Whats this port channel error

[mahesh18]

Hi,

I have seen this in device logs

extende: %EC-SP-5-CANNOT_BUNDLE2: Gi2/6 is not compatible with Po5 and will be suspended (vlan mask is different)
extende: %EC-SP-5-CANNOT_BUNDLE2: Gi2/7 is not compatible with Po5 and will be suspended (vlan mask is different)
extende: %EC-SP-5-CANNOT_BUNDLE2: Gi3/7 is not compatible with Po5 and will be suspended (vlan mask is different)
extende: %EC-SP-5-CANNOT_BUNDLE2: Gi3/8 is not compatible with Po5 and will be suspended (vlan mask is different)
extende: %EC-SP-5-CANNOT_BUNDLE2: Gi4/7 is not compatible with Po5 and will be suspended (vlan mask is different)
extende: %EC-SP-5-CANNOT_BUNDLE2: Gi1/6 is not compatible with Po5 and will be suspended (vlan mask is different)
extende: %EC-SP-5-CANNOT_BUNDLE2: Gi1/7 is not compatible with Po5 and will be suspended (vlan mask is different)
extende: %EC-SP-5-CANNOT_BUNDLE2: Gi2/6 is not compatible with Po5 and will be suspended (vlan mask is different)

can someone explain what does this  mean right now port channel 5 has

5      Po5(SU)         PAgP      Gi1/6(P)   Gi1/7(P)   Gi2/6(P)   Gi2/7(P)
                                 Gi3/7(P)   Gi3/8(P)   Gi4/7(P)   Gi4/8(P)
many thanks

mahesh

[spremkumar]

hi mahesh

can you post the interface configs of the both the physical interface and the port channel interface? do post both end configs.

regds

[mahesh18]

Hi all,'

here is info

interface Port-channel5
description Port-Channel Connection to  G1/6-7,G2/6-7,3/7-8,4/7-8
switchport
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 5,70,76,77,287,800,1087
switchport mode trunk
no ip address

interface GigabitEthernet2/6
description Port Channel 5  Connection to  G1/6-7,G2/6-7,3/7-8,4/7-8
switchport
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 5,70,76,77,287,800,1087
switchport mode trunk
no ip address
udld port aggressive
channel-group 5 mode desirabl

[the-lebowski]

I think you forgot to include some more ports.  Port-channels usually have more than 1 port assigned to them.  And each port can have different configurations which can and will cause problems.

Can you post all the configurations for all the ports in your port-channel?

[mahesh18]

Hi

here is info

interface GigabitEthernet2/6
description Port Channel 5  Connection to G1/6-7,G2/6-7,3/7-8,4/7-8
switchport
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 5,70,76,77,287,800,1087
switchport mode trunk
no ip address
udld port aggressive
channel-group 5 mode desirable
end

Current configuration : 290 bytes
!
interface GigabitEthernet3/7
description Port Channel 5 connection to  G1/6-7,G2/6-7,3/7-8,4/7-8
switchport
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 5,70,76,77,287,800,1087
no ip address
udld port aggressive
channel-group 5 mode desirable
end

Current configuration : 290 bytes
!
interface GigabitEthernet3/8
description Port Channel 5 connection to G1/6-7,G2/6-7,3/7-8,4/7-8
switchport
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 5,70,76,77,287,800,1087
no ip address
udld port aggressive
channel-group 5 mode desirable
end

interface GigabitEthernet1/6
description Port Channel 5 connection to G1/6-7,G2/6-7,3/7-8,4/7-8
switchport
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 5,70,76,77,287,800,1087
switchport mode trunk
no ip address
udld port aggressive
channel-group 5 mode desirable
end

interface GigabitEthernet1/7
description Port Channel 5 connection to  G1/6-7,G2/6-7,3/7-8,4/7-8
switchport
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 5,70,76,77,287,800,1087
switchport mode trunk
no ip address
udld port aggressive
channel-group 5 mode desirable
end

interface GigabitEthernet2/7
description Port Channel 5 connection to  G1/6-7,G2/6-7,3/7-8,4/7-8
switchport
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 5,70,76,77,287,800,1087
switchport mode trunk
no ip address
udld port aggressive
channel-group 5 mode desirable
end

interface GigabitEthernet4/7
description Port Channel 5 connection to G1/6-7,G2/6-7,3/7-8,4/7-8
switchport
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 5,70,76,77,287,800,1087
no ip address
udld port aggressive
channel-group 5 mode desirable
end

interface GigabitEthernet4/8
description Port Channel 5 connection to G1/6-7,G2/6-7,3/7-8,4/7-8
switchport
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 5,70,76,77,287,800,1087
no ip address
udld port aggressive
channel-group 5 mode desirable
end

5      Po5(SU)         PAgP      Gi1/6(P)   Gi1/7(P)   Gi2/6(P)   Gi2/7(P)
                                 Gi3/7(P)   Gi3/8(P)   Gi4/7(P)   Gi4/8(P)

[the-lebowski]

Is that all one switch?  If so that looks ok to me.

If that is one switch it would be helpful to see the other end of the channel as well.

[arjmenon · Accepted solution]

Can you check the config's again on the port-channel and the physical interfaces ? 
Specifically the "allowed VLANs" 

If it is verified, can you remove the configuration by defaulting the interfaces and just add
the "allowed VLANS" line to the port-channel directly (without going into indvidual physical 
interfaces)

Cheers,
ARjun

[the-lebowski]

Looks as though a vlan was allowed on a specific interface in the group and not to the channel itself?

[mahesh18]

hi,

i check and pasted the config .

vlan allowed are same

[jace.mortensen]

Found this in a critical moment during a Police Dept upgrade.  Solved my troubles.  Thank you all.

[Mahesh Gohil]

Hi mahesh,

The probable reason of this message is different set of vlans allowed in etherchannel and port bind to EC.

If you can post config then we can conclude the exact reason of this message.

Also I would like to have a look at below post with very healthy discussion

https://supportforums.cisco.com/thread/2001537.pdf;jsessionid=3A7FF62C515F7BF502B8B99F0DD3B5B6.node0

Regards

Mahesh

[Mahesh Gohil]

Hi mahesh,

I have tried the the same and after removing below command from interface i no longer receiving such log messages

"udld port aggressive"

Also please let me know

1- is this running EC

2- r u getting this message continously

2- you got this messages when you tried to add some more ports in existing etherchannel (because few etherchannel log message look like error but it is not really error...like when you add new port to etherchannel that port first goes to suspended mode for few sec. and generate error message)

Regards

Mahesh

[jacyu2]

Hi Mahesh,

The configuration of all member ports are not the same. You could "default interface xx" and then configure all of them with rage command to make sure they have identical configure as following,

default interface int Gx/x

interface range int Gx/x, Gx/x,...

Regards,

Jack

[mahesh18]

Hi all,

issue is fixed now.

logs just showed  error once.

i remove and add the port channel config and then the message came that all is ok.

thanks for help everyone

regards

mahesh

[teljxr1]

All.. Something to note:

- Ensure that on port-channel Vlan mismatches, port-channel configurations must match what is being 'trunked' to other switches/routers to avoid the 'vlan-mismatch' error.

Also note that for some reason, when one manually adds trunk commands with allowed Vlans, if any of the configurations between switches and/or routers, and there is a Vlan mismatch, the OS will NOT catch this on the log (probably a minor bug) for some reason.  However, the symptom will show when one attempts to 'ping' an IP address on the Vlan being trunked and the ping replies are intermittent.