Hi, I have ping problem and can not figure out. I have 4 switches, 2x 3550,2x2950. They are connected with each with 2 cables. They all have a  intel vlan 1S1 172.16.1.3S2 172.16.1.4S3 172.16.1.103 S4 172.16.1.104 I can ping all in any switch.I can p...