set system ddos-protection protocols l3nhop aggregate bandwidth 2000
but that doesn't seem to impact the throughput.
Accepting that as by design, moved on to trying to figure out how to upload both the MP and T images to the switch. The standard T/P image is ~220MB. The newer MP images are 1.2GB. The traditional location of /var/tmp shows only 880MB of space. We noticed that /.mount/var/tmp had several gigs of space. We had been logging into the switch via and IP/SSH connection and it would always fail at 26% upload when using a local account called "admin" and trying either location.
JTAC suggested to login as root and sure enough (via console), that allowed us to upload both images to /var/tmp. Still trying to understand how that is working based on the displayed available space. I need to figure out how to enable that over my ae that my managment VLAN is traveling over now. Will update when JTAC responds. Sorry if obvious, I've only be using JunOS for 6 months.