Method and router for detecting error smoothness rebooting status
A graceful restart, router technology, applied in the field of graceful restart, can solve the problems of occupying CPU resources, data forwarding failure, unavailability of routes, etc., to achieve the effect of improving the success rate, reducing signaling, and reducing the duration
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example 1
[0089] Example 1. This example shows the GR process when the switch has a link failure but the router has not restarted.
[0090] Such as Figure 5As shown, router RTA and router RTB are connected through switches S1 and S2. When the link between S1 and S2 fails, both RTB and RTA will find that the neighbor relationship with the peer router is broken, and both RTB and RTA will consider themselves The helper end that is the opposite end will enter the GR state, maintain the neighbor relationship with the opposite end, and mark the LSP of the opposite end saved by itself, and continuously send neighbor relationship establishment messages to the opposite end. The reserved bit of whether a restart occurs at the end is set to 0 to indicate that the end does not restart.
[0091] When the link between S1 and S2 recovers, both RTB and RTA will receive a neighbor relationship establishment message from the opposite end indicating that the opposite end has not restarted, and then RTB ...
example 2
[0092] Example 2. This example shows the GR process when the router restarts.
[0093] Such as Figure 6 As shown, the router RTA and the router RTB are connected through a switch S. When RTB fails, RTA will find that the neighbor relationship with RTB is broken, then it will consider itself as a Helper end, enter the GR state, and mark the LSP of RTB saved by itself, and at the same time continuously send to RTB to indicate that it has not occurred The neighbor relationship establishment message of the restart information.
[0094] After RTB restarts, send to RTA the neighbor relationship establishment message that carries the information that indicates that self-restart occurs, after RTA receives this message, knows that RTB restarts, then sends the marked LSP to RTB, at this time, Both RTA and RTB are in GR state.
[0095] It should be understood that the software for implementing the method of the present invention can be stored in a computer-readable storage medium, an...
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