Odd Etherchannel warning

[jamie.burch]

While booting a new 3650 switch running Denali 16.3.1, I noticed an error message I have not seen before:

Warning: adding member TenGigabitEthernet1/1/4 without policy will cause inconsistency with port TenGigabitEthernet1/1/3 in ether channel 1.

I haven't been able to find any info on what this warning might mean.  This happened while the switch is completely unplugged, sitting on my desk for initial configuration.  For reference, here are the configs of the etherchannel and its member interfaces:

interface Port-channel1
description C45-W1A-001
switchport mode trunk
switchport nonegotiate
ip dhcp snooping trust

!

interface TenGigabitEthernet1/1/3
description C45-W1A-001
switchport mode trunk
switchport nonegotiate
ip flow monitor Solarwinds-Input input
ip flow monitor Solarwinds-Output output
channel-group 1 mode desirable
service-policy input AutoQos-4.0-Trust-Cos-Input-Policy
service-policy output AutoQos-4.0-Output-Policy
ip dhcp snooping trust
!
interface TenGigabitEthernet1/1/4
description C45-W1A-001
switchport mode trunk
switchport nonegotiate
ip flow monitor Solarwinds-Input input
ip flow monitor Solarwinds-Output output
channel-group 1 mode desirable
service-policy input AutoQos-4.0-Trust-Cos-Input-Policy
service-policy output AutoQos-4.0-Output-Policy
ip dhcp snooping trust

[brselzer · Accepted solution]

Hello,

The message is expected:

http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3850/software/release/3se/qos/configuration_guide/b_qos_3se_3850_cg/b_qos_3se_3850_cg_chapter_011.html#concept_1B88D96BE633433893CBB45C29EAC6BE

"On attaching a service policy to an EtherChannel, the following message appears on the console: ' Warning: add service policy will cause inconsistency with port xxx in ether channel xxx. '. This warning message should be expected. This warning message is a reminder to attach the same policy to other ports in the same EtherChannel. The same message will be seen during boot up. This message does not mean there is a discrepancy between the EtherChannel member ports."

However, auto QoS is not supported on etherchannel members so keep an eye on it to make sure it is working as you expect it to:

"Auto QoS is not supported on EtherChannel members."

[jamie.burch]

Thanks for the response, this does seem to explain why we are seeing the message.  Interestingly, we have the same configuration on several switches running IOS XE 3.3.5SE and 3.6.4E which do not generate this error message.  The only time I have ever seen this message is on Denali, both 16.2.2 and 16.3.1.