问题
在两台交换机上分别创建vlan2、vlan3，参照如下网络拓扑图将端口加入到指定的vlan并配置IP址，实现跨交换机的同vlan主机的通信。
方案
分别在sw1和sw2上创建vlan2和vlan3并把相应的接口划分到对应的vlan并为客户端配置IP地址，IP地址具有唯一性所以同一局域网络中不能存在相同的IP，另所有的接口默认为vlan1，所以不配置trunk中继链路vlan1也是可以跨交换机通信的。
步骤
1.参照拓扑图为客户端分别配置相对应网段的IP
按从左到右顺序：192.168.1.1 192.168.1.2 192.168.2.1 192.168.2.2 192.168.3.1 192.168.3.2
192.168.1.3 192.168.1.4 192.168.2.3 192.168.2.4 192.168.3.3 192.168.3.4
2.为客户端配置IP，分别为交换机sw1和sw2创建vlan并把相应的接口划到相对应的vlan
SW1交换机
Switch >enable
Switch#configure terminal
Switch(config)#hostname SW1
SW1 (config)#vlan2
Switch(config-vlan)#exit
SW1 (config)#vlan 3
SW1 (config-vlan)#exit
SW1 (config)#interface fastEthernet 0/3
SW1 (config-if)#switchport access vlan 2
SW1 (config-if)#exit
SW1 (config)#interface fastEthernet 0/4
SW1 (config-if)#switchport access vlan 2
SW1 (config-if)#exit
SW1 (config)#interface fastEthernet 0/5
SW1 (config-if)#switchport access vlan 3
SW1 (config-if)#exit
SW1 (config)#interface fastEthernet 0/6
SW1 (config-if)#switchportaccess vlan 3
SW2交换机
Switch >enable
Switch#configure terminal
Switch(config)#hostname SW2
SW2 (config)#Switch(config-vlan)#exit
SW2 (config)#vlan 3
SW2 (config-vlan)#exit
SW2 (config)#interface fastEthernet 0/3
SW2(config-if)#switchport access vlan 2
SW2 (config-if)#exit
SW2 (config)#interface fastEthernet 0/4
SW2 (config-if)#switchport access vlan 2
SW2 (config-if)#exit
SW2 (config)#interface fastEthernet 0/5
SW2 (config-if)#switchport access vlan 3
SW2 (config-if)#exit
SW2 (config)#interface fastEthernet 0/6
SW2 (config-if)#switchport access vlan 3
3.分别查看SW1和SW2交换机上的vlan信息
SW1#show vlan
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Fa0/1, Fa0/2, 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
2 VLAN0002 active Fa0/3, Fa0/4
3 VLAN0003 active Fa0/5, Fa0/6
1002 fddi-default act/unsup
1003 token-ring-default act/unsup
1004 fddinet-default act/unsup
1005 trnet-default act/unsup
VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
1 enet 100001 1500 - - - - - 0 0
2 enet 100002 1500 - - - - - 0 0
3 enet 100003 1500 - - - - - 0 0
1002 fddi 101002 1500 - - - - - 0 0
1003 tr 101003 1500 - - - - - 0 0
1004 fdnet 101004 1500 - - - ieee - 0 0
1005 trnet 101005 1500 - - - ibm - 0 0
Remote SPAN VLANs
------------------------------------------------------------------------------
Primary Secondary Type Ports
------- --------- ----------------- ------------------------------------------
SW2#show vlan
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Fa0/1, Fa0/2, 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
2 VLAN0002 active Fa0/3, Fa0/4
3 VLAN0003 active Fa0/5, Fa0/6
1002 fddi-default act/unsup
1003 token-ring-default act/unsup
1004 fddinet-default act/unsup
1005 trnet-default act/unsup
VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
1 enet 100001 1500 - - - - - 0 0
2 enet 100002 1500 - - - - - 0 0
3 enet 100003 1500 - - - - - 0 0
1002 fddi 101002 1500 - - - - - 0 0
1003 tr 101003 1500 - - - - - 0 0
1004 fdnet 101004 1500 - - - ieee - 0 0
1005 trnet 101005 1500 - - - ibm - 0 0
Remote SPAN VLANs
------------------------------------------------------------------------------
Primary Secondary Type Ports
------- --------- ----------------- ------------------------------------------
4.为交换机配置trunk中继链接路
SW1>enable
SW1#configure terminal
SW1(config)#interface fastEthernet 0/7
SW1(config-if)#switchport mode trunk
SW2#enable
SW2#configure terminal
SW2(config)#interface fastEthernet 0/7
SW2(config-if)#switchport mode trunk
SW2(config-if)#
5.测试2.0网段和3.0网段跨交换机通信
PC>ping 192.168.2.3
Pinging 192.168.2.3 with 32 bytes of data:
Reply from 192.168.2.3: bytes=32 time=1ms TTL=128
Reply from 192.168.2.3: bytes=32 time=0ms TTL=128
Reply from 192.168.2.3: bytes=32 time=0ms TTL=128
Reply from 192.168.2.3: bytes=32 time=0ms TTL=128
Ping statistics for 192.168.2.3:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 1ms, Average = 0ms
PC>ping 192.168.3.3
Pinging 192.168.3.3 with 32 bytes of data:
Reply from 192.168.3.3: bytes=32 time=1ms TTL=128
Reply from 192.168.3.3: bytes=32 time=0ms TTL=128
Reply from 192.168.3.3: bytes=32 time=0ms TTL=128
Reply from 192.168.3.3: bytes=32 time=0ms TTL=128
Ping statistics for 192.168.3.3:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 1ms, Average = 0ms
