.
In one embodiment, the flexible ethernet manager 42 includes a flexible ethernet path manager 421 and a flexible ethernet group manager 422.
The flexible ethernet path manager 421 is used to initiate or pass through a path setup request.
The flexible ethernet group manager 422 is configured to manage the corresponding relationship and the time slot relationship of the flexible ethernet group resources between two physically adjacent devices.
The flexible ethernet manager 42 may be disposed on a network element of the flexible ethernet, or may be disposed on a control device (e.g., a network manager or a controller) of the flexible ethernet.
When the flexible ethernet manager 42 is disposed on a network element of a flexible ethernet:
when the flexible ethernet manager 42 is located at the head node on the flexible ethernet path, the flexible ethernet path manager 421 is configured to send a path establishment request message to a downstream node according to the calculated path information of the flexible ethernet; receiving a response message sent by the downstream node, and sending the response message to the flexible Ethernet group manager; the flexible ethernet group manager 422 is configured to configure a reserved time slot to a hardware register according to the response message;
when the flexible ethernet manager 42 is located at the end node on the flexible ethernet path, the flexible ethernet path manager 421 is configured to receive a path establishment request message sent by an upstream node, and send the path establishment request message to the flexible ethernet group manager 422; the flexible ethernet group manager 422 is configured to perform resource check, reserve time slot resources, and configure a reserved time slot to a hardware register; the flexible ethernet path manager 421 is further configured to send a response message to an upstream node;
when the flexible ethernet manager 42 is located at a node on the flexible ethernet path except the head-end node, the flexible ethernet path manager 421 is configured to receive a path establishment request message sent by an upstream node, and send the path establishment request message to the flexible ethernet group manager 422; the flexible ethernet group manager 422 is configured to perform resource check according to the path establishment request message, and reserve a time slot resource; the flexible ethernet path manager 421 is further configured to send the path establishment request message to a downstream node, receive a response message sent by the downstream node, and send the response message to the flexible ethernet group manager 422; the flexible ethernet group manager 422 is further configured to reserve a time slot for configuration to a hardware register according to the response message; the flexible ethernet path manager 421 is also used to send a reply message to an upstream node.
In one embodiment, when the flexible ethernet manager 42 is located at a node other than the head-end node on the flexible ethernet path, the flexible ethernet group manager 422 is further configured to configure time slot crossing information according to the response message.
When the flexible ethernet manager 42 is disposed on a controller of a flexible ethernet:
in one embodiment, the flexible ethernet manager 42 includes a flexible ethernet path manager 421 and a flexible ethernet group manager 422, wherein,
when the flexible ethernet manager 42 is located at a virtual head node on the flexible ethernet path of the control device, the flexible ethernet path manager 421 is configured to send a path establishment request message to a virtual downstream node according to the calculated path information of the flexible ethernet; and, receive the response message that the virtual downstream node sends, send to the flexible ethernet group manager 422; the flexible ethernet group manager 422 is configured to record a time slot resource configuration command according to the response message;
when the flexible ethernet manager 42 is located at the last virtual node on the flexible ethernet path of the control device, the flexible ethernet path manager 421 is configured to receive a path establishment request message sent by a virtual upstream node, and send the path establishment request message to the flexible ethernet group manager 422; the flexible ethernet group manager 422 is configured to perform resource check, reserve time slot resources, and record a time slot resource configuration command; the flexible ethernet path manager 421 is further configured to send a response message to the virtual upstream node;
when the flexible ethernet manager 42 is located in a virtual node other than the virtual head-end node on the flexible ethernet path of the control device, the flexible ethernet path manager 421 is configured to receive a path establishment request message sent by a virtual upstream node, and send the path establishment request message to the flexible ethernet group manager 422; the flexible ethernet group manager 422 is configured to perform resource check according to the path establishment request message, and reserve a time slot resource; the flexible ethernet path manager 421 is further configured to send the path establishment request message to the virtual downstream node, receive a response message sent by the virtual downstream node, and send the response message to the flexible ethernet group manager 422; the flexible ethernet group manager 422 is further configured to record a time slot resource configuration command according to the response message; the flexible ethernet path manager 421 is also used to send a reply message to an upstream node.
