Refer to the exhibit. R1 is connected with R2 via GigabitEthernet0/0, and R2 cannot ping R1.
What action will fix the issue?
Refer to the exhibit. R1 is connected with R2 via GigabitEthernet0/0, and R2 cannot ping R1.
What action will fix the issue?
The issue appears to be related to interface flapping, as indicated by the multiple state transitions for GigabitEthernet0/0. IP Event Dampening is a feature that suppresses the negative impact of excessive interface flapping by temporarily removing the unstable interface from the network until it stabilizes. This will help in resolving the connectivity issue between R1 and R2.
For those like me who don't what is IP Event Dampening : The IP Event Dampening feature introduces a configurable exponential decay mechanism to suppress the effects of excessive interface flapping events on routing protocols and routing tables in the network. This feature allows the network operator to configure a router to automatically identify and selectively dampen a local interface that is flapping. Dampening an interface removes the interface from the network until the interface stops flapping and becomes stable. Configuring the IP Event Dampening feature improves convergence times and stability throughout the network by isolating failures so that disturbances are not propagated. This, in turn, reduces the utilization of system processing resources by other devices in the network and improves overall network stability. https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_pi/configuration/xe-16-11/iri-xe-16-11-book/iri-pi-event-damp.html
Would you please explain more, how can this feature fix the issue? Isn't the real issue that needs fixing is the flapping port itself?
Why cisco create this type of questions, i read completely the Enarsi book from cisco press and this is not writed in that book.
sale for me , never heard about it before , its not even in the enarsi book
The given answer is correct
The given answer is correct
Interface state changes occur when interfaces are administratively brought up or down or if an interface changes state. Every interface state change requires all affected devices in the network to recalculate best paths, install or remove routes from the routing tables, and then advertise valid routes to peer routers. An unstable interface that flaps excessively can cause other devices in the network to consume substantial amounts of resources for recalculations. The IP Event Dampening feature introduces a configurable mechanism to suppress the effects of excessive interface flapping events on routing protocols and routing tables in the network.
C is correct