1 00:00:00,000 --> 00:00:10,000 My local PC has an IP address of 192.168.56.252 2 00:00:10,000 --> 00:00:14,000 and I’m running some free software called TFTP 32 3 00:00:14,000 --> 00:00:20,000 so on the router lets first see 4 00:00:20,000 --> 00:00:25,000 if I can ping the TFTP server, which I can 5 00:00:25,000 --> 00:00:27,000 It's important to check that you’ve got connectivity 6 00:00:27,000 --> 00:00:31,000 so now I'll type copy running-config ? 7 00:00:31,000 --> 00:00:34,000 and I have the option TFTP, so I'm gonna say tftp 8 00:00:34,000 --> 00:00:44,000 the IP address of the TFTP server is 192.168.56.252 9 00:00:44,000 --> 00:00:52,000 I'll accept the default file name of r1-config or config 10 00:00:52,000 --> 00:00:58,000 as you can see the file is being copied to the TFTP server 11 00:00:58,000 --> 00:01:01,000 and I can see that in the output on the router as well. 12 00:01:01,000 --> 00:01:07,000 So many bytes have been copied in so many seconds. 13 00:01:07,000 --> 00:01:14,000 In windows I'll open the file with word pad and as you can see here 14 00:01:14,000 --> 00:01:23,000 I have a configuration of my router. So let’s make a change. 15 00:01:23,000 --> 00:01:27,000 I'll set the line vty from 0 to 20 (line vty 0 20) 16 00:01:27,000 --> 00:01:34,000 specify login and specify a password of cisco 17 00:01:34,000 --> 00:01:41,000 that is different to this current config on the TFTP server 18 00:01:41,000 --> 00:01:44,000 I’ll copy the config to the TFTP server again. 19 00:01:44,000 --> 00:01:53,000 I’ll specify the same filename and let's open up the file 20 00:01:53,000 --> 00:02:00,000 and as you can see now, the changes have been made. 21 00:02:00,000 --> 00:02:06,000 So the file was successfully copied to the TFTP server. 22 00:02:06,000 --> 00:02:09,000 It's good practice once again to copy a config 23 00:02:09,000 --> 00:02:14,000 I could also copy the start up config to the TFTP server. 24 00:02:14,000 --> 00:02:22,000 Specify the IP address and let’s view the actual copy taking place. 25 00:02:22,000 --> 00:02:26,000 I’ll call this r1-start-config 26 00:02:26,000 --> 00:02:31,000 and that file has been copied to the TFTP server, 27 00:02:31,000 --> 00:02:37,000 we can also see that on the router and in windows. 28 00:02:37,000 --> 00:02:42,000 I can see the startup config. 29 00:02:42,000 --> 00:02:45,000 Now what’s important to note is 30 00:02:45,000 --> 00:02:52,000 the startup config is different to the running config, 31 00:02:52,000 --> 00:02:58,000 so notice the VTY lines are different on startup and running config. 32 00:02:58,000 --> 00:03:03,000 so once again if I look at the startup of the router 33 00:03:03,000 --> 00:03:09,000 I have login login as the commands with no passwords 34 00:03:09,000 --> 00:03:15,000 and to make the point I'll change the router's names to R1-run 35 00:03:15,000 --> 00:03:18,000 so sh start | i host 36 00:03:18,000 --> 00:03:22,000 shows me that the name of the router in the startup config is R1 37 00:03:22,000 --> 00:03:27,000 but the name of the file in running config is R1-run. 38 00:03:27,000 --> 00:03:37,000 so I can type copy, before I do that once again sh start | b vty 39 00:03:37,000 --> 00:03:42,000 that’s the config in the startup config but if I type copy tftp start 40 00:03:42,000 --> 00:03:47,000 this will overwrite the config in startup config. 41 00:03:47,000 --> 00:03:53,000 I’m gonna specify the running config not the startup config 42 00:03:53,000 --> 00:04:00,000 but I’m gonna over write the startup config with the running config stored on the TFTP server. 43 00:04:00,000 --> 00:04:03,000 So that’s completed. 44 00:04:03,000 --> 00:04:11,000 So if I type sh start | b vty which looked like this previously, notice its changed. 45 00:04:11,000 --> 00:04:17,000 So the startup config has been overwritten with the config on the TFTP server. 46 00:04:17,000 --> 00:04:22,000 Let’s try copying from TFTP to running config 47 00:04:22,000 --> 00:04:30,000 in this case I'll specify the startup config on the TFTP server 48 00:04:30,000 --> 00:04:35,000 but merge that with the running configuration. 49 00:04:35,000 --> 00:04:38,000 Notice as an example that the router name has changed. 