WO2016197836A1

WO2016197836A1 - Method, apparatus and system for announcing uni tunnel state

Info

Publication number: WO2016197836A1
Application number: PCT/CN2016/084141
Authority: WO
Inventors: 孙东志; 曾昕宗; 李鉴
Original assignee: 华为技术有限公司
Priority date: 2015-06-09
Filing date: 2016-05-31
Publication date: 2016-12-15
Also published as: CN105162705B; CN105162705A

Abstract

Provided are a method, apparatus and system for announcing a UIN tunnel state. The method comprises: an IP controller sending, to an optical controller, a UNI tunnel state request message for requesting the optical controller to send information about a changed second state of the UNI tunnel; and when a state of the UNI tunnel changes from a first state to the second state, the optical controller sending, to the IP controller, the information about the changed second state of the UNI tunnel, wherein the IP controller may timely update the information about the changed second state of the UNI tunnel, and the IP controller may learn the updated state of the UNI tunnel, and then, when calculating a transmission path of a service data stream, the IP controller may learn accessibility of a VNT link bound to the UNI tunnel, delete inaccessible VNT links, and the transmission path of the service data stream, which is obtained by means of calculation, is available. The complexity for the IP controller to calculate a transmission path of a service data stream is reduced, and the time for calculating the transmission path of the service data stream is shortened.

Description

Method, device and system for informing UNI tunnel state

This application claims the priority of the Chinese Patent Application filed on June 9, 2015, the Chinese Patent Office, Application No. CN 201510313946.8, entitled "A Method, Apparatus and System for Informing the Status of a UNI Tunnel", the entire contents of which are hereby incorporated by reference. The citations are incorporated herein by reference.

Technical field

The present invention relates to the field of communications technologies, and in particular, to a method, device, and system for advertising a User Network Interface (UNI) tunnel state.

Background technique

At present, the transmission of transmission service data in the communication field is divided into two parts, one is the transmission of service data of the Internet Protocol (IP) layer, and the other part is the transmission of optical layer service data. The calculation and transmission control of the service data transmission path by the IP layer and the optical layer are independent of each other. An IP path calculation module (PCE) is configured on the IP SNC (Smart Network Controller) of the IP layer, and the IP PCE is used to manage a transmission path of IP layer service data. An optical PCE is configured on the TSDN (Transport-Software Defined Networking) of the optical layer to manage the transmission path of the optical layer service data.

At present, the communication field abstracts the port connection information between the optical layer transmission path, the border router in the IP layer transmission path, and the boundary node device in the optical layer path into a virtual network topology (VNT) link. . In the IP layer, the VNT link can be regarded as a virtual link between two routers that can be established but not yet established. That is, the VNT link can form a service data transmission path with the IP layer transmission path.

The VNT link is bound to the UNI tunnel in advance. The Path Computation Client (PCC) reports the binding information of the VNT link and the UNI tunnel to the IP PCE. When calculating the transmission path of the service data stream, the IP PCE considers that each VNT link is reachable. However, whether the VNT link is reachable depends not only on whether it is bound to the UNI tunnel but also on whether the bound UNI tunnel is available. In practical applications, in the optical layer network topology, A UNI tunnel shares a port resource. When one of the UNI tunnels establishes a connection, the other UNI tunnels that share the same port with the UNI tunnel cannot establish a connection. Also, when one optical node in the optical layer network topology fails, all UNI tunnels connected to the failed optical node are unavailable.

At present, the IP PCE calculates the transmission path of the first service data stream according to the obtained binding information of the VNT link and the UNI tunnel, and the IP PCE cannot know the first of the calculated first service data stream transmission paths. Whether the first UNI tunnel bound to the VNT link is available. The IP PCE sends a message to the optical PCE to query whether the first UNI tunnel is available, and the optical PCE returns to the IP PCE whether the first UNI tunnel is available. When the first UNI tunnel is unavailable, the IP PCE needs to recalculate the transmission path of the second service data stream, and sends the calculated second traffic data stream to the optical PCE to which the second VNT link is bound. Whether the second UNI tunnel is available. Until the PCT tunnel bound to the VNT link in the service data stream transmission path calculated by the IP PCE is available. IP PCE uses the above method to calculate the business data stream transmission path calculation process is complex and time consuming.

Summary of the invention

The embodiment of the invention provides a method, a device and a system for announcing the state of a UNI tunnel, which are used to solve the problem that the IP controller cannot know the UNI tunnel state and the calculated transmission path of the service data stream is unavailable.

To this end, the technical solution of the present invention to solve the technical problem is:

A first aspect of the embodiments of the present invention provides a method for requesting a UNI tunnel state of a user network side interface, where the method includes:

The Internet Protocol (IP) IP controller generates a UNI tunnel status request message, where the UNI tunnel status request message carries a UNI tunnel status request identifier, and the UNI tunnel status request identifier is used to indicate that when the status of the UNI tunnel is changed from the first status to the first In the second state, requesting to send information of the changed second state of the UNI tunnel;

The IP controller sends the UNI tunnel status request message to the light controller.

In a first possible implementation manner of the first aspect of the embodiments of the present invention,

The UNI tunnel status request message is an open message in the path calculation unit communication protocol PCEP, and the open message includes an option Optional field, where the Optional field carries the UNI tunnel status request identifier.

With reference to the first possible implementation manner of the first aspect of the embodiments of the present invention, in a second possible implementation manner,

The Optional field includes a type, a length, and a value, and the type carries a type value, where the type value is used to indicate that the type of the Optional field is a second state that indicates whether the UNI tunnel is requested to be changed. The information indicates the length of the Optional field, and the flag bit flag in the Value carries the UNI tunnel status request identifier, indicating that when the state of the UNI tunnel changes from the first state to the second state And requesting information of the changed second state of the UNI tunnel.

With reference to the first aspect of the embodiments of the present invention to the second possible implementation of the first aspect, in a third possible implementation, the method further includes:

Receiving, by the IP controller, a UNI tunnel status advertisement message sent by the optical controller, where the UNI tunnel status advertisement message carries a UNI tunnel status advertisement identifier, an identifier of the UNI tunnel, and a status of the UNI tunnel, The UNI tunnel status advertisement identifier is used to indicate that the type of the UNI tunnel status advertisement message is information for advertising the second state after the UNI tunnel is changed;

The IP controller parses the UNI tunnel status advertisement message to obtain information about the second state;

The IP controller updates the information of the first state corresponding to the identifier of the UNI tunnel by using the information of the second state;

Obtaining, by the IP controller, the reachability of the virtual network topology VNT link according to the information of the second state after the UNI tunnel is updated, where the VNT link is bound to the UNI tunnel;

The IP controller calculates a transmission path of the service data flow according to the reachability of the VNT link.

