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Community Member

Auto QOS on etherchannel

Hi,

How do I enable QOS on an Etherchaneel between A Cisco 3560 and A Cisco3750G

Configuring Auto QOS clearly not allowed after putting the interface in a port-channel

The Port-channel interface has no auto or mls options

Configuring auto QOS on the interface before putting the into a port-channel seems to

work just fine.

Is this the way to go ?

Is QOS actually working on the etherchannel ?

How can I tell.

Thanks.

Wijnand

Auto QOS command on interface after joining a Channel-Group

Switch03(config-if-range)#int range gi0/1-2

Switch03(config-if-range)#description Etherchannel uplink to Core

Switch03(config-if-range)#channel-group 1 mode active

Switch03(config-if-range)#auto qos voip trust

Creating a port-channel interface Port-channel 1

AutoQoS Error: AutoQoS can not be configured on member port(s) of a port-channel

Auto QOS command on interface before joinina channel-Group

The QOS config is showing up in the Gi0/1 interface even after joining the Channel group

Switch03(config)#interface range gi0/1-2

Switch03(config-if-range)#description Etherchannel uplink to Core with QOS

Switch03(config-if-range)#auto qos voip trust

Switch03(config-if-range)#channel-group 1 mode active

Creating a port-channel interface Port-channel 1

Switch03(config)#int port-channel 1

Switch03(config-if)#switchport trunk encapsulation dot1q

Switch03(config-if)#switchport mode trunk

Switch03(config-if)#switchport trunk native vlan 2

Switch03#sh etherchannel summary

Group  Port-channel  Protocol    Ports

------+-------------+-----------+-----------------------------------------------

1      Po1(SU)         LACP      Gi0/1(P)    Gi0/2(P)   

witch03#sh run int gi0/1

Building configuration...

Current configuration : 322 bytes

!

interface GigabitEthernet0/1

description Etherchannel uplink to Core with QOS

switchport trunk encapsulation dot1q

switchport trunk native vlan 2

switchport mode trunk

srr-queue bandwidth share 10 10 60 20

queue-set 2

priority-queue out

mls qos trust cos

auto qos voip trust

channel-group 1 mode active

end

Switch03#sh run interface port-channel 1

Building configuration...

Current configuration : 124 bytes

!

interface Port-channel1

switchport trunk encapsulation dot1q

switchport trunk native vlan 2

switchport mode trunk

end

3 REPLIES
Green

Auto QOS on etherchannel


Looking your HHH configuration this isd the correct way to configure
Interfaces on an etherchannel (port channel).

You configure the auto qos on the physical ports not the port-channel

Look at this link (IOS 12.2.55)
http://www.cisco.com/en/US/partner/docs/switches/lan/catalyst3560/software/release/12.2_55_se/configuration/guide/swqos.html#wp1689696

Policing Guidelines

!
! SNIP
!
•If you have EtherChannel ports configured on your switch, you must configure QoS classification, policing, mapping, and queueing on the individual physical ports that comprise the EtherChannel. You must decide whether the QoS configuration should match on all ports in the EtherChannel.

!
!SNIP
!

HTH
Regards
Alex

Regards, Alex. Please rate useful posts.
Community Member

Auto QOS on etherchannel

Thanks for the answer,

I'm gonna read the chaper you mentioned and put it in production in a couple of weeks.

Kind regards,

Wijnand

Green

Auto QOS on etherchannel

Hi Wijnand

Might be a good idea to look at the configuration guide for your exact IOS

I just picked 12.2.55 at random.

I cant see there being much variation is QOS/AUTO-QOS for ether-channels.

You always QOS the physical interface not the Port-channel

HTH

Regards

Alex

Please rate useful posts

Regards, Alex. Please rate useful posts.
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