计算机网络第9章：局域网交换与VLAN.ppt

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计算机网络第9章：局域网交换与VLAN.ppt

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* * Layer 1 of 2 Emphasize: Each VLAN has a unique, four-digit number that can be from 1 to 1001. To add a VLAN to the VLAN database, the minimum parameter required is the VLAN number. * Layer 1 of 2 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Switching The Spanning-Tree Protocol VLAN Introduction of VLAN VLAN Architecture VLAN Implementation Routing Between VLANs Table of Contents Routing Between VLANs Routing Between VLANs Subinterfaces Configuring Inter-VLAN Routing Step3: Assign an IP address to the interface Step1: Identify the interface. Router(config)#interface fastethernet port-number. subinterface-number Step2: Define the VLAN encapsulation. Router(config-if)#encapsulation dot1q vlan-number Router(config-if)#ip address ip-address subnet-mask Sydney(config)#interface FastEthernet 0/0 Sydney(config-if)#full duplex Sydney(config-if)#no shut Sydney(config-if)#interface FastEthernet 0/0.1 Sydney(config-subif)#encapsulation 802.1q 1 Sydney(config-subif)#ip address 192.168.1.1 255.255.255.0 Sydney(config-if)#interface FastEthernet 0/0.2 Sydney(config-subif)#encapsulation 802.1q 20 Sydney(config-subif)#ip address 192.168.2.1 255.255.255.0 Sydney(config-if)#interface FastEthernet 0/0.3 Sydney(config-subif)#encapsulation 802.1q 30 Sydney(config-subif)#ip address 192.168.3.1 255.255.255.0 Configuring Inter-VLAN Routing * * * * * * * * * * * * * * * * * * * * * * * * * An Example of STP Root switch Designated port Designated port Root port Root port Non-designated port Blocked 100BaseT 10BaseT MAC: 0c00c8111111 Priority: 32768 MAC: 0c00c8211112 Priority: 32768 MAC: 0c00c8111110 Priority: 32768 Designated port Switching The Spanning-Tree Protocol VLAN Introduction of VLAN VLAN Architecture VLAN Implementation Routing Between VLANs Table of Contents Existing Shared LAN Configurations In a typical shared LAN... Users are grouped physically based on the hub they are plugged into Routers segment the LAN and provide broadcast firew