Layer 2 Ether channel

Jan 30, 2007 2 Replies
Layer 2 Ether channel open original image

Hi all,



A little query.



I have just set-up Ether channel between two Cisco 3750s. I'm using layer 2 ether channel using two ports on each switch.



Everything is identical and seems to work and fail-over OK. i.e. when I drop one of the links in the bundle, everything keeps going as it should. But, when I plug one of the leads back in that has been unplugged, sometimes the port goes into err-disable.



Is this normal?



My ether channel config is this, and is the same on both switches:



interface Port-channel1 description Link to Core 2 g1/0/11-12 switchport trunk encapsulation dot1q switchport trunk native vlan 5 switchport mode trunk


interface GigabitEthernet1/0/11 switchport trunk encapsulation dot1q switchport trunk native vlan 5 switchport mode trunk channel-group 1 mode on ! interface GigabitEthernet1/0/12 switchport trunk encapsulation dot1q switchport trunk native vlan 5 switchport mode trunk channel-group 1 mode on



Can anyone advise if this is me, or this is just normal, and maybe I have been talking my testing too far.



Regards



James


Try changing the mode te desirable.

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