Switch VLAN division
1. VLAN overview and advantages
1. Split the broadcast domain
Broadcast domain: the collection of all nodes in the network that can receive the same broadcast
a. Physically divide the router to divide the network segment
b. Logically divide through the switch software for division
2. VLAN advantage
control Broadcasting
Enhance network security and
simplify network management
3. Types of VLAN
1. Static VLAN is
divided into static VLAN based on port
2. Dynamic VLAN is
divided into dynamic VLAN based on MAC address
4. The range of static VLAN from
2 to 4094 is available VLAN id
switch according to the connection object Different interface modes can be divided into
a.access access mode One interface can only be divided into one vlan (switch-computer, switch-router except single-arm routing)
b.trunk backbone link mode (switch-switch)
c.hybrid mixed mode (Switch or computer) The
same vlan can only exist in one of the untagged and tagged tables. The
communication between different vlans is realized through single-arm routing and the encapsulation of vlanif of the three-layer switch.