LACP Etherchannel between 4500X and 6807 Catalyst switches

[sina.naser]

Hi Everyone,

I wanna configure LACP etherchannel between 4500X and 6807 Catalyst switches. But it does not work. The etherchannel is L2 and has 4 10G ports. BTW mode on works successfuly. But it's not desired. both switches are VSS pair. I upgraded both switches to Cisco suggested IOS-XE version but the problem didn't solved.

I tried all order of configuraion:

• First create port-channel and then add channel-group under physical
• And vice versa: Add channel-group command under physical interface and then configuring the port-channel

In both cases the 'sh etherc su' command show me suspended state.

Any idea might help.

Tnx in advance

[Georg Pauwen]

Hello,

most likely you are trying to build the port channel between non-compatible modules. What cards are you using for the port channel ?

You can also try:

VSS(config)# interface port-channel X

VSS(config-if)# no mls qos channel-consistency

[sina.naser]

the linecard of 6807 switch that I use for etherchannel is C6800-8P10G-XL

[Georg Pauwen]

Hello,

the switch logs should tell you why the ports are not bundling. do you see anything in there ?

What if you configure:

no port-channel standalone-disable

Do all individual interfaces remain suspended ?

[sina.naser]

After this command the output of 'sh etherc su' indicates 'I' not suspended

[paul driver]

Hello
Are these directly connected or interconnected via fibre risers?
Have you tried using statc PC or even PAGP instead of LACP

[sina.naser]

They are connected through LC-LC patch panel. Mode on (static) port-channel works without problem. B\the problem is with LACP and PAGP

[Georg Pauwen]

Hello.

it probably has something to do with the switch virtual domain/switch virtual link config. What do you have configured under the port channel interfaces and the VSS member switches ?

[sina.naser]

They are all default configuration. Nothing special.

[paul driver]

Hello @sinaa._.ak 
I do remember having the same issue myself in which the PC didn’t come up when using link aggregation negotiation,  I did manage to fix but I cannot think how!
Would you be able to share the PC configuration for both the 6500/4500 PC please, maybe that would jog my memory?

Just one thing, have you manually stipulated the LACP protocol on the physical interfaces?
int x/x
channel-protocol LACP

[sina.naser]

hi

'channel-protocl LACP' does not solved the issue.

[paul driver]

Hello
Can you share your present interface and port-channel configuration also the output from the following:
show etherchannel detail
show etherchannel load-balance
show etherchannel port-channel
show lacp neighbor
show lacp sys-id
debug lacp

[EthanIsenberg75263]

Please reply with the solution as I might be having this same problem