| Basic functions | Processes 2xGE services. |
| Port types | - EGS2 boards support 1000BASE-SX/LX/ZX/VX Ethernet optical ports. The optical ports support the auto-negotiation function in compliance with IEEE 802.3z. The optical ports use SFP optical modules and support hot swapping. When the multi-mode optical fiber is used, the maximum transmission distance is 550 m. When the single-mode optical fiber is used, the maximum transmission distance is 10 km. The optical modules that can meet different requirements for the transmission distance such as 40 km and 80 km can also be used.
- N3EGS2 boards also support 1000BASE-T Ethernet electrical ports. The electrical ports support the auto-negotiation function. The negotiated rate can be 10 Mbit/s, 100 Mbit/s, or 1000 Mbit/s. N3EGS2 boards support SFP electrical ports and hot swapping. The maximum transmission distance is 100 m.
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| Functions when being used with an interface board | Provides ports on the front panel. |
| Port characteristics | Working modes | - GE electrical port: auto-negotiation, 1000M full-duplex, 100M full-duplex, and 10M full-duplex (only N3EGS2 boards support GE electrical port.)
- GE optical port: auto-negotiation and 1000M full-duplex
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| Traffic control mode at ports | Auto-negotiation mode | Supported |
| Non-autonegotiation mode | Supported |
| Query/Setting of port status | Supported |
| Query of port types | Supported |
| Setting of optical power thresholds | Not supported |
| Pluggable optical module | Supports SFP optical modules. |
| Service categories | EPL service | Supports PORT-based transparent transmission. |
| EVPL service | - Supports PORT-shared EVPL services.
- Supports VCTRUNK-shared EVPL services.
- The services are isolated by VLAN tags.
- The services are isolated by MPLS tags.
- Supports a maximum of 4096 links.
|
| EPLAN service | - Supports the blacklist that can contain 2K records and also the static MAC address table that can contain 2K records. The sum of the number of records in the blacklist and the number of addresses in the static MAC address table must not exceed 2K. The blacklist function of N3EGS2 boards supports verification of destination MAC addresses only.
- Supports the self-learning of the source MAC address. The capacity of the MAC address table is 16K. The aging time of the MAC address can be set and queried.
- Supports the configuration of static MAC routes.
- The maximum number of supported VBs is 2. The maximum number of logical ports for each VB is 30.
- N3EGS2 supports the EPLAN services that are based on the IEEE 802.1d MAC bridge.
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| EVPLAN services | - Supports data isolation based on VB+VLAN.
- The maximum number of supported VBs is 2. The maximum number of logical ports for each VB is 30.
- Supports the setting of a maximum of 4096 VLAN services.
- Supports the EVPLAN services that are based on the IEEE 802.1q virtual bridge.
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| Service specifications | Formats of Ethernet data frames | IEEE 802.3 | Supported |
| Ethernet II | Supported |
| IEEE 802.1 q/p | Supported |
| Frame length range | - Supports the setting of the frame length to a value ranging from 1518 bytes to 9600 bytes.
- Supports a jumbo frame with a maximum length of 9600 bytes.
|
| Concatenation granularities | N2EGS2: VC-12, VC-3, VC-12-Xv (X ≤ 63), VC-3-Xv (X ≤ 12). N3EGS2: VC-12, VC-3, VC-12-Xv (X ≤ 63), VC-3-Xv (X ≤ 24), VC-4-Xv (x ≤ 8). |
| Encapsulation formats | HDLC | Not supported |
| LAPS | Not supported |
| GFP-F | Supported |
| MPLS technology | Supported |
| VLAN technology | Supports a total number of 4094 VLANs, which comply with IEEE 802.1q/p. |
| Maximum uplink bandwidth | The maximum uplink bandwidth is 2.5 Gbit/s. An EGS2 board can adapt to the bandwidth of its slot. |
| Maximum bound bandwidth | N2EGS2: 48xVC-3, or 252xVC-12 + 36xVC-3. N3EGS2: 48xVC-3, or 252xVC-12 + 36xVC-3, 16xVC-4. |
| VCTRUNK specifications | Number of supported VCTRUNKs: 48 Configuration principles are as follows: - Each VC channel can be bound only to one VCTRUNK.
- VCTRUNK1 to VCTRUNK24 must be bound when a board is housed in a slot providing 1.25G bit/s bandwidth.
- A VCTRUNK can be bound with the VC-12 path or VC-3 path at one time. A VCTRUNK should not be bound with VC-12 and VC-3 paths at the same time.
