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What solution allows the network switch to automatically recover from such an issue?

While working in the core network building, a technician accidently bumps the fiber connection
between two core switches and damages one of the pairs of fiber. As designed, the link was
placed into a non-forwarding state due to a fault with UDLD. After the damaged cable was
replaced, the link did not recover. What solution allows the network switch to automatically recover
from such an issue?