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.
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
Getting Started
66
Содержание S4048T
Страница 1: ...Dell Configuration Guide for the S4048T ON System 9 10 0 1 ...
Страница 98: ... saveenv 7 Reload the system uBoot mode reset Management 98 ...
Страница 113: ...Total CFM Pkts 10303 CCM Pkts 0 LBM Pkts 0 LTM Pkts 3 LBR Pkts 0 LTR Pkts 0 802 1ag 113 ...
Страница 411: ...mode transit no disable Force10 Resilient Ring Protocol FRRP 411 ...
Страница 590: ...Figure 67 Inspecting the LAG Configuration Link Aggregation Control Protocol LACP 590 ...
Страница 591: ...Figure 68 Inspecting Configuration of LAG 10 on ALPHA Link Aggregation Control Protocol LACP 591 ...
Страница 594: ...Figure 70 Inspecting a LAG Port on BRAVO Using the show interface Command Link Aggregation Control Protocol LACP 594 ...
Страница 595: ...Figure 71 Inspecting LAG 10 Using the show interfaces port channel Command Link Aggregation Control Protocol LACP 595 ...
Страница 646: ...Figure 87 Configuring Interfaces for MSDP Multicast Source Discovery Protocol MSDP 646 ...
Страница 647: ...Figure 88 Configuring OSPF and BGP for MSDP Multicast Source Discovery Protocol MSDP 647 ...
Страница 648: ...Figure 89 Configuring PIM in Multiple Routing Domains Multicast Source Discovery Protocol MSDP 648 ...
Страница 653: ...Figure 91 MSDP Default Peer Scenario 2 Multicast Source Discovery Protocol MSDP 653 ...
Страница 654: ...Figure 92 MSDP Default Peer Scenario 3 Multicast Source Discovery Protocol MSDP 654 ...
Страница 955: ...Figure 119 Single and Double Tag First byte TPID Match Service Provider Bridging 955 ...
Страница 1179: ...Figure 147 Create Hypervisor Figure 148 Edit Hypervisor Figure 149 Create Transport Connector Virtual Extensible LAN VXLAN 1179 ...