Forum Discussion

Cirrus

Jan 10, 2023

Using 2 Floating IP in the same VLAN for 2 different F5 HA Pairs

For example I want to use only 1 VLAN for the data traffic of 2 different F5 HA Pairs.

That would leave me with
HA Pair #1, 1 floating, 2 local selfIP
HA Pair #2, 1 floating, 2 local selfIP

I am using SNAT automap for both HA pairs, would the translation of addresses consider the floating IP of the other HA pair or would it focus on the floating IP on its devices?

Would it have any adverse effect on the traffic?

Example for clarity only: Subnet 10.0.0.0/24
HA PAIR #1, floating -10.0.0.2 , selfIP 10.0.0.3 and 10.0.0.4
GW: 10.0.0.1

HA PAIR #2, floating -10.0.0.5, selfIP 10.0.0.6 and 10.0.0.7
GW: 10.0.0.1

mpl

mihaic
Jan 10, 2023
It will use the floating IP or self IP of the devices in the HA pair.

The SNAT Automap feature selects a translation address from the available self IP address in the following order of preference:

Floating self IP addresses on the egress VLAN

Floating self IP addresses on different VLANs

Non-floating self IP addresses on the egress VLAN

Non-floating self IP addresses on different VLANs

https://support.f5.com/csp/article/K7336

mihaic
MVP
Jan 10, 2023
It will use the floating IP or self IP of the devices in the HA pair.

The SNAT Automap feature selects a translation address from the available self IP address in the following order of preference:

Floating self IP addresses on the egress VLAN

Floating self IP addresses on different VLANs

Non-floating self IP addresses on the egress VLAN

Non-floating self IP addresses on different VLANs

https://support.f5.com/csp/article/K7336
- Leslie_Hubertus
  Ret. Employee
  Jan 18, 2023
  Looks like this is the answer teemo_13 needed, so I'm going to mark it as the Accepted Solution for you mihaic.
Mohamed_Salah_
MVP
Jan 10, 2023
Hello,

Regarding your questions "

"Would the translation of addresses consider the floating IP of the other HA pair or would it focus on the floating IP on its devices? Would it have any adverse effect on the traffic?"

what is the relation between the two HA pairs?

As far as I understand each pair is working independently, and the virtual server will make address translation based on the natting option in the virtual server configuration and as mihaic mentioned.