A second aspect of the embodiments of the present invention provides a method for advertising a state of a network side interface UNI tunnel of a user, where the method includes:

The UNI system receives the UNI tunnel status request message sent by the Internet Protocol Protocol (IP) controller, and the UNI tunnel status request message carries a UNI tunnel status request identifier, where the UNI tunnel status request identifier is used to indicate that the status of the UNI tunnel is When a state is changed to the second state, requesting to send information of the changed second state of the UNI tunnel;

When the state of the UNI tunnel is changed from the first state to the second state, the optical controller acquires information about the identifier of the UNI tunnel and the second state;

The UNI tunnel status advertisement message is generated by the optical controller, where the UNI tunnel status advertisement message includes: a UNI tunnel status advertisement identifier, an identifier of the UNI tunnel, and information about the second state, the UNI tunnel status advertisement And indicating that the type of the UNI tunnel status advertisement message is information for advertising the second state after the UNI tunnel is changed;

The light controller sends the UNI tunnel status announcement message to the IP controller.

In a first possible implementation manner of the second aspect of the embodiment of the present invention,

The UNI tunnel state advertisement message is a path calculation advertisement PCNtf message, where the PCNtf message includes an advertisement type NT field, an advertisement value NV field, and an option Optional field, and the NT field carries a first type value. The first type value indicates that the type of the PCNtf message is information for advertising the second state after the UNI tunnel is changed, and the NV field indicates information of the second state that is advertised by the PCNtf message. The Optional field carries the identifier of the UNI tunnel.

With reference to the first possible implementation manner of the second aspect of the embodiments of the present invention, in a second possible implementation manner,

The Optional field includes a type Type, a length length, and a value value, where the Type carries a second type value, and the second type value indicates that the type of the Optional field is an identifier that represents the UNI tunnel, and the Length indication The length of the Optional field, the value indicating the identifier of the UNI tunnel, the value including the source address of the UNI tunnel, the IPv4 Tunnel Sender Address, the label switching path LSP ID, the tunnel tunnel ID, the extended tunnel Extended Tunnel ID, and the destination. Address IPv4Tunnel Endpoint Address.

With reference to the second aspect of the embodiments of the present invention to the second possible implementation of the second aspect, in a third possible implementation, the information that the optical controller acquires the identifier and the second state of the UNI tunnel includes:

Receiving, by the optical controller, connection change information of the first optical network device and the second optical network device that are sent by the first optical network device;

And obtaining, by the optical controller, an identifier of the UNI tunnel established between the first optical network device and the second optical network device according to the connection change information, and the UNI tunnel The first state is changed to information of the second state after the second state.

The third aspect of the embodiment of the present invention provides an internetwork protocol IP controller that requests a UNI tunnel state of a user network side interface, where the IP controller includes:

a generating unit, configured to generate a UNI tunnel state request message, where the UNI tunnel state request message carries a UNI tunnel state request identifier, where the UNI tunnel state request identifier is used to indicate that when the state of the UNI tunnel is changed from the first state to the second state In the state, requesting to send information of the changed second state of the UNI tunnel;

And a sending unit, configured to send the UNI tunnel state request message generated by the generating unit to the light controller.

In a first possible implementation manner of the third aspect of the embodiment of the present invention,

With reference to the first possible implementation manner of the third aspect of the embodiments of the present invention, in a second possible implementation manner,

With reference to the third aspect of the embodiments of the present invention, the second possible implementation manner of the third aspect, in the third possible implementation, the IP controller further includes:

a receiving unit, configured to receive a UNI tunnel status advertisement message sent by the optical controller, where the UNI tunnel status advertisement message carries a UNI tunnel status advertisement identifier, an identifier of the UNI tunnel, and a status of the UNI tunnel, The UNI tunnel status advertisement identifier is used to indicate that the type of the UNI tunnel status advertisement message is information for advertising the second state after the UNI tunnel is changed;

a parsing unit, configured to parse the UNI tunnel status advertisement message received by the receiving unit Obtaining information of the second state;

An update unit, configured to update first state information corresponding to the identifier of the UNI tunnel by using the information of the second state;

An obtaining unit, configured to acquire, according to the information of the second state after the UNI tunnel is updated, the reachability of the virtual network topology VNT link, where the VNT link is bound to the UNI tunnel;

a path calculation unit, configured to calculate a transmission path of the service data flow according to the reachability of the VNT link.

A fourth aspect of the embodiments of the present invention provides a light controller that advertises a UNI tunnel state of a user network side interface, where the light controller includes:

a receiving unit, configured to receive a UNI tunnel status request message sent by the Internetwork Protocol (IP) controller, where the UNI tunnel status request message carries a UNI tunnel status request identifier, where the UNI tunnel status request identifier is used to indicate the status of the UNI tunnel When the first state is changed to the second state, requesting to send information of the changed second state of the UNI tunnel;

An acquiring unit, configured to acquire information about the identifier of the UNI tunnel and the second state when the state of the UNI tunnel is changed from the first state to the second state;

a generating unit, configured to generate the UNI tunnel status advertisement message, where the UNI tunnel status advertisement message includes: a UNI tunnel status advertisement identifier, an identifier of the UNI tunnel, and information about the second state, the UNI tunnel status advertisement And indicating that the type of the UNI tunnel status advertisement message is information for advertising the second state after the UNI tunnel is changed;

And a sending unit, configured to send the UNI tunnel status advertisement message to the IP controller.

In a first possible implementation manner of the fourth aspect of the embodiments of the present invention,

The UNI tunnel state advertisement information is a path calculation advertisement PCNtf message, where the PCNtf message includes an advertisement type NT field, an advertisement value NV field, and an option Optional field, where the NT field carries a first type value. The first type value indicates that the type of the PCNtf message is information for advertising the second state after the UNI tunnel is changed, and the NV field indicates information of the second state that is advertised by the PCNtf message. The Optional field carries the identifier of the UNI tunnel.

