Extreme Networks BlackDiamond 6800 MPLS Installation And User Manual page 43

Table 3-1: MPLS Terms and Acronyms (continued)
Term or Acronym
DU
FEC
Label
Label stack
Label swapping
LDP
LER
LSP
LSR
MPLS
NHLFE
PHP
RSVP
RSVP-TE
Shim header
SP
TE
TLS
MPLS Module Installation and User Guide
Description
Downstream Unsolicited. Distribution of labels downstream without an
explicit label request.
Forward Equivalence Class. A group of packets that are forwarded in
the same manner (for example, over the same Label Switched Path).
A short, fixed-length identifier used to forward packets from a given
link.
A set of one or more MPLS labels used by MPLS to forward packets
to the appropriate destination.
Lookup and replacement of an incoming label with the appropriate
outgoing label.
Label Distribution Protocol. A protocol defined by the IETF used to
establish an MPLS Label Switched Path (LSP).
Label Edge Router. A Label Switch Router that is at the beginning
(ingress) or end (egress) of a Label Switched Path.
Label Switched Path. The unidirectional MPLS connection between
two routers over which packets are sent.
Label Switch Router. A router that receives and transmits packets on
an MPLS network.
MultiProtocol Label Switching. A set of protocols defined by the IETF
used to transmit information based on a label-switching forwarding
algorithm.
Next Hop Label Forwarding Entry. The NHLFE represents the MPLS
router next hop along the LSP.
Penultimate Hop Popping. A label stack optimization used for
conserving the number of allocated labels.
Resource ReSerVation Protocol. A resource setup protocol designed
for an integrated services network.
The combination of RSVP and MPLS label signaling to provide traffic
engineered LSPs as specified in draft-ietf-mpls-rsvp-lsp-tunnel-09.txt.
MPLS-specific header information that is inserted between layer-2
and layer-3 information in the data packet.
Service Provider. An entity that provides network services for
individuals or organizations.
Traffic Engineering. The provisioning of an autonomous flow along a
specified network path.
Transparent LAN Services. A method for providing layer-2 virtual
private networks (VPNs).
Overview of MPLS
3-3