摘要
CrankBack是指在建立LSP的过程中如果遇到资源阻塞,或者节点失效时,由资源阻塞的节点向修复节点发起的重新寻找新路由的信令机制。由于LSR所广播的资源信息可能是过期的,因此资源的不足会经常发生并导致LSP建立的不成功,这时CrankBack(回选)路由是非常有用的。采用RSVP-TE信令技术可以实现CrankBack功能。
CrankBack is an signaling mechanism which ask the ingress node of network to initialize an new LSP establishment request when an being established LSP face with resource blocking or failure. Since the resource advertised by LSR may be out of date, so resource blocking and failure mac frequently happen when establishing a LSP. CrankBack will very useful to held LSP establishment. RSVP-TE signaling mechanism can be used to perform CrankBack function
出处
《信息通信》
2007年第2期38-40,共3页
Information & Communications
