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交换机的配置: SW2950#configure t SW2950(config)#vlan 2 SW2950(config)#vlan 3 SW2950(config)#int fastEthernet 0/1 SW2950(config-if)#switchport mode trunk SW2950(config-if)#no shutdown SW2950(config)#int fastEthernet 0/2 SW2950(config-if)#switchport mode access SW2950(config-if)#switchport access vlan 2 SW2950(config-if)#int fas0/3 SW2950(config-if)#switchport mode access SW2950(config-if)#switchport access vlan 3 SW2950(config-if)#end SW2950#sho vlan VLAN Name Status Ports ------------------------------------ --------- ------------------------------- 1 default active Fa0/1, Fa0/5, Fa0/6, Fa0/7 Fa0/8, Fa0/9, Fa0/10, Fa0/11 Fa0/12, Fa0/13, Fa0/14, Fa0/15 Fa0/16, Fa0/17, Fa0/18, Fa0/19 Fa0/20, Fa0/21, Fa0/22, Fa0/23 Fa0/24 2 VLAN0002 active Fa0/2 3 VLAN0003 active Fa0/3 SW2950# SW2950#show interfaces fastEthernet 0/1 switchport Name: Fa0/1 Switchport: Enabled Administrative Mode: trunk Operational Mode: up Administrative Trunking Encapsulation: isl Negotiation of Trunking: On Access Mode VLAN: 1 (default) Trunking Native Mode VLAN: 1 (default) Voice VLAN: none Administrative private-vlanhost-association: none Administrative private-vlan mapping: none Administrative private-vlan trunk nativeVLAN: none Administrative private-vlan trunkencapsulation: isl Administrative private-vlan trunk normalVLANs: none Administrative private-vlan trunk privateVLANs: none Operational private-vlan: none Trunking VLANs Enabled: ALL Pruning VLANs Enabled: 2-1001 Capture Mode Disabled Capture VLANs Allowed: ALL Protected: false Appliance trust: none SW2950# 路由器的配置: interface fastethernet 0/0
no ip address
no shutdown
interface ethernet 0/0.2
ip address 10.1.1.1 255.255.255.0 //VLAN2的网关
encapsulation isl 2
interface ethernet 0/0.3
ip address 10.2.2.1 255.255.255.0 //vlan3的网关
encapsulation isl 3 交换机的配置: SW2950#configure t SW2950(config)#vlan 2 SW2950(config)#vlan 3 SW2950(config)#int fastEthernet 0/1 SW2950(config-if)#switchport mode trunk SW2950(config-if)#no shutdown SW2950(config)#int fastEthernet 0/2 SW2950(config-if)#switchport mode access SW2950(config-if)#switchport access vlan 2 SW2950(config-if)#int fas0/3 SW2950(config-if)#switchport mode access SW2950(config-if)#switchport access vlan 3 SW2950(config-if)#end SW2950#sho vlan VLAN Name Status Ports ---- ----------------------------------------- ------------------------------- 1 default active Fa0/1, Fa0/5, Fa0/6,Fa0/7 Fa0/8, Fa0/9,Fa0/10, Fa0/11 Fa0/12, Fa0/13, Fa0/14, Fa0/15 Fa0/16, Fa0/17, Fa0/18, Fa0/19 Fa0/20, Fa0/21, Fa0/22, Fa0/23 Fa0/24 2 VLAN0002 active Fa0/2 3 VLAN0003 active Fa0/3 SW2950# SW2950#show interfaces fastEthernet 0/1 switchport Name: Fa0/1 Switchport: Enabled Administrative Mode: trunk Operational Mode: up Administrative Trunking Encapsulation: dot1q Negotiation of Trunking: On Access Mode VLAN: 1 (default) Trunking Native Mode VLAN: 1 (default) Voice VLAN: none Administrative private-vlanhost-association: none Administrative private-vlan mapping: none Administrative private-vlan trunk nativeVLAN: none Administrative private-vlan trunkencapsulation: dot1q Administrative private-vlan trunk normalVLANs: none Administrative private-vlan trunk privateVLANs: none Operational private-vlan: none Trunking VLANs Enabled: ALL Pruning VLANs Enabled: 2-1001 Capture Mode Disabled Capture VLANs Allowed: ALL Protected: false Appliance trust: none SW2950# 路由器的配置: interface fastethernet 0/0
no ip address
no shutdown
interface ethernet 0/0.2
ip address 10.1.1.1 255.255.255.0 //VLAN2的网关
encapsulation dot1q 2
interface ethernet 0/0.3
ip address 10.2.2.1 255.255.255.0 //vlan3的网关
encapsulation dot1q 3
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发表于 2026-7-27 11:20:25