IPMP Source Address & Interface selection

Hi All,

We have X86 Machine with Solaris 10 U9 with IPMP, where 2 interfaces are configured in IPMP group IPMP-01. Each of these interfaces are configured with Data address and marked UP & broadcasting. Both interfaces are in same subnet as showb below :-

igb0    = 10.9.73.20

nxge0 = 10.9.73.21

There are 2 machines CCN1 (10.9.78.137) & CCN2 (10.9.78.138) which are communicating with above X86 machine using IP 10.9.73.20

Now when X86 machines replies to CCN1 it is using Source IP as 10.9.73.20 & destination interface as igb0.

        when X86 machines replies to CCN2 it is using Source IP as 10.9.73.20 & destination interface as nxge0.

Above Source IP & interface selection combination remains same & even after system reboot.