交换机A上1-2端口对应交换机B上3-4端口

PC1链接交换机A上23端口

PC2链接交换机B上24端口

命令如下：

DCS-3950-28C>en
DCS-3950-28C#con
DCS-3950-28C(config)#hostname switchA
switchA(config)#%Jan 01 00:01:39 2006 %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet1/2,changed state to DOWN
%Jan 01 00:01:41 2006 %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet1/2,changed state to UP
%Jan 01 00:01:42 2006 %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet1/1,changed state to DOWN
%Jan 01 00:01:44 2006 %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet1/1,changed state to UP

switchA(config)#
switchA(config)#interface vlan 1
switchA(config-if-vlan1)#ip address 192.168.1.11 255.255.255.0
switchA(config-if-vlan1)#no shutdown
switchA(config-if-vlan1)#q
switchA(config)#spanning-tree

MSTP is starting now,please wait............
MSTP is enabled successfully.
switchA(config)#%Jan 01 00:02:17 2006 %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1,changed state to DOWN
8
DCS-3950-28C>
DCS-3950-28C>
DCS-3950-28C>en
DCS-3950-28C#config
DCS-3950-28C(config)#hostname switchB
switchB(config)#interface vlan 1
switchB(config-if-vlan1)#ip
ip ipv6
switchB(config-if-vlan1)#ip address 192.168.1.12 255.255.255.0
switchB(config-if-vlan1)#no shutdown
switchB(config-if-vlan1)#q
switchB(config)#spanning-tree

MSTP is starting now,please wait............
MSTP is enabled successfully.
switchB(config)#%Jan 01 00:03:42 2006 %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1,changed state to DOWN
%Jan 01 00:03:44 2006 MSTP set port = 4,mst = 0 to LEARNING!
%Jan 01 00:03:44 2006 MSTP set port = 4,mst = 0 to FORWARDING!
%Jan 01 00:03:44 2006 Root bridge has been changed. PRS is triggered: INSTANCE=0
%Jan 01 00:03:44 2006 CistRoot = 32768.00:03:0f:61:74:b5,CistRegRoot = 32768.00:03:0f:61:74:b5
%Jan 01 00:03:45 2006 %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1,changed state to UP

switchA(config)#
switchA(config)#
switchA(config)#port-group 1
switchA(config)#%Jan 01 00:03:21 2006 %LINK-3-UPDOWN: Interface Port-Channel1,changed state to administratively DOWN
%Jan 01 00:03:21 2006 MSTP set port = 29,mst = 0 to DISCARDING!
%Jan 01 00:03:25 2006 MSTP set port = 2,mst = 0 to LEARNING!

switchB(config)#
switchB(config)#port-group 2
switchB(config)#%Jan 01 00:04:13 2006 MSTP set port = 24,mst = 0 to FORWARDING!
%Jan 01 00:04:13 2006 %LINK-3-UPDOWN: Interface Port-Channel2,changed state to administratively DOWN
%Jan 01 00:04:13 2006 MSTP set port = 30,mst = 0 to DISCARDING!

switchB(config)#
switchB(config)#
switchB(config)#%Jan 01 00:03:42 2006 MSTP set port = 2,mst = 0 to FORWARDING!

switchA(config)#
switchA(config)#interface ethernet 1/1-2
switchA(config-if-port-range)#port-group 1 mode
active on passive
switchA(config-if-port-range)#port-group 1 mode on
switchA(config-if-port-range)#%Jan 01 00:05:32 2006 %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-Channel1,changed state to UP
%Jan 01 00:05:32 2006 MSTP set port = 29,mst = 0 to DISCARDING!

switchA(config-if-port-range)#q
switchA(config)#interface %Jan 01 00:05:39 2006 MSTP set port = 29,mst = 0 to LEARNING!
%Jan 01 00:05:39 2006 MSTP set port = 29,mst = 0 to FORWARDING!
interface port-channel 1
switchA(config-if-port-channel1)#show vlan
vlan vlan-translation
switchA(config-if-port-channel1)#show vlan
VLAN Name Type Media Ports
---- ------------ ---------- --------- ----------------------------------------
1 default Static ENET Ethernet1/3 Ethernet1/4
Ethernet1/5 Ethernet1/6
Ethernet1/7 Ethernet1/8
Ethernet1/9 Ethernet1/10
Ethernet1/11 Ethernet1/12
Ethernet1/13 Ethernet1/14
Ethernet1/15 Ethernet1/16
Ethernet1/17 Ethernet1/18
Ethernet1/19 Ethernet1/20
Ethernet1/21 Ethernet1/22
Ethernet1/23 Ethernet1/24
Ethernet1/25 Ethernet1/26
Ethernet1/27 Ethernet1/28
Port-Channel1
switchA(config-if-port-channel1)#int e 1/3-4
switchB(config-if-port-range)#int e 1/3-4
switchB(config-if-port-range)#q
switchB(config)#int e 1/3-4
switchB(config-if-port-range)#port-group 2 mode on
switchB(config-if-port-range)#%Jan 01 00:07:22 2006 Root bridge has been changed. PRS is triggered: INSTANCE=0
%Jan 01 00:07:22 2006 CistRoot = 32768.00:03:0f:61:75:03,CistRegRoot = 32768.00:03:0f:61:75:03
%Jan 01 00:07:24 2006 %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-Channel2,changed state to UP
%Jan 01 00:07:24 2006 MSTP set port = 30,mst = 0 to DISCARDING!

