Port-channel mode cannot be changed in a non-empty port-channel

[Shailesh Choubey]

I tried to create a Port channel 30 and aggregated it with eth-1/10 & eth-1/11. Not both physical ports are down, nothing is connected there. When I tried to config "channel-group 30 mode active" in both physical interfaces (eth-1/10 & -1/11) I am getting below error: 

"Port-channel mode cannot be changed in a non-empty port-channel, and port mode must match with port-channel mode".

Now is it something because ports are down ? or something else is missing ? 

Eth1/10         --      eth  routed down    XCVR not inserted        auto(D) 30
Eth1/11         --      eth  routed down    XCVR not inserted        auto(D) --

interface Ethernet1/11
  switchport
  switchport mode trunk
  channel-group 30
  no shutdown

interface Ethernet1/10
  switchport
  switchport mode trunk
  channel-group 30
  no shutdown

--------------------------------------------------------------------------------
Group Port-       Type     Protocol  Member Ports
      Channel
--------------------------------------------------------------------------------
10    Po10(SU)    Eth      LACP      Eth1/39(P)
20    Po20(SU)    Eth      LACP      Eth1/48(P)
30    Po30(SD)    Eth      NONE      Eth1/10(D)   Eth1/11(D)

The thing is I want a LACP lag to bind both physical interfaces (eth-1/10 & -1/11). Please suggest.

[Mark Elsen]

 - Is the configuration of Po30 symmetrical w.r.t the physical ports it uses ?

  M.

[Shailesh Choubey]

Hi Marce,

Here is the configuration for Po30

interface port-channel30
  description ###Towards DNS server###
  switchport
  switchport mode trunk

[Dawei · Accepted solution]

Try this:

N9K(config)# int e1/10-11
N9K(config-if-range)# no channel-group 30
N9K(config-if-range)# channel-group 30 mode active

[Shailesh Choubey]

Hi Dawei,

Thank you so much for the solution, it worked.

Also, is there any other configuration required for LACP for these two physical interfaces, or this is sufficient? 

[Shailesh Choubey]

Here is the configuration for Po30, please suggest if I need to add any config for LACP: 

interface port-channel30
  description ###Towards DNS server###
  switchport
  switchport mode trunk

[Dawei]

No other commands are needed. If you are connecting to a server using this port-channel, you may consider configuring `spanning-tree port type edge trunk`.