Help configuring LACP on the 6509

Answered Question
Dec 22nd, 2010
User Badges:

Hi,


I am currently setting up a LACP port-channel on the Cisco 6509 (SUP720-3BXL with the following modules:


NAME: "6", DESCR: "WS-X6348-RJ-45 48 port 10/100 mb RJ45 Rev. 6.1"
PID: WS-X6348-RJ-45    , VID:    , SN: XXXXXXXXXXX


NAME: "7", DESCR: "WS-X6548-RJ-45 SFM-capable 48-port 10/100 Mbps RJ45 Rev. 6.1"
PID: WS-X6548-RJ-45    , VID:    , SN: XXXXXXXXXXX


The config:


Building configuration...


Current configuration : 242 bytes
!
interface FastEthernet6/20
switchport
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 42,100,101
switchport mode trunk
no ip address
speed 100
duplex full
channel-protocol lacp
channel-group 20 mode passive
end


c6509_testlab#sh run int fa7/20
Building configuration...


Current configuration : 242 bytes
!
interface FastEthernet7/20
switchport
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 42,100,101
switchport mode trunk
no ip address
speed 100
duplex full
channel-protocol lacp
channel-group 20 mode passive
end


The switch immediately gives a error message:

2d02h: %EC-SP-5-CANNOT_BUNDLE_LACP: Fa7/20 is not compatible with aggregators in channel 20 and cannot attach to them (qos-disallowed card type combination: Fa7/20 and Fa6/20)
2d02h: %EC-SP-5-CANNOT_BUNDLE_LACP: Fa6/20 is not compatible with aggregators in channel 20 and cannot attach to them (qos-disallowed card type combination: Fa6/20 and Fa7/20)


However, the port-channel comes up but also spawns a secondary interface Port-channel20A.


What I'll like to know is, what does the error message (underlined in red) mean? And is there a way to get rid of the secondary port-channel?


If all it takes is for both cards to be the same model, that would be easy, but if it's configuration related, what should I look out for?


If more information is needed I'll be happy to provide. Thanks in advance.

Correct Answer by Lei Tian about 6 years 6 months ago

Hi,


Add 'no mls qos channel-consistency' under port-channel; that will ignore the qos capability check across different module.



HTH,

Lei Tian

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Correct Answer
Lei Tian Wed, 12/22/2010 - 03:11
User Badges:
  • Cisco Employee,

Hi,


Add 'no mls qos channel-consistency' under port-channel; that will ignore the qos capability check across different module.



HTH,

Lei Tian

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