What to do when the balancer is not enough?

Question

Nginx

The question is still theoretical, for me. But it got interesting.
What to do when the power of the balancer is not enough?
Typical layout for most
load balancer applications
|
--------------------------------
app server | app server
If the load balancer has already reached the limit (and it's cool tuned), do dns balancing by adding load balancers?

Answer 1

Yes. the next step is dns.

Answer 2

Well, no one makes one balancer. And they usually scale well.

Answer 3

as an option to do balancing below the level according to the OSI model .. unless of course the application will work in this version

Answer 4

if in one DC and it's not F5 or a similar balancer - LVS, you can steer from routers, in short, whoever is in what much