Connecting Interfaces; Using Interface Configuration Mode - Cisco Catalyst 2928 Software Configuration Manual

Chapter 12 Configuring Interface Characteristics

Connecting Interfaces

Devices within a single VLAN can communicate directly through any switch. Ports in different VLANs
cannot exchange data without going through a routing device. In the configuration shown in
when Host A in VLAN 20 sends data to Host B in VLAN 30, the data must go from Host A to the switch,
to the router, back to the switch, and then to Host B.
Figure 12-1

Using Interface Configuration Mode

The switch supports these interface types:
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•
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You can also configure a range of interfaces (see the
page
To configure a physical interface (port), specify the interface type, module number, and switch port number,
and enter interface configuration mode.
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OL-23389-01
Connecting VLANs with Layer 2 Switches
Host A
VLAN 20
Physical ports—switch ports
VLANs—switch virtual interfaces
Port channels—EtherChannel interfaces
12-10).
Type—Fast Ethernet (fastethernet or fa) for 10/100 Mb/s Ethernet, Gigabit Ethernet (gigabitethernet
or gi) for 10/100/1000 Mb/s Ethernet ports or small form-factor pluggable (SFP) module Gigabit
Ethernet interfaces.
Module number—The module or slot number on the switch (always 0 on the Catalyst 2928 switch).
Port number—The interface number on the switch. The port numbers always begin at 1, starting with
the far left port when facing the front of the switch, for example, fastethernet0/1 or
gigabitethernet0/1. If there is more than one interface type (for example, 10/100 ports and SFP
module ports, the port numbers restart with the second interface type: gigabitethernet0/1.For a
switch with 10/100/1000 ports and SFP module ports, SFP module ports are numbered
consecutively following the 10/100/1000 ports.
Cisco router
Switch
Host B
VLAN 30
"Configuring a Range of Interfaces" section on
Catalyst 2928 Switch Software Configuration Guide
Using Interface Configuration Mode
Figure
12-9
12-1,