In an embodiment, when the flexible ethernet manager 42 is located in a virtual node other than the virtual head-end node on the flexible ethernet path of the control device, the flexible ethernet group manager 422 is further configured to record a timeslot crossing configuration command according to the response message.
The apparatus for establishing a flexible ethernet path according to the embodiment of the present invention may be deployed on a network element of a flexible ethernet, or may be deployed on a control device (e.g., a network manager or a controller) of the flexible ethernet, or may be partially deployed on a network element of the flexible ethernet, or partially deployed on a control device of the flexible ethernet, or may be repeatedly deployed on a network element and a control device of the flexible ethernet, for example, a flexible ethernet group TE-MIB module 43, a flexible ethernet path calculation module 41, and a flexible ethernet manager 42 are deployed on the control device of the flexible ethernet, and a flexible ethernet group TE-MIB module 43 and an extended interior gateway protocol module 44 are deployed on the network element of the flexible ethernet.
As shown in fig. 5, the schematic interaction diagram of each module in the apparatus for establishing a flexible ethernet path according to the embodiment of the present invention includes the following steps:
step 501, the flexible ethernet path manager 421 issues the first and last nodes and the path constraint condition information to the flexible ethernet path calculation module 41;
step 502, the flexible ethernet path computation module 41 queries the whole network node and bandwidth information from the whole network flexible ethernet group TE-MIB module 431;
step 503, the whole network flexible ethernet group TE-MIB module 431 responds to the flexible ethernet path calculation module 41 with the whole network node and bandwidth information;
step 504, the flexible ethernet path calculation module 41 calculates a path node list and an egress interface that satisfy the conditions;
step 505, the flexible ethernet path calculation module 41 responds to the flexible ethernet path manager 421 with the list of path nodes and the egress interface that satisfy the condition;
in step 506, the flexible ethernet path manager 421 sends the path node list and the egress interface that satisfy the condition to the flexible ethernet group manager 422, so that the flexible ethernet group manager 422 performs near-far resource check and path creation.
Several application examples are described below.
Application example one (application example deployed on flexible Ethernet network element)
Fig. 6 is a network networking diagram of a first application example of the present invention, and fig. 7 is a diagram of an implementation manner of an embodiment of the present invention deployed on an ethernet network element (communication device). The application example mainly comprises the following steps:
step 701: the devices PE1, P2, P3 and PE4 form a communication network, and are interconnected through flexible Ethernet ports. And each network element configures the flexible Ethernet group information into the flexible Ethernet group manager. The ethernet group information includes an ethernet group ID, a group slot status, and the like. And then the group manager uses the path manager to check the Ethernet group resources of the far and near devices so as to form a far and near interconnection flexible Ethernet group pair.
Step 702: TE-MIB of local flexible ethernet group is created on network elements PE1, P2, P3, PE 4. On each device, the traffic engineering information (TE) of the flexible ethernet is configured into an Internal Gateway Protocol (IGP) that is extended to support the flexible ethernet traffic engineering, so as to obtain a local flexible ethernet group TE-MIB. Wherein the traffic engineering information comprises: node ID, flexible ethernet group, total available bandwidth on the ethernet group, etc. For example: device PE1 node, group1, bandwidth: 100G.
