公开(公告)号：US07061858B1

公开(公告)日：2006-06-13

申请号：US09714246

申请日：2000-11-16

申请人： Marco Di Benedetto ,  Mrinal Baruah ,  Chengelpet Veeravalli Ramesh ,  Alagu Annaamalai ,  Ramana Mellacheruvu ,  Sridhar K. Aswathnarayan ,  Hei Tao Fung ,  Umesh Mahajan

发明人： Marco Di Benedetto ,  Mrinal Baruah ,  Chengelpet Veeravalli Ramesh ,  Alagu Annaamalai ,  Ramana Mellacheruvu ,  Sridhar K. Aswathnarayan ,  Hei Tao Fung ,  Umesh Mahajan

IPC分类号： G01R31/08

CPC分类号： H04L45/00 ,  H04L41/00 ,  H04L45/48 ,  H04L45/586

摘要： A method and apparatus allows for continued operation of one or more applications running at a network device with reduced delay despite crashes or failures at that device. The network device includes two or more supervisor cards for running the applications and a plurality of line cards. According to the invention, one supervisor card is designated the active supervisor card and one supervisor card is designated the standby supervisor card. As changes in state and other operating conditions take place on the active supervisor events are generating for passing at least some of this information to the standby supervisor where it is stored. Following a crash or failure of the active supervisor card, the standby becomes the newly active supervisor card. The standby supervisor performs a consistency check with the line cards and resets those that fail the check. The standby supervisor also determines which data records and state information stored at the standby supervisor are valid, and begins running the applications loaded onto the device. Those data records and state information determined by the standby supervisor to be valid are utilized by the applications in continuing their operation, while invalid data records and state information are discarded.

摘要翻译： 一种方法和装置允许在网络设备上运行的一个或多个应用继续运行，尽管在该设备上发生故障或故障，但延迟延迟。 网络设备包括用于运行应用的两个或更多个管理卡和多个线卡。 根据本发明，一个管理卡被指定为主动管理卡，一个管理卡被指定为备用主管卡。 由于状态和其他操作条件的改变发生在活动主管上，所产生的事件将至少部分信息传送到备用主管，在该主管处存储。 在活动主管卡出现故障或故障后，备用电源将成为新建的主管卡。 备用主管使用线路卡进行一致性检查，并重新设置检查失败的那些。 备用主管还确定在备用主管上存储的哪些数据记录和状态信息有效，并开始运行加载到设备上的应用程序。 被备用主管确定为有效的那些数据记录和状态信息被应用程序用于继续操作，而无效数据记录和状态信息被丢弃。