I have two ruckus ICX 7250-48 switches, which are stacked. I did not purchase L3-prem license but I have enabled it (#license install perpetual 1 l3-prem). It gave me 60 days of trial days. I need it for L3 features (e.g OSPF). Do I need to buy license after expiration? As I know in old version of firmware features don't disabling after expiration. My version is SPR08090mc.