switchB(config-if-port-range)#
switchB(config-if-port-range)#q
switchB(config)#%Jan 01 00:07:25 2006 Root bridge has been changed. PRS is triggered: INSTANCE=0
%Jan 01 00:07:25 2006 CistRoot = 32768.00:03:0f:61:74:b5,CistRegRoot = 32768.00:03:0f:61:74:b5
%Jan 01 00:07:25 2006 MSTP set port = 30,mst = 0 to LEARNING!
%Jan 01 00:07:25 2006 MSTP set port = 30,mst = 0 to FORWARDING!

switchB(config)#
switchB(config)#po
policy-map port-group port-rate-statistics
port-scan-mode port-status
switchB(config)#interface port-channel 2
switchB(config-if-port-channel2)#show vlan
vlan vlan-translation
switchB(config-if-port-channel2)#show vlan
VLAN Name Type Media Ports
---- ------------ ---------- --------- ----------------------------------------
1 default Static ENET Ethernet1/1 Ethernet1/2
Ethernet1/5 Ethernet1/6
Ethernet1/7 Ethernet1/8
Ethernet1/9 Ethernet1/10
Ethernet1/11 Ethernet1/12
Ethernet1/13 Ethernet1/14
Ethernet1/15 Ethernet1/16
Ethernet1/17 Ethernet1/18
Ethernet1/19 Ethernet1/20
Ethernet1/21 Ethernet1/22
Ethernet1/23 Ethernet1/24
Ethernet1/25 Ethernet1/26
Ethernet1/27 Ethernet1/28
Port-Channel2
switchB(config-if-port-channel2)#show running-config
!
no service password-encryption
!
hostname switchB
sysLocation China
sysContact 800-810-9119
!
username admin privilege 15 password 0 admin
!
!
!
!
!
!
spanning-tree
!
!
!
!
!
vlan 1
!
port-group 2
!
Interface Ethernet1/1
!
Interface Ethernet1/2
!
Interface Ethernet1/3
port-group 2 mode on
!
Interface Ethernet1/4
port-group 2 mode on
!
Interface Ethernet1/5
!
Interface Ethernet1/6
!
Interface Ethernet1/7
!
Interface Ethernet1/8
!
Interface Ethernet1/9
!
Interface Ethernet1/10
!
Interface Ethernet1/11
!
Interface Ethernet1/12
!
Interface Ethernet1/13
!
Interface Ethernet1/14
!
Interface Ethernet1/15
!
Interface Ethernet1/16
!
Interface Ethernet1/17
!
Interface Ethernet1/18
!
Interface Ethernet1/19
!
Interface Ethernet1/20
!
Interface Ethernet1/21
!
Interface Ethernet1/22
!
Interface Ethernet1/23
!
Interface Ethernet1/24
!
Interface Ethernet1/25
!
Interface Ethernet1/26
!
Interface Ethernet1/27
!
Interface Ethernet1/28
!
Interface Port-Channel2
!
interface Vlan1
ip address 192.168.1.12 255.255.255.0
!
no login
!
end

switchB(config-if-port-channel2)#?
switchA(config-if-port-channel1)#
switchA(config-if-port-channel1)#
switchA(config-if-port-channel1)#show running-config
!
no service password-encryption
!
hostname switchA
sysLocation China
sysContact 800-810-9119
!
username admin privilege 15 password 0 admin
!
!
!
!
!
!
spanning-tree
!
!
!
!
!
vlan 1
!
port-group 1
!
Interface Ethernet1/1
port-group 1 mode on
!
Interface Ethernet1/2
port-group 1 mode on
!
Interface Ethernet1/3
!
Interface Ethernet1/4
!
Interface Ethernet1/5
!
Interface Ethernet1/6
!
Interface Ethernet1/7
!
Interface Ethernet1/8
!
Interface Ethernet1/9
!
Interface Ethernet1/10
!
Interface Ethernet1/11
!
Interface Ethernet1/12
!
Interface Ethernet1/13
!
Interface Ethernet1/14
!
Interface Ethernet1/15
!
Interface Ethernet1/16
!
Interface Ethernet1/17
!
Interface Ethernet1/18
!
Interface Ethernet1/19
!
Interface Ethernet1/20
!
Interface Ethernet1/21
!
Interface Ethernet1/22
!
Interface Ethernet1/23
!
Interface Ethernet1/24
!
Interface Ethernet1/25
!
Interface Ethernet1/26
!
Interface Ethernet1/27
!
Interface Ethernet1/28
!
Interface Port-Channel1
!
interface Vlan1
ip address 192.168.1.11 255.255.255.0
!
no login
!
end

switchA(config-if-port-channel1)#q
switchA(config)#

附图：

交换机A：1-2端口 交换机B：3-4端口ping测试

交换机A：1-2端口 交换机B：去掉4端口ping测试

交换机A：1-2端口 交换机B：5-6端口ping测试（虽然等了一小会但是还是ping通了）