WO2012109860A1

WO2012109860A1 - Method, device and system for establishing label switching path

Info

Publication number: WO2012109860A1
Application number: PCT/CN2011/077801
Authority: WO
Inventors: 郝卫国
Original assignee: 华为技术有限公司
Priority date: 2011-07-29
Filing date: 2011-07-29
Publication date: 2012-08-23
Also published as: CN102318293A; CN102318293B

Abstract

An embodiment of the present invention relates to the technical field of communication. Provided are a method, device and system for establishing a label switching path, the method comprises: a source data communication device conducting an LMP negotiation with a source optical network device to learn the address information of the source optical network device, and installing a route between the source data communication device and the source optical network device according to the address information of the source optical network device; sending a Resource Reservation Protocol (RSVP) packet to the source optical network device according to the route between the source data communication device and the source optical network device, the RSVP packet carries bandwidth information and address information of a target data communication device to enable the source optical network device to calculate a label switching path to the target data communication device according to the bandwidth information and the address information of the target data communication device, thereby establishing a label switching path between the source data communication device and the target data communication device.

Description

Method, device and system for establishing label switching path

Technical field

The present invention relates to the field of communications technologies, and in particular, to a method, device, and system for establishing a label switching path. Background technique

With the continuous expansion of 3G (3rd-Generation, 3rd generation mobile communication), packet network, and bandwidth data services, a new network technology that can automatically complete the label switching path establishment-GMPLS (Generalized Multi-Protocol Label Switching) Multi-protocol label switching) came into being. In the GMPLS network, including the data communication device and the optical network device, the source data communication device and the sink data communication device are interconnected by the optical network device, and the source data is unified.

The signaling device can initiate a label switching path to the sink data communication device through GMPLS signaling according to the service requirement.

Currently, one of the models for interworking between data communication and optical network equipment in a GMPLS network is the Overlay (overlay) model, which is also called the GMPLS UNI (User-Network Interface) model. In the Overlay model, the RSVP (Resource Reservation Protocol) signaling packet can be sent in two ways: 1. The user statically configures the outgoing interface of the signaling packet. Generally, you need to specify the outbound interface address of the source data communication device. The inbound and outbound interfaces of the source optical network device, the inbound and outbound addresses of the sink optical network device, and the inbound interface address of the sink data communication device, and then sent according to the specified outbound interface. 2. Configure static routes, according to routes. The outgoing interface is sent.

For dynamic LMP (Link Management Protocol), the connected device address is dynamically discovered, the administrator of the source data communication device and the sink data communication device, and the administrator of the source optical network device and the sink optical network device may The administrator of the two devices may not know the address of the other device in advance. Therefore, sending the signaling packet by specifying the outgoing interface or configuring the static route is not good for the user experience. In addition, if the peer device changes. If the address is static, the local device needs to change the destination address of the static route. The data communication device and the optical network device are often maintained by two departments. If the coordination between the two departments is difficult, the network operation and maintenance is increased. Difficulty. Summary of the invention

In order to solve the problems in the prior art, the present invention provides a method, device and system for establishing a label switching path. System.

In one aspect, a method for establishing a label switching path is provided, and the method includes:

The source data communication device performs the LMP negotiation with the source optical network device, learns the address information of the source optical network device, and installs a route with the source optical network device according to the address information of the source optical network device;

Transmitting a resource reservation protocol RSVP packet to the source optical network device according to the route between the source optical network device, where the RSVP packet carries bandwidth information and address information of the sink data communication device, so that the The source optical network device calculates a label switching path to the sink data communication device according to the bandwidth information and the address information of the sink data communication device, thereby establishing a connection between the source data communication device and the sink data communication device. The label switching path.

In another aspect, a source data communication device is provided, the device comprising:

The installation module is configured to perform LMP negotiation with the source optical network device, learn address information of the source optical network device, and install a route with the source optical network device according to the address information of the source optical network device. ;

a sending module, configured to send a resource reservation protocol RSVP packet to the source optical network device according to the routing indication with the source optical network device, where the RSVP packet carries bandwidth information and a sink data communication device Address information, causing the source optical network device to calculate a label switching path to the sink data communication device according to the bandwidth information and address information of the sink data communication device, thereby the source data communication device and the The label switching path is established between the sink data communication devices.

