Reference Guide

● If the primary boot line is A: and the A: partition contains a valid image, the primary boot line is set to A:, the secondary boot
line is set to B: (if B: also contains a valid image), and default boot line is set to a Null String.
● If the primary boot line is B: and the B: partition contains a valid image, the primary boot line is set to B:, the secondary boot
line is set to A: (if A: also contains a valid image), and default boot line is set to a Null string.
● If either partition contains an invalid or corrupted image, the partition is not set in any of the boot lines. If both partitions
contain invalid images, the primary, secondary, and default boot lines are set to a Null string.
When you use a network boot procedure to boot the switch, the reset boot variables are displayed below restore bootvar
in the command output.
● If the primary partition contains a valid image and the secondary partition does not contain a valid image, the primary boot
line is set to A: and the secondary and default boot lines are set to a Null string.
● If both partitions have valid images, the primary boot line value is set to the partition configured to boot the device in case of
a network failure. The secondary and default boot lines are set to a Null string.
Important Points to Remember
● The CLI remains at the boot prompt if no partition contains a valid image.
● To enable a TFTP boot after restoring factory default settings, you must stop the boot process using the boot-line interface
(BLI).
● The tftpboot command does not work after you perform a reset bootvar because the management IP address,
network mask, and gateway IP address are all reset to NULL.
In case the system fails to reload the image from a flash partition, follow these steps:
1. Power-cycle the chassis (pull the power cord and reinsert it).
2. When prompted by the system, press the Esc key to abort the boot process.
You are placed in the boot-line interface (BLI) at the BOOT_USER # prompt.
Press any key
3. Assign the new location of the FTOS image to be used when the system reloads.
To boot from flash partition A:
BOOT_USER # boot change primary
boot device : flash
file name : systema
BOOT_USER #
To boot from flash partition B:
BOOT_USER # boot change primary
boot device : flash
file name : systemb
BOOT_USER #
To boot from the network:
BOOT_USER # boot change primary
boot device : tftp
file name : FTOS-SI-9-5-0-169.bin
Server IP address : 10.16.127.35
BOOT_USER #
4. Assign an IP address and network mask to the Management Ethernet interface.
BOOT_USER # interface management ethernet ip address ip_address_with_mask
For example, 10.16.150.106/16.
5. Assign an IP address as the default gateway for the system.
Switch Management
65