Difference between revisions of "CCNA Explorer 3 VLANs"

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|[[Image:ScreenShotNew040.jpg|800px|left|thumb|Verify the VLAN]]
 
|[[Image:ScreenShotNew040.jpg|800px|left|thumb|Verify the VLAN]]
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|[[Image:ScreenShotNew042.jpg|800px|left|thumb|Assign a Switch Port]]
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|[[Image:ScreenShotNew043.jpg|800px|left|thumb|Verify a switch port]]
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===3.3.3 Manging VLANs===
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{|
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|[[Image:ScreenShotNew044.jpg|800px|left|thumb|VLAN command syntax]]
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|[[Image:ScreenShotNew045.jpg|800px|left|thumb|Show VLAN]]
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|[[Image:ScreenShotNew046.jpg|800px|left|thumb|Show VLAN interface]]
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|[[Image:ScreenShotNew047.jpg|800px|left|thumb|Show interface swithcport]]
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|[[Image:ScreenShotNew048.jpg|800px|left|thumb|no switchport access vlan]]
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|Delete vlan with '''no vlan ''vlan-id''''' or '''delete flash:vlan.dat'''
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===3.3.4 Configura a trunk===
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|[[Image:ScreenShotNew049.jpg|800px|left|thumb|Configura an 802.1Q Trunk - Topology]]
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|[[Image:ScreenShotNew050.jpg|800px|left|thumb|Configura an 802.1Q Trunk - Commands]]
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|[[Image:ScreenShotNew051.jpg|800px|left|thumb|Verify trunks]]
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|[[Image:ScreenShotNew052.jpg|800px|left|thumb|Allow VLANs]]
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===3.4.1 Common Problems with Trunks===
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{|
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|[[Image:ScreenShotNew053.jpg|800px|left|thumb|Common problems with trunks]]
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|[[Image:ScreenShotNew054.jpg|800px|left|thumb|Nativ VLAN mismatch - Nativ vlan on S3 = 100]]
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|[[Image:ScreenShotNew055.jpg|800px|left|thumb|Trunk mode mismatch]]
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|[[Image:ScreenShotNew056.jpg|800px|left|thumb|Incorrect VLAN list - VLAN 20 is not allowed on F0/3 on S1]]
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|[[Image:ScreenShotNew057.jpg|800px|left|thumb|Incorrect VLAN and Subnet]]
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===3.6.1 Chapter Summary===
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{|
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|[[Image:ScreenShotNew058.jpg|800px|left|thumb|Chapter Summary]]
 
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Revision as of 22:58, 22 August 2010

3 VLANs

3.1 Introducing VLANs

Before VLANs
What is a VLAN?
What is a VLAN?
VLAN security
VLAN Characteristics

3.1.2 Types of VLANs

Data VLAN
Default VLAN
Nativ VLAN
Management VLAN
IP Phones in the Network
Inside an IP Phone
Sample Configuration
IP Telephony traffic
  • Signaling traffic
  • Voice traffic

3.1.3 Switch Port Membership Modes

Switch port modes

VLAN Membership Policy Server

Voice port Configuration

3.1.4 Controlling Broadcast Domains with VLANs

Broadcast domain with no VLAN segmentation
Controlling broadcast domains with VLANs and Routers

Fortæl lidt om hvordan en pakke bliver sendt på tværs af vlans. Med ARP og det hele.
Controlling broadcast domains with L3 Switches

3.2 VLAN Trunking

3.2.1 VLAN Trunks

Definition of a trunk: A trunk is a point-to-point link between two network devices that carries more than one VLAN.
VLAN Trunks
Without VLAN Trunks
With VLAN Trunks
802.1Q Tag Field
3 bits of user priority - Used by the 802.1p standard, which specifies how to provide expedited transmission of Layer 2 frames.

1 bit of Canonical Format Identifier (CFI) - Enables Token Ring frames to be carried across Ethernet links easily.
12 bits of VLAN ID (VID) - VLAN identification numbers; supports up to 4096 VLAN IDs.

Nativ VLAN
Nativ VLAN Configuration

3.2.3 Trunking Modes

DTP port configuration
DTP port configuration
  • On Sender DTP frames og bliver i trunk mode
  • Dynamic Auto Sender DTP frames, men foreslår ikke trunking
  • Dynamic desirable Sender DTP frames, og vil gerne trunke
  • Off Sender ikke DTP frames, bruges mod ikke-Cisco udstyr

3.3.1 Configura VLANs and Trunks Overview

Configura VLANs and Trunks Overview
Add a VLAN
Verify the VLAN
Assign a Switch Port
Verify a switch port

3.3.3 Manging VLANs

VLAN command syntax
Show VLAN
Show VLAN interface
Show interface swithcport
no switchport access vlan
Delete vlan with no vlan vlan-id or delete flash:vlan.dat

3.3.4 Configura a trunk

Configura an 802.1Q Trunk - Topology
Configura an 802.1Q Trunk - Commands
Verify trunks
Allow VLANs

3.4.1 Common Problems with Trunks

Common problems with trunks
Nativ VLAN mismatch - Nativ vlan on S3 = 100
Trunk mode mismatch
Incorrect VLAN list - VLAN 20 is not allowed on F0/3 on S1
Incorrect VLAN and Subnet

3.6.1 Chapter Summary

Chapter Summary
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