With reference to the first possible implementation manner of the fourth aspect of the embodiments of the present invention, in a second possible implementation manner of the fourth aspect,

With reference to the fourth possible aspect of the fourth to fourth aspects of the present invention, in the third possible implementation, the acquiring unit includes:

a receiving subunit, configured to receive connection change information of the first optical network device and the second optical network device sent by the first optical network device;

An information acquiring subunit, configured to obtain, according to the connection change information, an identifier of the UNI tunnel established between the first optical network device and a second optical network device, and the UNI tunnel changes from the first state The information of the second state after the second state.

A fifth aspect of the embodiments of the present invention provides a system for obtaining a UNI tunnel state of a user network side interface, where the system includes:

The Internetworking Protocol IP Controller for requesting a UNI tunnel state according to the third aspect to the third aspect of the present invention, and the third aspect to the fourth aspect of the fourth to fourth embodiments of the present invention The optical controller that announces the UNI tunnel state as described in the embodiments.

According to the above technical solution, the present invention has the following beneficial effects:

The embodiment of the present invention provides a method, a device, and a system for advertising a UNI tunnel state. The IP controller sends a UNI tunnel status request message to the optical controller, where the UNI tunnel status request message carries a UNI tunnel status request identifier, and the UNI tunnel The status request identifier is used to indicate that when the state of the UNI tunnel is changed from the first state to the second state, the IP controller requests the optical controller to send information of the changed second state of the UNI tunnel. When the state of the UNI tunnel is changed from the first state to the second state, the optical controller sends information about the changed second state of the UNI tunnel to the IP controller, and the IP controller may update the UNI in time. Information about the second state after the tunnel is changed. The IP controller can learn the updated state of the UNI tunnel, and the IP controller can learn the reachability of the VNT link bound to the UNI tunnel, and delete the unreachable state when calculating the transmission path of the service data flow. VNT link, calculated business The transmission path of the data stream is available. Reduce the complexity of the IP controller to calculate the service data stream transmission path and shorten the time for calculating the service data stream transmission path.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a schematic diagram of a connection between a border router in an IP layer path and a boundary optical network device in an optical layer path;

2 is a flowchart of a method for requesting a UNI tunnel state according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a format of an Open message according to an embodiment of the present disclosure;

4 is a schematic diagram of a format of an Optional field in an Open message according to an embodiment of the present invention;

FIG. 5 is a flowchart of a method for advertising a UNI tunnel state according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a format of a PCNtf message according to an embodiment of the present disclosure;

FIG. 7 is a schematic diagram of a format of an Optional field in a PCNtf message according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of an IP controller requesting a UNI tunnel state according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of an optical controller for announcing a UNI tunnel state according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a system for obtaining a UNI tunnel state according to an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of an IP controller hardware for requesting a state of a UNI tunnel according to an embodiment of the present disclosure;

FIG. 12 is a schematic structural diagram of a hardware of an optical controller for announcing a UNI tunnel state according to an embodiment of the present disclosure;

FIG. 13 is a schematic structural diagram of a hardware structure of a system for obtaining a UNI tunnel state according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly described in conjunction with the drawings in the embodiments of the present invention. Some embodiments, rather than all of the embodiments, are invented. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

In order to provide an implementation scheme for the IP controller to learn the information of the second state after the change of the UNI tunnel, the embodiment of the present invention provides an advertisement. Method, Apparatus, and System for UNI Tunnel Status The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of a connection between a border router in an IP layer path and a boundary optical network device in an optical layer path. The IP PCE in the IP SNC maintains the router in the IP layer path and the link between the border router and the border optical network device in the optical layer path. The optical PCE in the TSDN maintains the optical network equipment in the optical layer path and the link between the border optical network equipment and the border router in the IP layer path. After the VNT link is bound to the UNI tunnel, the IP PCE can obtain the binding information between the VNT link and the UNI tunnel. However, the IP PCE cannot know whether the UNI tunnel located in the optical transmission path is reachable. When the UNI tunnel is unreachable, the VNT link bound to the UNI tunnel is also unreachable, and the IP PCE calculates the service. When the transmission path of the data stream passes through the VNT link, the transmission of the service data stream is interrupted.

In order to ensure that the IP PCE can know the state of the UNI tunnel in the optical transmission path in time, so that the transmission path of the service data stream calculated by the IP PCE can effectively transmit the service data stream, the embodiment of the present invention provides a method for advertising the state of the UNI tunnel. The details are explained below.

2 is a flowchart of a method for requesting a UNI tunnel state according to an embodiment of the present invention, where the method includes:

201: The IP controller generates a UNI tunnel state request message, where the UNI tunnel state request message carries a UNI tunnel state request identifier, where the UNI tunnel state request identifier is used to indicate that when the state of the UNI tunnel is changed from the first state to the second state In the state, the information of the changed second state of the UNI tunnel is requested to be sent.

202: The IP controller sends the UNI tunnel status request message to a light controller.

The IP controller generates a UNI Tunnel Status Request message, which is used to "subscribe" to the optical controller the status of the UNI tunnel. "Subscription" means that when the state of the UNI tunnel changes (for example, the state of the UNI tunnel changes from reachable to unreachable, or the state of the UNI tunnel changes from unreachable to reachable), that is, the UNI tunnel When the state changes from the first state to the second state, the IP controller requests the optical controller to send information of the second state after the UNI tunnel change to the IP controller. That is, the IP controller generates a UNI tunnel status request message, and is configured to request the optical controller to notify the IP controller of the information of the second state after the UNI tunnel is changed, to implement the IP controller. The latest status information of the UNI tunnel is obtained in real time.

The state of the UNI tunnel includes that the UNI tunnel is reachable and the UNI tunnel is unreachable. The UNI tunnel is reachable, indicating that the UNI tunnel is connected, and the service data can be transmitted; the UNI tunnel is unreachable, indicating that the UNI tunnel cannot be connected, and the service data cannot be transmitted. In a typical application scenario, multiple UNI tunnels share ports on the same optical network device. After one UNI tunnel establishes a connection with the UNI tunnel, other UNI tunnels cannot establish connections on the port. The tunnel is unreachable. Also, when an optical network device fails, all UNI tunnels that establish connections using the ports on the optical network device are unreachable.

In the embodiment of the present invention, the first state is that the UNI tunnel is reachable, and the second state is that the UNI state is unreachable as an example. The implementation manner of the first state is that the UNI tunnel is unreachable, and the second state is that the UNI state is reachable, and is not described here.

