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201 · Question #56

Given that VLAN failsafe is enabled on the external VLAN and the network that the active BIGIP'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 a network failure occurs on the monitored VLAN, the active system will always detect and record this critical event in its HA table.

Section 6: Configure High Availability

Question

Given that VLAN failsafe is enabled on the external VLAN and the network that the active BIGIP'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 BIGIP is the

How the community answered

(19 responses)
  • A
    74% (14)
  • B
    5% (1)
  • C
    5% (1)
  • D
    16% (3)

Why each option

When VLAN failsafe is enabled and a network failure occurs on the monitored VLAN, the active system will always detect and record this critical event in its HA table.

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

When VLAN failsafe is triggered due to a network failure on a monitored VLAN, the active system detects and records this critical event, which influences its high availability state.

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

Rebooting is an optional failsafe action; VLAN failsafe can also be configured to simply initiate a failover without a reboot.

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

Initiating a failover is one possible configured action for VLAN failsafe, but it is not always true as reboot is another available action.

DThe active system will restart the traffic management module to eliminate the possibility that BIGIP is the

Restarting the TMM is not a standard or configurable action for VLAN failsafe; the common actions are failover or reboot.

Concept tested: BIG-IP VLAN failsafe behavior

Source: https://techdocs.f5.com/kb/en-us/products/big-ip_ltm/manuals/product/bigip-concepts-11-2-0/bigip-vlan-failsafe.html

Topics

#VLAN failsafe#high availability#failover trigger

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