settings.py

DATABASES = {
   'ldap_srv1': { # router force to this one
       'ENGINE': 'ldapdb.backends.ldap',
       'HOST': "ldap://srv1.corp",
       'USER': "[email protected]",
       'PASSWORD': "pdg@114",
       'BASE_DN': 'DC=srv1,DC=corp',
   },
   'ldap_srv2': {
       'ENGINE': 'ldapdb.backends.ldap',
       'HOST': "ldap://srv2.corp",
       'USER': "[email protected]",
       'PASSWORD': "pdg@114",
       'BASE_DN': 'DC=srv2,DC=corp',
   },
   'ldap_srv3': {
       'ENGINE': 'ldapdb.backends.ldap',
       'HOST': "ldap://srv3.corp",
       'USER': "[email protected]",
       'PASSWORD': "pdg@114",
       'BASE_DN': 'DC=srv3,DC=corp',
   },
}