The IP controller sends the generated UNI tunnel status request message to the light controller. After receiving the UNI tunnel status request message, the optical controller resolves to the UNI tunnel status request identifier in the UNI tunnel status request message, and learns that the IP controller "subscribes" the UNI tunnel to the optical controller. The state, when the state of the UNI tunnel is changed from the first state to the second state, transmitting information of the changed second state of the UNI tunnel to the IP controller.

In a specific implementation, the UNI tunnel state request message generated by the network protocol IP controller is an open message in a Path Computation Element Communication Protocol (PCEP), where the open message includes an Optional Option field. The Optional field carries the UNI tunnel status request identifier.

The UNI tunnel status request message is an Open defined by the standard RFC 5540 in the PCEP protocol. The format of the Open message is as shown in FIG. 3. Wherein, Ver indicates the version number of the PCEP used by the Open message. Flags indicate the flag bits of the Open message. Keep alive instructs the IP controller to send the maximum time interval between two adjacent Open messages. After the Dead timer indicates that the time specified by the Dead timer is reached, no Open message is received, indicating that the PCEP session for sending the Open message ends, and the optical controller will perform a PCEP session between the optical controller and the IP controller. The status is set to down. The SID indicates the PCEP session ID to which the Open message belongs.

The Optional field carries the UNI tunnel status request identifier. The Optional field includes a type, a length, and a value, and the type carries a type value, where the type value is used to indicate that the type of the Optional field is a second state that indicates whether the UNI tunnel is requested to be changed. The information indicates the length of the Optional field, and the flag bit Flags in the Value carries the UNI tunnel status request identifier, indicating that when the state of the UNI tunnel changes from the first state to the second state And requesting information of the changed second state of the UNI tunnel. For specific settings, the value of Type is 30 and the value of Length is 4.

The format of the Optional field is as shown in FIG. 4, the Type occupies 2 bytes; the Length occupies 2 bytes; the Reserved occupies 2 bytes, which is a reserved field; the Flags occupies 2 bytes, and the N bits in the Flags, Indicates whether to "subscribe" the information of the changed second state of the UNI tunnel. The Reserved and Flags together form the Value of the Optional field. In the actual application scenario, when the N bit in the Flags is set to 1, it indicates that the UNI tunnel is "subscribed". If the N bit in the Flags is set to 0, the UNI tunnel is not subscribed. Sex. The type value of Type and the value of N bits in Flags together indicate whether to "subscribe" the information of the changed second state of the UNI tunnel, that is, the reachability of the UNI tunnel.

In the embodiment provided by the present invention, a status request message is defined, and the IP controller generates the UNI tunnel status request message and sends it to the optical controller to request "subscription" of the reachability of the UNI tunnel. In a specific implementation process, the method further includes:

The IP controller "subscribes" to the optical controller the state of the UNI tunnel, and when the state of the UNI tunnel changes from the first state to the second state, the IP controller receives the light control The UNI tunnel status advertisement message sent by the device is used to advertise the information of the second state after the UNI tunnel is changed. The UNI tunnel status advertisement message carries a UNI tunnel status advertisement identifier, which is used to indicate that the type of the status advertisement information is information for advertising the second state after the UNI tunnel is changed; the UNI tunnel status advertisement message is also carried. The identifier of the UNI tunnel is used to identify the UNI tunnel. The UNI tunnel state advertisement message also carries the information of the second state, which is used to indicate the changed state of the UNI tunnel.

After receiving the UNI tunnel state advertisement message, the IP controller parses the information of the second state after the UNI tunnel is changed from the UNI tunnel state advertisement message, and updates the information by using the second state information. The information about the original first state of the UNI tunnel. The IP controller obtains the reachability of the VNT link according to the information of the second state after the change of the UNI tunnel, and calculates the transmission path of the service data flow according to the reachability of the VNT link.

Therefore, when the state of the UNI tunnel changes from the first state to the second state, the optical controller immediately generates the UNI tunnel state advertisement message and sends the message to the IP controller. The IP controller can know the information of the second state after the change of the UNI tunnel in time. The IP controller can learn the reachability of the VNT link bound to the UNI tunnel according to the information of the second state after the UNI tunnel is changed, and then calculate the service data flow according to the reachability of the VNT link. The transmission path. When the information of the second state of the UNI tunnel is reachable, the VNT link bound to the UNI tunnel is also reachable, and the IP controller can calculate the transmission path of the service data flow through the VNT link; When the information of the second state of the UNI tunnel is unreachable, the VNT link bound to the UNI tunnel is also unreachable, and the IP controller cannot calculate the transmission path of the service data flow. The VNT link, the calculated transmission path of the service data flow avoids the VNT link, and obtains an effective service transmission path. In this way, when the IP controller calculates the transmission path of the service data flow, there is no problem that the UNI tunnel bound to the VNT link is unreachable and needs to be repeatedly calculated to obtain a valid transmission path of the service data stream. The complexity of calculating the transmission path of the service data stream by the IP controller is reduced, and the time for calculating the transmission path of the service data stream can be shortened.

For example, in the actual application scenario, it is assumed that when the state of the UNI tunnel changes from reachable to unreachable, the optical controller generates the UNI tunnel state advertisement message, where the UNI tunnel state advertisement information is used to notify the The status of the UNI tunnel is unreachable. When the IP controller receives the UNI tunnel status advertisement information, the UNI tunnel is unreachable, that is, the VNT link bound to the UNI tunnel is unreachable. Then, the IP data controller calculates that the obtained service data stream transmission path does not pass through the VNT link.

FIG. 5 is a flowchart of a method for advertising a UNI tunnel state according to an embodiment of the present disclosure, where the method includes:

501: The optical controller receives a UNI tunnel status request message sent by the IP controller, where the UNI tunnel status request message carries a UNI tunnel status request identifier, where the UNI tunnel status request identifier is used to indicate that when the status of the UNI tunnel is When the first state is changed to the second state, information for transmitting the changed second state of the UNI tunnel is requested.

The optical controller receives the UNI tunnel status request message sent by the IP controller, parses the UNI tunnel status request message, and learns that the IP controller "subscribes" the changed state of the UNI tunnel to the optical controller. The format of the UNI tunnel state request message generated by the IP controller is similar to the description in the method for requesting the state of the UNI tunnel shown in FIG. 2, and is not described here with reference to the method in the method shown in FIG. Narration.

502: When the state of the UNI tunnel is changed from the first state to the second state, the optical controller acquires information about the identifier of the UNI tunnel and the second state.

