| 摘要 |
Techniques are described for providing QoS guarantees when coupling layer two (L2) networks via an intermediate Multi-protocol Label Switching (MPLS) network. A network device, such as a router, receives a request to transport data from an L2 connection. The request specifies one of more characteristics of the L2 connection, such as bandwidth, color, end-to-end delay, jitter, a security requirement, or a classification of traffic for the L2 connection. The network device selects a label switched path (LSP) through the MPLS network based on the characteristics of the L2 connection, and forwards the data from the L2 connection via the selected LSP. In this manner, an LSP and, in particular, one or more forwarding next hops for the LSP, is selected that provides a "virtual" L2 connection, or pseudo-wire, that more closely emulates a direct L2 connection between the L2 networks.
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