routing in debian

[Khanh Cao Van <cvkhanh@gmail.com>]

I have 2 PC A and B  ,

The A has 2 ethernet card call eth0 ( IP 10.0.0.4/24 )  and eth1 (
192.168.60.2/24 ) . I have enable fowarding between those 2 ethernet :
cvkhanh:/etc/network# cat options
ip_forward=yes

The B has one ethernet card eth0 ( 192.168.60.4/24 ) and the default
gateway is 192.168.60.2 ( the eth1 of A ) .

In A I set route table as :

Kernel IP routing table
Destination     Gateway             Genmask            Flags Metric
Ref    Use Iface
10.0.0.0             0.0.0.0             255.255.255.0     U        0 
    0        0 eth0
192.168.60.0    192.168.60.2    255.255.255.0       UG      0      0  
     0 eth1
192.168.60.0    0.0.0.0              255.255.255.0      U        0    
 0        0 eth1
default              10.0.0.2            0.0.0.0               UG    
0      0        0 eth0

But when I tried with A :
ping -I eth0 192.168.60.4 , B not answer .

Tried with B :
ping 10.0.0.4 , it reply immediatly .

I could not find out why ping -I eth0 192.168.60.4 , B not reply ,
please , help me





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Cao Van Khanh