In another aspect, a source optical network device is provided, the device comprising:

An installation module, configured to perform link management protocol LMP negotiation with the source data communication device, learn address information of the source data communication device, and install and the source data communication device according to the address information of the source data communication device. Routing between

a receiving module, configured to receive a resource reservation protocol RSVP packet sent by the source data communication device, where the RSVP packet is sent by the source data communication device according to a route between the source optical network device and the source optical network device The source optical network device, and the RSVP packet carries bandwidth information and address information of the sink data communication device;

a calculation module, configured to calculate, according to the bandwidth information and address information of the sink data communication device, a label switching path to the sink data communication device, thereby between the source data communication device and the sink data communication device Establishing the label switching path.

In another aspect, a system for establishing a label switched path is provided, the system comprising: the source data communication device as described above and the source optical network device as described above.

The technical solution provided by the embodiment of the present invention has the following beneficial effects: the source/sink data communication device and the source/sink optical network device learn the address of the peer device through the LMP protocol, and install the host route to the peer device, thereby establishing a label switching path. The source data communication device searches for the outbound interface address of the corresponding source optical network device according to the host route. The outbound interface sends the signaling packet to the source optical network device, so that the source optical network device can automatically calculate the path to the sink data communication device, thereby greatly reducing the configuration of the network operation and maintenance personnel and facilitating network deployment. DRAWINGS

1 is a flowchart of a method for establishing a label switching path according to an embodiment of the present invention;

2 is a flowchart of a method for establishing a label switching path according to still another embodiment of the present invention;

3 is a data transmission network model provided by the embodiment of the present invention;

4 is a schematic structural diagram of a source data communication device according to another embodiment of the present invention;

FIG. 5 is a schematic structural diagram of another source data communication device according to another embodiment of the present invention; FIG.

6 is a schematic structural diagram of a source optical network device according to another embodiment of the present invention;

7 is a schematic diagram of a system for establishing a label switching path according to another embodiment of the present invention, and a specific implementation manner.

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

Referring to FIG. 1, an embodiment of the present invention provides a method for establishing a label switching path, including:

The source data communication device performs the link management protocol LMP negotiation with the source optical network device, learns the address information of the source optical network device, and installs and describes according to the learned address information of the source optical network device. Routing between source optical network devices;

102: Send a resource reservation protocol to the source optical network device according to a route between the source optical network device and the source optical network device.

An RSVP packet, where the RSVP packet carries the bandwidth information and the address information of the sink data communication device, so that the source optical network device calculates the arrival of the sink data communication according to the bandwidth information and the address information of the sink data communication device. A label switched path of the device to establish the label switched path between the source data communication device and the sink data communication device.

In the method for establishing a label switching path provided by this embodiment, the source data communication device may establish a route with a source optical network device, or may establish a reason with multiple source optical network devices, which is not specifically limited in this embodiment. .

The source data communication device performs the link management protocol LMP negotiation with the source optical network device to learn the address information of the link management protocol source optical network device, including:

The source data communication device establishes a control channel with the source optical network device;

Receiving, by the control channel, the first configuration packet sent by the source optical network device, where the first configuration packet carries address information of the source optical network device;

And learning address information of the source optical network device according to the first configuration packet. Further, in the method for establishing a label switching path provided by the embodiment, when the control channel interface is a wide/^ type interface, for example, an Ethernet interface, the first configuration packet carries the source optical network. The next hop address of the device, the next hop address of the source optical network device is used to indicate an inbound interface address on the source optical network device of the control channel established between the source data communication device and the source optical network device .

Further, the method for establishing a label switching path provided by the embodiment may further include:

The source data communication device sends a second configuration packet to the source optical network device by using the control channel established by the source optical network device, where the second configuration packet carries the source data communication device The address information, so that the source optical network device learns the address information of the source data communication device.

After receiving the address information of the source data communication device, the source optical network device broadcasts the address information of the source data communication device to the optical network where the source optical network device is located, so that other optical networks in the optical network are enabled. The device may also know the address information of the source data communication device. For example, for the source optical network device or the sink optical network device, the address information and port address and bandwidth information learned by the LMP can be imported into the internal routing protocol of the optical network, and spread to the entire optical network through the internal routing protocol of the optical network. The optical network device in the optical network can learn the route to the data communication device and the connected data link bandwidth information.

