Technical data

FastIron Ethernet Switch Administration Guide 75

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Software versions installed and running on a device

Displaying the image versions installed in flash memory

Enter the show flash command to display the boot and flash images installed on the device. An

example of the command output is shown in “Displaying the boot image version running on the

device” on page 74:

• The “Compressed Pri Code size” line lists the flash code version installed in the primary flash

area.

• The “Compressed Sec Code size” line lists the flash code version installed in the secondary

flash area.

• The “Boot Monitor Image size” line lists the boot code version installed in flash memory. The

device does not have separate primary and secondary flash areas for the boot image. The

flash memory module contains only one boot image.

NOTE

To minimize the boot-monitor image size on FastIron devices, the ping and tftp operations

performed in the boot-monitor mode are restricted to copper ports on the FastIron Chassis

management modules and to copper ports on the FastIron stackable switch combination

copper and fiber ports. The fiber ports on these devices do not have the ability to ping or tftp

from the boot-monitor mode.

Flash image verification

The Flash Image Verification feature allows you to verify boot images based on hash codes, and to

generate hash codes where needed. This feature lets you select from three data integrity

verification algorithms:

• MD5 - Message Digest algorithm (RFC 1321)

• SHA1 - US Secure Hash Algorithm (RFC 3174)

• CRC - Cyclic Redundancy Checksum algorithm

Flash image CLI commands

Use the following command syntax to verify the flash image:

Syntax: verify md5 | sha1 | crc32 ASCII string | primary | secondary [hash code]

• md5 – Generates a 16-byte hash code

• sha1 – Generates a 20-byte hash code

• crc32 – Generates a 4 byte checksum

• ascii string – A valid image filename

• primary – The primary boot image (primary.img)

• secondary – The secondary boot image (secondary.img)

• hash code – The hash code to verify

The following examples show how the verify command can be used in a variety of circumstances.

To generate an MD5 hash value for the secondary image, enter the following command.