When the state of the UNI tunnel is changed from the first state to the second state, the optical controller acquires the changed state of the UNI tunnel because the IP controller "subscribes" the state of the UNI tunnel. Information of the two states and the identity of the UNI tunnel. The UNI tunnel is changed from the first state to the second state, and may be changed from the reachable state to the unreachable state. It changes from unreachable state to reachable state. The following is an example in which the UNI tunnel is changed from the reachable state to the unreachable state. The UNI tunnel is changed from the unreachable state to the reachable state, and is not described here.

In a specific embodiment, the information that the optical controller acquires the identifier and the second state of the UNI tunnel includes:

The optical controller obtains an identifier of the UNI tunnel established between the first optical network device and the second optical network device according to the connection change information, and the UNI tunnel changes from the first state to the Information about the second state after the second state.

When the port on the second optical network device is faulty, the UNI tunnel connection that is connected by using the port on the first optical network device and the second optical network device is faulty; or, when the second optical network device is faulty, All UNI tunnels between an optical network device and the second optical network device are connected to failure. Then, the state of the connected UNI tunnel changes from the reachable state to the unreachable state. At this time, the first network device sends connection change information to the light controller. The optical controller receives the connection change information, and obtains an identifier of the UNI tunnel according to the connection change information, and information about the second state after the UNI tunnel is changed from the first state to the second state.

In an actual application, an Interior Gateway Protocol (IGP) or a PCEP protocol is established between the first optical network device and the optical controller. The first optical network device sends the connection change information to the optical controller by using the IGP protocol or the PCEP protocol.

503: The optical controller generates the UNI tunnel state advertisement message, where the UNI tunnel state advertisement message includes: a UNI tunnel state advertisement identifier, an identifier of the UNI tunnel, and information about the second state, where the UNI tunnel The status advertisement identifier is used to indicate that the type of the UNI tunnel status advertisement message is information for advertising the second state after the UNI tunnel is changed.

504: The optical controller sends the UNI tunnel status advertisement message to the IP controller.

After the information about the second state of the UNI tunnel is changed, and the identifier of the UNI tunnel is generated, the UNI tunnel status notification information is generated, and the UNI is subscribed to the UNI. The IP controller in the tunnel state sends the UNI tunnel status advertisement information, and advertises information about the second state after the UNI tunnel is changed.

In a specific embodiment, the status advertisement information is a Path Computation Notification (PCNtf) message, where the PCNtf message includes an advertisement type NT field, an advertisement value NV field, and an option Optional field, where the PCNtf message includes a description. The NT field carries the first type of value. The first type value indicates that the type of the PCNtf message is information for advertising the second state after the UNI tunnel is changed, and the NV field indicates information of the second state that is advertised by the PCNtf message. The Optional field carries the identifier of the UNI tunnel.

The UNI tunnel status advertisement message generated by the optical controller by using the identifier of the UNI tunnel and the information of the second state is a PCNtf message defined in the RFC standard, where the PCNtf message includes an advertisement type NT field and an advertisement value NV field. And an Optional field, the NT field indicating a type of the PCNtf message, the NV field indicating information of the second state advertised by the PCNtf message, and the Optional field carrying an identifier of the UNI tunnel.

The format of the PCNtf message is as shown in FIG. 6, and Reserved is a reserved field in the PCNtf message. Flag indicates the flag bit of the PCNtf message. The NT field occupies 2 bytes, indicating that the type of the PCNtf message is information for advertising the second state after the UNI tunnel is changed. The NV field occupies 2 bytes, indicating information of the second state advertised by the PCNtf message. One of the PCNtf messages advertises information of a second state after a UNI tunnel is changed. In the specific application scenario, the value of the NT field is set to 101. If the value of the NV field is 1, the UNI tunnel is reachable. If the value of the NV field is 2, the UNI tunnel is unreachable.

The Optional field carries the identifier of the UNI tunnel. The format of the Optional field is as shown in FIG. 7. The Optional field includes a type Type, a length length, and a value value, where the Type carries a second type value, and the second type value indicates that the type of the Optional field is an identifier that represents the UNI tunnel, and the Length indication The length of the Optional field, the value indicating the identifier of the UNI tunnel, the value including the source address of the UNI tunnel, the IPv4 Tunnel Sender Address, the label switching path LSP ID, the tunnel tunnel ID, the extended tunnel Extended Tunnel ID, and the destination. Address IPv4Tunnel Endpoint Address.

In a specific application scenario, the value of Type is set to 18, and the value of Length is set to 16. In the Optional field, the IPv4 Tunnel Sender Address, LSP ID, Tunnel ID, and Extended The tunnel ID and the IPv4 Tunnel Endpoint Address together form the identifier of the UNI tunnel.

And sending, by the optical controller, the generated UNI tunnel state advertisement message to the IP controller, where the IP controller learns information about the second state after the UNI tunnel is changed according to the UNI tunnel state advertisement message. The IP controller learns the reachability of the VNT link bound to the UNI tunnel according to the information of the second state after the UNI tunnel is changed, and calculates the reachability according to the reachability of the VNT link. The transmission path of traffic data. This is similar to the description in the method shown in FIG. 2, and the description in the method shown in FIG. 2 will not be repeated here.

As can be seen from the above, the present invention has the following beneficial effects:

The IP controller sends a UNI tunnel status request message to the optical controller, where the UNI tunnel status request message carries a UNI tunnel status request identifier, where the UNI tunnel status request identifier is used to indicate that when the status of the UNI tunnel is changed from the first status to the In the second state, the IP controller requests the optical controller to send information of the changed second state of the UNI tunnel. When the state of the UNI tunnel is changed from the first state to the second state, the optical controller sends information about the changed second state of the UNI tunnel to the IP controller, and the IP controller may update the UNI in time. Information about the second state after the tunnel is changed. The IP controller can learn the updated state of the UNI tunnel, and the IP controller can learn the reachability of the VNT link bound to the UNI tunnel, and delete the unreachable state when calculating the transmission path of the service data flow. The VNT link, the calculated transmission path of the service data stream is available. Reduce the complexity of the IP controller to calculate the service data stream transmission path and shorten the time for calculating the service data stream transmission path.

FIG. 8 is a schematic structural diagram of an IP controller 800 for requesting a UNI tunnel state according to an embodiment of the present invention. The IP controller 800 may be an IP controller in the embodiment shown in FIG. 2 or FIG. 5, where the IP control is performed. The device 800 includes:

The generating unit 801 is configured to generate a UNI tunnel status request message, where the UNI tunnel status request message carries a UNI tunnel status request identifier, where the UNI tunnel status request identifier is used to indicate that when the status of the UNI tunnel is changed by the first status In the second state, the information of the changed second state of the UNI tunnel is requested to be sent.

a sending unit 802, configured to use the UNI tunnel status generated by the generating unit 801 The message is sent to the light controller.

