华为路由器单臂路由

在局域网中,通过交换机上配置VLAN可以减少主机通信广播域的范围,当VLAN之间有部分主机需要通信,但交换机不支持三层交换时,可以采用一台支持802.1Q的路由器实现VLAN的互通.这需要在以太口上建立子接口,分配IP地址作为该VLAN的网关,同时启动802.1Q.
  组网:路由器E0端口与交换机的上行trunk端口(第24端口)相连,交换机下行口划分3个VLAN,带若干主机.

  拓扑图如下:

                                               S30261-------------------R2631E
                                                      |
___________________________|_______________________________
|                          |                              |
172.16.1.0/24(VLAN1)      172.16.2.0/24(VLAN2)           172.16.3.0/24(VLAN3)

  1.路由器的配置

  [Router]

  [Router]inter e0

  [Router-Ethernet0]ip add 10.0.0.1 255.255.255.0

  [Router-Ethernet0]inter e0.1 //定义子接口E0.1

  [Router-Ethernet0.1]ip add 172.16.1.1 255.255.255.0

  [Router-Ethernet0.1]vlan-type dot1q vid 1 //指定以太网子接口属于VLAN1,此命令应用在以太网子接口上。只有配置了该命令之后,以太网子接口才会根据配置的VLAN ID 号在以太网帧头中嵌入VLAN 标签,与该网口相连的交换机接口才能正确处理接收到的帧。

  [Router-Ethernet0.1]inter e0.2 //定义子接口E0.2

  [Router-Ethernet0.2]ip add 172.16.2.1 255.255.255.0

  [Router-Ethernet0.2]vlan-type dot1q vid 2 //指定以太网子接口属于VLAN2

  [Router-Ethernet0.2]inter e0.3 //定义子接口E0.3

  [Router-Ethernet0.3]ip add 172.16.3.1 255.255.255.0

  [Router-Ethernet0.3]vlan-type dot1q vid 3 //指定以太网子接口属于VLAN3

  [Router-Ethernet0.3]inter e0

  [Router-Ethernet0]undo shut

  % Interface Ethernet0 is up

  [Router-Ethernet0] //用网线将E0端口连到S3026第24端口

  %19:46:32: Interface Ethernet0 changed state to UP

  %19:46:32: Line protocol ip on interface Ethernet0, changed state to UP

  %19:46:32: Line protocol ip on interface Ethernet0.1, changed state to UP

  %19:46:32: Line protocol ip on interface Ethernet0.2, changed state to UP

  %19:46:32: Line protocol ip on interface Ethernet0.3, changed state to UP

  2.交换机的配置

  <Quidway>

  <Quidway>sys

  Enter system view , return user view with Ctrl+Z.

  [Quidway]vlan 1

  [Quidway-vlan1]vlan 2

  [Quidway-vlan2]port ethernet 0/17 to eth 0/19 eth 0/22 //将第17至19端口,和第22端口加入VLAN2

  [Quidway-vlan2]vlan 3

  [Quidway-vlan3]port eth 0/21 //将第21端口加入VLAN2

  [Quidway-vlan3]inter e0/24

  [Quidway-Ethernet0/24]port link-type trunk //将第24端口设为trunk口

  [Quidway-Ethernet0/24]port trunk permit vlan all//允许所有VLAN流量通过

  Please wait........................................... Done.

  [Quidway-Ethernet0/24]dis port trunk //检验TRUNK口配置

  Now, the following trunking ports exist:

  Ethernet0/24

  [Quidway-Ethernet0/24]dis vlan 2 //检验VLAN2的配置

  VLAN ID: 2

  VLAN Type: static

  Route Interface: not configured

  Description: VLAN 0002

  Tagged Ports:

  Ethernet0/24

  Untagged Ports:

  Ethernet0/17 Ethernet0/18 Ethernet0/19 Ethernet0/22

  [Quidway-Ethernet0/24]dis vlan 3 //检验VLAN3的配置

  VLAN ID: 3

  VLAN Type: static

  Route Interface: not configured

  Description: VLAN 0003

  Tagged Ports:

  Ethernet0/24

  Untagged Ports:

  Ethernet0/21

  3.在工作站上检查网络是否连通。此工作站连接S3026第21端口,属于VLAN2。

  C:/Documents and Settings/Administrator>ipconfig

  Windows 2000 IP Configuration

  Ethernet adapter 本地连接:

  Connection-specific DNS Suffix . :

  IP Address. . . . . . . . . . . . : 172.16.2.22

  Subnet Mask . . . . . . . . . . . : 255.255.255.0

  Default Gateway . . . . . . . . . : 172.16.2.1

  C:/Documents and Settings/Administrator>ping 172.16.3.1

  Pinging 172.16.3.1 with 32 bytes of data:

  Reply from 172.16.3.1: bytes=32 time<10ms TTL=255

  Reply from 172.16.3.1: bytes=32 time<10ms TTL=255

  Reply from 172.16.3.1: bytes=32 time<10ms TTL=255

  Reply from 172.16.3.1: bytes=32 time<10ms TTL=255

  Ping statistics for 172.16.3.1:

  Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

  Approximate round trip times in milli-seconds:

  Minimum = 0ms, Maximum = 0ms, Average = 0ms

  4.在路由器上查看路由表。可以发现,由于172.16各网段都是直连路由,故不需启用路由协议或静态路由即能实现VLAN之间的通讯。

  [Router]display ip routing-table

  Routing Tables:

  Destination/Mask Proto Pref Metric Nexthop Interface

  10.0.0.0/24 Direct 0 0 10.0.0.1 Ethernet0

  10.0.0.1/32 Direct 0 0 127.0.0.1 LoopBack0

  127.0.0.0/8 Direct 0 0 127.0.0.1 LoopBack0

  127.0.0.1/32 Direct 0 0 127.0.0.1 LoopBack0

  172.16.1.0/24 Direct 0 0 172.16.1.1 Ethernet0.1

  172.16.1.1/32 Direct 0 0 127.0.0.1 LoopBack0

  172.16.2.0/24 Direct 0 0 172.16.2.1 Ethernet0.2

  172.16.2.1/32 Direct 0 0 127.0.0.1 LoopBack0

  172.16.3.0/24 Direct 0 0 172.16.3.1 Ethernet0.3

  172.16.3.1/32 Direct 0 0 127.0.0.1 LoopBack0

 

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