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MM_F_147944's avatar
MM_F_147944
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Mar 26, 2016
Solved

Network Failover

Can we Directly connect two F5 LAN ports for Network Fail over with HA Vlan.  
application delivery
BIG-IP
LTM
  • Hannes_Rapp_162's avatar
    Hannes_Rapp_162
    Mar 26, 2016

    Yes, and it's generally recommended to do so.

     

    I'd even recommend to use two physical interfaces (as Aggregated Trunk) for HA, unless you plan to use all other 7 interfaces for something else. It would make sense to use that HA trunk interface for three things: Config Sync, Network fail-over, Traffic Mirror

     

Hannes_Rapp's avatar
Hannes_Rapp
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Yes, and it's generally recommended to do so.

 

I'd even recommend to use two physical interfaces (as Aggregated Trunk) for HA, unless you plan to use all other 7 interfaces for something else. It would make sense to use that HA trunk interface for three things: Config Sync, Network fail-over, Traffic Mirror

 

Hannes_Rapp's avatar
Hannes_Rapp
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Mar 28, 2016
Your active appliance should reboot(or take another chosen action) 90 seconds after disabling a VLAN where the VLAN failsafe feature is enabled, regardless of hardwired failover that is in place. If you use VLAN failsafe feature, the HA VLAN itself doesn't have to be monitored. I do not see a good reason to enable VLAN failsafe feature on HA VLAN. Not to say that it's a best practice or anything, but my personal preference is to never use hardwired failover. It's great due to it's responsiveness, but it can only check the appliance's health on a very low level. I find the network failover feature reliable, and what's most important, it doesn't have any limitations (more on limitations in SOL article). Another option is to have both in place, hardwired failover as well as network failover, but I would rather keep things simple and stick to just one. You can read more on topic here: https://support.f5.com/kb/en-us/solutions/public/2000/300/sol2397.html