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Metro Ethernet by Sam Halabi

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L
L2TPv3.

An L2 tunneling protocol that allows the tunneling of Ethernet packets over an L3 IP network.

label block.

A block of MPLS labels exchanged between two MPLS routers.

Label Distribution Protocol (LDP).

A standard protocol between MPLS-enabled routers to negotiate the labels (addresses) used to forward packets. The Cisco proprietary version of this protocol is the Tag Distribution Protocol (TDP).

label switch router (LSR).

Forwards packets in an MPLS network by looking only at the fixed-length label.

label switched path (LSP).

A path that MPLS packets traverse between two edge LSRs.

lambda-switch capable (LSC) interfaces.

Interfaces that can forward data based on the wavelength on which it was received. This is typical of optical cross-connects ...

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