Router. Geek » How to Upgrade IOS on a Cisco Router. When would you need this: The upgrade is required when you plan to add more duties to the router or new hardware. The installation is required when the IOS image you have on the router is corrupted. Special Requirements: The router’s flash size should be enough for the new IOS image. Before starting the procedure of IOS upgrade or installation, you will need to install TFTP server software on a PC connected to the router Ethernet interface. There are many free downloadable TFTP servers’ software on the Internet, however, our recommendation is Free TFTP Server 6. Afterwards, you make sure to direct the TFTP server to the folder containing the new IOS image that you have. We will put down two procedures for two different type of routers; a procedure for routers having Internal Flash (ex: 2. PCMCIA flash cards (ex: 3. Upgrade Procedure for Cisco Routers with Internal Flash: 1. 7613 Router: Access product specifications, documents, downloads, Visio stencils, product images, and community content.Create a console connection with the default settings (9. Verify the connectivity between the router and the TFTP server using ‘ping’. Make sure that the router interface and the TFTP server IP addresses are in the same range and the ping is responding well. Although the upgrade will be happening in the flash and the configuration is saved in the NVRAM, make a backup of the configuration. This is recommended in case something goes wrong in the upgrade. As an anti-security feature for a demo-locked image, the Cisco IOS XRv Router provides hard-coded username-password combinations (see table below) that can be used to. Also, make a backup copy of the IOS you already have on the router. In case the new IOS image is corrupted, you will be on the safe side. For the backup process, please refer to the IOS backup procedure and configuration backup procedure. Start the upgrade by the command: Router#copy tftp flash. Now you will be prompted for the IP address of the TFTP server: Address or name of remote host []? XXX. XXX. XXX. XXXAfterwards, you will be asked for the name of the new IOS file being copied from the TFTP server: Source filename []? XXXX- X- XX. XXX- XX. Please note that the file name is case sensitive, so be %1. Now you will be asked for the destination file name on your router,Destination filename []? XXXX- X- XX. XXX- XX. It is preferred to keep it as the source file name, to be able to easily identify the files on the TFTP servers as compared to the ones on the routers. Now you will be asked whether to erase the existing file(s) in the flash or not. If you have enough free space on the flash, don’t erase the old IOS image, you might need it. Erase flash: before copying? Afterwards, the router starts copying the new IOS file to the router, or start erasing the flash and then copying. Erasing the flash filesystem will remove all files! Continue? [confirm]y. Erasing device… eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee …erased. Erase of flash: complete. Loading c. XXXX- X- XX. XXX- XX. bin from XXX. XXX. XXX. XXX (via Ethernet. OK – xxxxx/yyyyyyy bytes]Verifying checksum… OK (0x. AC8. A)xxxxxx bytes copied in xx. The copying process takes several minutes; the time differs from network to network. During the copy process, messages are displayed to indicate which file has been accessed. The exclamation point “!” indicates that the copy process is taking place. Each exclamation point indicates that ten packets have been transferred successfully. A checksum verification of the image occurs after the image is written to flash memory. Before reloading the router, you need to make sure of two things. The first is that the configuration register value is 0x. You can check that wit the ‘show version’ command. If the configuration register’s value is not 0x. Router(config)#config- register 0x. The second thing is needed to be checked if you did not erase the contents of the flash. You will need to setup the router to boot from the new IOS file with the following commands: Router(config)#no boot system. Router(config)#boot system flash c. XXXX- X- XX. XXX- XX. If you type the reload command, the router asks you if you want to save the configuration. You should be very cautious here. The reason is that if the router is in boot mode for instance, it is a subset of the full Cisco IOS software which is running and there is no routing functionality. Therefore, all the routing configuration is gone in the running configuration and if you save the configuration at this time, then you erase the good startup- configuration in NVRAM and replace it by the incomplete running- configuration. Save the configuration only if you are sure that you have the full configuration in the output of show run. It is NOT necessary to save the configuration to take into account the new config- register if this one has been changed previously. That is done automatically. Router#reload. System configuration has been modified. Save? [yes/no]: y Building configuration…[OK]Proceed with reload? To verify that the new image is loaded after the ‘reload’, use ‘show version’ command. SYS- 5- CONFIG_I: Configured from console by console. Cisco Internetwork Operating System Software IOS ™ CXXXX Software (CXXXX- X- X), Version XX. X(XX), RELEASE SOFTWARE (fc. Copyright (c) 1. 98. Systems, Inc. Compiled Mon 2. Mar- 0. 2 2. 0: 3. Image text- base: 0x. ROM: System Bootstrap, Version xx. XA4, RELEASE SOFTWARE (fc. XXXX uptime is 2. System returned to ROM by reload. System image file is “flash: c. XXXX- X- XX. XXX- XX. Check it here. Note: In step 1 or after the upgrade, if the router boots into rommon mode or boot mode and you have one of the following case: rommon 1 > dir flash: device does not contain a valid magic number dir: cannot open device “flash: ” rommon 2 > orrouter(boot)> device does not contain a valid magic numberboot: cannot open “flash: ”boot: cannot determine first file name on device “flash: ”This means that the flash is empty or the file system is corrupted. In this case, you have to consider using the procedure of Upgrading or Installing the IOS from ROMmon mode . Upgrade Procedure for Cisco Routers with PCMCIA Flash: 1. Create a console connection with the default settings (9. If your router does not boot regularly, refer to the note above. Check if you have enough space in the flash card for the new IOS file: Router#dir slot. If you find that there is not enough space, you can delete one or more files from the flash: Router#delete slot. FILENAME. bin. If you delete on or more files from the flash DO NOT reload or powercycle the router until you finish this procedure. The flash image you are working on is currently loaded into RAM, so you can keep working properly until you reload or powercycle the router. Verify the connectivity to the TFTP sever with the ‘ping’ command. And make sure that the TFTP server software is running and the working directory of the TFTP server contains the new IOS file. It is also adviced that you backup the configuration and old IOS file before proceeding. For this purpose, you can refer to IOS backup procedure and configuration backup procedure. Copy the new IOS file from the TFTP server to the router: Router#copy tftp slot. Address or name of remote host []? XXX. XXX. XXX. XXXSource filename []? XXXX- X- XX. XXX- XX. Destination filename [c. XXXX- X- XX. XXX- XX. Accessing tftp: //XXX. XXX. XXX. XXX/c. XXXX- X- XX. XXX- XX. bin…Erase slot. You can say ‘no’ here because you have already emptied space for the new IOS file. Loading c. XXXX- X- XX. XXX- XX. bin from XXX. XXX. XXX. XXX (via Ethernet. OK – xxxxxxx/yyyyyyy bytes]Verifying checksum… OK (0x. F0)xxxxxxx bytes copied in 6. Router#5. Verify the new IOS file in the flash car: Router#dir slot. Direct the router to load the new IOS file in the next boot: Router(config)#no boot system. Router(config)#boot system flash slot. XXXX- X- XX. XXX- XX. Make sure that the configuration register has the value of 0x. This is verified by the ‘show version’ command. If the configuration register has a value other than 0x. Router(config)#config- register 0x. Save the configuration with one of the two following commands: Router#write memory. Or. Router#copy run start. Reload the router with ‘reload’ command. And after the reload, verify the new IOS version with the ‘show version’ command. This command will also show you the name of the IOS file that has been loaded. HD - Cisco IOS Image Backup and Restore/Upgrade via TFTPhttp: //www. A quick video demonstration on backing up and restoring/upgrading the Cisco IOS image from a Cisco router and/or switch.
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