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101 · Question #54

Which statement is true concerning the default communication between a redundant pair of BIG- IP devices.

The correct answer is B. Data for both connection and persistence mirroring are shared through the same TCP connection.. In a BIG-IP redundant pair, both connection mirroring and persistence mirroring data are multiplexed over a single shared TCP connection rather than using separate connections.

Section 3: Load Balancing and High Availability Basics

Question

Which statement is true concerning the default communication between a redundant pair of BIG- IP devices.

Options

  • ACommunication between the systems cannot be effected by port lockdown settings.
  • BData for both connection and persistence mirroring are shared through the same TCP connection.
  • CRegardless of the configuration, some data is communicated between the systems at regular
  • DConnection mirroring data is shared through the serial failover cable unless network failover is

How the community answered

(61 responses)
  • A
    3% (2)
  • B
    79% (48)
  • C
    7% (4)
  • D
    11% (7)

Why each option

In a BIG-IP redundant pair, both connection mirroring and persistence mirroring data are multiplexed over a single shared TCP connection rather than using separate connections.

ACommunication between the systems cannot be effected by port lockdown settings.

Port lockdown settings on self IPs can and do affect HA communication, including failover and mirroring traffic, so the statement that they cannot is false.

BData for both connection and persistence mirroring are shared through the same TCP connection.Correct

F5 BIG-IP uses a single TCP connection between the active and standby unit to carry all mirroring traffic - both connection mirroring data (state table entries) and persistence mirroring data (persistence records) share this same channel, reducing overhead and simplifying the HA communication path.

CRegardless of the configuration, some data is communicated between the systems at regular

Mirroring data is only communicated when mirroring is explicitly enabled and active connections exist; it is not sent at fixed regular intervals regardless of configuration.

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

Connection mirroring uses the network (not the serial failover cable); the serial cable is used specifically for serial failover heartbeat signaling, not for mirroring data.

Concept tested: BIG-IP HA mirroring communication channel

Source: https://support.f5.com/csp/article/K13637

Topics

#connection mirroring#persistence mirroring#redundant pair#failover communication

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