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MPLS and Carrier Ethernet: Mayhem in the metro

机译:MPLS和运营商以太网:城域混乱

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摘要

For the last few years, the common wisdom for telcos beefing up their metro networks was to deploy MPLS. Between its aggregation transport credentials and ability to handle complex portfolios of emerging broadband services - and the fact that MPLS now pretty much dominates core networks anyway-there was little reason to think otherwise. But MPLS in the metro seemed somewhat less of a fait accompli last year as interest grew in Carrier Ethernet, which promised a simplified, elegant and cheaper metro alternative to complex, clumsy, costly MPLS. Specifically, buzz has centered around provider backbone transport (PBT) and the IEEE's version, provider backbone bridging - traffic engineering (PBB-TE), which uses point-to-point tunneling technology that adds Sonet/SDH-like determinism to Ethernet. PBB lets service providers define PBT tunnels and run Ethernet or other traffic.
机译:在过去的几年中,电信公司加强其城域网的常识是部署MPLS。在其聚合传输凭证和处理新兴宽带服务的复杂产品组合的能力之间,以及MPLS现在无论如何仍在核心网络中占据主导地位的事实,几乎没有理由反驳。但是,随着对运营商以太网的兴趣增加,去年城域中的MPLS似乎不再是一成不变的事情,它承诺提供一种简化,优雅,便宜的城域替代方案,以替代复杂,笨拙,昂贵的MPLS。具体来说,嗡嗡声主要集中在提供商骨干网传输(PBT)和IEEE版本的提供商骨干网桥接-流量工程(PBB-TE)上,它使用点对点隧道技术,将类似于Sonet / SDH的确定性添加到以太网中。 PBB使服务提供商可以定义PBT隧道并运行以太网或其他流量。

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