Transcript Explain the Role of VLANs in a Converged Network

VLANs
LAN Switching and Wireless – Chapter 3
ITE I Chapter 6
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Objectives

Explain the role of VLANs in a converged network.

Explain the role of trunking VLANs in a converged
network.

Configure VLANs on the switches in a converged
network topology.

Troubleshoot the common software or hardware
misconfigurations associated with VLANs on switches
in a converged network topology.
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Explain the Role of VLANs in a
Converged Network
 Explain the role of VLANs in a converged network
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Explain the Role of VLANs in a
Converged Network
 Describe the different types VLANs
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Explain the Role of VLANs in a
Converged Network
 Describe the VLAN port membership modes
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Explain the Role of VLANs in a
Converged Network
 Describe how to manage broadcast domains with
VLANs
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Explain the Role of VLANs in a
Converged Network
 A switch virtual interface (SVI) is a VLAN of switch
ports represented by one interface to a routing or
bridging system.
 There is one-to-one mapping between a VLAN and
SVI, thus only a single SVI can be mapped to a VLAN.
 In default setting, an SVI is created for the default
VLAN (VLAN1) to permit remote switch administration.
 An SVI cannot be activated unless associated with a
physical port.
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Explain the Role of VLANs in a
Converged Network
•SVIs are generally configured for a VLAN for the following
reasons:
•Allow traffic to be routed between VLANs by providing a
default gateway for the VLAN.
•Provide fallback bridging (if required for non-routable
protocols).
•Provide Layer 3 IP connectivity to the switch.
•Support bridging configurations and routing protocol.
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Explain the Role of Trunking VLANs in a
Converged Network
 Explain the role of a trunk when using multiple VLANs
in a converged network
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Explain the Role of Trunking VLANs in a
Converged Network
 Describe how a trunk works
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Explain the Role of Trunking VLANs in a
Converged Network
 Describe the switch port trunking modes
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Switchport mode dynamic auto
 This command makes the interface willing to convert
the link to a trunk link if the neighboring interface is set
to trunk or desirable mode. Otherwise, the link will
become a non-trunking link.
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Configure VLANs on the Switches in a
Converged Network Topology
 Describe the steps to configure trunks and VLANs
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Configure VLANs on the Switches in a
Converged Network Topology
 Describe the Cisco IOS commands used to create a
VLAN on a Cisco Catalyst switch
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Configure VLANs on the Switches in a
Converged Network Topology
 Describe the Cisco IOS commands used to manage
VLANs on a Cisco Catalyst switch
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Configure VLANs on the Switches in a
Converged Network Topology
 Describe the Cisco IOS commands used to create a
trunk on a Cisco Catalyst switch
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Troubleshoot Common Software or Hardware
Misconfigurations Associated with VLANs
 Describe the common problems with VLANs and trunks
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Troubleshoot Common Software or Hardware
Misconfigurations Associated with VLANs
 Describe the common problems with VLANs and trunks
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Troubleshoot Common Software or Hardware
Misconfigurations Associated with VLANs
 Describe how to use the troubleshooting procedure to
fix a common problem with VLAN configurations
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Summary
 VLANS
Allows an administrator to logically group devices
that act as their own network
Are used to segment broadcast domains
Some benefits of VLANs include
Cost reduction, security, higher performance,
better management
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Summary
 Types of Traffic on a VLAN include
Data
Voice
Network protocol
Network management
 Communication between different VLANs requires the
use of
Routers
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Summary
 Trunks
A common conduit used by multiple VLANS for
intra-VLAN communication
 EEE 802.1Q
The standard trunking protocol
Uses frame tagging to identify the VLAN to which a
frame belongs
Does not tag native VLAN traffic
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Module 3 VLANS
END
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