| Basic Functions | Handles 4-way FE services. |
| Interface type | 10BASE-T/100BASE-TX, meets IEEE 802.3u standard. |
| Match with the outlet panel | Adopts the panel direct outlet to access 4-channel FE Ethernet signals. |
| Interface Characteristics | Working Mode | Support self-negotiation, 100M full-duplex, 100M half-duplex, 10M full-duplex, 10M half-duplex. |
| Port Flow Control Mode | Self-negotiation | Support |
| Non-self-negotiation | Supported |
| Port Status Query/Configuration | Supported |
| Interface Type Query | Support |
| Optical Power Threshold Setting | Not supported |
| Pluggable Optical Module | Not supported |
| Service Type | EPL | Supports PORT-based transparent transport. |
| EVPL | Supports EVPL service with shared PORT. Supports EVPL service with shared VCTRUNK. Supports up to 4096 LINK services.
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| EPLAN | N2EFS4/N3EFS4 supports EPLAN services based on IEEE 802.1d MAC bridge. Maximum support 2K blacklists and 2K static MAC addresses, shared 2K. blacklists on N3EFS4 boards only support destination MAC address checksums, not source MAC address checksums. Support source MAC address self-learning function, MAC address table size is 16k, support MAC address aging time setting and query. Supports static MAC routing configuration. N2EFS4/N3EFS4 supports dynamic MAC address query.N1EFS4 does not support dynamic MAC address query. The maximum number of VBs supported is 16, and the maximum number of logical ports per VB is 30. Supports querying the number of actual learned MAC addresses by VB+VLAN or VB+LP.
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| EVPLAN | Supports data isolation based on VB+VLAN method. The maximum number of VBs supported is 16, and the maximum number of logical ports per VB is 30. Supports the setting of up to 4096 VLAN services. Supports EVPLAN services based on IEEE 802.1q Virtual Bridge. N3EFS4 also supports EVPLAN services based on IEEE 802.1ad Provider Bridge.
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| Service Specifications | Ethernet Data Frame Format | IEEE 802.3 | Supported |
| Ethernet II | Supported |
| IEEE 802.1 q/p | Supported |
| Frame Length Range | Support 1518Byte～9600Byte message length setting, support Jumbo frames up to 9600Byte. |
| Mapping Method | VC-12, VC-3, VC-12-Xv (x≤63), VC-3-Xv (x≤12) |
| Encapsulation Format | HDLC | Not supported |
| LAPS | Not supported |
| GFP-F | Supported |
| MPLS Technology | Supported |
| VLAN Technology | Supports 4094 VLAN tags, VLAN technology meets IEEE 802.1q/p standard. |
| Maximum Uplink Bandwidth | The maximum uplink bandwidth of N1EFS4 is 622Mbit/s. The maximum uplink bandwidth of N2EFS4 and N3EFS4 is 1.25Gbit/s. Slot bandwidth adaption is supported.
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| Maximum Bound Bandwidth | |
| VCTRUNK Specifications |
Quantity: Configuration Features: After a VC channel of each level is used by one VCTRUNK binding, other VCTRUNKs can no longer be used. N2EFS4 and N3EFS4 slots with a bandwidth of 622M bit/s need to be bound to use VCTRUNK1 to VCTRUNK12. The same VCTRUNK can only bind one level of channel, and cannot bind both VC-12 and VC-3 channels. VCTRUNK1 to VCTRUNK12 can only bind low-order services of 1 to 4 VC-4 channels, and VCTRUNK13 to VCTRUNK24 can only bind low-order services of 5 to 8 VC-4 channels. Each VCTRUNK can bind up to 12 VC-3s or 63 VC-12s. The two VC-4s, 4 and 8, can be bound as both VC-3 and VC-12 channels, while the other VC-4s can only be bound as VC-3 channels.
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| Protection Methods | TPS | Not supported |
| BPS | Not supported |
| PPS | Not Supported |
| DLAG | Not supported |
| LAG | N1EFS4 is not supported, N2EFS4/N3EFS4 supports manual link aggregation and load sharing, and meets IEEE 802.3ad and IEEE 802.1AX standards. |
| LCAS | Not supported by N1EFS4. N2EFS4/N3EFS4 is supported, which can realize dynamic increase, dynamic decrease and protection functions of bandwidth, and satisfy ITU-T G.7042 standard. |
| LPT | N1EFS4 supports point-to-point LPT. N2EFS4/N3EFS4 supports point-to-point and point-to-multipoint LPT. LPT meets Huawei's internal protocol standards. |
| STP/RSTP | Supports the broadcast message suppression function and fast spanning tree protocol, and meets the IEEE 802.1w standard. |
| MSTP | does not support |
| Synchronization | Synchronous Ethernet | Not supported |
| 1588v2 | Not supported |
| Maintenance Features | ETH OAM | N1EFS4 is not supported. N2EFS4 and N3EFS4 support CC, LB, and LT to meet the IEEE 802.1ag standard; they support OAM_Ping to meet Huawei's internal protocol standard. N2EFS4 and N3EFS4 support OAM auto-discovery, remote loopback, fault detection, and link performance monitoring to meet the IEEE 802.3ah standard; they support self-loop detection to meet Huawei's internal protocol standard.
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| Test Frames | |
| Response Ping Function | Does not support |
| Port Mirroring | N3EFS4 supports incoming port mirroring. |
| Loopback Capability | Ethernet port PHY layer | Supports inner loopback |
| Ethernet port MAC layer | Supports inner loopback |
| VC-4 level | Not supported |
| VC-3 level | N1EFS4/N2EFS4 supports inner loopback and outer loopback, N3EFS4 does not. |
| VC-12 level | Not supported |
| RMON | Supports port-level Ethernet performance monitoring. |
| Soft Reset | N1EFS4 supports soft reset, and soft reset interrupts service.N2EFS4 and N3EFS4 support soft reset, and soft reset does not affect service. When N2EFS4/N3EFS4 is compatible to replace N1EFS4, soft reset is supported and soft reset does not affect service. |
| Hard reset | Support |
| Alarm and Performance | Provides rich alarms and performance events for easy device management and maintenance. |
| QoS | Supports CAR with a granularity of 64kbit/s. N1EFS4 supports service classification based on PORT, PORT+VLAN, and PORT+VLAN PRI. N2EFS4 and N3EFS4 support flow classification based on PORT, PORT+VLAN, PORT+VLAN+VLAN PRI. N3EFS4 also supports PORT+SVLAN-based flow classification.
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| IGMP Snooping | Protocol Enablement | Supports |
| Port Aging Time | Support for |
| Fast Leave | Not Supported |
| Unknown Multicast Message Discard | Not Supported |
| Static multicast table entries | Not supported |
| Hub/Spoke | Not supported |
| Flow Control | Port-based IEEE 802.3x flow control is supported. Description: Only EPL services support port-based flow control. |
| Traffic Monitoring | N3EFS4 supports port and VCTRUNK based traffic monitoring. |
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