Forum Discussion

Thiyagu_343098's avatar
Thiyagu_343098
Icon for Nimbostratus rankNimbostratus
May 02, 2018

VLAN failsafe

Hello All, I want to know more about the VLAN failsafe option. Could you please help me to know   1- in which scenario we have to use the option? 2- What are the drawback of this option? 3- what ...
application delivery
BIG-IP
LTM
Lee_Sutcliffe's avatar
Lee_Sutcliffe
Icon for Nacreous rankNacreous
May 02, 2018

There is no requirement to use VLAN failsafe, it is used to trigger a failure condition in the event that F5 detects a loss in network activity on a given VLAN. It is not the most graceful of HA detection methods but can be useful in some environments. Vlan failsafe is slow, the minimum timeout is 10 seconds which is unacceptable in many environments.

 

I would recommend looking at HA Groups/Fast Failover as you can have a more granular failure scenario, such as pools going down or the loss of a default gateway. It uses a scoring mechanism and will failover more quickly than traditional methods such as VLAN failsafe.

 

Manual Chapter: Understanding Fast Failover

 

K16947: Best practices for the HA group feature