A Designated Router Election Method, Device, Router and Communication System
A technology of routers and communication networks, applied in the field of communication, can solve problems such as frequent switching of DIS
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
no. 1 example
[0025] figure 1 It is a schematic diagram of the structure of the designated router election device provided by the first embodiment of the present invention, which is represented by figure 1 It can be seen that the designated router election device provided in this embodiment includes:
[0026] The detection module 11 is used to detect whether there is a designated router in the communication network when newly joining the communication network;
[0027] The election module 12 is configured to accept the designated router to complete the election of the designated router if there is a designated router; if there is no designated router, trigger the election of the designated router.
[0028] When a router newly joins the communication network, DIS election needs to be carried out. In this embodiment, the router performs different elections according to whether there is a DIS in the communication network; if there is a designated router, then accept the designated router to c...
no. 2 example
[0050] figure 2 The flow chart of the designated router election method provided by the second embodiment of the present invention is represented by figure 2 It can be seen that the designated router election method provided in this embodiment includes:
[0051] S201: When newly joining the communication network, detect whether there is a designated router in the communication network;
[0052] S202: If there is a designated router, accept the designated router to complete the election of the designated router; if there is no designated router, trigger the election of the designated router.
[0053] In some embodiments, the method in the above embodiment also includes:
[0054] After joining the communication network, monitor the trigger conditions that appear, and the trigger conditions are used to trigger the election of the designated router;
[0055] After monitoring the trigger condition, determine whether it is a designated router;
[0056] If the judgment result i...
no. 3 example
[0071] The present invention will be further explained in combination with specific application scenarios.
[0072] The ISIS protocol adopts a preemptive rule. When a newly joined router has a better election qualification than the current designated router, the newly joined router will immediately preempt the qualification of the current designated router and elect itself as the designated router (other routers will also elect the newly joined router as the designated router. ), this preemptive DIS election algorithm will cause frequent DIS switching, which may cause problems such as routing flapping.
[0073] image 3 It shows the existing ISIS preemptive DIS election process. At T1, ROUTER 1 and ROUTER 2 establish a neighbor relationship. The port priorities of ROUTER 1 and ROUTER 2 are 1 and 2 respectively. ROUTER 2 is elected as DIS and generates a pseudo-node corresponding to the network. Link state message; ROUTER 3 joins the network at time T2, and the port priority o...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More