Configuration guidelines
Do not use static route FRR and BFD (for a static route) at the same time.
Static route does not take effect when the backup output interface is unavailable.
Equal-cost routes do not support static route FRR.
The backup output interface and next hop must be different from the primary output interface and next hop.
To change the backup output interface or next hop, you must first remove the current setting.
Static route FRR is available only when the state of primary link (with Layer 3 interfaces staying up) changes from bidirectional to unidirectional or down.