from: 'permit ip host 10.11.1.1 192.168.100.0 0.0.0.255'
IP pair: '192.168.100.0' '0.0.0.255'
from: 'permit ip host  10.11.1.1 192.168.100.0 0.0.0.255'
IP pair: '10.11.1.1' '192.168.100.0'