Category Archives: Cisco APIC

Little Gotcha with APICs within ACI

This applies to versions of APIC controller software up to 1.1(4e)

Turns out the there is a bug that occurs when you connect an APIC to multiple leaves.  And yes that is stupid because you’re supposed to connect them to different leaves.  This bug manifests itself when integrating the VMM with the fabric.

Just be sure that you create an APIC policy in the policy groups. Fabric>Access Policies>Interface Policies>Policy Group

It’s a simple policy mine is:
CDP= Disabled
L2 Interface Policy= default

Then bind the policy to the leaves that the APIC’s are connected to.  Fabric>Access Policies>Interface Policies>Profiles>Leaf###.  The click the plus sign (+) and add in your newly created APIC Policy group for the interfaces that the APIC is connected to.

How to get code onto the APIC when the GUI upload fails

The following process worked when the GUI upload via http or scp failed for the 3.8GB APIC ISO file.

If SCP fails (or stalls), what you can do is use a program like Filezilla to connect to the APIC as admin and upload the image directly.

Once the image is in the admin’s home directory, you need to issue the command “firmware add <image_name>”. This adds the file to the firmware repository and should be seen in the GUI as well.

Can’t log into your APIC?

I ran into a split fabric issue setting up my test lab and got the following error trying to log into my 2nd APIC:

REST Endpoint user authorization datastore is not initialized – Check Fabric Membership Status of this fabric node

I was able to get logged into the APIC with the follow username and a blank password:


NOTE: as in the past physical access to a Cisco device equal total ownership.

Basically when installing the fabric for the 1st time you should only power on 1 APIC and discover the entire fabric, then add the other APICs 1 at a time.

How to find your ACI fabric serial numbers

Let’s say you need to open a TAC case and didn’t document all the serial numbers of your fabric upon installation.  You can get the membership information from the command line.

SSH to your APIC OOB management address and log in.

Then issue the following command:
acidiag fnvread

you will get output simular to the following:

For spines and Leaves

admin@apic1:~> acidiag fnvread
ID Name Serial Number IP Address Role State LastUpdMsgId
101 Leaf1 SALXXXXXXXX leaf active 0
102 Spine1 SALXXXXXXX spine active 0
103 Spine2 SALXXXXXXX spine active 0

For APIC’s

admin@apic1:~> acidiag verifyapic
openssl_check: certificate details
subject= CN=FCH1922V0L4,serialNumber=PID:APIC-SERVER-M1 SN:FXXXXXXXX
issuer= CN=Cisco Manufacturing CA,O=Cisco Systems
notBefore=Jul 14 14:52:07 2015 GMT
notAfter=Jul 14 15:02:07 2025 GMT
openssl_check: passed