Optionally, the UNI tunnel status request message is an open message in the path calculation unit communication protocol PCEP, and the open message includes an option Optional field, where the Optional field carries the UNI tunnel status request identifier.

The Optional field includes a type, a length, and a value, and the type carries a type value, where the type value is used to indicate that the type of the Optional field is a flag indicating whether the UNI tunnel is requested to be changed. The information of the two states, the Length indicates the length of the Optional field, and the flag bit flag in the Value carries the UNI tunnel state request identifier, indicating that when the state of the UNI tunnel is changed from the first state to the second state In the state, the information of the changed second state of the UNI tunnel is requested.

Optionally, the IP controller further includes:

a parsing unit, configured to parse the UNI tunnel status advertisement message received by the receiving unit to obtain information about the second state;

The IP controller requesting the UNI tunnel state shown in FIG. 8 is an IP controller corresponding to the method for requesting the UNI tunnel state shown in FIG. 2, and referring to the technical description in the method for requesting the UNI tunnel state shown in FIG. I won't go into details here.

FIG. 9 is a schematic structural diagram of a light controller 900 for announcing a state of a UNI tunnel according to an embodiment of the present invention. The light controller 900 may be a light controller in the embodiment shown in FIG. 2 or FIG. The light controller 900 includes:

The receiving unit 901 is configured to receive a UNI tunnel status request message sent by the Internetwork Protocol (IP) controller, where the UNI tunnel status request message carries a UNI tunnel status request identifier, where the UNI tunnel status request identifier is used to indicate that the UNI tunnel is When the state changes from the first state to the second state, the information of the changed second state of the UNI tunnel is requested to be sent.

The obtaining unit 902 is configured to acquire information about the identifier of the UNI tunnel and the second state when the state of the UNI tunnel is changed from the first state to the second state.

The generating unit 903 is configured to generate the UNI tunnel state advertisement message, where the UNI tunnel state advertisement message includes: a UNI tunnel state advertisement identifier, an identifier of the UNI tunnel, and information about the second state, where the state advertisement identifier The type used to indicate the UNI tunnel state advertisement message is information for advertising the second state after the UNI tunnel is changed.

The sending unit 904 is configured to send the UNI tunnel status advertisement message to the IP controller.

Optionally, the UNI tunnel state advertisement information is a path calculation advertisement PCNtf message, where the PCNtf message includes an advertisement type NT field, an advertisement value NV field, and an option Optional field, where the NT field carries a first type value. The first type value indicates that the type of the PCNtf message is information for advertising the second state after the UNI tunnel is changed, and the NV field indicates information of the second state that is advertised by the PCNtf message. The Optional field carries the identifier of the UNI tunnel.

The Optional field includes a type Type, a length length, and a value value, where the Type carries a second type value, and the second type value indicates that the type of the Optional field is an identifier that identifies the UNI tunnel. The length indicates the length of the Optional field, and the value indicates the identifier of the UNI tunnel. The value includes the source address of the UNI tunnel, the IPv4 Tunnel Sender Address, the label switched path LSP ID, the tunnel tunnel ID, and the extended tunnel Extended Tunnel ID. And the destination address IPv4Tunnel Endpoint Address.

Optionally, the obtaining unit 902 includes:

The optical controller for informing the UNI tunnel state shown in FIG. 9 is an IP controller corresponding to the method for advertising the UNI tunnel state shown in FIG. 5, and referring to the technical description in the method for requesting the UNI tunnel state shown in FIG. I won't go into details here.

FIG. 10 is a schematic structural diagram of a system 1000 for obtaining a state of a UNI tunnel according to an embodiment of the present disclosure, where the system 1000 includes:

The IP controller 1001 that requests the state of the UNI tunnel shown in FIG. 8, and the optical controller 1002 that announces the state of the UNI tunnel shown in FIG.

The IP controller 1001 is the IP controller shown in FIG. 8. The description of the IP controller is described with reference to FIG. 8. The optical controller 1002 is the optical controller shown in FIG. FIG. 9 is a description of the light controller, and details are not described herein again.

FIG. 11 is a schematic structural diagram of hardware of an IP controller 1100 for requesting a state of a UNI tunnel according to an embodiment of the present invention. The IP controller 1100 can be an IP controller in the embodiment shown in FIG. 2 or FIG. 5, and the IP controller 1100 includes:

A memory 1101, a transmitter 1102, and a processor 1103 connected to the memory 1101 and the transmitter 1102, respectively.

The memory 1101 is configured to store program instructions, and the processor 1103 is configured to retrieve the program instructions from the memory 1101 to perform the following operations:

Generating a UNI tunnel status request message, where the UNI tunnel status request message carries a UNI tunnel status request identifier, where the UNI tunnel status request identifier is used to indicate that when the status of the UNI tunnel changes from the first status to the second status, the request is sent. Information of the changed second state of the UNI tunnel;

The transmitter 1102 is configured to send the UNI tunnel status request message generated by the processor 1103 to a light controller.

Optionally, the UNI tunnel state request message is an open message in the path calculation unit communication protocol PCEP, where the open message includes an option Optional field, and the Optional word The segment carries the UNI tunnel status request identifier.

Optionally, the IP controller further includes:

a receiver, configured to receive a UNI tunnel status advertisement message sent by the optical controller, where the UNI tunnel status advertisement message carries a UNI tunnel status advertisement identifier, an identifier of the UNI tunnel, and a status of the UNI tunnel, The UNI tunnel status advertisement identifier is used to indicate that the type of the UNI tunnel status advertisement message is information for advertising the second state after the UNI tunnel is changed;

The processor 1103 is further configured to:

And parsing the UNI tunnel state advertisement message received by the receiver to obtain information about the second state;

Updating, by using the information of the second state, first state information corresponding to the identifier of the UNI tunnel;

Acquiring the reachability of the virtual network topology VNT link according to the updated information of the second state of the UNI tunnel, where the VNT link is bound to the UNI tunnel;

Calculating a transmission path of the service data flow according to the reachability of the VNT link.