- In the case of N2EGS2 boards, VCTRUNK 1-VCTRUNK 12 can be bound only with lower order paths in VC-4s numbered 1-4. VCTRUNK 13-VCTRUNK 24 can be bound only with lower order paths in VC-4s numbered 5-8. VCTRUNK 25-VCTRUNK 36 can be bound only with lower order paths in VC-4s numbered 9-12. VCTRUNK 37-VCTRUNK 48 can be bound only with lower order paths in VC-4s numbered 13-16.
- In the case of N3EGS2 boards, there is no requirement regarding VCTRUNK binding. One VCTRUNK can be bound with up to 24 VC-3s.
- In the case of N2EGS2 boards, a VCTRUNK can be bound with a maximum of 12 VC-3s or 63 VC-12s.
- In the case of N3EGS2 boards, a VCTRUNK can be bound with a maximum of eight VC-4s, 24 VC-3s, or 63 VC-12s.
- For N2EGS2 board, VC-4s numbered 4, 8, 12, and 16 support the binding of VC-3 and VC-12 paths. The other VC-4s support the binding of VC-3 paths only.
- For N3EGS2 board, VC-4s numbered 4, 8, 12, and 16 support the binding of VC-4, VC-3 and VC-12 paths. The other VC-4s support the binding of VC-4 and VC-3 paths only.
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| Protection schemes | TPS | Not supported |
| BPS | Supported by N3EGS2 boards. |
| PPS | Not supported |
| DLAG | Not supported |
| LAG | Supports manual link aggregation and the load sharing mode that comply with IEEE 802.3ad and IEEE 802.1AX. |
| LCAS | Supports LCAS, which dynamically increases or decreases the bandwidth and protects the bandwidth in compliance with ITU-T G.7042. |
| LPT | - N2EGS2 boards support P2P LPT.
- N3EGS2 boards support P2P LPT and P2MP LPT.
- Complies with proprietary protocol.
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| STP/RSTP | Supports the broadcast packet suppression function and RSTP, which comply with IEEE 802.1w. |
| MSTP | Not supported |
| Synchronization | Synchronous Ethernet | Not supported |
| IEEE 1588v2 | Not supported |
| Maintenance features | ETH OAM | - N2EGS2 boards do not support the ETH OAM function.
- N3EGS2 boards support CC, LB tests, and LT tests in compliance with IEEE 802.1ag, and OAM ping in compliance with proprietary protocol.
- N3EGS2 boards support OAM auto-discovery, remote loopbacks, fault detection, and link performance detection in compliance with IEEE 802.3ah, and selfloop detection in compliance with proprietary protocol.
|
| Test Frame | - N2EGS2 boards supports test frames in Ethernet bearer mode.
- N3EGS2 boards supports test frames in Ethernet bearer mode and GFP bearer mode.
|
| Response to ping | Not supported |
| Port Mirroring | N3EGS2 boards support ingress mirroring. |
| Loopback capability | PHY layer at Ethernet ports | Supports inloops. |
| MAC layer at Ethernet ports | Supports inloops. |
| VC-4 level | Not supported |
| VC-3 level | N2EGS2 boards support inloops and outloops. N3EGS2 boards do not support inloops or outloops. |
| VC-12 level | Not supported |
| RMON | Supports Ethernet performance monitoring at the port level. |
| Warm resets | N2EGS2/N3EGS2 boards support warm resets. If a warm reset is performed on an N2EGS2 board, traffic on the board is interrupted, whereas if a warm reset is performed on an N3EGS2 board, traffic on the board is not interrupted. If an N3EGS2 board substitutes for an N2EGS2 board, traffic on the N3EGS2 board is not interrupted. |
| Cold resets | Supported |
| Alarms and performance events | Reports various alarms and performance events, which facilitates the management and maintenance of the equipment. |
| QoS | - Supports the CAR. The granularity is 64 kbit/s.
- Supports the flow classification based on PORT, PORT+VLAN, or PORT+VLAN+VLAN PRI.
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| IGMP Snooping | Protocol enabling | Supported |
| Port aging time | Supported |
| Fast leave | Supported by N3EGS2 boards NOTE: N3EGS2 boards support the IGMP snooping fast-leave function when they substitute for N2EGS2 boards using the board version replacement function. |
| Discarding of unknown broadcast packets | Supported by N3EGS2 boards |
| Static broadcast entry | Supported by N3EGS2 boards |
| Hub/Spoke | Supported by N3EGS2 boards |
| Traffic control | Supports the port-based traffic control function that complies with IEEE 802.3x. NOTE: Only EPL services support port-based traffic control. |
| Traffic monitoring | N3EGS2 boards support port-based and VCTRUNK-based traffic monitoring. |
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