201 · Question #315
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. For BIG-IP redundant pairs, both connection and persistence mirroring data are efficiently transmitted over a single, shared TCP connection between the devices.
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 fail over cable unless network failover is
How the community answered
(28 responses)- A4% (1)
- B86% (24)
- C4% (1)
- D7% (2)
Why each option
For BIG-IP redundant pairs, both connection and persistence mirroring data are efficiently transmitted over a single, shared TCP connection between the devices.
Port lockdown settings on self-IP addresses explicitly control which services and traffic, including inter-device communication, are permitted on those interfaces.
F5 BIG-IP systems are designed to multiplex both connection mirroring and persistence mirroring data streams over a single TCP connection between the devices, optimizing resource utilization for state synchronization.
While failover heartbeat messages are communicated regularly, other types of communication, such as configuration synchronization or certain mirroring updates, can be event-driven rather than strictly regular, depending on the specific configuration and traffic.
The serial failover cable is primarily used for failover heartbeat communication for basic device health, not for the high-volume connection or persistence mirroring data, which is handled over the network.
Concept tested: BIG-IP HA communication and mirroring
Source: https://techdocs.f5.com/en-us/big-ip-15-0-0/big-ip-device-service-clustering-dsc-administration/config-ds-c-failover-and-sync-config/config-mirroring.html
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