Hi MS Follower,
Not all HLB are supported in the SFB environment, according to the official document, only the following HLBs work with SFB environment:

Details about this you could refer to
Load Balancers.
About how to set up HLB, you could click the link under the vendor in the screenshot I provided to read the deployment document, or you could contact with the device provider, as the setup steps are not same.
Best Regards,
Evan Jiang
Please remember to
mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact
tnsf@microsoft.com.
Click
here to learn more. Visit the dedicated
forum to share, explore and talk to experts about Microsoft Teams.