Hãy nhớ rằng khi tôi đã giới thiệu cho các bạn làm thế nào để tìm một chút subnet với một mặt nạ loại C? Bạn hình dung theo cách này giống. (Bây giờ bạn biết lý do tại sao tôi đã giới thiệu cho các bạn subnet mask 1-bit trong phần để loại C làm cho phần này dễ dàng | Perform an Initial Configuration on a Router 179 You can view the description of an interface either with the show running-config command or the show interface command. Atlanta sh run cut interface Ethernet0 description Sales Lan ip address no ip directed-broadcast interface Serial0 description Wan to Miami circuit 6fdda4321 no ip address no ip directed-broadcast no ip mroute-cache Atlanta sh int e0 Ethernet0 is up line protocol is up Hardware is Lance address is bia Description Sales Lan output cut Atlanta sh int s0 Serial0 is up line protocol is up Hardware is HD64570 Description Wan to Miami circuit 6fdda4321 output cut Atlanta Viewing and Saving Configurations If you run through setup mode you ll be asked if you want to use the configuration you just created. If you say Yes it will copy the configuration running in DRAM known as the running-config into NVRAM and name the file startup-config. You can manually save the file from DRAM to NVRAM by using the copy runningconfig startup-config command. You can use the shortcut copy run start also Atlanta copy run start Destination filename startup-config Enter Warning Attempting to overwrite an NVRAM configuration previously written by a different version of the system image. 180 Chapter 2 Implementation Operation Overwrite the previous NVRAM configuration confirm Enter Building configuration. Notice that the message you received here tells you you re trying to write over the older startup-config. The IOS had been just upgraded to version and the last time the file was saved was running. When you see a question with an answer in it means that if you just press Enter you re choosing the default answer. Also when the command asked for the destination filename the default answer was startup-config. The feature aspect of this command output is that you can t even type anything else in or you ll get an error Atlanta copy run start Destination filename .
