201 · Question #278
Assuming there are open connections through an active system's NAT and a fail over occurs, by default, what happens to those connections?
The correct answer is B. All open connections will be maintained. By default, when connection mirroring is enabled in a BIG-IP redundant pair, all active connections, including those through NAT, are maintained during a failover.
Question
Assuming there are open connections through an active system's NAT and a fail over occurs, by default, what happens to those connections?
Exhibit
Options
- AAll open connections will be lost.
- BAll open connections will be maintained.
- CThe "Mirror" option must be chosen on the NAT and the setting synchronized prior to the connection
- DLonglived connections such as Telnet and FTP will be maintained while shortlived connections such
- EAll open connections are lost, but new connections are initiated by the newly active BIG IP, resulting
How the community answered
(46 responses)- A7% (3)
- B89% (41)
- C2% (1)
- D2% (1)
Why each option
By default, when connection mirroring is enabled in a BIG-IP redundant pair, all active connections, including those through NAT, are maintained during a failover.
This is incorrect; connection mirroring is specifically designed to prevent the loss of open connections during a failover.
The BIG-IP system, when configured with connection mirroring in a high availability setup, continuously synchronizes the state of active connections, including NAT translations, to the standby unit. During a failover event, the newly active unit takes over these mirrored connections seamlessly, preventing interruption and ensuring service continuity.
While connection mirroring must be enabled, the question asks what happens 'by default' during a failover, implying the necessary configuration is already in place, not what must be done prior to establishing connections.
BIG-IP connection mirroring typically preserves the state of all connection types, not just long-lived ones, ensuring full session persistence.
This statement contradicts the purpose of connection mirroring, which is to maintain existing connections rather than losing and re-initiating them.
Concept tested: BIG-IP connection mirroring and failover
Source: https://techdocs.f5.com/en-us/big-ip-system-and-network-management-16-0-0/big-ip-system-redundant-pair-configuration-and-management/configuring-connection-mirroring.html
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