Users Guide

specify a nondefault VRF, the VRF table corresponding to that nondefault VRF is used to look up the HTTP
server.
However, these changes are backward-compatible and do not affect existing behavior; meaning, you can still
use the ip http source- interface command to communicate with a particular interface even if no
VRF is configured on that interface
NOTE: If the HTTP service is not VRF-aware, then it uses the global routing table to perform the look-up.
To enable an HTTP client to look up the VRF table corresponding to either management VRF or any
nondefault VRF, use the ip http vrf command in CONFIGURATION mode.
• Configure an HTTP client with a VRF that is used to connect to the HTTP server.
CONFIGURATION MODE
Dell(conf)#ip http vrf {management | <vrf-name>}
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 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 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 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.
Getting Started 60