SW1
sw1(config)#int range f0/11 – 12
sw1(config-if-range)#no sh
sw1(config-if-range)#speed 100                 速度100m
sw1(config-if-range)#duplex full                   全双工
sw1(config-if-range)#sw tr en dot1q           封装802.1q
sw1(config-if-range)#sw mo tr                      启用trunk
sw1(config-if-range)#channel-group 1 mode on   etherchannel组一
sw1(config-if-range)#^Z

SW2
sw2(config)#int range f0/11 – 12
sw2(config-if-range)#no sh
sw2(config-if-range)#speed 100
sw2(config-if-range)#duplex full
sw2(config-if-range)#sw mo tr
sw2(config-if-range)#sw tr en dot1q
sw2(config-if-range)#channel-group 1 mode on

验证试验

sw1#sh etherchannel summary
Flags:  D – down        P – in port-channel
        I – stand-alone s – suspended
        R – Layer3      S – Layer2
        U – in use
Group Port-channel  Ports
—–+————+———————————————————–
1     Po1(SU)     Fa0/11(P)  Fa0/12(P) 
 
sw1#sh interfaces trunk
Port      Mode         Encapsulation  Status        Native vlan
Po1       on           802.1q         trunking      1
Port      Vlans allowed on trunk
Po1       1-1005
Port      Vlans allowed and active in management domain
Po1       1
Port      Vlans in spanning tree forwarding state and not pruned
Po1       1
sw1#sh sp
VLAN1 is executing the ieee compatible Spanning Tree protocol
  Bridge Identifier has priority 32768, address ccd1.42e4.0000
  Configured hello time 2, max age 20, forward delay 15
  We are the root of the spanning tree
  Topology change flag not set, detected flag not set
  Number of topology changes 1 last change occurred 00:02:42 ago
          from FastEthernet0/11
  Times:  hold 1, topology change 35, notification 2
          hello 2, max age 20, forward delay 15
  Timers: hello 0, topology change 0, notification 0, aging 0
Port 321 (Port-channel1) of VLAN1 is forwarding
   Port path cost 12, Port priority 128, Port Identifier 129.65.
   Designated root has priority 32768, address ccd1.42e4.0000
   Designated bridge has priority 32768, address ccd1.42e4.0000
   Designated port id is 129.65, designated path cost 0
   Timers: message age 0, forward delay 0, hold 0
   Number of transitions to forwarding state: 1
   BPDU: sent 176, received 70
sw1#sh int eth         
—-
FastEthernet0/11:
Port state    = Up Mstr In-Bndl
Channel group = 1           Mode = On/FEC     Gcchange = 0
Port-channel  = Po1         GC   = 0×00010001    Pseudo port-channel = Po1
Port index    = 0
Age of the port in the current state: 00d:00h:02m:40s
—-
FastEthernet0/12:
Port state    = Up Mstr In-Bndl
Channel group = 1           Mode = On/FEC     Gcchange = 0
Port-channel  = Po1         GC   = 0×00010001    Pseudo port-channel = Po1
Port index    = 1
Age of the port in the current state: 00d:00h:02m:40s
—-
Port-channel1:
Age of the Port-channel   = 00d:00h:02m:40s
Logical slot/port   = 8/0           Number of ports = 2
GC                  = 0×00010001      HotStandBy port = null
Port state          = Port-channel Ag-Inuse
Ports in the Port-channel:
Index   Port   EC state
——+——+————
  0     Fa0/11   on        
  1     Fa0/12   on        
Time since last port bundled:    00d:00h:02m:40s    Fa0/12