ACE Redirect. Configuration Problem?

Question

Hi,
I´m configuring Redirect in ACE 4710 and it doesn´t work fine. The client has two real servers and he wants redirect the traffic when both real servers are down.
They have other server with static content (http) for redirect the trafic.
The configuration is  (complete configuration is attached):
rserver host Backup_Rserver
  ip address 192.168.0.212
  inservice
rserver host achs-tamw01
  ip address 192.168.0.217
  inservice
rserver host achs-tamw02
  ip address 192.168.0.205
  inservice
rserver host achs-tamw03
  ip address 192.168.0.203
  inservice
serverfarm host SF_Backup
  rserver Backup_Rserver 80
    inservice
serverfarm host TAMW_80
  predictor leastconns
  probe PROBE_TAMW:80
  rserver achs-tamw01 80
    inservice
  rserver achs-tamw02 80
    inservice
  rserver achs-tamw03 80
    inservice
sticky ip-netmask 255.255.255.255 address source TAMW_80_STICKY
  replicate sticky
  serverfarm TAMW_80 backup SF_Backup
policy-map type loadbalance first-match VIP-POLICY-TAMW_80
  class class-default
   sticky-serverfarm TAMW_80_STICKY
policy-map multi-match LB-VIP
  class VIP_TAMW_80
    loadbalance vip inservice
    loadbalance policy VIP-POLICY-TAMW_80
    loadbalance vip icmp-reply active
    nat dynamic 1 vlan 10
interface vlan 10
  nat-pool 1 172.16.10.39 172.16.10.39 netmask 255.255.255.255 pat
  service-policy input LB-VIP
When both real servers are down, the VIP remains operational and the backup real servers is operational and I can see statistics increase in this server:
ACE-CC/Contexto_B# sh rserver
rserver              : Backup_Rserver, type: HOST
state                : OPERATIONAL (by default, unverified)
                                                ----------connections-----------
       real                  weight state        current    total              
   ---+---------------------+------+------------+----------+--------------------
   serverfarm: SF_Backup
      192.168.0.212:0       8      OPERATIONAL  4          66                 
In these moment both real servers were down and I could see connections, but when user from Internet o LAN try to connect it can´t see static content.
ACE-CC/Contexto_B# sh service summ
service-policy: LB-VIP
Class                            VIP             Prot  Port        VLAN          State    Curr Conns   Hit Count  Conns Drop
VIP_TAMW_80                      172.16.10.150   tcp   eq 80       1,10           IN-SRVC          21         903          0
VIP remains operational.
Regards,
Jaime

Answer 1

Hi Peter,
I did test only in HTTP mode. In the configurations you can see that I applied a backup server only the port 80:
serverfarm host SF_Backup
   rserver Backup_Rserver 80
    inservice
I didn´t create a SF_Backup_443 because we were testing only with services in HTTP.
I still can´t do labs test, although it seems that configuration is well. 
Regards.
Jaime.