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<H1 align=center>华为路由器单臂路由实例</H1>
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作者: 出处:Stcore 收集整理 <FONT color=#cc0000> ( <SPAN
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<DIV class=left_2><SPAN class=font_3>更新时间：</SPAN><A title=滚动新闻
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class=shortmsg>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。</SPAN>
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<P>
<P>需求: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.<BR>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.<BR>拓扑图如下：</P>
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<P><BR>1.路由器的配置<BR>[Router]<BR>[Router]inter e0<BR>[Router-Ethernet0]ip add
10.0.0.1 255.255.255.0 <BR>[Router-Ethernet0]inter e0.1
//定义子接口E0.1<BR>[Router-Ethernet0.1]ip add 172.16.1.1
255.255.255.0<BR>[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。<BR>[Router-Ethernet0.1]inter e0.2
//定义子接口E0.2<BR>[Router-Ethernet0.2]ip add 172.16.2.1
255.255.255.0<BR>[Router-Ethernet0.2]vlan-type dot1q vid 2
//指定以太网子接口属于VLAN2<BR>[Router-Ethernet0.2]inter e0.3
//定义子接口E0.3<BR>[Router-Ethernet0.3]ip add 172.16.3.1
255.255.255.0<BR>[Router-Ethernet0.3]vlan-type dot1q vid 3
//指定以太网子接口属于VLAN3<BR>[Router-Ethernet0.3]inter e0<BR>[Router-Ethernet0]undo
shut<BR>% Interface Ethernet0 is up<BR>[Router-Ethernet0]
//用网线将E0端口连到S3026第24端口<BR>%19:46:32: Interface Ethernet0 changed state to
UP<BR>%19:46:32: Line protocol ip on interface Ethernet0, changed state to
UP<BR>%19:46:32: Line protocol ip on interface Ethernet0.1, changed state to
UP<BR>%19:46:32: Line protocol ip on interface Ethernet0.2, changed state to
UP<BR>%19:46:32: Line protocol ip on interface Ethernet0.3, changed state to
UP<BR>2.交换机的配置</P>
<P>sys<BR>Enter system view , return user view with Ctrl+Z.<BR>[Quidway]vlan
1<BR>[Quidway-vlan1]vlan 2<BR>[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<BR>[Quidway-vlan2]vlan 3<BR>[Quidway-vlan3]port
eth 0/21 //将第21端口加入VLAN2<BR>[Quidway-vlan3]inter
e0/24<BR>[Quidway-Ethernet0/24]port link-type trunk
//将第24端口设为trunk口<BR>[Quidway-Ethernet0/24]port trunk permit vlan
all//允许所有VLAN流量通过<BR>Please wait...........................................
Done.<BR>[Quidway-Ethernet0/24]dis port trunk //检验TRUNK口配置<BR>Now, the following
trunking ports exist:<BR>Ethernet0/24 <BR>[Quidway-Ethernet0/24]dis vlan
2 //检验VLAN2的配置<BR>VLAN ID: 2<BR>VLAN Type: static<BR>Route Interface: not
configured<BR>Description: VLAN 0002<BR>Tagged Ports: <BR>Ethernet0/24
<BR>Untagged Ports: <BR>Ethernet0/17 Ethernet0/18 Ethernet0/19 Ethernet0/22
<BR>[Quidway-Ethernet0/24]dis vlan 3 //检验VLAN3的配置<BR>VLAN ID: 3<BR>VLAN Type:
static<BR>Route Interface: not configured<BR>Description: VLAN 0003<BR>Tagged
Ports: <BR>Ethernet0/24 <BR>Untagged Ports: <BR>Ethernet0/21
<BR>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。<BR>C:Documents and
SettingsAdministrator>ipconfig<BR>Windows 2000 IP Configuration<BR>Ethernet
adapter 本地连接:<BR>Connection-specific DNS Suffix . :<BR>IP Address. . . . . . . .
. . . . : 172.16.2.22<BR>Subnet Mask . . . . . . . . . . . :
255.255.255.0<BR>Default Gateway . . . . . . . . . : 172.16.2.1<BR>C:Documents
and SettingsAdministrator>ping 172.16.3.1<BR>Pinging 172.16.3.1 with 32 bytes
of data:<BR>Reply from 172.16.3.1: bytes=32 time<10ms TTL=255<BR>Reply from
172.16.3.1: bytes=32 time<10ms TTL=255<BR>Reply from 172.16.3.1: bytes=32
time<10ms TTL=255<BR>Reply from 172.16.3.1: bytes=32 time<10ms
TTL=255<BR>Ping statistics for 172.16.3.1:<BR>Packets: Sent = 4, Received = 4,
Lost = 0 (0% loss),<BR>Approximate round trip times in milli-seconds:<BR>Minimum
= 0ms, Maximum = 0ms, Average =
0ms<BR>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<BR>实现VLAN之间的通讯。<BR>[Router]display
ip routing-table<BR>Routing Tables:<BR>Destination/Mask Proto Pref Metric
Nexthop Interface<BR>10.0.0.0/24 Direct 0 0 10.0.0.1 Ethernet0 <BR>10.0.0.1/32
Direct 0 0 127.0.0.1 LoopBack0 <BR>127.0.0.0/8 Direct 0 0 127.0.0.1 LoopBack0
<BR>127.0.0.1/32 Direct 0 0 127.0.0.1 LoopBack0 <BR>172.16.1.0/24 Direct 0 0
172.16.1.1 Ethernet0.1 <BR>172.16.1.1/32 Direct 0 0 127.0.0.1 LoopBack0
<BR>172.16.2.0/24 Direct 0 0 172.16.2.1 Ethernet0.2 <BR>172.16.2.1/32 Direct 0 0
127.0.0.1 LoopBack0 <BR>172.16.3.0/24 Direct 0 0 172.16.3.1 Ethernet0.3
<BR>172.16.3.1/32 Direct 0 0 127.0.0.1 LoopBack0</P>
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