A e-commerce network has many devices that often need to be upgraded on a regular basis. What technology will ensure IP packets continue to be forwarded even during a device failover?

The correct answer is B. nonstop forwarding. Nonstop Forwarding (NSF) ensures that the data plane (hardware forwarding) continues to forward IP packets uninterrupted even when the control plane (route processor) fails or undergoes a switchover. NSF works in conjunction with Stateful Switchover (SSO), which synchronizes…

Advanced Data Center Networks

Question

Options

Astateful switchover
Bnonstop forwarding
Croute processor redundancy
Doptimized edge routing
Eenhanced object tracking

How the community answered

(54 responses)

B
89% (48)
C
2% (1)
D
6% (3)
E
4% (2)

Explanation

Nonstop Forwarding (NSF) ensures that the data plane (hardware forwarding) continues to forward IP packets uninterrupted even when the control plane (route processor) fails or undergoes a switchover. NSF works in conjunction with Stateful Switchover (SSO), which synchronizes state between redundant supervisors/route processors. The key distinction is that SSO handles the control-plane state synchronization, while NSF specifically keeps traffic flowing in the forwarding plane during that transition. Route Processor Redundancy (RPR) is an older mode that reloads the standby RP upon failover, causing a brief traffic interruption - making NSF the correct answer for zero-disruption packet forwarding.

Topics

#NSF#nonstop forwarding#routing resilience#device failover

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