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Rajesh_07_16489's avatar
Rajesh_07_16489
Icon for Nimbostratus rankNimbostratus
Jan 14, 2015

HA pair

Would you please help me to know following pointers as I am new to HA of f5

 

Scenario is that F5 has both internal and external facing VLANs and has dedicated VLAN for HA pair too,

 

What IP ( self IP of active one or Floating IP)will be used when we enable SNAT auto ? What is the role of having floating IP at External VLAN and in which scenario, it’s used? What IP f5 (self IP of active one or Floating IP) uses to probe servers health check? What are all objects will be failover to passive device when active one will be down ? When we do sync in active appliance, is that all configurations replicated to standby appliance or still we have some objects or configurations, which will not be replicated to standby appliance.

 

I am sorry as I added too many doubts over here :)

 

Thanking you in advance

 

3 Replies

  • nathe's avatar
    nathe
    Icon for Cirrocumulus rankCirrocumulus

    What IP ( self IP of active one or Floating IP)will be used when we enable SNAT auto ? if you've got configured floating IPs it will prioritise the floating IP of the egress interface, then any other floating IP before using the non-floating IPs. See https://support.f5.com/kb/en-us/solutions/public/7000/300/sol7336.html

     

    What is the role of having floating IP at External VLAN and in which scenario, it’s used? - Sometimes you might need a route pointing to your bigips from an upstream device. this is when you may use this.

     

    What IP f5 (self IP of active one or Floating IP) uses to probe servers health check? Non-floating self IPs on both bigips in a pair.

     

    What are all objects will be failover to passive device when active one will be down ? Listener objects like Virtual Servers/Addresses etc..

     

    When we do sync in active appliance, is that all configurations replicated to standby appliance or still we have some objects or configurations, which will not be replicated to standby appliance? Most configuration is synced except for configuration which is bigip specific like non-floating self ips.

     

    Hope this helps,

     

    N

     

    • nathe's avatar
      nathe
      Icon for Cirrocumulus rankCirrocumulus
      No problem at all. Glad to help