HI,
Our Nexus Switches encountered some problems when converging the OSPF protocol.
We have two N5600s as upstream devices, and multiple N9Ks connected downstream. OSPF protocol is established between them. The topology is in the attachment
192.168.x.x and 192.168.y.y are test networks. N9K reaches the test network through static routes, and the static routes are redistributed to the OSPF process on N9K.
Problem: When we power off multiple devices at the same time (for example, Device1, 3, 5, 7), we sometimes see that N5K devices have slower convergence on N5K. It takes more time than other devices (other devices take up to 1 second, and when a problem occurs, the device convergence takes up to 6 seconds). Through the debug ip ospf event (debug information is in the attachment), after some devices are powered off, the N5K will specify the next hop to the test network as its own interface address (note: this interface is currently down), which led to N5K needs to converge again to complete the final route calculation. I find this very strange. What is the reason?
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Rps-Cheers | If it solves your problem, please mark as answer. Thanks !
