Abstract: The present application discloses a link state information advertisement method and device, including: receiving, by a first network device, network topology information sent by a control device, where the network topology information includes link state information, which is generated by the control device, between the first network device and a second network device, the first network device supports an IGP, and the second network device does not support the IGP; and advertising the link state information between the first network device and the second network device. The first network device advertises the link state information to other network devices supporting the IGP, therefore implementing that a network device supporting the IGP in multiple network devices controlled by one control device accesses a network device not supporting the IGP, thereby optimizing routing between multiple network devices controlled by the control device.

Abstract: The present application discloses a link state information advertisement method and device, including: receiving, by a first network device, network topology information sent by a control device, where the network topology information includes link state information, which is generated by the control device, between the first network device and a second network device, the first network device supports an IGP, and the second network device does not support the IGP; and advertising the link state information between the first network device and the second network device. The first network device advertises the link state information to other network devices supporting the IGP, therefore implementing that a network device supporting the IGP in multiple network devices controlled by one control device accesses a network device not supporting the IGP, thereby optimizing routing between multiple network devices controlled by the control device.

Abstract: A method for controlling the Grace Restart (GR) status is disclosed. The method includes: entering a GR status when a router detects that neighbor relationship with a neighbor router breaks and the router itself does not restart; receiving a neighbor relationship establishing message sent by the neighbor router; and quitting the GR status when the router detects that the message does not indicate a restart of the neighbor router. A router is also disclosed. The router includes a neighbor relationship testing module restart testing module, a relationship message receiving and processing module and a GR module. The solution is able to detect timely that a router mistakenly enters a Grace Restart status. Thus, unnecessary signaling and data interaction are reduced, and CPU resource is less occupied. In addition, a newly generated routing can be delivered to the LSP, which improves the rate of a success data transfer.

Abstract: A method for controlling the Grace Restart (GR) status is disclosed. The method includes: entering a GR status when a router detects that neighbor relationship with a neighbor router breaks and the router itself does not restart; receiving a neighbor relationship establishing message sent by the neighbor router; and quitting the GR status when the router detects that the message does not indicate a restart of the neighbor router. A router is also disclosed. The router includes a neighbor relationship testing module restart testing module, a relationship message receiving and processing module and a GR module. The solution is able to detect timely that a router mistakenly enters a Grace Restart status. Thus, unnecessary signaling and data interaction are reduced, and CPU resource is less occupied. In addition, a newly generated routing can be delivered to the LSP, which improves the rate of a success data transfer.