Faulty multi-layer link restoration method and controller

1. A troubleshooting method comprising:

obtaining that a fault occurs on a first multi-layer link passing through a first port on a first network device, wherein the first multi-layer link is a link in a link aggregation group between the first network device and a second network device, the first multi-layer link comprises a first cross-layer link, and the first cross-layer link spans different types of networks;

based upon the obtaining that the fault occurs on the first multi-layer link, establishing a second multi-layer link used for restoration of the first multi-layer link, based on a first idle port on the first network device and a second idle port on a target network device, wherein the second multi-layer link comprises a second cross-layer link, and the second cross-layer link spans the different types of networks; and

adding the second multi-layer link to a target link aggregation group between the first network device and the target network device.

2. The method according to claim 1 , the method further comprising:

releasing an optical layer resource of the first multi-layer link and deleting the first multi-layer link from the link aggregation group.

3. The method according to claim 1 , wherein the obtaining that the fault occurs on the first multi-layer link passing through the first port on the first network device comprises:

determining that a fault occurs on the first port on the first network device; and

determining, based on the fault occurring on the first port, that the fault occurs on the first multi-layer link.

4. The method according to claim 1 , wherein the obtaining that the fault occurs on the first multi-layer link passing through the first port on the first network device comprises:

determining that a node fault occurs on the second network device;

determining that the first multi-layer link passes through the first port and the second network device; and

determining that the fault occurs on the first multi-layer link based on the determination that the node fault occurs on the second network device and the determination that the first multi-layer link passes through the first port and the second network device.

5. The method according to claim 1 , wherein the different types of networks spanned by the first cross-layer link and the second cross-layer link includes an optical network and an IP network.

6. The method according to claim 1 , wherein establishing the second multi-layer link based on the first idle port on the first network device and the second idle port on the target network device comprises:

corresponding to obtaining the fault occurs on the first multi-layer link, establishing the second multi-layer link based on the first idle port on the first network device and the second idle port on the target network device.

7. The method according to claim 3 , wherein the target network device is the second network device, the first idle port is a port on the first network device, and the second idle port is a port on the first multi-layer link.

8. The method according to claim 4 , wherein the target network device is a third network device, the first idle port is the first port, the second idle port is a port on the third network device.

9. The method according to claim 1 , wherein the obtaining that a fault occurs on a first multi-layer link passing through a first port on a first network device comprises:

obtaining that a port fault occurs on the first multi-layer link on the second network device;

determining that the fault occurs on the first multi-layer link.

10. The method according to claim 9 , wherein the target network device is the second network device, the first idle port is the first port, and the second idle port is a port on the second network device.

11. A controller comprising:

a memory, configured to store computer readable instructions;

a processor in communication with the memory, configured to execute the computer readable instructions to:

obtain that a fault occurs on a first multi-layer link passing through a first port on a first network device, wherein the first multi-layer link is a link in a link aggregation group between the first network device and a second network device, the first multi-layer link comprises a first cross-layer link, and the first cross-layer link spans different types of networks;

based upon the obtaining that the fault occurs on the first multi-layer link, establish a second multi-layer link to restore the first multi-layer link, based on a first idle port on the first network device and a second idle port on a target network device, wherein the second multi-layer link comprises a second cross-layer link, and the second cross-layer link spans the different types of networks; and

add the second multi-layer link to a target link aggregation group between the first network device and the target network device.

12. The controller according to claim 11 , wherein the processor is further configured to execute the computer readable instructions to:

release an optical layer resource of the first multi-layer link and delete the first multi-layer link from the link aggregation group.

13. The controller according to claim 11 , wherein the processor is further configured to execute the computer readable instructions to:

determine that a fault occurs on the first port on the first network device; and

determine, based on the fault occurring on the first port, that the fault occurs on the first multi-layer link.

14. The controller according to claim 11 , wherein the processor is further configured to execute the computer readable instructions to:

determine that a node fault occurs on the second network device;

determine that the first multi-layer link passes through the first port and the second network device; and

determine that the fault occurs on the first multi-layer link based on the determination that the node fault occurs on the second network device and the determination that the first multi-layer link passes through the first port and the second network device.

15. The controller according to claim 11 , wherein the different types of networks spanned by the first cross-layer link and the second cross-layer link includes an optical network and an IP network.

16. The controller according to claim 11 , wherein the processor is further configured to execute the computer readable instructions to:

corresponding to obtaining the fault occurs on the first multi-layer link, establish the second multi-layer link based on the first idle port on the first network device and the second idle port on the target network device.

17. The controller according to claim 13 , wherein the target network device is the second network device, the first idle port is a port on the first network device, and the second idle port is a port on the first multi-layer link.

18. The controller according to claim 14 , wherein the target network device is a third network device, the first idle port is the first port, the second idle port is a port on the third network device.

19. The controller according to claim 11 , wherein the processor is further configured to execute the computer readable instructions to:

obtain that a port fault occurs on the first multi-layer link on the second network device;

determine that the fault occurs on the first multi-layer link.

20. The controller according to claim 19 , wherein the target network device is the second network device, the first idle port is the first port, and the second idle port is a port on the second network device.

21. A non-transitory computer-readable storage media storing instructions which upon execution by a computer system perform steps comprising:

determining that a fault occurs on a first multi-layer link passing through a first port on a first network device, wherein the first multi-layer link is a link in a link aggregation group between the first network device and a second network device, the first multi-layer link comprises a first cross-layer link, and the first cross-layer link spans different types of networks;

based upon the obtaining that the fault occurs on the first multi-layer link, establishing a second multi-layer link used for restoration of the first multi-layer link, based on a first idle port on the first network device and a second idle port on a target network device, wherein the second multi-layer link comprises a second cross-layer link, and the second cross-layer link spans the different types of networks; and

adding the second multi-layer link to a target link aggregation group between the first network device and the target network device.

22. The non-transitory computer-readable storage media according to claim 21 , the steps further comprising:

releasing an optical layer resource of the first multi-layer link and deleting the first multi-layer link from the link aggregation group.

23. The non-transitory computer-readable storage media according to claim 21 , wherein:

the determining that the fault occurs on the first multi-layer link comprises determining that a fault occurs on the first port on the first network device or determining that a fault occurs at the second network device; and

based upon the determining that the fault occurs on the first port on the first network device, the target network device is defined to be the second network device; or

based upon the determining that the fault occurs at the second network device, the target network device is defined to be a third network device.

24. The non-transitory computer-readable storage media according to claim 21 , wherein the different types of networks spanned by the first cross-layer link and the second cross-layer link includes an optical network and an IP network.