For Vlan control: PC IP: 172.1.100.x/24 and Gateway: 172.1.100.254
For Vlan amp: PC IP: 172.1.101.x/24 and Gateway: 172.1.101.1
For Vlan com: PC IP: 172.1.105.x/24 and Gateway: 172.1.105.1
You can try to ping the switch vlan IPs from each machine. Based on your configuration it should work.
If you cannot ping from machines to machines I believe the windows firewall is blocking ICMP traffic. You can add a rule to the windows firewall to allow ingress ICMP traffic.
- the default gateway on the machine in Vlan Control is set to 172.1.100.254 ?
- the default gateway on the machines in Vlan Amp/Com is set to 172.1.101.1 / 172.1.105.1 respectively?
- the target machines aren't running Windows in default firewall mode that kills pings?
- does a traceroute give any hints?
Sorry if you already checked all that, but I've been bitten by one of these things more times than I care to admit 😉