The second configuration packet carries the next hop address of the source data communication device, and the next hop address of the source data communication device is used as the source of the indication. The outbound interface address of the source data communication device of the control channel between the data communication device and the source optical network device.

The technical solution provided by the embodiment of the present invention has the following beneficial effects: the source/sink data communication device and the source/sink optical network device learn the address of the peer device through the LMP protocol, and install the host route to the peer device, thereby establishing a label switching path. The source data communication device searches for the outbound interface address of the corresponding source optical network device according to the host route, and sends the signaling packet to the source optical network device through the outbound interface, so that the source optical network device can automatically calculate the arrival address. The path of the data communication device greatly reduces the configuration work of the network operation and maintenance personnel and facilitates network deployment. Referring to FIG. 2, an embodiment of the present invention provides a method for establishing a label switching path, including:

The source data communication device and the source optical network device perform the LMP protocol negotiation through the GMPLS control channel to obtain the address information of the other party, and the source data communication device installs the source light according to the address information of the source optical network device. Routing between network devices.

In this embodiment, the source node and the destination node are both data communication devices, and the intermediate nodes are optical network devices. In the entire transmission network, the optical network device adjacent to the source data communication device (hereinafter referred to as source C) is called A source optical network device (hereinafter referred to as source N), which is an optical network device adjacent to a sink data communication device (hereinafter referred to as sink C) is called a sink optical network. Equipment (hereinafter referred to as sink N). For example, the transmission network model provided in FIG. 3 includes a source C100, a source N200, an optical transmission network, a sink N400, and a sink C500, where a label switching path needs to be established between the source C100 and the sink C500, and between the source N200 and the sink N400. Optical transmission network.

In this embodiment, before the label switching path is established, a host route to the other party is installed between the source C100 and the source N200, and between the sink N400 and the sink C500, for example, the source data communication device is installed to reach the source optical network device. Routing, the source optical network device installs a route to the source data communication device, the sink data communication device installs a route to the sink optical network device, and the sink optical network device installs a route to the sink data communication device. In addition, the source N200 and the sink N400 may further include other optical network devices in the optical transmission network, and the source data communication device may also be connected to multiple source optical network devices, and the source data communication device may select different source lights. The network device device establishes a label switching path.

In this embodiment, a link management protocol LMP (Link) can be performed between the source data communication device and the source optical network device.

Management Protocol) negotiation in order to obtain the address information of the end device, such as a router identification _{LSRID (Label Switching Router Identity) 0} LMP protocol label switching device to the end of the control channel CC (Control channel) and the data link and manage Correlation, where CC is the GMPLS control channel, specifically the inband or outband channel, the inband channel refers to the control packet and the transmitted data packet is in the same physical channel, and the outband channel refers to the control packet. The data packet is in different physical channels. For example, the data packet is sent on Ethernet interface 1, and the control packet is sent on Ethernet interface 2. The LMP function of the link management protocol specifically includes: 1. Automatic discovery and maintenance of the control channel; 2. Verification of data link connectivity; 3. Association of traffic engineering TE link links at both ends of the link Link ID, interface identifier InterfacelD The mapping relationship is used to verify and synchronize TE parameters of nodes at both ends of the TE link, such as bandwidth and interface switching capability, and the relationship between traffic engineering links and data links. 4. Data link fault management capability.

In this embodiment, after the LMP protocol is introduced between the source data communication device and the source optical network device, the source data communication device and the source optical network device first establish a control channel, a source data communication device, and a source optical network device through the LMP protocol. The source optical network device sends config (configuration) packets to each other through the control channel. The config packet carries the LSRID (Label Switching Router Identity) of the local device. The config packet exchange can learn the LSRID address of the peer. In this embodiment, the source C receives the first config packet sent by the at least one source optical network device by using the control channel, where the first config packet carries the address information of the source optical network device, and learns the source light according to the first config packet. The address information of the network device.

Further, the source data communication device may also send the second config message to the source optical network device by using the CC, where the second config message carries the address information of the source data communication device, so that the source optical network device learns the source data. Address information of the communication device.

