(红头发CCNA视频配套PPT)第6章管理Cisco设备.ppt

0x2142 NVRAM startup-config Slide 1 of 1 Purpose: Emphasize: Note: There is a detail flowchart of the router startup process on the next slide. Slide 1 of 1 Purpose: Emphasize: Note: The 2500 series routers do not operate this way. The 2500 series routers normally run IOS from flash. The IOS in flash is not compressed but it is relocatable. Relocatable means the IOS image can be ran from flash or from RAM. The 2500 can run from RAM if you use the “boot system tftp” command to boot the IOS image. The Rxboot mode is also ran from RAM on the 2500 routers. Slide 1 of 1 Purpose: Emphasize: Note: The current state of the flash memory is in Read ONLY mode. It is running IOS from flash. This router has a total of 16MB of flash memory. The flash contains one IOS image and there are 6.69MB available space left in flash. Slide 1 of 1 Purpose: Emphasize: Using the default config register value (0x2102), the router will load the config from NVRAM at startup. Slide 1 of 1 Purpose: This slide is a repeated slide from chapter 4. Emphasize: ? 1999, Cisco Systems, Inc. ICND—5-* ? 1999, Cisco Systems, Inc. 5-* 第六章管理Cisco设备 CDP运行在使用10.3或更新版Cisco IOS的路由器以及Cisco 交换机和集线器上 能获取的信息包括: 设备名 对应各协议的地址 端口名 角色特征 平台 CDP show cdp CDP CDP 用CDP发现直接相邻的设备 使用 CDP 交换机B 路由器A 路由器B 交换机A S0 S1 RouterA#sh cdp ? entry Information for specific neighbor entry interface CDP interface status and configuration neighbors CDP neighbor entries traffic CDP statistics cr RouterA(config)#no cdp run RouterA(config)#interface serial0 RouterA(config-if)#no cdp enable 交换机A同时也显示其Mac地址 使用show cdp neighbor 命令 RouterA#sh cdp neighbors Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge S - Switch, H - Host, I - IGMP, r - Repeater Device ID Local Intrfce Holdtme Capability Platform Port ID RouterB Ser 0 148 R 2522 Ser 1 SwitchA0050BD