交换技术之 Valn 的简单理解及不同Vlan互通
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一、Vlan解决的问题
二、Vlan简单理解
三、模拟器实验一
Switch#show vlan br
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active 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
Gig1/1, Gig1/2
10 VLAN0010 active Fa0/1, Fa0/2
40 VLAN0040 active Fa0/4
1002 fddi-default active
1003 token-ring-default active
1004 fddinet-default active
1005 trnet-default active
Switch#
四、模拟器实验二
目的：通过3层交换机的路由功能实现不同网段互通
拓扑：
S1#show vlan br
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Fa2/1, Fa3/1, Fa4/1, Fa5/1
10 VLAN0010 active Fa0/1
1002 fddi-default active
1003 token-ring-default active
1004 fddinet-default active
1005 trnet-default active
S1#
S2#show vlan brief
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Fa2/1, Fa3/1, Fa4/1, Fa5/1
20 VLAN0020 active Fa0/1
1002 fddi-default active
1003 token-ring-default active
1004 fddinet-default active
1005 trnet-default active
S2#
S3#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
10 VLAN0010 active
20 VLAN0020 active
1002 fddi-default active
1003 token-ring-default active
1004 fddinet-default active
1005 trnet-default active
S3#
S3#show interfaces trunk
Port Mode Encapsulation Status Native vlan
Fa0/1 desirable n-802.1q trunking 1
Fa0/2 auto n-802.1q trunking 1
Port Vlans allowed on trunk
Fa0/1 1-1005
Fa0/2 1-1005
Port Vlans allowed and active in management domain
Fa0/1 1,10,20
Fa0/2 1,10,20
Port Vlans in spanning tree forwarding state and not pruned
Fa0/1 1,10,20
Fa0/2 1,10,20
S3#
S3#show ip interface brief
Interface IP-Address OK? Method Status Protocol
FastEthernet0/1 unassigned YES unset up up
FastEthernet0/2 unassigned YES unset up up
FastEthernet0/3 unassigned YES unset down down
.
.
Vlan1 unassigned YES unset administratively down down
Vlan10 192.168.1.254 YES manual up up
Vlan20 192.168.2.254 YES manual up up
S3#
五、模拟器实验三
Switch#show vlan br
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active 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, Gig1/1, Gig1/2
10 VLAN0010 active Fa0/1
20 VLAN0020 active Fa0/2
1002 fddi-default active
1003 token-ring-default active
1004 fddinet-default active
1005 trnet-default active
Switch#
Router#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
C 192.168.1.0/24 is directly connected, FastEthernet0/0.1
C 192.168.2.0/24 is directly connected, FastEthernet0/0.2
Router#
Router#show ip interface brief
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 unassigned YES unset up up
FastEthernet0/0.1 192.168.1.254 YES manual up up
FastEthernet0/0.2 192.168.2.254 YES manual up up
FastEthernet1/0 unassigned YES unset administratively down down
Router#
Router#show running-config
Building configuration...
Current configuration : 800 bytes
!
interface FastEthernet0/0
no ip address
duplex auto
speed auto
!
interface FastEthernet0/0.1
encapsulation dot1Q 10
ip address 192.168.1.254 255.255.255.0
!
interface FastEthernet0/0.2
encapsulation dot1Q 20
ip address 192.168.2.254 255.255.255.0
!
Router#
六、总结：
附件有Cisco PT 实验脚本
#
附件：http://down.51cto.com/data/2366781
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