摘要
随着网络规模的不断扩大,网络速度的快速提升,网络与通信的新技术不断融入,用户越来越需要更丰富、更方便、更及时的网络应用和服务,互联网的这些特征导致新一代互联网概念的产生。为了提高网络可用性,IETF提出了对路由协议的扩展来减少由于路由协议失效造成的业务损失。在网络边缘路由器和其邻居路由器都支持OSPF平稳重启情况下,即使控制平面失效,数据平面也能够继续处理和转发报文。由于减少了路由抖动,平稳重启能够增加网络稳定性并减少控制平面资源的消耗。从而不单单增强了单台路由器的可用性,更提高了整个网络的可用性。
With the increasing enlargement of network scale, the rapid increment of network speed, and the emergence of new technology of network and communication, people need more abundant, more convenient and more rapid network application and service. Because of these characters of Intemet, the conception called ＂lntemet of new generation＂ has appeared. To help meet the goals of high availabilit y, the Intemet Engineering Task Force has built extensions to routing protocols such as BGP, OSPF, LDP that minimize the outage associated with a failed routing protocol. With OSPF Graceful Restart enabled on an edge device and its peer, the data plane can continue to process and forwarding packets even if the control plane fails. By also reducing routing flap, Graceful Restart stabilizes the network and reduces the consumption of control plane resources. Graceful Restart offers high availability for the network, which goes beyond high availability only for an individual router.
出处
《仪器仪表用户》
2007年第6期21-22,共2页
Instrumentation
