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  • 配置单臂路由

    R1

    由器的物理接口可以被划分为成多个逻辑接口,这些被划分后的逻辑接口被形象的称为子接口。值得注意的是这些逻辑子接口不能被单独的开启或关闭

    Router>en
    Router#conf t
    Enter configuration commands, one per line.  End with CNTL/Z.
    
    Router(config)#hostname R1
    
    #进入和交换机连接的那个接口 0/0
    R1(config)#interface fastEthernet 0/0
    
    #激活该端口
    R1(config-if)#no shutdown 
    
    R1(config-if)#
    %LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up
    
    %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up
    
    R1(config-if)#exit
    
    #配置 子接口 这是配置单臂路由的关键,这个接口是个 逻辑接口,并不是实际存在的
    
    R1(config)#interface fastEthernet 0/0.2
    R1(config-subif)#
    %LINK-5-CHANGED: Interface FastEthernet0/0.2, changed state to up
    
    %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0.2, changed state to up
    
    #.为这个接口配置802.1Q协议,最后面的 2 是vlan 号,这也是关键部分
    R1(config-subif)#encapsulation dot1Q 2
    
    #为该接口划分网关地址
    R1(config-subif)#ip add 192.168.2.254 255.255.255.0
    
    R1(config-subif)#interface fastEthernet 0/0.3
    R1(config-subif)#
    %LINK-5-CHANGED: Interface FastEthernet0/0.3, changed state to up
    
    %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0.3, changed state to up
    
    #.为这个接口配置802.1Q协议,最后面的 3 是vlan 号
    R1(config-subif)#encapsulation dot1Q 3
    
    #划分网关地址和子网掩码
    R1(config-subif)#ip add 192.168.3.254 255.255.255.0
    
    R1(config-subif)#end
    R1#
    %SYS-5-CONFIG_I: Configured from console by console
    
    
    R1(config)#end
    
    R1#show ip int br
    Interface              IP-Address      OK? Method Status                Protocol 
    FastEthernet0/0        unassigned      YES unset  up                    up 
    FastEthernet0/0.2      192.168.2.254   YES manual up                    up 
    FastEthernet0/0.3      192.168.3.254   YES manual up                    up 
    FastEthernet0/1        unassigned      YES unset  administratively down down 
    Vlan1                  unassigned      YES unset  administratively down down
    R1#

    SW1

    Switch>en
    Switch#conf t
    Enter configuration commands, one per line.  End with CNTL/Z.
    
    Switch(config)#hostname SW1
    SW1(config)#vlan 2
    SW1(config-vlan)#name caiwu
    SW1(config-vlan)#vlan 3
    SW1(config-vlan)#name it
    
    SW1(config-vlan)#end
    SW1#
    %SYS-5-CONFIG_I: Configured from console by console
    
    SW1#conf t
    Enter configuration commands, one per line.  End with CNTL/Z.
    
    SW1(config)#interface range fastEthernet 0/1-2
    
    SW1(config-if-range)#switchport mode access 
    
    SW1(config-if-range)#switchport access vlan 2
    
    SW1(config-if-range)#interface range fastEthernet 0/3-5
    
    SW1(config-if-range)#switchport mode access 
    
    SW1(config-if-range)#switchport access vlan 3
    SW1(config-if-range)#end
    SW1#
    %SYS-5-CONFIG_I: Configured from console by console
    
    SW1#show vlan brief 
    
    VLAN Name                             Status    Ports
    ---- -------------------------------- --------- -------------------------------
    1    default                          active    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, Gig0/1
                                                    Gig0/2
    2    caiwu                            active    Fa0/1, Fa0/2
    3    it                               active    Fa0/3, Fa0/4, Fa0/5
    1002 fddi-default                     active    
    1003 token-ring-default               active    
    1004 fddinet-default                  active    
    1005 trnet-default                    active    
    
    SW1#conf t
    Enter configuration commands, one per line.  End with CNTL/Z.
    SW1(config)#in
    
    SW1(config)#interface gigabitEthernet 0/1
      allowed  Set allowed VLAN characteristics when interface is in trunking mode
      native   Set trunking native characteristics when interface is in trunking
               mode
    
    SW1(config-if)#switchport mode trunk 

    SW1(config-if)#switchport nonegotiate
    %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/1, changed state to down %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/1, changed state to up SW1(config-if)#end SW1# %SYS-5-CONFIG_I: Configured from console by console SW1#show interfaces trunk Port Mode Encapsulation Status Native vlan Gig0/1 on 802.1q trunking 1 Port Vlans allowed on trunk Gig0/1 1-1005 Port Vlans allowed and active in management domain Gig0/1 1,2,3 Port Vlans in spanning tree forwarding state and not pruned Gig0/1 1,2,3 SW1#conf t Enter configuration commands, one per line. End with CNTL/Z. SW1(config)#interface fastEthernet 0/24 SW1(config-if)#switchport mode trunk SW1(config-if)#switchport nonegotiate

    SW2

    Switch>en
    Switch#conf t
    Enter configuration commands, one per line.  End with CNTL/Z.
    Switch(config)#vlan 2
    Switch(config-vlan)#name caiwu
    Switch(config-vlan)#vlan 3
    Switch(config-vlan)#name it
    Switch(config-vlan)#exit
    
    SW1(config)#hostname SW2
    
    SW2(config)#interface fastEthernet 0/1
    
    SW2(config-if)#switchport mode access 
    
    SW2(config-if)#switchport access vlan 2
    
    SW2(config-if)#interface fastEthernet 0/2
    
    SW2(config-if)#switchport mode access 
    
    SW2(config-if)#switchport access vlan 3
    SW2(config-if)#end
    SW2#
    %SYS-5-CONFIG_I: Configured from console by console
    
    SW2#show vlan brief 
    
    VLAN Name                             Status    Ports
    ---- -------------------------------- --------- -------------------------------
    1    default                          active    Fa0/3, Fa0/4, 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, Gig0/1, Gig0/2
    2    caiwu                            active    Fa0/1
    3    it                               active    Fa0/2
    1002 fddi-default                     active    
    1003 token-ring-default               active    
    1004 fddinet-default                  active    
    1005 trnet-default                    active    
    SW2#
    %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/1, changed state to down
    
    %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/1, changed state to up
    
    SW2#conf t
    Enter configuration commands, one per line.  End with CNTL/Z.
    
    SW2(config)#interface gigabitEthernet 0/1
    
    SW2(config-if)#switchport mode trunk 
    
    SW1(config-if)#switchport nonegotiate
    
    SW2(config-if)#
    SW2(config-if)#end
    SW2#
    %SYS-5-CONFIG_I: Configured from console by console
    
    
    SW2#show interfaces trunk 
    Port        Mode         Encapsulation  Status        Native vlan
    Gig0/1      on           802.1q         trunking      1
    
    Port        Vlans allowed on trunk
    Gig0/1      1-1005
    
    Port        Vlans allowed and active in management domain
    Gig0/1      1,2,3
    
    Port        Vlans in spanning tree forwarding state and not pruned
    Gig0/1      1,2,3
    
    SW2#

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  • 原文地址:https://www.cnblogs.com/peter1007/p/9397834.html
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