Summary: The network interface of sun Fire V440 can't work correctly

thanks for the people who replied, especially for Darren Dunham, Charles Rawls,Russell_C_Page@national.com.au,Adrian Cole, and so on. You can get the answer from the email of Darren Dunham as the following:
> > 
> > Dear all,
> >         I have setup a brand new sun fire v440 system, with the os solaris 8 07/03. Then  I  added the path 8_Recommended in it.
> >       There two built-in  network interfaces on  the system.  But only one network interface can connect with other system with the ping utility.
> >  
> > details of the system configuration:
> > os : solaris 8 07/03
> > patch:   8_Recommended 
> > 
> > #cat  /etc/hosts
> > 127.0.0.1   localhost
> > 192.168.92.8   loghost   oracleserver  abc.com
> > 192.168.92.6   loracleserver1
> > 
> > #cat /etc/hostname.ce0
> > oracleserver
> > 
> > #cat /etc/hostname.ce1
> > oracleserver1
> >
> > #cat /etc/netmasks
> > 192.168.92.0  255.255.254.0
> 
> 
> 
> > ok>printenv local-mac-address?
> >       local-mac-address? = true
> >   if both the ce0 and ce1 is running, only the ce0 interface can ping another host(192.168.92.1). if let the ce0 down, then the ce1 interface can ping another host(192.168.92.1). 
> 
> You have 2 separate interfaces on the same subnet.  That is not
> supported the way you have it.  Since all outbound packets are routed
> via a routing table, outbound packets choose one interface.
> 
> You can use IP Multipathing to have both interfaces active and available
> for failover.
> 
> 
> 
> -- 
> Darren Dunham                                           ddunham@taos.com
> Senior Technical Consultant         TAOS            http://www.taos.com/
> Got some Dr Pepper?                           San Francisco, CA bay area
>          < This line left intentionally blank to confuse you. >
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