Chapter 4: Redundancy
NetEnforcer AC-2500 Hardware Guide
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The remaining interfaces of the bypass units remain unconnected.
Serial Redundancy
In Serial Redundancy two bypass units are connected to the network in serial and the
two NetEnforcers work in Active/Bypass mode.
One NetEnforcer is in active mode at all times, and the other is in bypass mode. There is
no NetEnforcer is standby mode. When the active unit moves to bypass, the passive
NetEnforcer switches to active.
Even if the previously active NetEnforcer recovers, it will remain in bypass. The
system will not try to converge to a pre-determined configuration, as it does in parallel
redundancy
In a normal situation the Primary Bypass forwards all traffic to the Primary
NetEnforcer’s which is in Active mode.
Figure
4-5 – Serial Redundancy – Normal Scenario
