Max number of units (aeX.Y subinterfaces) supported under a single AE interface?

[VivekMs]

Hi Team,

I’m looking to confirm the maximum number of units (aeX.Y subinterfaces) that can be configured under a single Aggregate Ethernet (AE) interface on Palo Alto firewalls.

Specifically for models like PA-440,PA-450, PA-820, and PA-850, and across recent PAN-OS versions:

• What is the hard platform limit for aeX.Y units per AE?
• Are there any model-specific or PAN-OS–specific differences?
• Any recommended practical limits or best practices from field experience?

I wasn’t able to find a definitive number exposed via CLI (for example, show system state).

Appreciate confirmation or anyone who has validated this in production.

Thanks!

[emr_1]

8 interfaces per AE
https://docs.paloaltonetworks.com/ngfw/networking/configure-interfaces/configure-an-aggregate-interf...

Max num. of AE is here

https://www.paloaltonetworks.com/products/product-comparison?chosen=pa-440,pa-450,pa-820,pa-850