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I have an L2 switch with multiple vlans, lets say 1,2 and 3. I configured the uplink port-25 as 802.1q trunk so that all vlans are added as tagged. No problem so far. I want to connect this vlan uplink trunk port to a cisco router port. The Cisco port is configured with an ip-address and subnet mask of vlan 1. The same port is also configured with and two subports for vlan 2 and vlan 3 subnets and masks. &nbsp;Do I need any special vlan config commands for the Cisco port connection? 
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I have an L2 switch with multiple vlans, lets say 1,2 and 3. I configured the uplink port-25 as 802.1q trunk so that all vlans are added as tagged. No problem so far. I want to connect this vlan uplink trunk port to a cisco router port. The Cisco port is configured with an ip-address and subnet mask of vlan 1. The same port is also configured with and two subports for vlan 2 and vlan 3 subnets and masks.  Do I need any special vlan config commands for the Cisco port connection? 

Does Cisco Router port need special VLAN entires when 802.1q VLAN trunk is connected?

A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.

Routers

A switch is a device that filters and forwards packets of data between LAN segments. Switches operate at the data link layer or the network layer of the Open Systems Interconnection (OSI) Reference Model and therefore support any packet protocol. LANs that use switches to join segments are called switched LANs or, in the case of Ethernet networks, switched Ethernet LANs. A hub is a connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports; when a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.