Redundant Bandwidth Management Appliances

Setting up Redundant Systems

While all of our hardware appliances include bypass hardware which can take the system offline in case of failure, when the system fails or is down for maintenance, your network loses the benefits of traffic shaping. Many networks are so reliant on traffic management that they cannot function properly without it. If you require redundant systems in your network, you can set up 2 ET/BWMGR appliances in series to create a redundant environment.


The redundant setup incorporates 2 identical systems with bypass cards connected in series in the data path as shown. One system is configured as the "Master" and the other as "Slave". The master unit is online like a normal, standalone system. The slave unit remains offline until it detects the master is down. If the master is down, the slave puts itself online. The slave also maintains a copy of the configuration by syncing with the master whenever changes are made. The process flow of the master - slave subsystems is described below:

Redundant flow

Setting Up Redundant Systems

All you need to do to enable redundancy is to set the Master Address in the defaults configuration. On the Master system, set the slave IP address, and on the Slave system, set the Master address. The bypassd daemon manages the redundancy function automatically when these parameters are set correctly.

Next: Bandwidth Management Technology Comparison