In this embodiment, the sink N and the sink C also perform the LMP negotiation. The specific process is the same as the negotiation process of the source C and the source N. In this embodiment, after the LMP protocol is up (successful), the source data communication device and the source optical network device automatically trigger the installation of the host route to the peer LSRID, and the outbound interface of the route is the control channel interface.

Further, in this embodiment, if the interface of the control channel is a broadcast type interface, such as an Ethernet interface, the next hop address needs to be specified, and the next hop address is the peer address of the control channel interface, which is the received config packet. Source IP address, where source C is the inbound interface address of source N, and source N is the outbound interface address of source C. Specifically, when the source N is an Ethernet interface, the next hop address of the source N is carried in the first config packet, and the next hop address of the source N is used to indicate the source N of the CC between the source C and the source source N. The inbound interface address; when the source C is an Ethernet interface, the second config packet carries the next hop address of the source C, and the next hop address of the source C is used to indicate the source C of the CC between the source C and the source N. interface address.

Further, in this embodiment, the source N and the sink N not only install the host route, but also introduce the address to the 0SPF.

(Open Shortest Path First), published to each node inside the optical network. For example, for the optical network source N or the sink N device, the peer LSRID and TELINK address and bandwidth information learned by the LMP can be imported into the optical network internal routing protocol 0SPF-TE, and spread to the entire optical network through the 0SPF-TE message. Each optical network device can learn the route to the data communication device and the connected data link bandwidth information.

202: The source data communication device sends an RSVP message to the source optical network device according to the route between the source optical network device and the source optical network device.

In this embodiment, after receiving the instruction to establish the label switching path, the source data communication device sends an RSVP message to the source optical network device, where the RSVP message carries the bandwidth information of the data link and the address information of the sink data communication device. The RSVP message is a PATH message.

Further, in this embodiment, if there are multiple source optical network devices, multiple control channels may be established between the source data communication device and the source optical network device, and when the host route is installed, if the LMP protocol will be used for all control channels If the route priority is set to the same, the route is in load balancing mode. If the route priority of a CC channel is increased, the route is in active/standby mode. If a load balancing route is formed, the RSVP message will be sent in a load-sharing manner on multiple control channels. If an active/standby route is formed, the RSVP message will be sent to a certain control channel.

In this embodiment, when the source C creates a GMPLS UNI LSP, it only needs to specify the address and bandwidth information of the sink data communication device that creates the UNI LSP to the source C. The bandwidth information is the bandwidth information of the label forwarding path that needs to be established, and does not need to be specified. path. Because the source C device can know which optical network devices are connected by the LMP protocol, for example, the LSRID addresses of the optical network devices connected to the source C device are LSRID1, LSRID2, ... until LSRIDM, where M represents the Mth source optical network device. Therefore, source C can actively connect to source N according to the address of the optical network device that it knows. If there are multiple control channels, and multiple control channels are in the form of active and standby routes, source C can be preceded by high priority. The control channel sends an RSVP message. If multiple control channels are load-sharing routes, source C can The RSVP message is sent one by one on multiple control channels. For example, in this embodiment, the source C and the source optical network device LSRID LSRID2 are in a load sharing manner, and the source C device first attempts to send the source optical network device LSRID1 after obtaining the instruction to create the label switching path. The RSVP message, for example, the source C is based on the address of the source optical network device LSRID1, and if the outbound interface of the route is the control channel CC1, the local address of the CC1 (the outbound interface address of the CC on the source C) and the remote end are used. The address (the address of the inbound interface of the CC on the source N1) is filled in the display path object ERO (Explicit Route Object) in the PATH message, and then the packet is sent to the peer source optical network device LSRID1 for creating the UNI LSP.

203: The source optical network communication device calculates a label switching path to the sink data communication device according to the bandwidth information carried in the RSVP message and the address information of the sink data communication device, thereby establishing label switching between the source data communication device and the sink data communication device. path.

In this embodiment, after receiving the PATH message sent by the source C, the source N automatically calculates the label switching path inside the optical network by using the constrained shortest path first CSPF (Constrained Shortest Path First) protocol according to the sink C address and the bandwidth information. After the path is calculated, the intermediate node is processed by carrying the display path information in the signaling message to establish a label switching path between the source C and the sink C.

