PBB-TE分段保护的关键技术

Key Technology in PBB-TE Segment Protection

运营商骨干桥流量工程(PBB-TE)采用端到端的保护技术。随着PBB-TE网络规模的扩大,端到端的保护技术在流量切换效率、多点故障、点到多点路径等保护等方面存在不足,难以满足分组传送网的越来越精细的保护倒换要求。PBB-TE的分段保护技术由此应运而生。文章通过对PBB-TE分段保护技术及其数据业务切换、M:1关键技术的分析阐述,为提高长距离分组传送网可靠性问题提出了解决方案。

Provider backbone bridge-traffic engineering （PBB-TE） adopts an end-to-end protection mechanism. With PBB-TE network expansion, this mechanism is insufficient for traffic switching efficiency, multifailure protection, and point-to-multipoint connection, and it cannot satisfy the increased requirement for precision. We therefore propose PBB-TE segment protection technology. This paper analyses PBB-TE end-to-end technology, details the requirements of a long distance transit network, and introduces PBB-TE segment protection technology. It then presents a key technology of PBB-TE segment protection： traffic service switching and M：I segment protection. In conclusion, we put forward a solution for improving the reliability of long distance packet transport networks.