Apply a Hotfix using the Command Line Interface

Use the following procedure to apply a hotfix that resolves compatibility issues with upgrades from earlier releases. Perform this procedure only if you are upgrading from an EOS version between 3.1.70 and 3.5.1.

Unzip the upgrade archive and locate the hotfix file.
Access the CLI using one of the following methods:
(Refer to the Access the Command Line Interface article for more details.)
- Console port
- SSHv2 connection
- Management Interface
- ELFIQ Central CLI
Enter ena and enter the password for enable mode when prompted.
The prompt changes to show that you are in enable mode.
Enter eosupdate
When prompted, enter the transfer type, IP address, port number, and filename.
Enter one of the following:
- Y to accept the values you entered
- N to re-enter the values
- A to cancel the operation
  The device connects to the remote server.
Enter the password for the server.
Note: If you are prompted to accept the SSH certificate host file during the connection, enter Y to accept the certificate; otherwise, the upgrade process is cancelled.
Enter Y to confirm the upgrade or N to cancel the operation.
Note: Do not reboot the Link Balancer before upgrading to the target EOS.
Upgrade to the current release using one of the procedures listed in the Upgrade Process.