November 2006
Beginner
672 pages
15h 30m
English
Content preview from MPLS Fundamentals
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LDP Overview
To get packets across a label switched path (LSP) through the MPLS network, all LSRs must run a label distribution protocol and exchange label bindings. When all the LSRs have the labels for a particular Forwarding Equivalence Class (FEC), the packets can be forwarded on the LSP by means of label switching the packets at each LSR. The label operation (swap, push, pop) is known to each LSR by looking into the LFIB. The LFIB—which is the table that forwards labeled packets—is fed by the label bindings found in the LIB. The LIB is fed by the label bindings received by LDP, Resource Reservation Protocol (RSVP), MP-BGP, or statically assigned label bindings. Because RSVP distributes the labels only for MPLS traffic engineering and MP-BGP ...
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