Comprehensive and Detailed In-Depth Explanation:
* MPLS packet forwarding is based on label information stored in the LFIB (Label Forwarding Information Base).
* The role of different tables in MPLS:# RIB (Routing Information Base): Stores routing information, but does not handle MPLS label forwarding.# LIB (Label Information Base): Stores label bindings but is used for control-plane operations.# FIB (Forwarding Information Base): Used for IP forwarding, not MPLS forwarding.# LFIB (Label Forwarding Information Base): The correct table, which maps incoming labels to outgoing labels (or actions like swap, push, pop) and is used for actual MPLS packet forwarding.
# Reference: HCIP-Datacom Advanced Routing & Switching Technology - MPLS LFIB and Label Forwarding