FIB
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... source address is looked up in the Forwarding Information Base (FIB)
- and if the packet is received on the interface which would be used
...
... 2]. That way, the route will always be the
best one in the FIB, even in the scenarios where only the primary
connectivity would be used and typically no packets would pass
...
... of Strict RPF. The source address is still looked up in the FIB (or
an equivalent, RPF-specific table) but instead of just inserting one
...