Etherchannel Port state=Down Not-in-Bndl

[r.bochenek]

I have a problem with the interface in Etherchannel.

The Etherchannel is set up between stacked 4x2960 and 4x3750 switches.

The link has two ports on each side, but only one is active.

2960:

Group Port-channel Protocol Ports
------+-------------+-----------+-----------------------------------------------

3 Po3(SU) - Te3/0/2(P) Te4/0/2(D)

interface TenGigabitEthernet3/0/2
switchport mode trunk
switchport nonegotiate
channel-group 3 mode on

interface TenGigabitEthernet4/0/2
switchport mode trunk
channel-group 3 mode on

3750:

Group Port-channel Protocol Ports
------+-------------+-----------+-----------------------------------------------
3 Po3(SU) - Te3/1/2(P) Te4/1/2(D)

interface TenGigabitEthernet4/1/2
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 3 mode on

interface TenGigabitEthernet3/1/2
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 3 mode on

what can be done to activate these ports?

[MHM Cisco World · Accepted solution]

I send you message check it 

[marce1000]

@MHM Cisco World - Do you have any particular reason(s) for not sharing content and knowledge in the community ; being one of it's core purposes (?)

 Tx - M.

[r.bochenek]

It turned out that the optical fiber was damaged, thanks for the suggestions.