Lab - Implement Inter-VLAN Routing
Part 1: Build the Network and Configure Basic Device Settings
Part 2: Create VLANs and Assign Switch Ports
Part 3: Configure an 802.1Q Trunk between the Switches
Part 4: Configure Inter-VLAN Routing on the Router Part
5: Verify Inter-VLAN Routing is working
Background / Scenario
Modern switches use virtual local-area networks (VLANs) to improve network performance by separating
large Layer 2 broadcast domains into smaller ones. VLANs can also be used as a security measure by
separating sensitive data traffic from the rest of the network. In general, VLANs make it easier to design a
network to support the goals of an organization. Communication between VLANs requires a device
operating at Layer 3 of the OSI model. Adding an inter-VLAN router allows the organization to segregate
and separate broadcast domains while simultaneously allowing them to communicate with each other.
VLAN trunks are used to span VLANs across multiple devices. Trunks allow the traffic from multiple VLANs to
travel over a single link, while keeping the VLAN identification and segmentation intact. A particular kind of
inter-VLAN routing, called “Router-on-a-Stick”, uses a trunk from the router to the switch to enable all VLANs
to pass to the router.
In this lab, you will create VLANs on both switches in the topology, assign VLANs to switch access ports,
verify that VLANs are working as expected, create VLAN trunks between the two switches and between S1
and R1, and configure Inter-VLAN routing on R1 to allow hosts in different VLANs to communicate,
regardless of which subnet the host resides.