On BOTH Aruba switches we need a single route to the TFTP server 10.92.100.60 (your configuration may differ).
This is needed because there are issues with Aruba ECMP hashing and TFTP traffic.
sw-spine-002# show ip route 10.92.100.60
Displaying ipv4 routes selected for forwarding
'[x/y]' denotes [distance/metric]
10.92.100.60/32, vrf default, tag 0
via 10.252.1.9, [70/0], bgp