Barracuda Networks SP4 User Manual download pdf (Page 54)

54 Release and Migration Notes - Updating HA-Synced Units or HA-Synced NG Control Centers

Updating HA-Synced Units or HA-Synced NG

Control Centers

In the instructions below, the term "primary unit" refers to the unit used for regular operation, while "HA

unit" refers to the secondary unit used as a failover system.

Barracuda Networks strongly recommends to follow the procedure for updating HA systems exactly as

described below in order to minimize any operational drop outs.

Step 1: Prepare the HA Unit

• Log-in to the HA unit using Barracuda NG Admin.

• Block the (standby) server on the HA unit within

Control > Server.

Step 2: Update the HA Unit

• Update the HA unit using SSH as delineated in Updating Units or NG Control

Centers using SSH, page 53.

No more interaction with the HA unit is necessary. Wait until the update is finished. Depending on the

hardware, it will need from 15 minutes on the fastest appliances up to 60 minutes on the flash

appliances.

Step 3: Switch Servers to the HA Unit and Prepare the Primary Unit

• Log-in to the primary unit using Barracuda NG Admin.

For Firewall and Configuration HA synchronizing with one of the units running 5.2.x, the other unit in the HA

partnership must run at least firmware release version 5.0. HA synchronizing between a 5.2.x unit and a 4.x unit is not

possible.

Do not interrupt the update procedure. During update, the unit boots several times and due to this, the connection will

be terminated. Indicators that the update process has been finished are the following output on the console:

Barracuda NG Firewall release 5.2.3-xxx, or the operativeness of logging in again using SSH or Barracuda

NG Admin.

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Barracuda Networks SP4 User Manual Page 54