default_backend

Specify the backend to use when no "use_backend" rule has been matched. May be used in sections :

defaults frontend listen backend yes yes yes yes yes yes no no Arguments : <backend> is the name of the backend to use. When doing content-switching between frontend and backends using the "use_backend" keyword, it is often useful to indicate which backend will be used when no rule has matched. It generally is the dynamic backend which will catch all undetermined requests.

Example :

use_backend     dynamic  if  url_dyn
use_backend     static   if  url_css url_img extension_img
default_backend dynamic

See also : "use_backend"