Booting Vector Error Occurs When Booting from Flash Memory

Symptom: Vector errors occur when a user is booting a router from Flash memory.

Table 3-11 outlines the problems that might cause this symptom and describes solutions to those problems.

Figure 3-2 Booting: Vector Error Occurs When Booting from Flash Memory

Possible Problem Solution

Compressed system

Step 1

Power-cycle the router.


Step 2

Within the first 60 seconds of booting, press the Break key to access the ROM monitor.

Step 3

At the ROM monitor prompt (>), enter o/r to set the configuration register to boot from ROM.

Step 4

Enter b to boot the router. The router enters setup mode.

Step 5

Press Ctrl-C to bypass the setup.

Step 6

Enter the configure memory privileged exec command.

Step 7

Obtain an uncompressed system image. From the router prompt, use the privileged exec command copy flash tftp to send the compressed image back to the TFTP1 server.

Decompress the image at the TFTP server. This cannot be done at the router.

Step 8

Use the copy tftp flash privileged exec command at the router to retrieve the uncompressed image. The following is an example of the use of the copy tftp flash command:

router# copy flash tftp filename

Compressed system The router asks you for the IP address of the TFTP server and the name of the image image file you are copying to the server. A sample of the output for this command using IP address and filename ic92130n follows:

IP address of remote host []? Name of file to copy []? ic92130n writing ic92130n !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! router#

Step 9 Check the configuration register using the show version exec command. Set the router to boot from Flash memory.

Step 10 Use the show running-config privileged exec command to determine whether the router configuration includes the boot system flash global configuration command in the correct order with respect to the other boot system commands.

Note: The boot system global configuration commands are saved in the order in which they were entered. The most recent entry goes to the bottom of the list. For the recommended ordering, refer to the section "Fault-Tolerant Boot Strategies" earlier in this chapter.

Step 11 Configure the boot system flash command if it is missing. Confirm that the order of boot system commands is correct. Use the copy running-config startup-config command to save this change. The required syntax is as follows:

copy running-config {rcp | startup-config | tftp | file-id] (Cisco 7000, Cisco 7200, and Cisco 7500 series only)

Syntax Description:

• rcp—Specifies a copy operation to a network server using RCP.

• startup-config—Specifies the configuration used for initialization as the destination of the copy operation. The Cisco 4500 series cannot use this keyword.

• tftp—Specifies a TFTP server as the destination of the copy operation.

• file-id—Specifies device: filename as the destination of the copy operation. The device argument is optional, but when it is used, the colon (:) is required.

Step 12 Enter the reload privileged exec command to restart the router.

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