Chapter 6: Deploying the SG-9100
Allot SG-9100 Hardware Guide
6-2
Configuring Active Redundancy
Active redundancy is recommended for network topologies where at least two network
links are active in load-balancing mode. It requires two Service Gateway installations
and typically, no bypass units.
In the Active Redundancy configuration, a Service Gateway duplicates each link’s
traffic to the other Service Gateway. Both Service Gateways are active.
In the event that one of the links fails due to router, switch or line malfunction, the
network redundancy mechanism (for example, spanning tree) will ensure that traffic is
routed or switched via the other link and managed by the second Service Gateway.
Since both Service Gateways maintain a constant view of the two links, there will be no
loss of flow's state and other information required for correct shaping and application
classification.
In the Active Redundancy configuration, the two Service Gateways should share the
same policy configuration.
NOTE
Users should be aware that a Service Gateway working in Active
Redundancy mode duplicates all traffic passing through it.
Therefore, the overall throughput of each Service Gateway
in Active
Redundancy will be half of the throughput enabled.
