教你配置EtherChannel

Catalyst 2950 Switch
Cat2950#
Cat2950#conf t
Enter configuration commands, one per line. End with CNTL/Z.
!-- The VLAN Trunk Protocol (VTP) mode is set to server,
!-- and the VTP domain name to is set to cisco.
Cat2950(config)#vtp mode server
Setting device to VTP SERVER mode
Cat2950(config)#vtp domain cisco
Changing VTP domain name from VitalCom to cisco
!-- Created two VLANs: VLAN10 and VLAN20.
Cat2950(config)#vlan 10
Cat2950(config-vlan)#exit
Cat2950(config)#vlan 20
Cat2950(config-vlan)#exit
!-- Configured ports Fa0/5 through Fa0/14 in VLAN10,
!-- and ports fa0/15 through Fa0/26 in VLAN20.
Cat2950(config)#int range fa0/5 - 14
Cat2950(config-if-range)#switchport access vlan 10
Cat2950(config-if-range)#exit
Cat2950(config)#int range fa0/15 - 26
Cat2950(config-if-range)#switchport access vlan 20
Cat2950(config-if-range)#^Z
Cat2950#
00:32:39: %SYS-5-CONFIG_I: Configured from console by console
!-- Configured the management interface so that the switch
!-- can be accessed remotely by using Telnet.
Cat2950#conf t
Cat2950(config)#int vlan 10
Cat2950(config-if)#ip address 10.10.10.10 255.255.255.0
Cat2950(config-if)#no shutdown
00:24:07: %LINK-3-UPDOWN: Interface Vlan10, changed state to up
Cat2950(config-if)#^Z
00:24:12: %SYS-5-CONFIG_I: Configured from console by console
Cat2950#conf t
Enter configuration commands, one per line. End with CNTL/Z.
!-- Configured the default-gateway, which is the IP address of the sub-interface
!-- on the router for VLAN 10, so that the switch can be accessed from any VLAN.
Cat2950(config)#ip default-gateway 10.10.10.1
!-- Configured a logical channel interface.
Cat2950(config)#int port-channel 1
Cat2950(config-if)#exit
!-- Ports are assigned to the logical channel interface to form an EtherChannel.
!-- Note: The channel mode on the switch is set to on because the Cisco 7200
!-- router on the other end does not support Port Aggregation Protocol(PAgP).
Cat2950(config)#int fa0/2
Cat2950(config-if)#channel-group 1 mode on
Cat2950(config-if)#exit
Cat2950(config)#
00:25:38: %LINK-3-UPDOWN: Interface Port-channel1, changed state to up
00:25:39: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel1,
changed
state to up
Cat2950(config)#int fa0/3
Cat2950(config-if)#channel-group 1 mode on
Cat2950(config-if)#exit
!-- To configure trunking over EtherChannel, trunking
!-- is enabled over the logical channel interface.
Cat2950(config)#int port-channel 1
Cat2950(config-if)#switchport mode trunk
Cat2950(config-if)#
00:27:14: %LINEPROTO-5-UPDOWN: Line protocol on Interface
FastEthernet0/2, chang
ed state to down
00:27:14: %LINEPROTO-5-UPDOWN: Line protocol on Interface
FastEthernet0/3, chang
Ed state to down
00:27:14: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel1,
changed
state to down
00:27:17: %LINEPROTO-5-UPDOWN: Line protocol on Interface
FastEthernet0/2, chang
Ed state to up
00:27:17: %LINEPROTO-5-UPDOWN: Line protocol on Interface
FastEthernet0/3, chang
Ed state to up
00:27:18: %LINK-3-UPDOWN: Interface Port-channel1, changed state to up
00:27:19: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel1,
changed
state to up
!-- Configured VLAN10 as the Native VLAN for untagged traffic.
Cat2950(config-if)#switchport trunk native vlan 10
Cat2950(config-if)#^Z
00:24:12: %SYS-5-CONFIG_I: Configured from console by console
Cat2950#

Cisco 7200 Router
Cisco7200#
Cisco7200#conf t
Enter configuration commands, one per line. End with CNTL/Z.
!-- Created a logical channel interface to form an EtherChannel.
Cisco7200(config)#int port-channel 1
Cisco7200(config-if)#exit
!-- The ports fa3/0 and fa4/0 are configured as members of the
!-- logical channel to form an EtherChannel group.
Cisco7200(config)#int fa3/0
Cisco7200(config-if)#channel-group 1
FastEthernet3/0 added as member-1 to port-channel1
Cisco7200(config-if)#exit
Cisco7200(config)#
00:25:06: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel1,
changed
state to up
Cisco7200(config)#int fa4/0
Cisco7200(config-if)#channel-group 1
FastEthernet4/0 added as member-2 to port-channel1
Cisco7200(config-if)#exit
!-- Configured sub-interfaces over port-channel for VLAN10 and VLAN20 to
configure
!-- trunking over EtherChannel. The IP address is assigned to InterVLAN routing.
!-- Configured VLAN10 as the Native VLAN for untagged traffic.
Cisco7200(config)#int port-channel 1.10
Cisco7200(config-subif)#encapsulation dot1Q 10 native
Cisco7200(config-subif)#ip address 10.10.10.1 255.255.255.0
Cisco7200(config-subif)#exit
Cisco7200(config)#int port-channel 1.20
Cisco7200(config-subif)#encapsulation dot1Q 20
Cisco7200(config-subif)#ip address 10.10.11.1 255.255.255.0
Cisco7200(config-subif)#exit

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