My router 877 has 4-port switch. Interfaces fa0 to fa3 has the same settings no ip address no cdp enable
and VLAN 1 has interface Vlan1 description $ETH-SW-LAUNCH$$INTF-INFO-HWIC 4ESW$$ES_LAN$$FW_INSIDE$ ip address 192.168.1.1 255.255.255.0 ip nat inside ip virtual-reassembly ip route-cache flow ip tcp adjust-mss 1452
My two PCs connecting fa 0 and fa 1 have ip 192.168.1.2 and 192.168.1.3 ( from DHCP of this router ). These two PCs can ping 192.168.1.1, can go to the Internet but they can not see each other.
There is no firewall on either PC or the router.
Any advice is greatly appreciated.