L
label

In MPLS, 20-bit unsigned integer in the range 0 through 1,048,575 used to identify a packet traveling along an LSP.

label-switched path (LSP)

Sequence of routers that cooperatively perform MPLS operations for a packet stream. The first router in an LSP is called the ingress router, and the last router in the path is called the egress router. An LSP is a point-to-point, half-duplex connection from the ingress router to the egress router. (The ingress and egress routers cannot be the same router.)

label switching
See [MPLS]
label-switching router
See [LSR]
link

Communication path between two neighbors. A link is up when communication is possible between the two end points.

link-state PDU (LSP)

Packets that contain information about the ...

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