Can't get a ACI APIC controller to recommission - Help Please

[Del Murphy]

OK, I've beaten my head against the wall on this one for a while now, so I'm asking for help.

I have an ACI environment about a year or so ago I needed to expand it from a single POD to a Multipod deployment. I had the bright idea of decommissioning one of the three APIC controllers and adding it to the second POD.

I have it connected to a set of leafs in POD 2, but can't get the thing to recommission into the fabric. I have reset the controller like six times with the following commands:

acidiag touch clean

acidiag touch setup

acidiag reboot

I have the APIC configured with the same TEP address space at POD 1, the same Fiber Name as POD 1 the same Infr VLAN as POD 1, only the POD ID is different with it set to POD ID 2.

When I log in to APIC controller 1 and select SYSTEM|Controllers|Controllers|apic1|Cluster as seen by Node

it shows apic3 as out of service unregistered with a health state of never know. I have right-clicked and selected commission with no change.

On Leaf 201 and 202 in POD 2 that the APIC controller is attached to under Fibric | inventory the interface shows as orange with a switching state of disabled. I have enabled and reset the port with no change.

The ports oper State and Admin State are up and green. The link light is green. I'm at a loss for what to do to fix this.

[RedNectar]

@rschulting 

Ah - didn't realise that you were not the original poster of this question.

[Del Murphy]

That is how it is supposed to work. My install decided that wasn't the plan. I have gone through those steps without luck. Thanks for the reply.

[rschulting]

Well I had sort of the same experience, I was monitoring the Leaf switchport after the change and nothing happened. It took at least a minute or more before I saw the switch state change to green, after that it took many minutes as well before Apic3 became "Fully Fit". I also think you have to give it some time when you decommission the Apic3, it takes a while before you see it unconfigured in the dashboard.

Hope this helps...

[jafehi000]

Hello, 

The switching state getting disabled was due to the LLDP process between the leaf and the APIC was not established to put the APIC in the right epg--''Controller epg'' to be precised which has specific vlan tag and that will make the leaf switches to apply relevant policy for controllers epg.. If the issue still persists I will recommend the follow:

1. ensure LLDP is not enabled on the CIMC

2. Ensure layer 1 connectivity is established between the leaf switches and the APIC... You can re-attemp to bring it online via as a a standby APIC to rule out layer 1 connectivity

3. If your APIC is new generation, enable port channel on the CIMC and enusre port 1 and 3 are connected sequentially to the leaf switches...

Let me know how it goes