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.
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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。
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1.路由器的配置& a m+ @: }: b
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, h7 J5 D- f7 X" ? [Router]inter e0; I! J. L( ?' p
4 _) O$ L8 b# J7 e8 _2 E [Router-Ethernet0]ip add 10.0.0.1 255.255.255.0
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[Router-Ethernet0]inter e0.1 //定义子接口E0.1$ R5 a. o: ~& n8 I4 F$ B' @
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[Router-Ethernet0.1]ip add 172.16.1.1 255.255.255.0- ` t" j* F3 V
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[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。
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% B6 Y% L0 z+ D' I6 n- Q2 j1 e [Router-Ethernet0.1]inter e0.2 //定义子接口E0.2
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[Router-Ethernet0.2]ip add 172.16.2.1 255.255.255.0
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[Router-Ethernet0.2]vlan-type dot1q vid 2 //指定以太网子接口属于VLAN26 a1 y* P8 ?. d Z/ M5 C% |* \% }. O
: x5 v4 a* O( D% k* K( O! O7 G [Router-Ethernet0.2]inter e0.3 //定义子接口E0.3
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[Router-Ethernet0.3]ip add 172.16.3.1 255.255.255.0/ p5 T! F2 V1 h
; e' z* P$ i( ?( Y5 y% \, X [Router-Ethernet0.3]vlan-type dot1q vid 3 //指定以太网子接口属于VLAN3
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# A+ X) \. |) [ [Router-Ethernet0.3]inter e0; k# a* z7 X% b @$ F& q
3 V1 w% s2 b( G: O [Router-Ethernet0]undo shut9 j- v$ g3 O, U* T% r
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% Interface Ethernet0 is up
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[Router-Ethernet0] //用网线将E0端口连到S3026第24端口
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%19:46:32: Interface Ethernet0 changed state to UP5 @+ c0 z4 X p2 U3 Q# D7 J, r
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%19:46:32: Line protocol ip on interface Ethernet0, changed state to UP+ X, E) E1 M/ p+ Y7 ?# M
! `5 V+ s1 M. O6 p H3 G |% p %19:46:32: Line protocol ip on interface Ethernet0.1, changed state to UP
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%19:46:32: Line protocol ip on interface Ethernet0.2, changed state to UP* h$ L! ~. A" o, ^, I
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%19:46:32: Line protocol ip on interface Ethernet0.3, changed state to UP$ [0 A1 w" B$ O6 Z* n8 D
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2.交换机的配置
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sys
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Enter system view , return user view with Ctrl+Z.
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[Quidway]vlan 1
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0 o( N7 c# B6 e1 g4 j& r [Quidway-vlan1]vlan 2
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4 M0 P) A, K' s' Y6 l, q0 W" o7 ^ [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
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2 u ] V9 w' T7 a5 \9 E [Quidway-vlan3]port eth 0/21 //将第21端口加入VLAN2: O* T/ `# o3 n* V6 h2 k
$ `0 `* j' F L. t2 o7 z# [ [Quidway-vlan3]inter e0/24
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6 {) T3 C! D+ ^1 x% ?- n [Quidway-Ethernet0/24]port link-type trunk //将第24端口设为trunk口& w4 q( A* X! k) F3 I! q& n# P
& `% ]; @6 {$ l) j [Quidway-Ethernet0/24]port trunk permit vlan all //允许所有VLAN流量通过1 _" U1 r- P n; G
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Please wait…… Done.
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: `( V& P6 x( e# L4 z5 n [Quidway-Ethernet0/24]dis port trunk //检验TRUNK口配置
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Now, the following trunking ports exist:
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Ethernet0/24
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9 m! y% i- o- F/ `/ } [Quidway-Ethernet0/24]dis vlan 2 //检验VLAN2的配置4 w* `8 m9 S" }. P8 M
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VLAN ID: 2
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VLAN Type: static/ ^5 o2 Y" F- Y% \7 U
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Route Interface: not configured% ?. g& n1 L- l* C
- d7 I: c/ C& H ~3 r$ {, E Description: VLAN 0002, {) z k& [1 `) X! h+ B5 v
3 f) G4 T( C6 U. c/ k Tagged Ports:
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Ethernet0/24. Y8 k$ V2 w+ h- u
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Untagged Ports:
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[Quidway-Ethernet0/24]dis vlan 3 //检验VLAN3的配置2 ~8 K4 H( q/ _$ d
7 R( Q( P2 n/ X2 u VLAN ID: 38 e- S$ k& l+ e' m
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VLAN Type: static
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Route Interface: not configured
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Description: VLAN 0003# `/ g5 {" C- @% `/ |
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Tagged Ports:8 O- k# y3 R# u* L1 e+ f: U7 X
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Ethernet0/24
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