On the 2950 switch configure two VLANs. Assign a port to one of the VLANs for the 192.168.1 network and assign another port to the other VLAN for the 172.16.1 network. Then configure a third port on the switch as a trunk port and connect it to the router. Configure the FastEthernet interface on the router for trunking. Configure one subinterface to process the VLAN for the 192.168.1 network and configure another subinterface to process the VLAN for the 172.16.1 network.
On the 2950 switch configure two VLANs. Assign a port to one of the VLANs for the 192.168.1 network and assign another port to the other VLAN for the 172.16.1 network. Then configure a third port on the switch as a trunk port and connect it to the router. Configure the FastEthernet interface on the router for trunking. Configure one subinterface to process the VLAN for the 192.168.1 network and configure another subinterface to process the VLAN for the 172.16.1 network.
I suspect that it is an issue with the feature set of the code that you are running. I checked the feature navigator on CCO and it shows that dot1q VLAN encapsulation is supported for 2620 in 12.1(5)T8 with the PLUS feature set but is not supported with the IP feature set.
It looks like that with the code that you are running you will not be able to implement this. Is it feasible to consider an upgrade to the code?
To change from one feature set to another feature set requires purchase of a license for the code upgrade. If you purchase the feature set license then you should be able to get a copy of the code that does support this.
HTH
Rick
HTH
Rick
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