Administrator Guide

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.

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

• sha256: SHA256 Secure Hash Algorithm

• flash: (Optional) Specifies the flash drive. The default uses the flash drive. You can enter the image file name.

• hash-value: (Optional). Specify the relevant hash published on iSupport.

• img-file: Enter the name of the Dell Networking software image file to validate

Examples: Without Entering the Hash Value for Verification

MD5

Dell# verify md5 flash://FTOS-SE-9.5.0.0.bin

MD5 hash for FTOS-SE-9.5.0.0.bin: 275ceb73a4f3118e1d6bcf7d75753459

SHA256

Dell# verify sha256 flash://FTOS-SE-9.5.0.0.bin

SHA256 hash for FTOS-SE-9.5.0.0.bin:

e6328c06faf814e6899ceead219afbf9360e986d692988023b749e6b2093e933

Examples: Entering the Hash Value for Verification

MD5

Dell# verify md5 flash://FTOS-SE-9.5.0.0.bin 275ceb73a4f3118e1d6bcf7d75753459

MD5 hash VERIFIED for FTOS-SE-9.5.0.0.bin

SHA256

Dell# verify sha256 flash://FTOS-SE-9.5.0.0.bin

e6328c06faf814e6899ceead219afbf9360e986d692988023b749e6b2093e933

SHA256 hash VERIFIED for FTOS-SE-9.5.0.0.bin

Using HTTP for File Transfers

Stating with Release 9.3(0.1), you can use HTTP to copy files or configuration details to a remote server. To transfer files to an external

server, use the copy source-file-url http://host[:port]/file-path command.

Enter the following source-file-url keywords and information:

• To copy a file from the internal FLASH, enter flash:// followed by the filename.

Getting Started