Summary chapter 5

Chapter 5: Inter-VLAN Routing
5.1 Inter-VLAN Routing Configuration

Inter-VLAN Routing operation
What is inter-VLAN Routing?
VLANs segment switched networks. Catalyst switches support over 4,000 VLANs. But layer 2 switches
have very limited IPv4 and IPv6 functionality and cannot perform the function of routers.

A VLAN is a broadcast domain, hosts on separate VLANs are unable to communicate without
intervention of a Layer 3 routing device (Router or Multi-layer switch). Regardless of the device, the
process of forwarding traffic from one VLAN to another VLAN is known as inter-VLAN routing

Legacy Inter-VLAN Routing
Zie animatie netacad

PC 1 (VLAN 10) Communicates with PC3 (VLAN 30)

PC1 Unicast destined for PC3 to S2

S2TrunkS1

S1(F0/3)UnicastR1(G0/0)

R1(G0/1)Unicast S1(F0/4)

S1TrunkS2

S2UnicastPC3