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6.6. Ethernet Port Groups

SwitchA

		
SwitchA# configure terminal
SwitchA (config)# interface range GigabitEthernet1/1-2
SwitchA (config-if-range)# switchport mode access
SwitchA (config-if-range)# switchport access vlan 10
SwitchA (config-if-range)# channel-group 5 mode on
Switch(config-if-range)# end
		
		

SwitchB

		
SwitchB# configure terminal
SwitchB(config)#interface range GigabitEthernet1/0/1-2
SwitchB(config-if-range)#switchport mode access
SwitchB(config-if-range)#switchport access vlan 10
SwitchB(config-if-range)#channel-group 1 mode on
Creating a port-channel interface Port-channel 1

SwitchB(config-if-range)#int port-channel 1
SwitchB(config-if)#exit
SwitchB(config)#do show etherchannel summary
Flags:  D - down        P - in port-channel
        I - stand-alone s - suspended
        H - Hot-standby (LACP only)
        R - Layer3      S - Layer2
        U - in use      f - failed to allocate aggregator
        u - unsuitable for bundling
        w - waiting to be aggregated
        d - default port


Number of channel-groups in use: 1
Number of aggregators:           1

Group  Port-channel  Protocol    Ports
------+-------------+-----------+-----------------------------------------------
1      Po1(SU)          -        Gi1/0/1(P) Gi1/0/2(P)
		
		

6.6.1. LACP

channel-group 4 mode active 这个命令控制是否用LACP的。

c4506(config)#inter g6/5
c4506(config-if)#channel-group 4 mode ?
  active     Enable LACP unconditionally
  auto       Enable PAgP only if a PAgP device is detected
  desirable  Enable PAgP unconditionally
  on         Enable Etherchannel only
  passive    Enable LACP only if a LACP device is detected

c4506(config-if)#channel-group 4 mode active
			

6.6.2. desirable

例 6.1. desirable

switch A

Switch(config)#interface range fa0/1-4 						#range配置二个以上的接口
Switch(config-if-range)#channel-group 1 mode desirable 		#封装为自动协商模式
Switch(config-if-range)#switchport mode trunk
Switch(config-if-range)#switchport trunk encapsulation dot1q
Switch(config-if-range)#switchport trunk allowed vlan all	#允许所以vlan通过
				

switch B

Switch(config)#interface range fa0/1-4
Switch(config-if-range)#channel-group 1 mode desirable
Switch(config-if-range)#switchport mode trunk
Switch(config-if-range)#switchport trunk encapsulation dot1q
Switch(config-if-range)#switchport trunk allowed vlan all
				

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