That works. Not what is in the manual, but....
SH-AGG-670-48p-10g.7 # sh sntpSNTP client is enabled
SNTP time is valid
Primary server:10.90.2.162 VR-Default
Secondary server:
Broadcasts: VR-Mgmt
Query interval:64
Last valid SNTP update: From server:10.90.2.162, on Thu Oct 1 17:53:34 2015