[NTLUG:Discuss] can't ping to 2 NIC box

[m m]

Hi all:
I have a linux box (say, SA) with 2 NICs, use RH 6.2 os.
etho w/ public IP (64.100.100.100) connect to the network switch.
eth1 w/ non-routeable IP (192.168.0.1) connect to ahother pc (say, SB) w/ IP 
(192.168.0.2).
I have is it physical connected, problems are:
ping from SA to SB, the error message is: destination Host Unreachable
ping from SB to SA, it hang on there.

/etc/hosts on SA has all the hosts information.

any suggestions?

TIA

jc

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