Step 703: and diffusing the local TE-MIB information to the whole network through an extended IGP protocol so as to form the whole network flexible Ethernet group information synchronization. The extension of the IGP means that the IGP protocol is extended to support the flooding of the TE information of the flexible ethernet group. For example, the Open Shortest Path First (OSPF) protocol is extended, and a new LSA (Link-State Advertisement) type is added to describe TE information of the flexible ethernet; the LSA of IS-IS (Intermediate System-to-Intermediate System) protocol may also be extended to support flexible ethernet group TE information. Of course, other extensions to the interior gateway protocol may be used in order to achieve network-wide TE-MIB synchronization. For example: an interior gateway protocol on the PE1 network element floods and learns the traffic engineering of the flexible Ethernet group of other network elements to form a TE-MIB; similarly, other network elements, for example: p2, P3, PE4 also learn the traffic engineering of the flexible ethernet group to the other network elements through interior gateway protocol flooding and form the whole network TE-MIB.
Step 704: the user configures commands to the PE1 device to create a flexible ethernet path. The bandwidth of the path head node PE1 and the bandwidth of the path tail node PE4 are 10G.
Step 705: the network element PE1 executes a CSPF algorithm according to the bandwidth of the path, the first node information and the last node information and by combining the whole network TE-MIB to obtain a flexible Ethernet group path node list and an access group; for example, in this example, the calculated path node list is: PE1, P2, P3, PE 4. The outlet ethernet group on PE1 is group1, the outlet ethernet group on P2 is group2, and the outlet ethernet group on P3 is group 5.
Step 706: the path manager at network element PE1 begins initiating a flexible ethernet path setup.
The path manager on the head node PE1 initiates a path setup request message to the next hop node P2, the main fields of the request content are: the outbound group is group1, 10G bandwidth.
After receiving the path establishment request, the second node P2 queries the flexible ethernet group manager to obtain the group1 communication between the local node group1 and the node PE1, and checks that the available bandwidth of the flexible ethernet group1 of the local network element is greater than 10G, and then pre-allocates 2 slots 3 and 5, that is, 10G bandwidth. Next, a path establishment request is sent to the next hop node P3, and the request contents are: the outbound flexible ethernet group is group2, 10G bandwidth.
After receiving the path request of the upstream node P2, the third node P3 first queries the flexible ethernet manager to obtain the group3 of the node and the group2 of the node P2 for communication, checks that the available bandwidth of the flexible ethernet group3 of the local network element is greater than 10G, and then pre-allocates 2 slots 1 and 2, that is, 10G bandwidth. A path setup request is then sent to the next hop node PE4, the request being: the outbound flexible ethernet group is group5, 10G bandwidth.
After receiving the path request of the upstream node P3, the fourth node PE4 first queries the flexible ethernet group manager to obtain the group1 of the local node and the group5 of the P3 node for communication, and checks that the available bandwidth of the flexible ethernet group1 of the local network element is greater than 10G. Then 2 slots 2 and 4, i.e. 10G bandwidth, are pre-allocated. At the same time PE4 checks that it is an end-of-path node and writes slots 2 and 4 to the hardware registers. Finally, in response to the P3 node, the time slots are allocated as 2 and 4.
When node P3 receives the path setup success acknowledgement from PE4 and allocates slots 2 and 4, slots 2 and 4 are allocated on the local egress flexible ethernet group5 and the hardware registers are written. Then, the intersection between the time slots 1 and 2 of the group3 to the time slots 2 and 4 of the group5 is established on the equipment, and the hardware register is issued. Finally, the P3 node acknowledges that the P2 node slot assignments are 1 and 2.
When node P2 receives the path setup success acknowledgement of P3 and allocates slots 1 and 2, slots 1 and 2 are allocated on the local egress flexible ethernet group2 and the hardware registers are written. Then, the intersection between the time slots 3 and 5 of the group1 to the time slots 1 and 2 of the group2 is established on the equipment, and the hardware register is issued. Finally, the reply PE1 node time slots are allocated as 3 and 5.
When the node PE1 receives the path setup success acknowledgement of P2 and allocates slots 3 and 5, slots 3 and 5 are allocated on the local egress flexible ethernet group1 and the hardware registers are written.
To this end, a flexible ethernet path with a bandwidth of 10G from PE1 to PE4 was successfully established.
