Cisco 9134 - MDS Multilayer Fabric Switch Troubleshooting Manual page 63

Chapter 2 Troubleshooting Installs, Upgrades, and Reboots
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
Recovery procedures require the regular sequence to be interrupted. The internal switch sequence goes
through four phases between the time you turn on the switch and the time the switch prompt appears on
your terminal—BIOS, boot loader, kickstart, and system. (See
Table 2-6 Recovery Interruption
Phase Normal Prompt
BIOS
loader>
Boot loader
Starting
kickstart
Kickstart
Uncompressing
system
System
Login:
1. This prompt or message appears at the end of each phase.
2. This prompt or message appears when the switch cannot progress to the next phase.
3. Depending on your Telnet client, these keys may be reserved, and you need to remap the keystroke. Refer to the documentation provided by your Telnet
client.
Figure 2-3 Regular and Recovery Sequence
Regular
Power
BIOS
sequence
on
Interrupt
Power
Ctrl-C
regular
on
sequence
BIOS
Recovery
configuration
3 = Kickstart
image
OL-9285-05
1 2
Recovery Prompt
No bootable
device
loader>
switch(boot)#
—
2
1
Bootloader
No
No No
bootable
device
Yes Yes
Hanging
state
Power on 3 = Kickstart
and Ctrl-C
Troubleshooting Cisco SAN-OS Software System Reboots
Description
The BIOS begins the power-on self test, memory test, and other
operating system applications. While the test is in progress, press
Ctrl-C to enter the BIOS configuration utility and use the netboot
option.
The boot loader uncompresses loaded software to boot an image using
its file name as reference. These images are made available through
bootflash. When the memory test is over, press Esc to enter the boot
loader prompt.
When the boot loader phase is over, press Ctrl-]
right bracket key) to enter the
causes the console to stop at this prompt, copy the system image and
reboot the switch.
The system image loads the configuration file of the last saved running
configuration and returns a switch login prompt.
3
Kickstart
image
No Yes
Starting
Esc
kickstart
Yes No
loader> Hanging
prompt state
Power on
image and Esc
Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x
Table 2-6 and Figure
3
(Control key plus
prompt. If the corruption
switch(boot)#
4
System
image
Un-
No
compressing
CTRL-]
image
Yes No
Switch (boot)#
prompt
4 = System
image
2-3.)
Access
switch
Yes
Access
switch
2-15