gistfile1.txt

#!/usr/bin/env python

DC2_CIDR='1.1.1.1.0/22'
ORD_CIDR='2.2.2.2/22'
EG_CIDR='3.3.3.3/20'
SLC_CIDR='4.4.4.4/22'
LAS_CIDR='5.5.5.5/22'

def datacenter():
    datacenter = {}
    # Some code for logic that sets grains like
    if __salt__['network.in_subnet'](DC2_CIDR):
        return {'datacenter':'dc2'}
    if __salt__['network.in_subnet'](ORD_CIDR):
        return {'datacenter':'ord'}