Load Balancing Outgoing, its possible ?

[Daniel Dias Gonçalves]

Complicated ? Its possible ?

                                                        TELECOM
                                        LOAD SHARING PER PACKET
------------------------------------------------------------------------------------------
        |         |          |    
                                              |          |        |
        |         |          
|                                                  |          |        |
-------------------------------------           
-------------------------------------
CISCO 2600 (6mbps)                                  HAUWEI (6mbps)
LOAD SHARING PER PACKET               LOAD SHARING PER PACKET
-------------------------------------           
-------------------------------------
              Ethernet (64.XX.XX.1/30)                      Ethernet 
(65.XX.XX.1/30)              
                      |                                                
                        |
                      |                                                
                        |
                      |                                                
                        |
                      |                                                
                        |
              XL0 (64.XX.XX.2/30)                            XL1 
(65.XX.XX.2/30)
------------------------------------------------------------------------------------------
FREEBSD 5.4 + PF
------------------------------------------------------------------------------------------
                   XL2 (192.168.0.254/24, 64.XX.XX.5/30, 65.XX.XX.5/30)
                                                           |
                                                           |
                                               ------------------
                                                     SWITCH        
------------------------------- IP: 65.XX.XX.6/30
                                               ------------------      
                                           GW: 65.XX.XX.5
                                             /                           \
                                           /                               \
                IP: 192.168.0.10/24                          IP: 
64.XX.XX.6/30
               GW: 192.168.0.254                           GW: 64.XX.XX.5
               and more clients ...                             


I need load balancing outgoing traffic from:
192.168.0.0/24 ( NAT )
and 64.XX.XX.0/24, 65.XX.XX.0/24

It is possible to make this balancing with the PF ? Exists some software 
that I make this ? Zebra can help me?
This type of balancing gives to problems with the navigation of the user 
of NAT or IP valid ?
If it is possible, wanted to see examples with rules.

Thanks,

-- 
Daniel Dias Gonçalves
DGNET Network Solutions
daniel at dgnetwork.com.br
(37) 99824809