Redirect device based on Source IP

Something like below would do, 1 common Irule that can be applied in both your VIP's. Create 2 datagroups with type IP and but the A users subnet in A_Users_Ips and B users subnet in B_Users_Ips.

Req:

• A users alone to access A website
• B users alone to access B website
• A users if access B website, redirect to A website.
• B users if access A website, redirect to B website.

Irule:

when HTTP_REQUEST {
if { [string tolower [HTTP::host]] equals "www.a.com" and (![class match [IP::remote_addr] equals A_Users_Ips]) } { 
HTTP::redirect "https://www.b.com[HTTP:uri]"
log local0. "User [IP::remote_addr] is NOT from A subnet and hence redirected to B website"
} elseif { [string tolower [HTTP::host]] equals "www.b.com" and (![class match [IP::remote_addr] equals B_Users_Ips]) } { 
HTTP::redirect "https://www.a.com[HTTP:uri]"
log local0. "User [IP::remote_addr] is NOT from B subnet and hence redirected to A website"
}
}