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201 · Question #321

Given that VLAN failsafe is enabled on the external VLAN and the network that the active BIG-IP's external VLAN is connected to has failed, which statement is always true about the results?

The correct answer is A. The active system will note the failure in the HA table.. When VLAN failsafe is enabled and an external VLAN's network connection fails, the BIG-IP system will log this event in the High Availability (HA) table, which is the initial step for triggering failover actions.

Section 6: Configure High Availability

Question

Given that VLAN failsafe is enabled on the external VLAN and the network that the active BIG-IP's external VLAN is connected to has failed, which statement is always true about the results?

Options

  • AThe active system will note the failure in the HA table.
  • BThe active system will reboot and the standby system will go into active mode.
  • CThe active system will failover and the standby system will go into active mode.
  • DThe active system will restart the traffic management module to eliminate the possibility that BIG- IP

How the community answered

(37 responses)
  • A
    95% (35)
  • B
    3% (1)
  • D
    3% (1)

Why each option

When VLAN failsafe is enabled and an external VLAN's network connection fails, the BIG-IP system will log this event in the High Availability (HA) table, which is the initial step for triggering failover actions.

AThe active system will note the failure in the HA table.Correct

VLAN failsafe monitors network connectivity on specified VLANs. When a failure is detected, the BIG-IP system records this event in the HA table, initiating the configured failover action, which could be rebooting, restarting TMM, or failing over, depending on the specific failsafe settings.

BThe active system will reboot and the standby system will go into active mode.

While rebooting is a possible action for VLAN failsafe, it is not always true; the system can also be configured to failover or restart TMM.

CThe active system will failover and the standby system will go into active mode.

While failover is a possible action for VLAN failsafe, it is not always true; the system can also be configured to reboot or restart TMM.

DThe active system will restart the traffic management module to eliminate the possibility that BIG- IP

Restarting the traffic management module (TMM) is one of the possible failsafe actions, but it is not always the outcome; the system might reboot or failover instead.

Concept tested: BIG-IP VLAN failsafe behavior

Source: https://techdocs.f5.com/en-us/bigip-15-1-0/big-ip-system-administration/configuring-vlan-failsafe.html

Topics

#VLAN failsafe#HA#failover mechanism#network failure

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