Cisco WS-C3750-48PS-S Software Configuration Manual page 256

Chapter 11 Configuring Interface Characteristics
Understanding Interface Types
Figure 11-1 Connecting VLANs with Layer 2 Switches
Cisco router
Switch
Host A Host B
VLAN 20 VLAN 30
By using the switch with routing enabled, when you configure VLAN 20 and VLAN 30 each with an
SVI to which an IP address is assigned, packets can be sent from Host A to Host B directly through the
switch with no need for an external router (Figure 11-2).
Figure 11-2 Connecting VLANs with the Catalyst 3750 Switch
Layer 3 switch
with routing enabled
172.20.128.1 SVI 1 SVI 2 172.20.129.1
Host A Host B
VLAN 20 VLAN 30
Catalyst 3750 Switch Software Configuration Guide
11-6
78-16180-02