[hcia]no.15 communication between VLANs

Catalog

       Vlan Communication mode between ：

      Vlan Specific configuration of communication between ：

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       Vlan Communication mode between ：

        In practice , We often need to be different Vlan Realize connectivity , The main methods can be ：

        Multi arm routing ： Provided by multiple interfaces of the router VLAN Communication scheme between , The principle and routing basis are the same .

        Single arm routing ： Compared with the multi arm routing scheme, the router interface can be saved ; however , One arm routing follows VLAN An increase in quantity , The bandwidth pressure of the link will also increase .

       Three layer exchange ： Through the layer 3 switch Vlanif Interface realizes three-layer data communication ; Compared with the single arm routing scheme , Layer 3 switching is more scalable , Even if VLAN The increase will not have a great impact on its performance .     

      Vlan Specific configuration of communication between ：

​      1. Multi arm routing .   

    （1） On the switch , First create Vlan10 and Vlan20, And then G2,G3 configure access Pattern ,G0,G4 configure access or trunk All possible .

    （2） On the router , Configure the IP.

      

      2. Single arm routing .

     （1） On the switch , Create good Vlan10 and 20 after , Will connect PC Interface configuration for access Pattern , Interface configuration of connection route trunk Pattern .

      （2） The router interface configuration is as follows ：

     3. Three layer exchange .

      The switch interface configuration is as above , Here, you need to establish a three-layer interface on the switch Vlanif, Use this three-tier interface as Vlan Gateway of network segment . Specific configuration and configuration interface IP The address is the same .

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