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201 · Question #351

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. For redundant BIG-IP systems, connection mirroring and persistence mirroring data, which are vital for maintaining active sessions and client-server persistence during failover, are shared over a TCP connection using port 1028 by default. This ensures stateful failover.

Section 6: Configure High Availability

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 fail over cable unless network failover is

How the community answered

(28 responses)
  • A
    4% (1)
  • B
    93% (26)
  • D
    4% (1)

Why each option

For redundant BIG-IP systems, connection mirroring and persistence mirroring data, which are vital for maintaining active sessions and client-server persistence during failover, are shared over a TCP connection using port 1028 by default. This ensures stateful failover.

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

Configuration synchronization (ConfigSync) between BIG-IP systems typically uses TCP port 443 (HTTPS) for secure communication, not ports 683 and 684.

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

Connection mirroring data, which includes the state of active client connections, is transmitted between BIG-IP devices via a TCP connection using port 1028 by default to allow for seamless failover without interrupting active sessions.

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

Persistence mirroring data, which maintains the client-server relationship for load balancing decisions, is also shared between BIG-IP systems over a TCP connection using port 1028 by default to ensure consistent routing post-failover.

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

Connection mirroring data is shared over a network connection, typically the management or self-IP network, and not through the serial failover cable, which is primarily used for heartbeat and failover signals.

Concept tested: F5 BIG-IP HA communication ports

Source: https://support.f5.com/csp/article/K16715

Topics

#connection mirroring#persistence mirroring#HA communication#TCP ports

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