Application example two (application example deployed on flexible Ethernet control equipment (network management or controller))
As shown in fig. 6 and fig. 8, the devices PE1, P2, P3, and PE4 form a communication network, and are interconnected by flexible ethernet ports, which is described by taking the embodiment of the present invention deployed in a controller as an example, and mainly include the following steps:
step 801: the equipment PE1, P2, P3 and PE4 respectively report the flexible Ethernet group, the time slot state information and the flexible Ethernet group pair relationship of the adjacent network elements to the controller;
step 802: the controller is provided with a virtual network element corresponding to each network element. After receiving the flexible ethernet group information in step 801, adding the flexible ethernet group information to the flexible ethernet group manager of each virtual network element;
step 803: the controller constructs a full-network flexible Ethernet group TE-MIB. Wherein each TE-MIB comprises information such as node ID, flexible Ethernet group, available bandwidth and the like;
step 804: the user configures commands to the PE1 device to create a flexible ethernet path. The bandwidth of the path head node PE1 and the bandwidth of the path tail node PE4 are 10G;
step 805: according to the bandwidth of the Path and the information of the head and tail nodes, the controller executes a CSPF (Constrained short Path First) algorithm by combining with a full-network TE-MIB to obtain a flexible Ethernet group Path node list and an access group; for example, in this example, the calculated path node list is: PE1, P2, P3, PE 4. The outlet ethernet group on PE1 is group1, the outlet ethernet group on P2 is group2, and the outlet ethernet group on P3 is group 5.
Step 806: the path manager on the controller initiates the flexible ethernet path setup on PE 1.
On the controller, the path manager on the head node PE1 initiates a path establishment request message to the next hop node P2, and the main fields of the request content are: go out to group1, 10G bandwidth.
On the controller, after receiving the path establishment request, the second node P2 queries the flexible ethernet manager to obtain the group1 of the node and the group1 of the node PE1 for communication, checks that the available bandwidth of the flexible ethernet group1 of the local network element is greater than 10G, and pre-allocates 2 slots 3 and 5, that is, 10G bandwidth. Next, a path establishment request is sent to the next hop node P3, and the request contents are: the outbound flexible ethernet group is group2, 10G bandwidth.
On the controller, after receiving the path request of the upstream node P2, the third node P3 queries the flexible ethernet manager to obtain the group3 of the node and the group2 of the node P2, checks that the available bandwidth of the flexible ethernet group3 of the local network element is greater than 10G, and pre-allocates 2 slots 1 and 2, that is, 10G bandwidth. A path setup request is then sent to the next hop node PE4, the request being: the outbound flexible ethernet group is group5, 10G bandwidth.
On the controller, after receiving the path request of the upstream node P3, the fourth node PE4 queries the flexible ethernet group manager to obtain the group1 of the local node and the group5 of the P3 node, checks that the available bandwidth of the flexible ethernet group1 of the local network element is greater than 10G, and pre-allocates 2 slots 2 and 4, that is, 10G bandwidth. Meanwhile, PE4 checks that it is the end-of-path node, and records command (1): slots 2 and 4 are allocated on group1 on PE 4. Following acknowledgement P3, the time slots are allocated 2 and 4.
On the controller, when node P3 receives the path setup success acknowledgement from PE4 and allocates slots 2 and 4, it allocates slots 2 and 4 on the local egress flexible ethernet group5 and records the command (2): group3 allocates slots 1 and 2 on P3; group5 allocates slots 2 and 4. Then the intersection between slots 1 and 2 of group3 to slots 2 and 4 of group5 is established on the present device and the command is recorded (3): slots 1 and 2 of group3 on the P3 node intersect to 2 and 4 of group 5. Finally, the P3 node acknowledges that the P2 node slot assignments are 1 and 2.
