Does this config have the potential problems?

[JeffPeng]

Hello list,
 
The servers in our IDC are connected to two ISPs,given the ISPs' name are TEL and CNC.
All the OS are RedHat Linux AS4.For RealServer,they have two ethernet interfaces.Before the LVS NAT go online,one interface was connected to TEL link,another was connected to CNC link.
Now we run the LVS NAT for both TEL and CNC links.So the RealServers would change to use private IPs.
Given the logic structure below (Please view this message under HTML form):
 
 
TEL LVS                                       CNC LVS
--------------------------                  ----------------------------
rip: 59.32.232.1                             rip: 221.5.57.1             
vip: 59.32.232.2                             vip: 221.5.57.2
private_ip:192.168.1.1                       private_ip:192.168.2.1
nat_route_ip:192.168.1.2                     nat_route_ip:192.168.2.2
--------------------------                  ----------------------------
    |                                            |
    |                                            |
    |                                            |
    |                 Switch for both LAN        |
-------------------------------------------------------------------------------------
This is the same swith,both 192.168.1.x/24 and 192.168.2.x/24 are connected to it.
-------------------------------------------------------------------------------------
    |        |           |        |                |        |            |       |
    |        |           |        |                |        |            |       |
    |        |           |        |                |        |            |       |
    |1.3     |2.3        |1.4     |2.4             |1.5     |2.5         |1.x    |2.x      
-----------------       ----------------         ----------------       ---------------
  RealServer01            RealServer02             RealServer03           more others
-----------------       ----------------         ----------------       ---------------
 
 
 
On RealServers we do the Policy Route using Linux's rt_tables.It means,for example,the requests' data packages are coming from eth0 into the OS,then it will go back out from eth0.The same if the data packages are coming from eth1 into the OS,it will go back out from eth1.
(If we don't do the Policy Route,then all the return packages will go back from the default gateway,maybe via eth0 or eth1,but not both.)
 
My question is,here both LANs are connected to the same switch,is it reasonable?Will it make some network conflict?
Thanks for all.