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For a particular target where VRF is enabled, the show output is similar to the following:
Feature State
------------------------
VRF Enabled
View Command History
The command-history trace feature captures all commands entered by all users of the system with a time stamp and writes
these messages to a dedicated trace log buffer.
The system generates a trace message for each executed command. No password information is saved to the file.
To view the command-history trace, use the show command-history command.
Example of the show command-history Command
Dell#show command-history
[5/18 21:58:32]: CMD-(TEL0):[enable]by admin from vty0 (10.11.68.5)
[5/18 21:58:48]: CMD-(TEL0):[configure]by admin from vty0 (10.11.68.5)
- Repeated 1 time.
[5/18 21:58:57]: CMD-(TEL0):[interface port-channel 1]by admin from vty0 (10.11.68.5)
[5/18 21:59:9]: CMD-(TEL0):[show config]by admin from vty0 (10.11.68.5)
[5/18 22:4:32]: CMD-(TEL0):[exit]by admin from vty0 (10.11.68.5)
[5/18 22:4:41]: CMD-(TEL0):[show interfaces port-channel brief]by admin from vty0
(10.11.68.5)
Upgrading and Downgrading Dell Networking OS
To upgrade or downgrade Dell Networking OS, refer to the Release Notes for the version you want to load on the system.
Verify Software Images Before Installation
To validate the software image on the flash drive, you can use the MD5 message-digest algorithm or SHA256 Secure Hash
Algorithm, after the image is transferred to the system but before the image is installed. The validation calculates a hash value
of the downloaded image file on system’s flash drive, and, optionally, compares it to a Dell EMC Networking published hash for
that file.
The MD5 or SHA256 hash provides a method of validating that you have downloaded the original software. Calculating the
hash on the local image file and comparing the result to the hash published for that file on iSupport provides a high level
of confidence that the local copy is exactly the same as the published software image. This validation procedure, and the
verify {md5 | sha256} command to support it, prevents the installation of corrupted or modified images.
The verify {md5 | sha256} command calculates and displays the hash of any file on the specified local flash drive. You
can compare the displayed hash against the appropriate hash published on iSupport. Optionally, you can include the published
hash in the verify {md5 | sha256} command, which displays whether it matches the calculated hash of the indicated file.
To validate a software image:
1. Download Dell EMC Networking OS software image file from the iSupport page to the local (FTP or TFTP) server. The
published hash for that file displays next to the software image file on the iSupport page.
2. Go on to the Dell EMC Networking system and copy the software image to the flash drive, using the copy command.
3. Run the verify {md5 | sha256} [ flash://]img-file [hash-value] command. For example, verify
sha256 flash://FTOS-SE-9.5.0.0.bin
4. Compare the generated hash value to the expected hash value published on the iSupport page.
To validate the software image on the flash drive after the image is transferred to the system, but before you install the image,
use the verify {md5 | sha256} [ flash://]img-file [hash-value] command in EXEC mode.
● md5: MD5 message-digest algorithm
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