What does On/FEC mean for your Etherchannel status? (Lab task 2.1)

So the Lab shows the EC state should be On/FEC, but I don't get that. I just get On for EC State.

Is this an IOS version issue?

RSRack2SW2#show etherc 1 port-c
Port-channels in the group:

Port-channel: Po1

Age of the Port-channel = 0d:03h:34m:27s
Logical slot/port = 2/1 Number of ports = 3
GC = 0x00000000 HotStandBy port = null
Port state = Port-channel Ag-Inuse
Protocol = -
Port security = Disabled

Ports in the Port-channel:

Index Load Port EC state No of bits
0 00 Fa0/13 On 0
0 00 Fa0/14 On 0
0 00 Fa0/15 On 0

Time since last port bundled: 0d:00h:00m:36s Fa0/15
Time since last port Un-bundled: 0d:00h:00m:39s Fa0/15

RSRack2SW2#show int po1 trunk

Port Mode Encapsulation Status Native vlan
Po1 on isl trunking 1

Port Vlans allowed on trunk
Po1 1-4094

Port Vlans allowed and active in management domain
Po1 1,3,5-6,8,10,26,33,52,255,783

Port Vlans in spanning tree forwarding state and not pruned
Po1 1,3,5,33,52,255,783


  • Is Sw2 a 3560? There could be differences between the 3550/3560 or IOS versions. My 3550 in my home network uses a 4-port etherchannel to my 2924XL switches:

    3550EMI#sh int po1 etherchannel
    Age of the Port-channel   = 42d:11h:01m:09s
    Logical slot/port   = 1/0          Number of ports = 4
    GC                  = 0x00000000      HotStandBy port = null
    Port state          = Port-channel Ag-Inuse
    Protocol            =    -

    Ports in the Port-channel:

    Index   Load   Port     EC state        No of bits
      0     00     Fa0/21   On/FEC             0
      0     00     Fa0/22   On/FEC             0
      0     00     Fa0/23   On/FEC             0
      0     00     Fa0/24   On/FEC             0

    Time since last port bundled:    42d:11h:01m:04s    Fa0/22

    3550EMI#sh run int f0/21 (f0/22-24 are identical)
    Building configuration...

    Current configuration : 200 bytes
    interface FastEthernet0/21
     switchport trunk encapsulation isl
     switchport trunk allowed vlan 2-4094
     switchport mode trunk
     power inline never
     speed 100
     duplex full
     channel-group 1 mode on

    I manually set the speed and duplex on the ports.

    IOS: Cisco IOS Software, C3550 Software (C3550-IPSERVICESK9-M), Version 12.2(25)SEE, RELEASE SOFTWARE (fc2)

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