| Wire speed L2 switching | Switching capacity (Full duplex) | 128 Gbps | 176 Gbps | 128 Gbps | 176 Gbps | 48 Gbps | 96 Gbps | 
| Packet forwarding rate | 95.2 Mpps | 130.9 Mpps | 95.2 Mpps | 130.9 Mpps | 35.7 Mpps | 71.4 Mpps | 
| Power over Ethernet | Not supported | Supported | Not supported | 
| Link aggregation | l   Aggregation of GE ports l   Aggregation of 10GE ports (S5120-24P-EI and S5120-48P-EI do not support) l   Dynamic link aggregation l   Static link aggregation l   Supports up to 128 aggregation groups, each supporting up to eight GE ports or four 10GE ports | 
| Flow control | l   IEEE 802.3x flow control and back pressure | 
| Jumbo Frame | l   Supports maximum frame size of 9 KB | 
| MAC address table | l   16K MAC addresses l   1024 static MAC addresses l   Blackhole MAC addresses l   MAC address learning limit on a port | 
| VLAN | l   Port-based VLANs (4,094 VLANs) l   QinQ and selective QinQ l   Voice VLAN l   Protocol-based VLANs l   GVRP l   MAC-based VLANs l   IP subnet-based VLANs | 
| ARP | l   256 entries l   256 static entries l   Gratuitous ARP l   Standard proxy ARP and local proxy ARP l   ARP Detection | 
| ND | l   256 entries l   256 static entries | 
| VLAN virtual interface | l   8 | 
| DHCP | l   DHCP Client l   DHCP Snooping l   DHCP Relay | 
| UDP Helper | l   UDP Helper | 
| DNS | l   Dynamic domain name resolution l   Dynamic domain name resolution client l   IPv4/IPv6 addresses | 
| IPv4 route | l   32 static routes | 
| IPv6 route | l   32 static routes | 
| IPv4 multicast | l   IGMP (Internet Group Management Protocol) Snooping v1/v2/v3 l   Multicast VLAN l   1024 multicast groups l   Unknown multicast packets dropping | 
| IPv6 multicast | l   MLD Snooping v1/v2 l   IPv6 multicast VLAN l   1024 multicast groups | 
| Broadcast/multicast/unicast storm control | l   Storm control based on port rate percentage l   PPS-based storm control | 
| MSTP | l   MSTP protocol l   16 instances l   STP Root Guard l   BPDU Guard | 
| RRPP | l   RRPP protocol l   Multi-instance RRPP | 
| Smart link | l   Up to 26 groups supported | 
| Monitor link | l   Supported | 
| QoS/ACL | l   Restriction of the rates at which a port sends and receives packets, with a granularity of 64 kbps. l   Packet redirection l   Committed access rate (CAR), with a granularity of traffic limit 64 kbps. l   Eight output queues for each port l   Flexible queue scheduling algorithms based on port and queue, including strict priority (SP), weighted round robin (WRR), and SP + WRR. l   Remarking of 802.1p and DSCP priorities l   Packet filtering at L2 (Layer 2) through L4 (Layer 4); flow classification based on source MAC address, destination MAC address, source IP (IPv4/IPv6) address, destination IP (IPv4/IPv6) address, port, protocol, and VLAN. l   Time range | 
| Mirroring | l   Traffic mirroring l   Port mirroring | 
| Remote mirroring | l   Remote port mirroring | 
| Security | l   Hierarchical management and password protection of users l   AAA authentication l   RADIUS authentication l   HWTACACS+ l   SSH 2.0 l   Port isolation l   Port security l   Centralized MAC address authentication l   IP-MAC-port binding l   IP Source Guard l   Https l   SSL l   PKI ( Public Key Infrastructure ) l   EAD | 
| 802.1X | l   Up to 1,024 users l   Port-based and MAC address–based authentication l   Guest VLAN l   Trunk port authentication l   Dynamic assignment of QoS/ACL/VLAN based on 802.1X | 
| Loading and upgrading | l   Loading and upgrading through XModem protocol l   Loading and upgrading through FTP l   Loading and upgrading through the trivial file transfer protocol (TFTP) | 
| Management | l   Configuration through CLI l   Remote configuration through Telnet l   Configuration through Console port l   Simple network management protocol (SNMP) l   Remote monitoring (RMON) alarm, event and history recording l   iMC NMS l   Web-based network management l   System log l   Hierarchical alarms l   Huawei group management protocol (HGMP) V2 l   NTP l   Power supply alarm function l   Fan and temperature alarms l   IRF( only supported by S5120-C-EI series switches) | 
| Maintenance | l   Debugging information output l   Ping and Tracert l   NQA l   Track l   Remote maintenance through Telnet l   Virtual cable test l   802.1ag l   802.3ah l   DLDP |