On the controller, when node P2 receives the path setup success acknowledgement of P3 and allocates slots 1 and 2, it allocates slots 1 and 2 on the local egress flexible ethernet group2 and records the command (4): slots 3 and 5 are allocated on group1 and slots 1 and 2 are allocated on group2 on the P2 node. Then the intersection between slots 3 and 5 of group1 to slots 1 and 2 of group2 is established on the present device and the command is recorded (5): slots 3 and 5 of group1 on the P2 node cross over slots 1 and 2 of group 2. Finally, the reply PE1 node time slots are allocated as 3 and 5.
When the node PE1 receives the path setup success acknowledgement of P2 and allocates slots 3 and 5, slots 3 and 5 are allocated on the local egress flexible ethernet group1 and the command is recorded (6): group1 on node PE1 allocates slots 3 and 5 and is the entry to the path.
Step 807: the controller sequentially issues configuration commands (1) - (6) to corresponding actual nodes;
step 808: the flexible ethernet path with 10G bandwidth from PE1 to PE4 was successfully established.
Application example three (application example deployed on flexible Ethernet network element and control device)
The embodiment of the invention can also deploy the gathering function of the TE-MIB information of the flexible Ethernet group on the network element (communication equipment), and deploy the calculation function of the flexible Ethernet path on the control equipment, so as to achieve the purposes that the controller can sense the TE update of the flexible Ethernet group in time and improve the calculation effect.
As shown in fig. 6 and fig. 9, the devices PE1, P2, P3, PE4 form a communication network, and are interconnected by flexible ethernet ports, wherein a summary of TE-MIB is deployed on the devices, a flexible ethernet path computation function is deployed on the controller, and the TE-MIB is synchronized by communication between the devices and the controller through an extended BGP protocol, such as BGP-LS (RFC7752), which mainly includes the following steps:
step 901: the equipment PE1, P2, P3 and PE4 respectively report the flexible Ethernet group, the time slot state information and the flexible Ethernet group pair relationship of the adjacent network elements to the controller;
step 902: after receiving the flexible ethernet group information in step 901, the controller adds the flexible ethernet group information to the flexible ethernet group manager of each network element;
step 903: the network elements PE1, P2, P3, PE4 create the TE-MIB of the local flexible ethernet group. On each device, the traffic engineering information (TE) of the flexible ethernet is configured into an Internal Gateway Protocol (IGP) that is extended to support the flexible ethernet traffic engineering, so as to obtain a local flexible ethernet group TE-MIB. Wherein the traffic engineering information comprises: node ID, flexible ethernet group, total available bandwidth on the ethernet group, etc. For example: device PE1 node, group1, bandwidth: 100G.
Step 904: and diffusing the local TE-MIB information to the whole network through an extended IGP protocol so as to form the whole network flexible Ethernet group information synchronization. The extension of the IGP means that the IGP protocol is extended to support the flooding of the TE information of the flexible ethernet group. For example, the Open Shortest Path First (OSPF) protocol is extended, and a new LSA (Link-State Advertisement) type is added to describe TE information of the flexible ethernet; the LSA of IS-IS (Intermediate System-to-Intermediate System) protocol may also be extended to support flexible ethernet group TE information. Of course, other extensions to the interior gateway protocol may be used in order to achieve network-wide TE-MIB synchronization. For example: an interior gateway protocol on the PE1 network element floods and learns the traffic engineering of the flexible Ethernet group of other network elements to form a TE-MIB; similarly, other network elements, for example: p2, P3, PE4 also learn the traffic engineering of the flexible ethernet group to the other network elements through interior gateway protocol flooding and form the whole network TE-MIB.
