01-22-2012 06:20 AM - edited 03-16-2019 09:08 AM
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
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
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
01-22-2012 07:29 AM
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
01-23-2012 05:31 AM
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
01-23-2012 05:55 AM
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
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