Converting leaf port from Uplink to Downlink

[Netzwerker]

for some porposes (exp: FEX 40G-> leaf 40G) , we have to convert leaf uplink port to downlink in a production environnement. Is there any risk? Is it recommended? 

[balaji.bandi]

check some reference : some of the limitation mentioned in cicso page referring :

https://www.richardstrnad.ch/2018/10/01/cisco-aci-convert-leaf-uplink-to-downlink/

[Robert Burns]

Anytime you reconfigure an interface from Uplink <> downlink it will require the switch to reboot to take effect.  

Robert

[Netzwerker]

OK thanx Roberts! Please can we use spine port1/34 (1G/10G) for connection to the IPN (Remote Leaf scenario) ?

[Robert Burns]

Well I don't know the model of Spine you're referring to, but typically yes, any port on the Spine can be used for IPN/ISN connections.

Robert

[Netzwerker]

Spine model is N9332C! I think it's ok.

In my IPN dhcp relay,  I can see the DHCP DISCOVER received from the Remote Leaf and transmitted to the  APICs (Routable IP) but can not see the DHCP OFFER from the APICs! I'm sure that we did the correct configuration in the APIC.

you can the dhcp stats in the attached capture.

Our topology: Spine -> ASR9901 -> Remote Leaf