An active/standby pair of LTM devices deployed with network failover are working as desired. After external personnel perform maintenance on the network, the
LTM devices are active/active rather than active/standby. No changes were made on the LTM devices during the network maintenance.
Which two actions would help determine the cause of the malfunction? (Choose two.)
To determine the cause of the malfunction where LTM devices are behaving as active/active instead of active/standby, it's essential to check the network configuration and connectivity. Checking the configuration of the VLAN used for failover helps ensure that the communication path essential for the failover process is intact. Additionally, examining the open ports in firewalls between the LTM devices is crucial to confirm that no ports needed for failover communication are being blocked.
@SimonR2 I think BD is correct, because B : if you use a VLAN to create your device trust, if the VLAN is splitted, each F5 will not be able to reach the other F5 and will then be active/active D : Same, if the device trust is going through a Firewall (never seen this in prod...) and someone block the port used to do the failover, each F5 will go active too.
Yeah you are right, for some reason i read them as internal/external vlans. If they have made changes on the switch which affect the HA VLAN then we would almost certainly see it go active-active.
BD - Correct
I believe the correct answer here is DE. Specifically because it says no changes were made on the f5 devices, only on the external equipment. If the devices have gone active active then they may have lost communication with each other or their time may now be out of sync.