CCNA英文版09.ppt

? 2002, Cisco Systems, Inc. All rights reserved. ? 2002, Cisco Systems, Inc. All rights reserved. ICND — 2-2 ? 2002, Cisco Systems, Inc. All rights reserved. 2 Managing Cisco IOS Devices ? 2002, Cisco Systems, Inc. All rights reserved. ICND — 2-3 Objectives pleting this lesson, you will be able to: ? Manage IOS image files to maintain accessible IOS images according to best practices, given operational access layer switches, routers, and a TFTP server ? Manage device configuration files to reduce device downtime according to best practices, given operational access layer switches, routers, and a TFTP server ? Execute an add, move, or change on a router, given a new network requirement ? Handle the troubleshooting process to minimize any potentially adverse impact on Cisco devices ? 2002, Cisco Systems, Inc. All rights reserved. ICND — 2-4 Cisco IOS File System and Devices ? 2002, Cisco Systems, Inc. All rights reserved. ICND — 2-5 Managing Cisco IOS Images ? 2002, Cisco Systems, Inc. All rights reserved. ICND — 2-6 wg_ro_a# show flash System flash directory: File Length Name/status 1 10084696 c2500-js-l_120- [10084760 bytes used, 6692456 available, 16777216 total] 16384K bytes of processor board System flash (Read ONLY) ? Verify that flash memory has room for the Cisco IOS image. Verifying Memory and Deciphering Image Filenames ? 2002, Cisco Systems, Inc. All rights reserved. ICND — 2-7 ? Back up current files prior to updating flash memory. Creating a Software Image Backup ? 2002, Cisco Systems, Inc. All rights reserved. ICND — 2-8 Upgrading the Image from the Network ? 2002, Cisco Systems, Inc. All rights reserved. ICND — 2-9 Device Configuration Files ? 2002, Cisco Systems, Inc. All rights reserved. ICND — 2- 10 Cisco IOS mand ? NVRAM ? Terminal ? TFTP server ? Erase start