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Why the Fibre uplink ports are down state even after giving no shutdown command at the interface

Chitra David
Level 1
Level 1

My Predecessors brought 2 CISCO 3750 switches and implemented LACP on these core switches. Due to looping in the network the Fibre uplink ports GigabitEthernet1/1/3 and GigabitEthernet2/1/3 are down (I think these uplink ports are mirrored in the LACP concept)
Please see below from the configuration.
I logged into the core switch and went to this particular interface GigabitEthernet1/1/3 and I gave the following command and still the port is in the down state after I gave no shutdown command. Do I need to give the same no shutdown command at interface GigabitEthernet2/1/3 as well ?
Switch-Core1(config) interface GigabitEthernet1/1/3
Switch-Core1(config-if)#no shutdown

Please see below  After no shutdown command given still these 2 Gigabit fibre uplink ports are down.
GigabitEthernet1/0/20  unassigned      YES unset  up                    up
GigabitEthernet1/0/21  unassigned      YES unset  down                  down
GigabitEthernet1/0/22  unassigned      YES unset  down                  down
GigabitEthernet1/0/23  unassigned      YES unset  down                  down
GigabitEthernet1/0/24  unassigned      YES unset  up                    up
GigabitEthernet1/1/1   unassigned      YES unset  up                    up
GigabitEthernet1/1/2   unassigned      YES unset  up                    up
GigabitEthernet1/1/3   unassigned      YES unset  down                  down
GigabitEthernet1/1/4   unassigned      YES unset  up                    up
Te1/1/1                unassigned      YES unset  down                  down
Te1/1/2                unassigned      YES unset  down                  down
GigabitEthernet2/0/1   unassigned      YES unset  up                    up
GigabitEthernet2/0/2   unassigned      YES unset  up                    up
GigabitEthernet2/0/3   unassigned      YES unset  up                    up
GigabitEthernet2/0/4   unassigned      YES unset  down                  down
GigabitEthernet2/0/5   unassigned      YES unset  up                    up
GigabitEthernet2/0/6   unassigned      YES unset  down                  down
GigabitEthernet2/0/7   unassigned      YES unset  down                  down
GigabitEthernet2/0/8   unassigned      YES unset  up                    up
GigabitEthernet2/0/9   unassigned      YES unset  up                    up
GigabitEthernet2/0/10  unassigned      YES unset  down                  down
GigabitEthernet2/0/11  unassigned      YES unset  down                  down
GigabitEthernet2/0/12  unassigned      YES unset  down                  down
GigabitEthernet2/0/13  unassigned      YES unset  down                  down
GigabitEthernet2/0/14  unassigned      YES unset  up                    up
GigabitEthernet2/0/15  unassigned      YES unset  up                    up
GigabitEthernet2/0/16  unassigned      YES unset  up                    up
GigabitEthernet2/0/17  unassigned      YES unset  up                    up
GigabitEthernet2/0/18  unassigned      YES unset  up                    up
GigabitEthernet2/0/19  unassigned      YES unset  down                  down
GigabitEthernet2/0/20  unassigned      YES unset  up                    up
GigabitEthernet2/0/21  unassigned      YES unset  down                  down
GigabitEthernet2/0/22  unassigned      YES unset  up                    up
GigabitEthernet2/0/23  unassigned      YES unset  down                  down
GigabitEthernet2/0/24  unassigned      YES unset  up                    up
GigabitEthernet2/1/1   unassigned      YES unset  up                    up
GigabitEthernet2/1/2   unassigned      YES unset  up                    up
GigabitEthernet2/1/3   unassigned      YES unset  down                  down
GigabitEthernet2/1/4   unassigned      YES unset  up                    up
Te2/1/1                unassigned      YES unset  down                  down
Te2/1/2                unassigned      YES unset  down                  down
Port-channel1          unassigned      YES unset  down                  down
Port-channel2          unassigned      YES unset  down                  down

Please  let me know if I am doing something wrong .Please post me some tutorial to sort this.
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