-------
|schemma|
 -------
                  -1.1.1.1-----outisde-main-VPN------1.1.1.2--
192.168.1.0---ASA1                                            ASA2--192.168.16.0
                  -2.2.2.1------outside-backup-VPN---2.2.2.2--


I see that routes work fine, I mean, when outside-main connection goes down
and I do  "sho run" I see that routes change in a correct way to outside-backup. But
VPN doesn't care about what routes say, I mean, if I disconnect outside-main
traffic goes through outside-backup, but next, when I connect again outside-main
altough the "sho route" says, go through outside-main again, the traffic keeps in outside-backup.



ASA2 (5505) configuration:
--------------------------

 --------
|Routing:|
 --------

route outside-main   192.168.1.0 255.255.255.0 1.1.1.1 1 track 1
route outside-backup 192.168.1.0 255.255.255.0 2.2.2.1 254
!
track 1 rtr 1 reachability
sla monitor 1
 type echo protocol ipIcmpEcho 1.1.1.1 interface outside-main
 num-packets 3
 frequency 10
sla monitor schedule 1 life forever start-time now


 ------
|IPsec:|
 ------

access-list outside-main_1_cryptomap   extended permit ip 192.168.16.0 255.255.255.0 192.168.1.0 255.255.255.0
access-list outside-backup_1_cryptomap extended permit ip 192.168.16.0 255.255.255.0 192.168.1.0 255.255.255.0


crypto ipsec transform-set ESP-3DES-SHA esp-3des esp-sha-hmac
crypto map outside-main_map 1 match address outside-main_1_cryptomap
crypto map outside-main_map 1 set pfs group1
crypto map outside-main_map 1 set peer 1.1.1.1
crypto map outside-main_map 1 set transform-set ESP-3DES-SHA
crypto map outside-main_map interface outside-main
crypto map outside-backup_map 1 match address outside-backup_1_cryptomap
crypto map outside-backup_map 1 set pfs group1
crypto map outside-backup_map 1 set peer 2.2.2.1
crypto map outside-backup_map 1 set transform-set ESP-3DES-SHA
crypto map outside-backup_map interface outside-backup
crypto isakmp enable outside-main
crypto isakmp enable outside-backup
crypto isakmp policy 10
 authentication pre-share
 encryption 3des
 hash sha
 group 2
 lifetime 120
!