A L3VPN customer is connected to one of your PE routers by using OSPF as CE-PE protocol and
was successfully exchanging VPN routes. It came to your attention that OSPF adjacency became
stuck in “EXCHANGE” state recently. What is the most likely cause for this issue?
A.
A corrupted OSPF LSA was originated by the CE.
B.
The OSPF cost metric is changed on the CE after the first bring up.
C.
The CE-PE link is severely degraded after the first bring up.
D.
The MTU setting is changed on the CE after the first bring up.
E.
The CE-PE link is congested with traffic.