You can connect the S5120-SI series to end users or wiring-closet switches through gigabit Ethernet copper ports, and to Layer 3 switches through gigabit Ethernet fiber-optic ports or link aggregation. The S5120-SI series provides. Page 9 Enabling the spanning tree feature ····················································································································· 76 Performing mCheck. The H3C S5120-SI Series Ethernet Switches are designed to provide high-performance, reliable and scalable network connectivity. They support various features such as Layer 2 and Layer 3 switching, VLANs, QoS, security and more. These switches are suitable for a wide range of applications, including. If needed, configure trusted DHCP servers and ports: Connect to the management console and log in. Configure the ports as trunk: Specify the VLANs for the trunk: Activate the trunk port: Provide administrative access to the switch, usually through a web interface or SSH. H3C,, Aolynk,, H3Care, SecPro, SecPoint, SecEngine, SecPath, Comware, Secware, Storware, NQA, VVG, V G, VnG, PSPT, XGbus, N-Bus, TiGem, InnoVision and HUASAN are trademarks of Hangzhou H3C Technologies Co. Italic text represents arguments that you replace with actual values. Braces enclose a set of required syntax choices.