| Basic functions | Receives/Transmits and processes 4xGE services. |
| Port types | - EGS4 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. 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.
- N1EGS4 and N4EGS4 boards also support 1000BASE-T Ethernet
electrical ports. The electrical ports support the auto-negotiation
function. N1EGS4 boards support the negotiated rate of 1000 Mbit/s
and N4EGS4 boards support the negotiated rate of 10 Mbit/s, 100
Mbit/s, or 1000 Mbit/s. N1EGS4 and N4EGS4 boards support SFP
electrical ports and hot swapping. The maximum transmission
distance is 100 m.
|
| Functions when being used with an interface board | Provides ports on the front panel. |
| Port characteristics | Working modes | - GE electrical port (N1EGS4): auto-negotiation, 1000M full-duplex.
- GE electrical port (N4EGS4): auto-negotiation, 1000M full-duplex,
100M full-duplex, and 10M full-duplex.
- GE optical port: auto-negotiation and 1000M full-duplex.
NOTE:Only on N1EGS4 and N4EGS4 boards support GE electrical port. |
| 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 QinQ tags.
- Supports a maximum of 8000 links.
|
| EPLAN service | - Supports the blacklist that can contain 512 records and also the
static MAC address table that can contain 512 records. The
blacklist function supports verification of destination MAC
addresses only.
- Supports the self-learning of the source MAC address. The capacity
of the MAC address table is 128K. The aging time of the MAC address
can be set and queried.
- Supports the configuration of static MAC routes.
- Supports the query of dynamic MAC addresses.
- N1EGS4/N3EGS4 supports a maximum of two VBs. The maximum number of
logical ports for each VB is 68.
- N4EGS4 supports a maximum of 16 VBs. The maximum number of logical
ports for each VB is 68.
- Queries the number of actually learned MAC addresses based on
VB+VLAN or VB+LP.
- Supports the EPLAN services that are based on the IEEE 802.1d MAC
bridge.
NOTE:EGS4 boards support SVL and IVL modes. Ensure that all bridges on a
board apply the same learning mode. |
| EVPLAN service | - Supports data isolation based on VB+VLAN.
- N1EGS4/N3EGS4 supports a maximum of two VBs. The maximum number of
logical ports for each VB is 68.
- N4EGS4 supports a maximum of 16 VBs. The maximum number of logical
ports for each VB is 68.
- Supports the setting of a maximum of 4000 VLAN services.
- Supports the EVPLAN services that are based on the IEEE 802.1q
virtual bridge and IEEE 802.1ad provider bridge.
NOTE:EGS4 boards support SVL and IVL modes. Ensure that all bridges on a
board apply the same learning mode. |
| Service specifications | Formats of Ethernet data frames | IEEE 802.3 | Supported |
| Ethernet II | Supported |
| IEEE 802.1 q/p | Supported |
| Frame length range | N1EGS4/N3EGS4: - Supports the setting of the frame length to a value ranging from
1518 bytes to 9216 bytes.
- Supports a jumbo frame with a maximum length of 9216 bytes.
N4EGS4: - 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 | VC-12, VC-3, VC-4, VC-12-Xv (X ≤ 64 (N1EGS4/N3EGS4)), VC-12-Xv (X ≤
63 (N4EGS4)), VC-3-Xv (X ≤ 24), and VC-4-Xv (X ≤ 8). |
| Encapsulation formats | HDLC | Supported |
| LAPS | Supported |
| GFP-F | Supported |
| MPLS technology | Not supported |
| VLAN technology | Supports a total number of 4094 VLANs, which comply with IEEE
802.1q/p. |
| Maximum uplink bandwidth | 2.5 Gbit/s |
| Maximum bound bandwidth | - N1EGS4: 16xVC-4, or 48xVC-3, or 1008xVC-12
- N3EGS4/N4EGS4: 16xVC-4, or 48xVC-3, or 504xVC-12 + 24xVC-3
|
| VCTRUNK specifications | Number of supported VCTRUNKs: 64 Configuration principles are as follows: - Each VC channel can be bound only to one VCTRUNK.
- 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.
- VC-4s numbered 1-4 and 9-12 of the N3EGS4/N4EGS4 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.
- VC-4s numbered 1-8 and VC-4s numbered 9-16 of the N3EGS4/N4EGS4
belong to two areas. VC-4 and VC-3 binding must not span the two
areas.
- VC-4s numbered 1-4 and VC-4s numbered 9-12 of the N3EGS4/N4EGS4
belong to two areas. VC-12 binding must not span the two areas.
- In the case of N1EGS4/N3EGS4 boards, a VCTRUNK can be bound with a
maximum of eight VC-4s, 24 VC-3s, or 64 VC-12s.
- In the case of N4EGS4 boards, a VCTRUNK can be bound with a maximum
of eight VC-4s, 24 VC-3s, or 63 VC-12s.
|
| Protection schemes | TPS | Not supported |
| BPS | Supported |
| PPS | SupportedNOTE:An EGS4 board providing GE electrical ports cannot be configured
with PPS. |
| DLAG | Supported |
| LAG | Supports manual link aggregation and static link aggregation. Supports the load sharing mode and load non-sharing mode. Complies 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 | Supports P2P LPT and P2MP LPT in compliance with proprietary
protocol.NOTE:For N4EGS4, both strict switching mode and non-strict switching
mode are supported in P2MP LPT. |
| STP/RSTP | Supports the RSTP, which complies with IEEE 802.1w. |
| MSTP | The N1EGS4 supports the MSTP. |
| Synchronization | Synchronous Ethernet | Not supported |
| IEEE 1588v2 | Not supported |
| Maintenance features | ETH OAM | - N1EGS4/N3EGS4 boards support CC and LB tests in compliance with
IEEE 802.1ag.
- N4EGS4 boards support CC, LB tests, and LT tests in compliance with
IEEE 802.1ag, and OAM ping in compliance with proprietary protocol.
- Supports 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
(N1EGS4/N3EGS4 boards can only initiate remote loopbacks).
|
| Test Frame | Supports test frames in GFP bearer mode. |
| Response to ping | Not supported |
| Port Mirroring | N4EGS4 boards support ingress mirroring. |
| Loopback capability | PHY layer at Ethernet ports | Supports inloops. |
| MAC layer at Ethernet ports | Not supported |
| VC-4 level | Not supported |
| VC-3 level | Not supported |
| VC-12 level | Not supported |
| RMON | Supports RMON of the Ethernet performance of Ethernet ports and
VCTRUNKs. |
| Warm resets | Supported (Warm resets do not affect services.) |
| 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. N1EGS4 boards
support 512 rate modes, and N3EGS4 and N4EGS4 boards support 60
rate modes.
- Supports the flow classification based on PORT, PORT+VLAN, or
PORT+SVLAN.
|
| IGMP Snooping | Protocol enabling | Supported |
| Port aging time | Supported |
| Fast leave | Supported by N4EGS4 boards |
| Discarding of unknown broadcast packets | Supported by N4EGS4 boards |
| Static broadcast entry | Not supported |
| Hub/Spoke | Supported |
| 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 | N4EGS4 boards support port-based and VCTRUNK-based traffic
monitoring. |
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