For example, referring to FIG. 3, if the source N200 calculates a path that traverses the optical network to the sink C500, the source N200 firstly according to the inbound interface address of the CC1 carried by the ER0 in the PATH message sent by the source C100 on the source N200. The corresponding inbound interface is found, the bandwidth resource is reserved on the inbound interface, and the label is allocated on the local outbound interface to establish a forward LSP cross-connection entry, and the ER0 of the PATH message is replaced with the path information calculated by the local CSPF. The address (the outgoing interface address of the source N200) and the remote address (the inbound interface address of the downstream optical network device connected to the source N200) are filled in the ER0, and then the PATH message is sent to the downstream optical network device, the downstream optical network. After receiving the PATH message sent by the source N200, the device reserves bandwidth on the inbound interface according to the ER0 information, allocates a label on the outbound interface, and establishes a forward LSP cross-connection entry to continue the PATH message to the calculated path. After the downstream optical network device sends, the intermediate optical network device in the optical transmission network and the sink N400 receive the PATH message, and the intermediate optical network is repeated. The processing flow of the device, the sink N400 finally sends the PATH message to the sink C500, and the sink C500 reserves the bandwidth resource on the inbound interface, and establishes a forward connection entry of the local LSP, thereby creating a slave C500 to the source C100 that traverses the optical transport network. Forward LSP. After processing the PATH message, the sink C500 responds to the RESV message to the sink N400, and reserves bandwidth resources on the inbound interface of the sink C500, allocates labels on the outbound interface, and establishes a reverse LSP connection entry. After the sink N400 receives the RESV message, The bandwidth resource is reserved on the inbound interface, the label is allocated on the outbound interface, the reverse LSP connection entry is established, and the RESV message is continuously sent to the upstream optical network device until the last RESV message reaches the source C100, thereby creating a traversing optical transmission network. Reverse LSP from source C100 to sink C500. For example, in this embodiment, if the source optical network device LSRID1 does not reach the path of the sink C500, the source optical network device LSRID1 responds to the PATH ERR message to the source C100, and the source C100 can After the PATH message is sent to other source optical network devices, the other source optical network devices that have received the PATH message perform steps 202 and 203 again, and details are not described herein again.

Further, in this embodiment, if the user knows which source optical network device the UNI LSP that arrives at the sink C500 passes, the address of the source optical network device may be increased in the display path, and the time used by the source C100 device for attempting to establish is reduced. For example, if the user knows that the source optical network device N200 needs to be used to create a label switching path, the address information of the source optical network device N200 can be added to the display path, so that the source C100 can directly according to the address information of the source N200. The source optical network device N200 establishes a connection, thereby preventing the source C100 from attempting to establish a connection one by one in the route installed with the plurality of source optical network devices.

In this embodiment, the CC channel may be in-band or out-of-band, and the in-band CC channel is abstracted into an interface. When the route is installed, the outgoing interface of the route may be an in-band or out-of-band interface. In addition, the specific process of establishing an LSP is a way to establish an LSP, and all systems are not required to be. The forward LSP outgoing label and the reverse LSP incoming label may be the same; the forward LSP incoming label and the reverse LSP outgoing label may be the same. This embodiment is not specifically limited.

The method of the present invention provides the following advantages: The source/sink data communication device and the source/sink optical network device learn the address of the peer device through the LMP protocol, and install the host route to the peer device, thereby establishing a label switching path. The RSVP source data communication device searches for the outbound interface address information of the corresponding source optical network device according to the host route, and sends the signaling packet to the source optical network device through the outbound interface. The source optical network device and the sink optical network device device need to introduce the address of the other party learned through the LMP protocol into a routing protocol such as its own SPP or intermediate system ISIS (intermidiate system intermediate system), and flood the optical transmission network. The source optical network device receives the RSVP message sent by the source data communication device, and can automatically calculate the path to the sink data communication device according to the CSPF algorithm. Referring to FIG. 4, an embodiment of the present invention provides a source data communication device 100, including: an installation module 100a and a sending module 100b.

