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System image, configuration, and data files must be present on USB CF in slot0 for the router to boot and perform normal file operations.

Legacy CF will not operate in Cisco 3900 series, Cisco 2900 series, and Cisco 1900 series ISRs.

When legacy CF is inserted, the following error message appears.

Use of this card during normal operation can impact and severely degrade performance of the system.

CF in Slot0 stores system image, configuration, and data files.

CF must be present in this slot for the router to boot and perform normal file operations.

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For example, you may want to upgrade your IOS software to the latest release, or you may want to use the same Cisco IOS release for all the routers in a network.

Each system image contains different sets of Cisco IOS features, therefore select an appropriate system image to suit your network requirements.

You must have an account at Cisco.com.

If you do not have an account or have forgotten your username or password, click Cancel at the login dialog box and follow the instructions that appear.

If you do not have an account or have forgotten your username or password, click Cancel at the login dialog box, and follow the instructions that appear.

See the Information About Upgrading the System Image section.

If you are not sure which files can be safely deleted, either consult your network administrator or upgrade your compact flash memory card to a size that can accommodate both the existing files and the new system image.

When prompted, enter the filename and the servers hostname or IP address.

This is the recommended and most common method of upgrading the system image.

Many third-party vendors provide free TFTP server software, which you can find by searching for TFTP server in a web search engine.

We recommend that you connect your PC directly to the router console port.

If you cannot successfully ping between the TFTP or RCP server and the router, do one of the following.

See the Determining IP Addresses: Frequently Asked Questions tech note.

Typically, the same filename is entered as was used in Step 4.

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