Hi,
Link-speed mixed option is not available in 15.1 as well
[edit]
root@EX9214# set interfaces ae5 aggregated-ether-options link-speed ?
Possible completions:
100g Links are 100G
100m Links are 100M
10g Links are 10G
1g Links are 1G
40g Links are 40G
50g Links are 50G
80g Links are 80G
8g Links are 8G
oc192 Links are OC-192
[edit]
root@EX9214# run show version | match junos
Junos: 15.1R6.7