The installation module 100a is configured to perform a link management protocol LMP negotiation with the source optical network device, learn address information of the source optical network device, and install and the source optical network according to the address information of the source optical network device. Routing between devices;

The sending module 100b is configured to send, according to a route with the source optical network device, a resource reservation protocol RSVP packet, where the RSVP packet carries bandwidth information and a sink data communication device. The address information causes the source optical network device to calculate a label switching path to the sink data communication device according to the bandwidth information and the address information of the sink data communication device. Referring to FIG. 5, in this embodiment, the installation module 100a specifically includes:

Establishing a unit 100al, configured to establish a control channel with the source optical network device;

The receiving unit 100a2 is configured to receive, by using a control channel established by the source optical network device, a first configuration packet sent by the source optical network device, where the first configuration packet carries address information of the source optical network device;

The learning unit 100a3 is configured to learn address information of the source optical network device according to the first configuration message.

The installation module 100a may further include: a sending unit 100a4, configured to send, by using a control channel, a second configuration packet to the source optical network device in a second configuration packet, by using the establishing unit 100a and the receiving unit 100a2. Carrying the address information of the source data communication device, so that the source optical network device learns the address information of the source data communication device. Referring to FIG. 6, an embodiment of the present invention further provides a source optical network device 200, including: an installation module 200a, a receiving module 200b, and a computing module 200c.

The installation module 200a is configured to perform link management protocol LMP negotiation with the source data communication device, learn address information of the source data communication device, and install and communicate with the source data according to the address information of the source data communication device. Routing between devices;

The receiving module 200b is configured to receive a resource reservation protocol RSVP packet sent by the source data communication device, where the RSVP packet is sent by the source data communication device according to a route between the source optical network device and the source optical network device. The source optical network device, and the RSVP packet carries bandwidth information and address information of the sink data communication device;

The calculating module 200c is configured to calculate, according to the bandwidth information and the address information of the sink data communication device, a label switching path to the sink data communication device, to establish between the source data communication device and the sink data communication device Label exchange path.

For example, the installation module 200a may specifically include:

Establishing a unit, configured to establish a control channel with the source data communication device;

a receiving unit, configured to receive, by using a control channel established by the source data communication device, a second configuration packet sent by the source data communication device, where the second configuration packet carries address information of the data communication device ;

a learning unit, configured to learn address information of the source data communication device according to the second configuration message.

Further, in this embodiment, the installation module 200a further includes:

a sending unit, configured to send, by using the control channel, a first configuration packet to the source data communication device, where the first configuration packet carries address information of the source optical network device, so that the source data communication device Learning the address information of the source optical network device.

In this embodiment, the source optical network device further includes: a broadcast module, configured to: after the receiving unit receives the address information of the source data communication device, broadcast the address information of the source data communication device to a device in an optical network where the source optical network device is located .

The beneficial effects of the device embodiments provided by the present invention are: source/sink data communication device and source/sink optical network device pass

The LMP protocol learns the address of the other party and installs the host route to the other device. When the label switching path is established, the corresponding outgoing interface can be found according to the host route, and the RSVP message is sent to the other party through the outbound interface. The source optical network device can automatically calculate the path to the sink data communication device, thereby greatly reducing the configuration work of the network operation and maintenance personnel and facilitating network deployment.

Referring to FIG. 7, an embodiment of the present invention further provides a system for establishing a label switching path, including: the source data communication device 100 as described above and the source optical network device 200 as described above.

The LMP protocol learns the address of the other party and installs the host route to the other device. When the label switching path is established, the source data communication device searches for the outbound interface address information of the corresponding source optical network device according to the host route. The RSVP message is sent to the source optical network device, so that the source optical network device can automatically calculate the path to the sink data communication device, thereby greatly reducing the configuration of the network operation and maintenance personnel and facilitating network deployment.

The source data communication device, the source optical network device, and the system for establishing the label switching path provided by this embodiment are the same as the method embodiment. For details, refer to the method embodiment, and details are not described herein again.

Embodiments of the invention may be implemented in software, and the corresponding software program may be stored in a readable storage medium, such as a hard disk, a cache, or an optical disk of a computer.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., which are within the spirit and scope of the present invention, should be included in the protection of the present invention. Within the scope.