Step 905: the first section of PE1 point uses the expanded BGP protocol to announce the TE-MIB of the whole network to the controller;
step 906: saving a whole network summary TE-MIB on a controller;
step 907: the user configures commands to the PE1 device to create a flexible ethernet path. The bandwidth of the path head node PE1 and the bandwidth of the path tail node PE4 are 10G;
step 908: the controller executes a CSPF algorithm according to the bandwidth of the path, the first node information and the last node information and the TE-MIB information of the whole network to obtain a flexible Ethernet group path node list and an access group; for example, in this example, the calculated path node list is: PE1, P2, P3, PE 4. Wherein the egress ethernet group on PE1 is group 1; the egress ethernet group on P2 is group2, and the ingress ethernet group is group 1; the egress ethernet group on P3 is group5, and the ingress ethernet group is group 3; the ingress ethernet group on PE4 is group 1.
Step 909: the path manager on PE1 on the controller initiates the flexible ethernet path setup;
on the controller, the path manager on the head node PE1 initiates a path establishment request message to the next hop node P2, and the main fields of the request content are: go out to group1, 10G bandwidth.
On the controller, after receiving the path establishment request, the second node P2 queries the flexible ethernet manager to obtain the group1 of the node and the group1 of the node PE1 for communication, checks that the available bandwidth of the flexible ethernet group1 of the local network element is greater than 10G, and pre-allocates 2 slots 3 and 5, that is, 10G bandwidth. Next, a path establishment request is sent to the next hop node P3, and the request contents are: the outbound flexible ethernet group is group2, 10G bandwidth.
On the controller, after receiving the path request of the upstream node P2, the third node P3 queries the flexible ethernet manager to obtain the group3 of the node and the group2 of the node P2, checks that the available bandwidth of the flexible ethernet group3 of the local network element is greater than 10G, and pre-allocates 2 slots 1 and 2, that is, 10G bandwidth. A path setup request is then sent to the next hop node PE4, the request being: the outbound flexible ethernet group is group5, 10G bandwidth.
On the controller, after receiving the path request of the upstream node P3, the fourth node PE4 queries the flexible ethernet group manager to obtain the group1 of the local node and the group5 of the P3 node, checks that the available bandwidth of the flexible ethernet group1 of the local network element is greater than 10G, and pre-allocates 2 slots 2 and 4, that is, 10G bandwidth. Meanwhile, PE4 checks that it is the end-of-path node, and records command (1): slots 2 and 4 are allocated on group1 on PE 4. Following acknowledgement P3, the time slots are allocated 2 and 4.
On the controller, when node P3 receives the path setup success acknowledgement from PE4 and allocates slots 2 and 4, it allocates slots 2 and 4 on the local egress flexible ethernet group5 and records the command (2): group3 allocates slots 1 and 2 on P3; group5 allocates slots 2 and 4. Then the intersection between slots 1 and 2 of group3 to slots 2 and 4 of group5 is established on the present device and the command is recorded (3): slots 1 and 2 of group3 on the P3 node intersect to 2 and 4 of group 5. Finally, the P3 node acknowledges that the P2 node slot assignments are 1 and 2.
On the controller, when node P2 receives the path setup success acknowledgement of P3 and allocates slots 1 and 2, it allocates slots 1 and 2 on the local egress flexible ethernet group2 and records the command (4): slots 3 and 5 are allocated on group1 and slots 1 and 2 are allocated on group2 on the P2 node. Then the intersection between slots 3 and 5 of group1 to slots 1 and 2 of group2 is established on the present device and the command is recorded (5): slots 3 and 5 of group1 on the P2 node cross over slots 1 and 2 of group 2. Finally, the reply PE1 node time slots are allocated as 3 and 5.
When the node PE1 receives the path setup success acknowledgement of P2 and allocates slots 3 and 5, slots 3 and 5 are allocated on the local egress flexible ethernet group1 and the command is recorded (6): group1 on node PE1 allocates slots 3 and 5 and is the entry to the path.
Step 910: the controller sequentially issues configuration commands (1) - (6) to corresponding nodes;
step 920: the flexible ethernet path with 10G bandwidth from PE1 to PE4 was successfully established.
