I have 2 C2960 workstation switches and want to enable redundancy and make sure about it's fault tolerant. what I have done is config 4 trunk port (two port in each switch) and bundle them to act as etherchannel using active mode: everything worked fine until I have find that there is 2 problem here:
1. When switch turn off and then turn back to on, link stablished truely at first but in few minute change one of etherchannel interface to "Suspend (S)" instead of "P". So It's needed to manually turn it back.
2. When shutdown one of the ethterchannel interface, and "show etherchannel summary" command also shows one interface in boundle is "Down" but it seems just only 50% of packets transmit successfully to destination. and some packets fails. I have examine it with two different pc at each end.
Question:
1.Does my configuration is correct?
2.What I should do for preventing Suspening one of etherchannel interface when switch need to restart?
3.What Should I do to have redundancy and fault tolorancy feature that switch automatically detect fault link and send all packet using true link (by stop the existing load balancing).
What I have config at each switch is bellow:
>int range gigabitethernet 1/1-2
>swichport mode trunk
>ether-channel mode active
Thanks in advance
