Comcores Ethernet Switch 1G/10G IP core is a highly configurable and size optimized implementation of a non-blocking crossbar switch that allows continuous transfers between up to four (4) 10 Gbps Ethernet XGMII ports and sixteen (16) 1 Gbps GMII interfaces. The switch supports MAC learning, VLAN 802.1Q, and multicast. It implements store-and-forward switching approach in order to fulfill Ethernet standard policy regarding frame integrity checking. Each port provides GMII or XGMII native interface for Ethernet PHY devices. The number of ports is configurable at compile time.