Application example four (embodiment for establishing a bidirectional path on a flexible Ethernet network element)
As previously described, embodiments of the present invention may also create flexible ethernet bi-directional paths. Networking as shown in fig. 6, devices PE1, P2, P3, and PE4 form a communication network. For the flexible ethernet group manager, the process of creating the ethernet group TE-MIB is described in embodiments one, two, and three. The creation process of the flexible ethernet bi-directional path is described here by taking the example of the deployment of the embodiment of the present invention on a network element (communication device). The method mainly comprises the following steps:
step 1001: the user configures commands to the PE1 device to create a flexible ethernet path. The bandwidth of the path head node PE1 and the bandwidth of the path tail node PE4 are 10G;
step 1002: the path manager at network element PE1 begins initiating a flexible ethernet path setup.
The path manager on the head node PE1 initiates a path setup request message to the next hop node P2, the main fields of the request content are: the outbound group is group1, 10G bandwidth, and the outbound slots are 3 and 5.
After receiving the path establishment request, the second node P2 queries from the flexible ethernet manager to obtain the group1 of the node and the group1 communication of the node PE1, and checks that the available bandwidth of the flexible ethernet group1 of the local network element is greater than 10G, and the time slots 3 and 5 pre-allocated by the PE1 node are idle in the local network element, so that the bandwidth is pre-allocated to 2 time slots 3 and 5, that is, 10G. Next, a path establishment request is sent to the next hop node P3, and the request contents are: the outbound flexible ethernet group is group2, 10G bandwidth, and the inbound time slots are 1 and 2.
After the third node P3 receives the path request of the upstream node P2, it first queries the flexible ethernet manager to obtain the group3 of this node and the group2 of the node P2 for communication, and checks that the available bandwidth of the flexible ethernet group3 of this network element is greater than 10G, and the time slots 1 and 2 pre-allocated by the PE2 node are idle in this network element, and then pre-allocates the bandwidth to 2 time slots 1 and 2, that is, 10G. A path setup request is then sent to the next hop node PE4, the request being: the outbound flexible ethernet group is group5, 10G bandwidth, and the outbound slots are 2 and 4.
After receiving the path request of the upstream node P3, the fourth node PE4 first queries the flexible ethernet group manager to obtain the group1 of the local node and the group5 of the P3 node for communication, and checks that the available bandwidth of the flexible ethernet group1 of the local network element is greater than 10G. And then pre-allocated to 2 slots 2 and 4, i.e., 10G of bandwidth. At the same time PE4 checks that it is an end-of-path node and writes slots 2 and 4 to the hardware registers. Finally, in response to the P3 node, the inbound time slots are assigned 2 and 4.
When node P3 receives the path setup success acknowledgement from PE4 and allocates inbound slots 2 and 4, it allocates outbound slots 2 and 4 on local outbound flexible ethernet group5 and writes the hardware registers. Then, the intersection between the time slots 1 and 2 of the group3 to the time slots 2 and 4 of the group5 is established on the equipment, and the hardware register is issued. Finally, the P3 node acknowledges that the P2 node entry slot assignments are 1 and 2.
When node P2 receives the path setup success acknowledgement of P3 and allocates slots 1 and 2, slot 1 and 2 are allocated on the local egress flexible ethernet group2 and the hardware registers are written. Then, the intersection between the time slots 3 and 5 of the group1 to the time slots 1 and 2 of the group2 is established on the equipment, and the hardware register is issued. Finally, the answering PE1 node entry is allocated time slots 3 and 5.
When the node PE1 receives the path setup success acknowledgement of P2 and allocates ingress slots 3 and 5, it allocates egress slots 3 and 5 on the local egress flexible ethernet group1 and writes the hardware register.
To this end, the flexible ethernet bi-directional path with 10G bandwidth from PE1 to PE4 was successfully established.
The embodiment of the present invention further provides a flexible ethernet network element, which includes a memory and a processor, where the memory is used to store a data processing program, and the data processing program, when executed by the processor, implements the steps of the flexible ethernet path establishment method.
