iRule SNAT for multiple ISP

Hi Nicolas,

If you have to deal with multiple customes you may wanna take a look to the traffic-group feature. It will enable you to configure a virtual router for each customer. In this case each customer would have its own routing table and static SNAT settings. And no iRules needed then...

https://support.f5.com/kb/en-us/products/big-ip_ltm/manuals/product/bigip_redundant_systems_config_11_0_0/6.html

If multiple traffic groups are not an option for you, then the outline technique of my last responce would remain nearly the same. Designate one customer as default route and SNAT and then overwrite the nexthop and SNAT based on different source addresses. The iRules would then look like this...

when CLIENT_ACCEPTED { 
    log local0. "VS Reached"
    if { ( [IP::addr [IP::client_addr] 10.32.1.192/26] ) or 
         ( [IP::addr [IP::client_addr] equals 10.32.2.0/26] ) } then {
        snat X.X.X.203
        nexthop X.X.X.201 
        log local0. " -- SNAT CUSTOMER2 -- "
    } elseif { ( [IP::addr [IP::client_addr] 10.32.3.192/26] ) or 
         ( [IP::addr [IP::client_addr] equals 10.32.4.0/26] ) } then {
        snat X.X.X.103
        nexthop X.X.X.101
        log local0. " -- SNAT CUSTOMER3 -- "
    } elseif { ( [IP::addr [IP::client_addr] 10.32.5.192/26] ) or 
         ( [IP::addr [IP::client_addr] equals 10.32.6.0/26] ) } then {
        snat X.X.X.13
        nexthop X.X.X.11
        log local0. " -- SNAT CUSTOMER4 -- "
    } else {
        log local0. " -- SNAT DEFAULT -- " 
    } 
}

Cheers, Kai