Hi there, 

we have the following scenario and I don't get it done to get internet connection in my VLAN network. I already saw some threads for this topic, but I don't know if there was a scenario like mine and I don't get the error.

Router is a FritzBox (172.16.1.1) -- (no hate please ;-) but we need it currently for DECT-Phones) 

Fritzbox is connected to a TL-SG1428PE

TL-SG1425PE (172.16.1.15) is connected (with SFP/Fibre) to T2600G-28TS (172.16.1.10/192.168.20.1)

Computer is connected with T2600G-28TS

I setup tagged VLAN 20 on both switches on the uplink ports additionally to VLAN1. Port of Computer is untagged with VLAN20 and PVID of the Computer-Port is also VLAN20. VLAN20 has Interface 192.168.20.1

I added a static route according to FAQ and some other How-Tos in T2600G (it is also our DHCP-Server):

Destination 172.16.0.0/255.255.0.0

Next Hop: 192.168.20.1

When I enter manually an IP Adress 192.168.20.2 I can ping 192.168.20.1, the T2600G and also the web interface of the switch is reachable.

But I cannot ping 172.16.1.1 - I don't get a connection, target network not reachable. And therefore I have no internet connection in VLAN 20.

Reason why we want to setup a VLAN is for creating Guest WiFis, we have some Unifi-APs for this. 

Where is my error? Is a router instead of the FritzBox necessary which is able to handle VLAN?

Thankx & BR

Roland