【正文】
py running startup copy startup running (合并 ) config term (合并 ) 169。 1999, Cisco Systems, Inc. ICND— 532 Cisco IOS File Systems and Devices RAM NVRAM TFTP server Flash flash: system: nvram: tftp: 169。 1999, Cisco Systems, Inc. ICND— 536 備份 IOS的準備工作 ? Check access to the server ? Check space available on the server ? Check file naming convention Router Network server 169。 1999, Cisco Systems, Inc. ICND— 540 wg_ro_acopy tftp flash Address or name of remote host []? Source filename []? Destination filename []? Accessing Erase flash: before copying? [confirm] Erasing the flash filesystem will remove all files! Continue? [confirm] Erasing device... eeeee (output omitted) ...erased Erase of flash: plete Loading from (via Ether0): !!!!!!!!!!!!!!!!!!!! (output omitted) [OK 10084696/20238704 bytes] Verifying checksum... OK (0x9AA0) 10084696 bytes copied in secs (32636 bytes/sec) wg_ro_a 升級 IOS ? Erase Flash occurs before loading new image ? Note message that image already exists Network server FLASH 169。 1999, Cisco Systems, Inc. ICND— 538 wg_ro_ashow flash System flash directory: File Length Name/status 1 10084696 [10084760 bytes used, 6692456 available, 16777216 total] 16384K bytes of processor board System flash (Read ONLY) 驗證 Flash容量及文件名 Verify Flash memory has room for the IOS image 169。 1999, Cisco Systems, Inc. ICND— 534 備份 IOS的準備工作 ? Check access to the server Router Network server 169。 1999, Cisco Systems, Inc. ICND— 530 修改配置 Config Config Console RAM NVRAM ? NVRAM ? Terminal ? TFTP server ? Erase Start copy running startup copy startup running (合并 ) TFTP server Blank 000000 000000 erase start config term (合并 ) copy tftp run (合并 ) copy tftp start copy start tftp copy run tftp 169。 1999, Cisco Systems, Inc. ICND— 526 show running and show startup Commands wg_ro_cshow startupconfig Using 1359 out of 32762 bytes ! version ! More wg_ro_cshow runningconfig Building configuration... Current configuration: ! version ! More In NVRAM In RAM Display current and saved configuration 169。 1999, Cisco Systems, Inc. ICND— 522 ? Configuration register bits 3, 2, 1, and 0 set boot option ? Check configuration register value with show version 配置寄存器的值 Configuration Register Boot Field Value 0x0 0x2 to 0xF 0x1 Meaning Use ROM monitor mode (Manually boot using the b mand) Examine NVRAM for boot system mands (0x2 default if router has Flash) Automatically boot from ROM