50 00:04:38,000 --> 00:04:41,000 sh run | b vty 51 00:04:41,000 --> 00:04:48,000 Some config has remained because it’s done a merged. 52 00:04:48,000 --> 00:04:52,000 So as an example notice the passwords are still showing on the VTY lines 53 00:04:52,000 --> 00:04:56,000 where’s in this config file that we copied 54 00:04:56,000 --> 00:05:00,000 there were no passwords specified on the VTY lines. 55 00:05:00,000 --> 00:05:09,000 So a copy from TFTP to startup is an override of NVRAM 56 00:05:09,000 --> 00:05:12,000 or replacement of a saved configuration 57 00:05:12,000 --> 00:05:18,000 but a copy from TFTP to running config is a merge of the configuration. 58 00:05:18,000 --> 00:05:24,000 Now we could have done configure replace tftp 59 00:05:24,000 --> 00:05:32,000 but I need to specify the IP address of the TFTP server 60 00:05:32,000 --> 00:05:37,000 and the file name that I’m gonna use 61 00:05:37,000 --> 00:05:44,000 and that will now replace the running config 62 00:05:44,000 --> 00:05:48,000 and you can see as an example that commands have been rolled back. 63 00:05:48,000 --> 00:05:51,000 So now if you type sh run | b vty 64 00:05:51,000 --> 00:05:57,000 notice the password have been removed from the running config. 65 00:05:57,000 --> 00:06:01,000 So in summary copy run to start is an override 66 00:06:01,000 --> 00:06:04,000 a startup config with running config 67 00:06:04,000 --> 00:06:10,000 a copy from startup config to running config is a merge not an override 68 00:06:10,000 --> 00:06:14,000 When you configure through the terminal by using configure terminal 69 00:06:14,000 --> 00:06:20,000 that’s a merge of configurations, copy TFTP to run is a merge 70 00:06:20,000 --> 00:06:25,000 you can backup your configs and you should to TFTP servers. 71 00:06:25,000 --> 00:06:29,000 So copy run to tftp or copy start to tftp. 72 00:06:29,000 --> 00:06:33,000 erase start erases the startup-config 73 00:06:33,000 --> 00:06:38,000 so essentially removes it and the router is set back to defaults. 74 00:06:38,000 --> 00:06:40,000 So we'll do that as a last test 75 00:06:40,000 --> 00:06:47,000 erase startup-config hit enter to confirm. 76 00:06:47,000 --> 00:06:50,000 startup config has been erased 77 00:06:50,000 --> 00:06:55,000 I’m gonna reload and not save the configuration 78 00:06:55,000 --> 00:07:01,000 and what will happen now is the router will reboot with no configuration 79 00:07:01,000 --> 00:07:04,000 If you’re not interested in seeing this skip ahead 80 00:07:04,000 --> 00:07:07,000 but otherwise I'm gonna show you the boot process on this router 81 00:07:07,000 --> 00:07:10,000 and show you that it's starts up again 82 00:07:10,000 --> 00:07:14,000 asking us to complete the initial configuration dialogue. 83 00:07:14,000 --> 00:07:18,000 You can see once again that this is a 1841 router 84 00:07:18,000 --> 00:07:22,000 it's decompressing the image at the moment. 85 00:07:22,000 --> 00:07:30,000 We can see the system bootstrap version which is different to the main IOS 86 00:07:30,000 --> 00:07:35,000 It's now booting the IOS, which is this version of software. 87 00:07:35,000 --> 00:07:45,000 We can see router platform, amount of memory, interfaces in the router 88 00:07:45,000 --> 00:07:51,000 amount of NVRAM, size of flashcard and once again size of RAM 89 00:07:51,000 --> 00:07:56,000 so running config is stored in RAM, startup config is stored in NVRAM 90 00:07:56,000 --> 00:08:03,000 and the IOS image is stored on flash and then loaded into memory 91 00:08:03,000 --> 00:08:05,000 when the router is booted 92 00:08:05,000 --> 00:08:08,000 It's sending a broadcast into the network 93 00:08:08,000 --> 00:08:16,000 to try and get a network config file, it then tries to get a cisconet.cfg file. 94 00:08:16,000 --> 00:08:20,000 We're asked if we want to enter the initial configuration dialogue. 95 00:08:20,000 --> 00:08:26,000 I've hit no, so we are now at the CLI prompt on the router. 96 00:08:26,000 --> 00:08:32,000 sh start shows me that I have no startup config. 97 00:08:32,000 --> 00:08:37,000 sh run shows me the default configuration on this router.