Does TCP failover work with traefik 2.1?

I have been looking for some information about TCP loadbalancing and failover with traefik 2.x. I found some hints and posts on loadbalancing but no one about failover. I couldn't get it working either, loadbalancing works well (round robin), but if one of the backend systems stops working I get errors.
Does Traefik support failover with TCP?
A hint in the documentation might be helpful to others as well :wink:

Many thanks