The IP controller requesting the state of the UNI tunnel shown in FIG. 11 is an IP controller corresponding to the method of requesting the state of the UNI tunnel shown in FIG. 2, and referring to the method of requesting the state of the UNI tunnel shown in FIG. Technical description, no more details here.

FIG. 12 is a schematic diagram showing the hardware structure of a light controller 1200 for announcing a state of a UNI tunnel according to an embodiment of the present invention. The light controller 1200 may be a light controller in the embodiment shown in FIG. 2 or FIG. The 1200 includes:

A memory 1201, a receiver 1202, a transmitter 1203, and a processor 1204 connected to the memory 1201, the receiver 1202, and the transmitter 1203, respectively.

The receiver 1202 is configured to receive a UNI tunnel status request message sent by the Internetwork Protocol (IP) controller, where the UNI tunnel status request message carries a UNI tunnel status request identifier, where the UNI tunnel status request identifier is used to indicate that the UNI is When the state of the tunnel is changed from the first state to the second state, requesting to send information of the changed second state of the UNI tunnel;

The memory 1201 is configured to store program instructions, and the processor 1204 is configured to retrieve the program instructions from the memory 1201 to perform the following operations:

Obtaining information about the identifier of the UNI tunnel and the second state when the state of the UNI tunnel is changed from the first state to the second state;

Generating the UNI tunnel status advertisement message, where the UNI tunnel status advertisement message includes: a UNI tunnel status advertisement identifier, an identifier of the UNI tunnel, and information about the second state, where the UNI tunnel status advertisement identifier is used to indicate The type of the UNI tunnel state advertisement message is information for advertising the second state after the UNI tunnel is changed;

The transmitter 1203 is configured to send the UNI tunnel status advertisement message generated by the processor 1204 to the IP controller.

Optional,

The receiver 1202 is further configured to receive the first optical network sent by the first optical network device Connection change information between the device and the second optical network device;

The processor 1204 is further configured to:

Obtaining, according to the connection change information, an identifier of the UNI tunnel established between the first optical network device and the second optical network device, and after the UNI tunnel is changed from the first state to the second state The information of the second state.

The optical controller that announces the state of the UNI tunnel shown in FIG. 12 is an IP controller corresponding to the method of advertising the state of the UNI tunnel shown in FIG. 5, and refers to the method of requesting the state of the UNI tunnel shown in FIG. 5. Technical description, no more details here.

FIG. 13 is a schematic structural diagram of a system hardware for obtaining a state of a UNI tunnel according to an embodiment of the present disclosure, where the system includes:

The IP controller 1301 requesting the state of the UNI tunnel shown in FIG. 11 and the optical controller 1302 indicating the state of the UNI tunnel shown in FIG.

The IP controller 1301 is the IP controller shown in FIG. 8. The description of the IP controller is described with reference to FIG. 8 , and details are not described herein. The optical controller 1302 is the optical controller shown in FIG. FIG. 9 is a description of the light controller, and details are not described herein again.

The "first" in the first state mentioned in the embodiment of the present invention is only used for the name identification, and does not represent the first in the order. The same rules apply to "second" and the like.

It can be understood by those skilled in the art that all or part of the steps of implementing the foregoing method embodiments may be performed by hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, and when executed, the program includes The foregoing steps of the method embodiment; and the foregoing storage medium may be at least one of the following: a read-only memory (ROM), a RAM, a magnetic disk, or an optical disk, and the like, which can store the program code. .

Finally, it should be noted that the above embodiments are only used to exemplify the technical solutions of the present invention, and are not limited thereto; although the beneficial effects brought by the present invention and the present invention are described in detail with reference to the foregoing embodiments, the field It should be understood by those skilled in the art that the technical solutions described in the foregoing embodiments may be modified or equivalently replaced with some of the technical features; and such modifications or substitutions do not deviate from the essence of the corresponding technical solutions. The scope of the claims.

Claims

A method for requesting a UNI tunnel state of a user network side interface, the method comprising:

The Internet Protocol (IP) IP controller generates a UNI tunnel status request message, where the UNI tunnel status request message carries a UNI tunnel status request identifier, and the UNI tunnel status request identifier is used to indicate that when the status of the UNI tunnel is changed from the first status to the first In the second state, requesting to send information of the changed second state of the UNI tunnel;

The IP controller sends the UNI tunnel status request message to the light controller.
The method of claim 1 wherein

The UNI tunnel status request message is an open message in the path calculation unit communication protocol PCEP, and the open message includes an option Optional field, where the Optional field carries the UNI tunnel status request identifier.
The method of claim 2 wherein:

The Optional field includes a type, a length, and a value, and the type carries a type value, where the type value is used to indicate that the type of the Optional field is a second state that indicates whether the UNI tunnel is requested to be changed. The information indicates the length of the Optional field, and the flag bit flag in the Value carries the UNI tunnel status request identifier, indicating that when the state of the UNI tunnel changes from the first state to the second state And requesting information of the changed second state of the UNI tunnel.
The method of any of claims 1-3, wherein the method further comprises:

Receiving, by the IP controller, a UNI tunnel status advertisement message sent by the optical controller, where the UNI tunnel status advertisement message carries a UNI tunnel status advertisement identifier, an identifier of the UNI tunnel, and a status of the UNI tunnel, The UNI tunnel status advertisement identifier is used to indicate that the type of the UNI tunnel status advertisement message is information for advertising the second state after the UNI tunnel is changed;

The IP controller parses the UNI tunnel status advertisement message to obtain information about the second state;

The IP controller updates the identifier of the UNI tunnel by using the information of the second state Corresponding information of the first state;

Obtaining, by the IP controller, the reachability of the virtual network topology VNT link according to the information of the second state after the UNI tunnel is updated, where the VNT link is bound to the UNI tunnel;

The IP controller calculates a transmission path of the service data flow according to the reachability of the VNT link.
A method for advertising a state of a network side interface UNI tunnel of a user, wherein the method includes:

The UNI system receives the UNI tunnel status request message sent by the Internet Protocol Protocol (IP) controller, and the UNI tunnel status request message carries a UNI tunnel status request identifier, where the UNI tunnel status request identifier is used to indicate that the status of the UNI tunnel is When a state is changed to the second state, requesting to send information of the changed second state of the UNI tunnel;

When the state of the UNI tunnel is changed from the first state to the second state, the optical controller acquires information about the identifier of the UNI tunnel and the second state;

