Campus prefixes are redistributed into OSPF and never appear on the cloud IOS XE router. The tunnel on that router is in a stub area. Area numbers match. Why are the prefixes missing?
Select an answer to reveal the explanation.
Short Explanation
You sent the campus prefixes as external news into a room that refuses external news. You take the tunnel out of the stub area so those prefixes can be accepted. Matching area numbers are required, and they are not what blocked the prefixes.
Full Explanation
A stub area blocks external LSAs. Redistributing the campus prefixes creates those external routes, and the cloud router never installs them while its tunnel sits in the stub. Make the area a normal area so the redistributed prefixes are allowed in. Matching area numbers are what let hellos agree. They do not block externals. The IKE lifetime does not delete LSAs. BGP weight is not in this OSPF decision and does not filter the external prefixes. Exam caveat: a totally stubby area also blocks inter-area summaries. If you only remove the stub flag and the prefixes are still summaries of the wrong type, check the area type again. Operational check: the tunnel interface should not be in a stub, and show ip route on the cloud router should list the campus prefixes.