VLANS

VLANS

1. VLAN Segmentation

   • Overview
     • benefits of vlan
       • Security + Cost reduction + Better performance + Shrink broadcast domains + Improved IT staff efficiency +Simpler project and application management
     • Types of VLAN
       • Data VLAN
       • Default VLAN
       • Native VLAN
       • Management VLAN
     • voice VLAN
   • Mulit-switched environmnet
     • VLAN trunks
     • Controlling Broadcast Domains + VLANs
       • Network without VLANs
       • Network with VLANs
     • Tagging Ethernet Frames for VLAN Identification
       • Type
       • User priority
       • Canonical Format Identifier (CFI)
       • VLAN ID (VID)
     • Native VLANs and 802.1Q Tagging
       • Tagged Frames on the Native VLAN
       • Untagged Frames on the Native VLAN
     • Voice VLAN Tagging

2. VLAN Implemntation

   • VLAN assignment
     • Ranges on catalyst swi
       • Normal Range VLANs
       • Extended Range VLANs
     • Creating VLAN
     • Assigning ports to VLAN
     • Changing VLAN port membership
     • Deleting VLAN
     • Verifying VLAN Info
   • VLAN trunk
     • Configuring IEEE 802.1Q Trunk Links
     • Resetting the Trunk to Default State
     • Verifying Trunk Configuration
   • Dynamic trunking protocol
     • Introduction to DTP
       • Caution
     • Negotiated Interface Modes
       • switchport mode access
       • switchport mode dynamic auto
       • switchport mode dynamic desirable
       • switchport mode trunk
       • switchport nonegotiate
   • troublshooting trank + VLAN
     • IP Addressing Issues with VLAN
     • Missing VLANs
     • Introduction to Troubleshooting Trunks
     • Common Problems with Trunks
       • Native VLAN mismatches
       • Trunk mode mismatches
       • Allowed VLANs on trunks
     • Trunk Mode Mismatches
     • Incorrect VLAN List

3. VLAN Security + design

   • Attacks on VLAN
     • Switch Spoofing Attack
     • Double-Tagging Attack
     • PVLAN Edge

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