INCIDENT #066 · OSPF
The advertised network misses the actual loopback
Hard25 minutesPro lab
The incident
The secondary application subnet is connected on R3 and all transit neighbors are healthy, but the subnet is not learned on R1. Check whether the routing statement actually matches an interface.
Your objective
Restore the documented flows for 10.146.31.0/24, including the return path to the affected client. Preserve the other service branch, all transit links, and SSH isolation. Do not change interface addresses or the physical topology.
The network
Physical links · Service health not shown
Link addressing (3)
- R1 R2
10.146.12.0/30 - R2 R3
10.146.23.0/30 - R2 R4
10.146.24.0/30
4 devices · Cisco IOS syntax · Simulated network
What you’ll practice
Interview exercises are inspired by common industry competencies. They are not proprietary interview questions.