The UNI tunnel status advertisement message is generated by the optical controller, where the UNI tunnel status advertisement message includes: a UNI tunnel status advertisement identifier, an identifier of the UNI tunnel, and information about the second state, the UNI tunnel status advertisement And indicating that the type of the UNI tunnel status advertisement message is information for advertising the second state after the UNI tunnel is changed;

The light controller sends the UNI tunnel status announcement message to the IP controller.
The method of claim 5 wherein:

The UNI tunnel state advertisement message is a path calculation advertisement PCNtf message, where the PCNtf message includes an advertisement type NT field, an advertisement value NV field, and an option Optional field, and the NT field carries a first type value. The first type value indicates that the type of the PCNtf message is information for advertising the second state after the UNI tunnel is changed, and the NV field indicates information of the second state that is advertised by the PCNtf message. The Optional field carries the identifier of the UNI tunnel.
The method of claim 6 wherein:

The Optional field includes a type Type, a length length, and a value value, where the Type carries a second type value, and the second type value indicates that the type of the Optional field is an identifier that represents the UNI tunnel, and the Length indication Length of the Optional field, The value indicates the identifier of the UNI tunnel, and the value includes the source address IPv4 Tunnel Sender Address, the label switched path LSP ID, the tunnel tunnel ID, the extended tunnel Extended Tunnel ID, and the destination address IPv4 Tunnel Endpoint Address.
The method according to any one of claims 5-7, wherein the information that the optical controller acquires the identifier and the second state of the UNI tunnel includes:

Receiving, by the optical controller, connection change information of the first optical network device and the second optical network device that are sent by the first optical network device;

The optical controller obtains an identifier of the UNI tunnel established between the first optical network device and the second optical network device according to the connection change information, and the UNI tunnel changes from the first state to the Information about the second state after the second state.
An internetwork protocol IP controller for requesting a UNI tunnel state of a user network side interface, wherein the IP controller includes:

a generating unit, configured to generate a UNI tunnel state request message, where the UNI tunnel state request message carries a UNI tunnel state request identifier, where the UNI tunnel state request identifier is used to indicate that when the state of the UNI tunnel is changed from the first state to the second state In the state, requesting to send information of the changed second state of the UNI tunnel;

And a sending unit, configured to send the UNI tunnel state request message generated by the generating unit to the light controller.
The IP controller of claim 9 wherein:

The UNI tunnel status request message is an open message in the path calculation unit communication protocol PCEP, and the open message includes an option Optional field, where the Optional field carries the UNI tunnel status request identifier.
The IP controller according to claim 10, characterized in that

The Optional field includes a type, a length, and a value, and the type carries a type value, where the type value is used to indicate that the type of the Optional field is a second state that indicates whether the UNI tunnel is requested to be changed. The information indicates the length of the Optional field, and the flag bit flag in the Value carries the UNI tunnel status request identifier, indicating that when the state of the UNI tunnel changes from the first state to the second state And requesting information of the changed second state of the UNI tunnel.
The IP controller according to any one of claims 9-11, wherein the IP controller further comprises:

a receiving unit, configured to receive a UNI tunnel status advertisement message sent by the optical controller, where the UNI tunnel status advertisement message carries a UNI tunnel status advertisement identifier, an identifier of the UNI tunnel, and a status of the UNI tunnel, The UNI tunnel status advertisement identifier is used to indicate that the type of the UNI tunnel status advertisement message is information for advertising the second state after the UNI tunnel is changed;

a parsing unit, configured to parse the UNI tunnel status advertisement message received by the receiving unit to obtain information about the second state;

An update unit, configured to update first state information corresponding to the identifier of the UNI tunnel by using the information of the second state;

An obtaining unit, configured to acquire, according to the information of the second state after the UNI tunnel is updated, the reachability of the virtual network topology VNT link, where the VNT link is bound to the UNI tunnel;

a path calculation unit, configured to calculate a transmission path of the service data flow according to the reachability of the VNT link.
An optical controller for informing a UNI tunnel state of a user network side interface, wherein the optical controller comprises:

a receiving unit, configured to receive a UNI tunnel status request message sent by the Internetwork Protocol (IP) controller, where the UNI tunnel status request message carries a UNI tunnel status request identifier, where the UNI tunnel status request identifier is used to indicate the status of the UNI tunnel When the first state is changed to the second state, requesting to send information of the changed second state of the UNI tunnel;

An acquiring unit, configured to acquire information about the identifier of the UNI tunnel and the second state when the state of the UNI tunnel is changed from the first state to the second state;

a generating unit, configured to generate the UNI tunnel status advertisement message, where the UNI tunnel status advertisement message includes: a UNI tunnel status advertisement identifier, an identifier of the UNI tunnel, and information about the second state, the UNI tunnel status advertisement And indicating that the type of the UNI tunnel status advertisement message is information for advertising the second state after the UNI tunnel is changed;

And a sending unit, configured to send the UNI tunnel status advertisement message to the IP controller.
The light controller of claim 13 wherein:

The UNI tunnel state advertisement information is a path calculation advertisement PCNtf message, where the PCNtf message includes an advertisement type NT field, an advertisement value NV field, and an option Optional field, where the NT field carries a first type value. The first type value indicates that the type of the PCNtf message is information for advertising the second state after the UNI tunnel is changed, and the NV field indicates information of the second state that is advertised by the PCNtf message. The Optional field carries the identifier of the UNI tunnel.
The light controller of claim 14 wherein:

The Optional field includes a type Type, a length length, and a value value, where the Type carries a second type value, and the second type value indicates that the type of the Optional field is an identifier that represents the UNI tunnel, and the Length indication The length of the Optional field, the value indicating the identifier of the UNI tunnel, the value including the source address of the UNI tunnel, the IPv4 Tunnel Sender Address, the label switching path LSP ID, the tunnel tunnel ID, the extended tunnel Extended Tunnel ID, and Destination address IPv4 Tunnel Endpoint Address.
The light controller according to any one of claims 13-15, wherein the obtaining unit comprises:

a receiving subunit, configured to receive connection change information of the first optical network device and the second optical network device sent by the first optical network device;

An information acquiring subunit, configured to obtain, according to the connection change information, an identifier of the UNI tunnel established between the first optical network device and a second optical network device, and the UNI tunnel changes from the first state The information of the second state after the second state.
A system for obtaining a state of a UNI tunnel of a user network side interface, the system comprising:

The Internet Protocol IP controller for requesting a UNI tunnel state according to any one of claims 9 to 12, and the optical controller for announcing the UNI tunnel state according to any one of claims 13-16.