Route oscillation occurred
Symptom
When all links function, route oscillation occurs on the RIP network. After displaying the routing table, you may find some routes intermittently appear and disappear in the routing table.
Analysis
In the RIP network, make sure that all the same timers within the entire network are identical and have logical relationships between them. For example, the timeout timer value must be greater than the update timer value.
Solution
Use the display rip command to verify the configuration of RIP timers.
Use the timers command to adjust timers properly.