This product is either discontinued or we cannot get that from suppliers.
Netgear GSM7228PL-10000S, Hardware Licensing, Upgrade License, Netgear Prosafe GSM7228PS Layer 3 Switch.
Designed for Enterprise networks and core/aggregation levels of SMB networks, L3 upgrades provide advanced routing protocols such as OSPF, VRRP and multicast for converged applications.