Information Technology Reference
In-Depth Information
Table3-9
Booting: Router Partially Boots from Flash and Displays Boot Prompt (continued)
Possible Problem
Solution
Missing
boot
system flash
global
configuration
command
Use the
show running-config
privileged exec command to
determine whether the configuration includes a
boot system
flash
global configuration command entry. Use the
show
startup-config
privileged exec command to determine
whether the
boot system flash
command is included in the
configuration stored in NVRAM.
2
1.
Check the order of the
boot system
commands. For the
recommended ordering, refer to the section "Fault-Tolerant
Boot Strategies," earlier in this chapter.
2.
Add the
boot system flash
command or reorder the
boot
system
commands, if necessary.
3.
Save the configuration change to NVRAM using the
copy
running-config startup-config
privileged exec command.
The required syntax is as follows:
4.
copy running-config {rcp
|
startup-config
|
tftp
|
file-id} (Cisco 7000,
Cisco 7200, and Cisco 7500 series only)
Missing
boot
system flash
global
configuration
command
(continued)
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 a
device:filename
as the destination of the
copy operation. The device argument is optional, but when it
is used, the colon (:) is required.
Misconfigured
configuration
register
Use the
show version
exec command to check the configuration
register setting. Make sure that it is set to boot from Flash
memory. Refer to your hardware installation and maintenance
publication for details regarding configuration register settings.
1.
TFTP = Trivial File Transfer Protocol
2.
NVRAM = nonvolatile random-access memory
Booting: Router Cannot Network Boot from TFTP Server
Symptom:
Router cannot boot from a TFTP server. The router tries to obtain its system image over the
network but fails.
The following output is an example of a failed network boot session:
Booting gs3-bfx..........[failed]
