Compare SONiC Installation, Upgrade, and Downgrade Methods SONIC-DEPLOY Practice Questions (Page 4)

Questions 16–20

1. 16application · medium

   A switch was recently upgraded to SONiC 202111, but the configuration from the previous version is not being applied correctly. The administrator needs to revert to the previous version and ensure the configuration is compatible. What should the administrator do first?

   • ARestore the configuration from a backup taken before the upgrade.
   • BReboot the switch and select the previous image from the boot menu.
   • CCheck the configuration compatibility between the two versions and adjust the configuration if needed.
   • DPerform a fresh installation of the previous version using ONIE.
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2. 17expert · hard

   A data center is deploying 100 new switches. The switches are ONIE-compatible, but the network team has not yet configured the management network for the new switches. The switches are physically installed and have console access. The team needs to install SONiC on all switches quickly. The team has a USB drive with the SONiC image, but only one USB drive is available. What is the most efficient approach?

   • AUse the console to transfer the image directly to each switch.
   • BInstall SONiC on one switch via USB, then clone its disk to the other switches.
   • CUse the single USB drive to install SONiC on each switch one by one.
   • DConfigure the management network on each switch via console, then use ONIE network installation from a central server.
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4. 18application · medium

   A network engineer is deploying a new switch model that does not have SONiC pre-installed. The switch supports ONIE, and the engineer needs to install SONiC across 50 identical switches in a data center. The engineer wants a method that is consistent, requires minimal physical access, and can be repeated for all switches. Which installation method should the engineer choose?

   • APre-configure the switches with a management IP and use SSH to copy the image to the flash partition.
   • BConnect a USB drive with the SONiC image to each switch and install manually via the ONIE rescue shell.
   • CBoot each switch into ONIE and use the ONIE discovery mechanism to install from a local network server.
   • DUse the existing switch firmware's web interface to upload the SONiC image directly.
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5. 19application · medium

   A network administrator needs to upgrade a SONiC switch from version 202012 to 202111. The switch is in a remote location and the administrator has console access only. The administrator wants to minimize downtime and be able to roll back if the new version has issues. What is the best approach?

   • AUse the sonic-installer to install the new image alongside the current one, then reboot and select the new image.
   • BDownload the new image to the switch and use the 'reboot' command to load it.
   • CUpgrade individual packages using apt-get to the new version.
   • DPerform a fresh installation of the new image using ONIE over the network.
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6. 20foundation · easy

   When downgrading SONiC to an older image, what is a common consideration regarding the configuration?

   • AThe configuration may not be compatible with the older version and may need to be adjusted
   • BThe configuration is automatically migrated to be compatible with the older version
   • CThe configuration is erased during the downgrade process
   • DThe configuration is backed up and restored automatically
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