Which two conditions occur when the primary route processor fails on a switch that is using dual route processors with stateful switchover? (Choose two.)

Question

Options

• AData forwarding can continue along known paths until routing protocol information is restored.
• BData forwarding is stopped until the routing protocols reconverge after the switchover.
• CThe standby route processor is fully initialized and state information is maintained.
• DUser sessions are immediately recreated on the new active route processor.
• EThe standby route processor initialization is started when the primary router processor fails.

• A
  95% (20)
• B
  5% (1)

Explanation

Stateful Switchover (SSO) Explained

Why A and C are correct: With Stateful Switchover (SSO), the standby route processor is pre-initialized and continuously synchronized with the primary, maintaining state information at all times (C). Because the standby is already fully synchronized, the switch can continue forwarding traffic along existing CEF (Cisco Express Forwarding) paths during the switchover, even before routing protocols fully reconverge (A).

Why the distractors are wrong:

• B is wrong because SSO's entire purpose is to prevent forwarding interruption - traffic continues using the existing forwarding table.
• D is wrong because user sessions are preserved, not recreated; SSO maintains session state so users experience no disruption.
• E is wrong because initialization does not start at failure - the standby is already fully initialized beforehand; that's what makes SSO different from basic redundancy.

Memory Tip: Think of SSO as a "co-pilot already at the controls" - the standby isn't waiting to start up; it's already flying alongside and takes over seamlessly, keeping all existing routes and sessions intact. If you had to restart initialization, that would be NSF (Non-Stop Forwarding) without SSO, not true stateful switchover.

No community discussion yet for this question.