The embodiment of the present invention further provides a flexible ethernet control device, which includes a memory and a processor, where the memory is used to store a data processing program, and the data processing program, when executed by the processor, implements the steps of the flexible ethernet path establishment method.
An embodiment of the present invention further provides a computer-readable storage medium, in which computer-executable instructions are stored, where the computer-executable instructions are used to execute the method for establishing a flexible ethernet path.
In this embodiment, the storage medium may include, but is not limited to: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
It will be apparent to those skilled in the art that the modules or steps of the embodiments of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different from that described herein, or they may be separately fabricated into integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, embodiments of the invention are not limited to any specific combination of hardware and software.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (9)

1. A method of flexible ethernet path establishment, comprising:
calculating path information of the flexible Ethernet according to a TE-MIB (traffic engineering database) and path constraint information of the whole network flexible Ethernet group;
creating a flexible Ethernet path according to the calculated path information of the flexible Ethernet;
the method further comprises the following steps:
and updating the TE-MIB of the whole network flexible Ethernet group when the TE-MIB information of the local flexible Ethernet group of any network element changes.
2. The method of claim 1, wherein before calculating path information for the flexible ethernet based on the full-network flexible ethernet group TE-MIB and the path constraint information, the method further comprises:
and constructing the full-network flexible Ethernet group TE-MIB.
3. The method of claim 2, wherein the constructing the full-network flexible ethernet group TE-MIB comprises:
and summarizing the local flexible Ethernet group TE-MIB information of each network element to form the whole network flexible Ethernet group TE-MIB.
4. The method of claim 1 or 3,
the local flexible Ethernet group TE-MIB information comprises: node identification ID information, group information, time slot information, and group connection relationship information.
5. The method according to any one of claims 1 to 4,
the path constraint information includes: first node information, last node information and constraint condition information; the constraint condition information includes at least one of the following information: path bandwidth information, must pass node information, and avoid node information;
the path information includes: a network element node list and flexible Ethernet group information, wherein the flexible Ethernet group information at least comprises flexible Ethernet group identification information;
the flexible ethernet path is a unidirectional path or a bidirectional path.
6. The method of claim 1, wherein when the method is applied to a network element, the creating a flexible ethernet path according to the calculated path information of the flexible ethernet includes:
when the network element is the first node on the flexible Ethernet path, sending a path establishment request message to a downstream node according to the path information; receiving a response message sent by the downstream node, and configuring the reserved time slot to a hardware register;
when the network element is the last node on the flexible Ethernet path, receiving a path establishment request message sent by an upstream node, performing resource check, reserving time slot resources, configuring reserved time slots to a hardware register, and sending a response message to the upstream node;
when the network element is a node except the first node and the last node on the flexible Ethernet path, receiving a path establishment request message sent by an upstream node, performing resource check, reserving time slot resources, and sending the path establishment request message to a downstream node; and receiving a response message sent by the downstream node, configuring the reserved time slot and the time slot crossing information to a hardware register, and sending the response message to the upstream node.
7. The method according to claim 1, wherein when the method is applied to a control device, the creating a flexible ethernet path according to the calculated path information of the flexible ethernet includes:
the control equipment generates a time slot resource configuration command of each node on the flexible Ethernet path and a time slot cross configuration command except the head node and the tail node according to the calculated path information of the flexible Ethernet, and sends the time slot resource configuration command and the time slot cross configuration command to corresponding nodes;
the control equipment is a controller or a network manager.
8. A flexible Ethernet network element comprising a memory and a processor, the memory for storing a data processing program which when executed by the processor implements the steps of the method of flexible Ethernet path establishment of any of claims 1 to 6.
9. A flexible ethernet control apparatus comprising a memory and a processor, said memory for storing a data processing program, said data processing program when executed by said processor implementing the steps of the method of flexible ethernet path establishment according to any of claims 1 to 5 and 7.
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