Try this configuration -
1) firstly I'm pretty sure Reza didn't mean add acl 100 to the the vlan 102 interface.
That acl was for NAT so can you remove it from the interface.
2) you have two vlans but you haven't allocated them on the switch. As Reza says it's not the most important thing but we'll do it anyway. So on your switch -
sw(config)# vlan 101
switch(config-vlan)# name <name> <-- name being whatever you like
sw(config-vlan)# exit
sw(config)# vlan 102
sw(config-vlan)# name <name>
sw(config-vlan)# exit
sw(config)# int <x> <-- whichever port on switch connects to fa2 on router
sw(config-if)# switchport mode access
sw(config-if)# switchport access vlan 102
sw(config-if)# spanning-tree portfast
sw(config-if)# exit
sw(config)# int fa0/3
sw(config-if)# switchport mode access
sw(config-if)# switchport access vlan 101
sw(config-if)# spanning-tree portfast
sw(config-if)# exit
2) On your router -
You need to create a DHCP pool for your 172.16.1.0/24 subnet unless you are statically configuring the clients in which case don't forget the default gateway and DNS servers.
Then you need to modify your configuration so -
no ip nat inside source list 1 interface dialer1 overload
access-list 103 permit ip 10.82.2.0 0.0.0.255 any
access-list 103 permit ip 172.16.1.0 0.0.0.255 any
ip nat inside source list 103 interface Dialer1 overload
The above should get you working to and from the internet.
if you still cannot communicate between the internal subnets then we may need to modify the acl to not do NAT for that traffic.
It depends, i have seen it work both ways.
Jon