Claims

Claim

A method for establishing a label switching path, the method comprising:

The source data communication device performs a link management protocol LMP negotiation with the source optical network device, learns the address information of the source optical network device, and installs and the source optical network device according to the address information of the source optical network device. And routing a resource reservation protocol RSVP packet to the source optical network device according to the route between the source optical network device, where the RSVP packet carries bandwidth information and address information of the sink data communication device And causing the source optical network device to calculate a label switching path that reaches the sink data communication device according to the bandwidth information and address information of the sink data communication device, and establish the source data communication device according to the path and A label switching path between the sink data communication devices.

The method according to claim 1, wherein the source data communication device performs LMP negotiation with the source optical network device, and learns the address information of the source optical network device, including:

And receiving, by the control channel established by the source optical network device, a first configuration packet sent by the source optical network device, where the first configuration packet carries address information of the source optical network device;

And learning address information of the source optical network device according to the first configuration packet.

The method according to claim 2, wherein when the control channel is an Ethernet interface, the method further includes:

The first configuration packet carries a next hop address of the source optical network device, and the next hop address of the source optical network device is used to indicate between the source data communication device and the source optical network device. The inbound interface address of the source optical network device of the control channel.

The method according to claim 1 or 2, wherein the method further comprises:

The source data communication device sends a second configuration packet to the source optical network device by using a control channel established with the source optical network device, where the second configuration packet carries an address of the source data communication device And causing the source optical network device to learn address information of the source data communication device.

The method according to any one of claims 1 to 4, wherein the method further comprises:

After receiving the address information of the source data communication device, the source optical network device broadcasts the address information to the office The device in the optical transmission network where the source optical network device is located.

The method according to any one of claims 1-5, wherein when the control channel is an Ethernet interface, the method further includes:

The second configuration packet carries a next hop address of the source data communication device, and the next hop address of the source data communication device is used to indicate control between the source data communication device and the source optical network device The outbound interface address of the source data communication device of the channel.

A source data communication device, the device comprising:

The installation module is configured to perform a link management protocol LMP negotiation with the source optical network device, learn address information of the source optical network device, and install and the source optical network device according to the address information of the source optical network device. a routing module, configured to send a resource reservation protocol RSVP packet to the source optical network device according to a route between the source optical network device, where the RSVP packet carries bandwidth information and a sink Address information of the data communication device, causing the source optical network device to calculate a label switching path to the sink data communication device according to the bandwidth information and the address information of the sink data communication device, to the source data The label switching path is established between the communication device and the sink data communication device.

The device according to claim 7, wherein the installation module comprises:

Establishing a unit, configured to establish a control channel with the source optical network device;

a receiving unit, configured to receive, by using a control channel established with the source optical network device, a first configuration packet sent by the source optical network device, where the first configuration packet carries address information of the source optical network device ;

The learning unit is configured to learn address information of the source optical network device according to the first configuration packet.

The device according to claim 7 or 8, wherein the installation module further comprises:

a sending unit, configured to send, by using the control channel, a second configuration packet to the source optical network device, where the second configuration packet carries address information of the source data communication device, so that the source optical network device Learning the address information of the source data communication device.

A source optical network device, the device comprising:

An installation module, configured to perform link management protocol LMP negotiation with the source data communication device, to learn the source data communication Address information of the device, and installing a route with the source data communication device according to the address information of the source data communication device;

a calculation module, configured to calculate, according to the bandwidth information and address information of the sink data communication device, a label switching path to the sink data communication device, to be between the source data communication device and the sink data communication device Establishing the label switching path.

The device according to claim 10, wherein the installation module comprises:

The device according to claim 10 or 11, wherein the installation module further includes: a sending unit, configured to send, by using the control channel, a first configuration packet to the source data communication device, where The address information of the source optical network device is carried in the first configuration packet, so that the source data communication device learns the address information of the source optical network device.

The device according to any one of claims 10-12, wherein the device further comprises: a broadcast module, configured to: after the receiving unit receives the address information of the source data communication device, The address information is broadcast to all devices in the optical network where the source optical network device is located.

A system for establishing a label switching path, the system comprising: the source data communication device according to any one of claims 7-9, and the source light according to any one of claims 10-13 Internet equipment.