ASA Load-Balancing intriguing question

Question

I have a setup where the inside interface may be in the same private subnet, but the outside interfaces, are most likely in different public subnets.
For example. inside on both ASA: 192.168.1.1 and 192.168.1.2 /24 and the public connected even to two different ISPs.
My guess is that I would probably lose the possibility for failover of the master for load-balancing, in case this ASA goes down, but nevertheless, I would be still interested in that users connect to the same public ip, and that the master gives the fqdn of the other ASA, and balance their Anyconnect entry into the network between both ASAs. Does this works this way?
I mean, does this vpn load-balance feature talks only accross the inside network, or it needs to have same outside subnet mask? Is it a trick of the mask in the interface? 
If not, is there a way around that? like this, if use a bogus outside interface and tunnel it somehow to the other outside in the other ASA, will still the offering of fqdn be on, so that the client connects to the other "real" public IP? 

Answer 1

you cant route based on source ip with firewall only with router possiable by PBR
you can make to static routes each one point to deffrent router with deffrent metric
in this case it will make the topology like active standby which not good in your case
but you can use sub interfaces on your ASA intis case make each subinterface in deffrent subnet and deffrent security level
and let each subinterface use deffrent hsrp instance
or there is another way
IF you dont use VPN on your ASA u can achive it by useing multiple context
in multiple context you gonna separate your firewall virtualy
so if you have two vlans in your inside network (two deffrent subnets)
then each subnet will use deffrent firewall virtually
u goona divide the internal interface to two subinterfaces
and you can use one outside interface shred between the context or also separate it to two subinterfaces
and allocate those interface to each context
so you gonna deal with each context as deffrent firewall
and you can use deffrent HSRP instance on each context
but with multiple context you cant use VPN on the firewall
*****use the following method*****
THE OTHER WAY WHICH ALSO I SUGIST YOU TO TRY IT WHICH IS THE Transparent Firewall
in the case your firewall will operate in L2 mode
so you can use the routers HSRP IPS AS there is no firewall in the path
which i thnk helpful in you case aslo
in transperante mode the defaultgate way for your client will be the hsrp IP because the firewall will not have any IPs exept for managment
also the useres will be in the same IP subnet as the gateway in your case HSRP VIP
and also you can control the network security through the firewall normally
try this way and let me know
see the following link for configuration
http://www.cisco.com/en/US/products/hw/vpndevc/ps2030/products_configuration_example09186a008089f467.shtml
please, Rate if helpful