i hav got Cisco PIX, one of my interface ip address on this is 172.16.0.254, this pix is connected to the core switch which is 3COM switch layer 3, it has got 2 ip address 172.16.0.100 & 192.168.200.1.
i had given route to reach 192.168.200.0/24 via 172.16.0.100, with this PIX could able to ping 192.168.200.1, which is nothing but the ip address of 3COM switch.
route inside 192.168.200.0 255.255.255.0 172.16.0.100
3COM default gateway IP address is 172.16.0.254
my PC ip address is 172.16.0.82, gateway is 172.16.0.254, with this i can't ping 192.168.200.1, where as if i set my gateway ip address as 172.16.0.100, i could able to ping, no access-list nothing configured on 3COM as well as on Cisco PIX for 172.16.0.0 & 192.168.200.0 network.
my question is, if PIX could able to reach 192.168.200.1, then why not my PC which is having the PIX ip address as gateway couldn't reach?