Cisco ACI – Convert Leaf Ports (Uplink to Downlink)

Since ACI release 3.1(1) it’s now possible to use some of the Leaf Uplinks as Downlink Ports. This could help you out if there is a need for some 40/100G ports but you are currently only running 10G Leafs.
Currently the following Leafs support the conversion:

  • N9K-C9348GC-FXP
  • N9K-C93180LC-EX and N9K-C93180YC-FX
  • N9K-93180YC-EX, N9K-C93180YC-EX, and N9K-C93180YC-EXU
  • N9K-C93108TC-EX and N9K-C93108TC-FX
  • N9K-C9336C-FX2 (only downlink to uplink conversion supported)

There are some limitations, check them out on the Cisco Page.

Our use case was to use some of the 40/100G Ports as Downlinks on a N9K-C93180YC-FX. The main limitation there is that the last 2 ports (53 and 54) don’t support conversion, no issue if you use them as Uplinks anyway.

The conversion process is pretty straight forward.
Head to Fabric -> Inventory, open up the respective POD and select your Leaf.

Go to the “Interface” tab and change the mode to “Configuration”

Now select the port you want to change from uplink to downlink and then select “Downlink”.

There will be a popup with the information about the change, “Submit” it.

And that’s it, repeat for all the other interfaces you want to convert. Then reload the Leaf.

Related Posts

2 thoughts on “Cisco ACI – Convert Leaf Ports (Uplink to Downlink)

    • Type “Spine” is for interfaces on Spine switches, it’s active for all ports on a spine 🙂

Leave a Reply

Your email address will not be published. Required fields are marked *