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101 · Question #6

Which two statements are true concerning the default communication between a redundant pair of BIG-IP systems. (Choose two.)

The correct answer is B. Connection mirroring data is shared via a TCP connection using port 1028. C. Persistence mirroring data is shared via a TCP connection using port 1028.. BIG-IP redundant pairs use TCP port 1028 for both connection mirroring and persistence mirroring between active and standby devices by default.

Section 3: Load Balancing and High Availability Basics

Question

Which two statements are true concerning the default communication between a redundant pair of BIG-IP systems. (Choose two.)

Options

  • ASynchronization occurs via a TCP connection using ports 683 and 684.
  • BConnection mirroring data is shared via a TCP connection using port 1028.
  • CPersistence mirroring data is shared via a TCP connection using port 1028.
  • DConnection mirroring data is shared through the serial failover cable unless network failover is

How the community answered

(45 responses)
  • A
    4% (2)
  • B
    87% (39)
  • D
    9% (4)

Why each option

BIG-IP redundant pairs use TCP port 1028 for both connection mirroring and persistence mirroring between active and standby devices by default.

ASynchronization occurs via a TCP connection using ports 683 and 684.

Ports 683 and 684 are not the standard ports used for BIG-IP configuration synchronization; this does not accurately describe the default redundancy communication mechanism.

BConnection mirroring data is shared via a TCP connection using port 1028.Correct

Connection mirroring data is transmitted over a dedicated TCP connection on port 1028, allowing the standby device to maintain a replica of active connection table entries so it can assume traffic forwarding seamlessly during a failover event.

CPersistence mirroring data is shared via a TCP connection using port 1028.Correct

Persistence mirroring data is also shared over TCP port 1028, ensuring that client-to-server persistence records are replicated to the standby unit so established session persistence is not lost after a failover.

DConnection mirroring data is shared through the serial failover cable unless network failover is

Connection mirroring uses the network failover communication path over TCP port 1028, not a serial failover cable; the serial cable is used only as a failover heartbeat signal, not for mirroring data.

Concept tested: BIG-IP connection and persistence mirroring port 1028

Source: https://support.f5.com/csp/article/K13946

Topics

#connection mirroring#persistence mirroring#TCP ports#redundant pair

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