* IE4000 series industrial switches integrate rich Ethernet communication protocols such as switching, routing, ring protection and security. * Supports complete Ethernet Layer 2 feature set. Support 802.1Q VLAN, protocol-based VLAN, Voice VLAN, Guest VLAN, QINQ, flexible QINQ and multicast VLAN. STP / RSTP / MSTP, 802.3x flow control protocols; support QoS congestion management; classify and prioritize data to ensure mission-critical data transmission; support LLDP link layer discovery protocol, LACP link aggregation control protocol, DLDP equipment Layer 2 features such as link detection protocol, GARP VLAN registration protocol, and broadcast storm suppression support Layer 2 multicast. * IE4000 series switches support a complete Ethernet Layer 3 feature set. Support IPv4 / IPV6 static routing, support routing interface, support RIP and OSPF (small specifications), support IPv4 and IPv6 dual protocol stacks. Supports IGMP Snooping, DHCP Dynamic Host Configuration Protocol, DHCP Client, DHCP Server, DHCP Snooping, and Dhcp relay option82; Supports DNS domain name resolution system. * IE4000 series switches support RRPP ring network technology. RRPP is a link layer protocol specifically applied to Ethernet rings. It can prevent broadcast storms caused by data loops when the Ethernet ring is complete, and can quickly enable backup links when a link on the Ethernet ring is broken to ensure maximum connectivity of the ring network. Compared with the STP protocol, the RRPP protocol has the following advantages: fast topology convergence (less than 50ms); convergence time has nothing to do with the number of nodes on the ring network; in the intersecting ring topology, changes in one ring topology will not cause other ring topological oscillations , Data transmission is more stable; support load sharing of RRPP ring network, make full use of the bandwidth of the physical link. * IE4000 series switches support a complete set of Ethernet security features. Multi-level security protection mechanism effectively suppresses virus transmission and network traffic attacks. Supports 2-4 layer ACL control, CPU and ARP attack protection, and DoS attack protection. IEEE 802.1x supports port-based dynamic security and provides user authentication. TACACS + and RADIUS authentication provide centralized control of the switch and prevent unauthorized users from changing the configuration. Supports rapid deployment of endpoint admission control (EAD). Support the validity verification of SAVI source address under IPV6 environment.