LAN Desgn, VLANs, Troubleshooting

Collision domains

Broadcast Domains

Campus LAN Topologies

Physical Standerds

VLANs

Configuring VLAns

broken up by bridges / swithes

CSMA CD/CA

broken up by routers

becuase routers dont forward eythernet frames

VLANs

boradcast domained created by configuration

switch port ascess vlan 2

switch forwarding access can't forward between vlans (even on same switch)

Two teir

Acess swithc layer

distribution switch layer

Three tire

additional core

saves on switch ports & cables in larger deisns

aggregates distribution swithces

image

Wireless LAN Standerds

wireless controllers

CAPAP - control and provisioning of wirleless access points (protocol)

a single switch can create multiple boradcast domains

ports in each vlan treated completly differently

reduced cpu ovrhead

multi switch vlans

trunking

vlan tagging

frames accocaited with set Vlan

forwarding frames between vlans on SAME swithc =
get both switches to connect to a router using trunk

ROAS

show vlan brief

vlan 15

name name

switchport mode access / trunk

Vlan turnking protocol

VTP mode on / off

Types of trunking - ISO or ISEEE

POrt types

access

trunk

deynamic desiable

dynamic auto

show interfaces trunk / switchport