From Teknologisk videncenter
3 VLANs
3.1 Introducing VLANs
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3.1.2 Types of VLANs
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- Signaling traffic
- Voice traffic
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3.1.3 Switch Port Membership Modes
VLAN Membership Policy Server
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3.1.4 Controlling Broadcast Domains with VLANs
Broadcast domain with no VLAN segmentation
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Controlling broadcast domains with VLANs and Routers Fortæl lidt om hvordan en pakke bliver sendt på tværs af vlans. Med ARP og det hele.
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Controlling broadcast domains with L3 Switches
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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.
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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.
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3.2.3 Trunking Modes
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- 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
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3.3.1 Configura VLANs and Trunks Overview
Configura VLANs and Trunks Overview
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3.3.3 Manging VLANs
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Show interface swithcport
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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
Configura an 802.1Q Trunk - Topology
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Configura an 802.1Q Trunk - Commands
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3.4.1 Common Problems with Trunks
Common problems with trunks
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Nativ VLAN mismatch - Nativ vlan on S3 = 100
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Incorrect VLAN list - VLAN 20 is not allowed on F0/3 on S1
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Incorrect VLAN and Subnet
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3.6.1 Chapter Summary
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