Version Description The functional version of EG4/EG4P boards is SL91. Application EG4/EG4P boards receive and transmit GE services or carry Multiprotocol Label Switching (MPLS) tunnels. Because one EG4P board provides two power-over-Ethernet ports, EG4P boards can also build networks in conjunction with OptiX RTN 310/380. Receiving and Transmitting Ethernet Services EG4/EG4P boards apply to OptiX RTN 910 NEs to receive and transmit Ethernet services over Integrated IP radio. The GE services come from user-side equipment (such as base stations, routers, and switches) or Layer 2 networks. Figure 1 Application scenario of EG4/EG4P boards (1) NOTE: The IF boards shown in the preceding figure must be general-purpose IF boards or XPIC IF boards working in native E1+Ethernet mode or native STM-1+Ethernet mode. In the preceding figure, if transmitted over Integrated IP radio, Ethernet services can be native Ethernet services or ETH pseudo wire emulation edge-to-edge (PWE3) services. Carrying MPLS Tunnels EG4/EG4P boards can carry MPLS tunnels when required, allowing MPLS/PWE3 services traversing radio networks and regional backhaul networks to be transmitted in end-to-end mode. Figure 2 Application scenario of EG4/EG4P boards (2) NOTE: The IF boards shown in the preceding figure must be general-purpose IF boards or XPIC IF boards working in native E1+Ethernet mode or native STM-1+Ethernet mode. If required, two MPLS tunnels can be created on both the packet radio network and regional backhaul network, so PWE3 services can be transmitted on multi-segment pseudo wires (MS-PWs) in end-to-end mode. Service boards shown in the preceding figure can be either Smart E1 processing boards or Ethernet interface boards. Working with OptiX RTN 310s/380s EG4P boards provide electrical GE ports that can supply power over Ethernet to full-outdoor OptiX RTN 310s/380s. Cooperation between EG4P boards and OptiX RTN 310s/380s increases service convergence capabilities of OptiX RTN 910s. Figure 3 Application scenario of EG4/EG4P boards (3) NOTE: One EG4P board can supply power to a maximum of two OptiX RTN 310s/OptiX RTN 380s. One OptiX RTN 910 can supply power to a maximum of two OptiX RTN 310s/OptiX RTN 380s. An OptiX RTN 910 can be connected to a maximum of two ODUs+OptiX RTN 310s/OptiX RTN 380s. Functions and Features EG4/EG4P boards receive/transmit, process, and converge 4xGE service signals. They also can receive/transmit 2xFE optical signals using FE SFP optical modules installed at their SFP ports. Table 1 lists the functions and features supported by EG4/EG4P boards. EG4/EG4P boards implement Ethernet service functions by working with packet switching units on the system control, switching, and timing boards. Table 1 Functions and features that EG4/EG4P boards support Function and Feature Description Basic functions Receives/Transmits GE service signals, and processes these signals by working with the packet switching unit. Port specifications GE port Provides four GE ports. Provides two fixed GE electrical ports (through which EG4P boards support power-over-Ethernet). Provides two fixed GE electrical ports or two SFP optical ports. Supports the following types of SFP modules: Dual-fiber bidirectional FE/GE optical module Single-fiber bidirectional FE/GE module Backplane bus bandwidth 1 Gbit/s Switching mode Centralized mode NOTE: When a board works in centralized mode, all Ethernet services carried on the board must be forwarded by the packet switching unit of the cooperating system control board. Port attributes Working mode GE electrical ports support 10M/100M/1000M full-duplex and auto-negotiation. GE optical ports support 1000M full-duplex and auto-negotiation. FE optical ports support 100M full-duplex. Tag attributes The tag attribute can be tag aware, access, or hybrid. Sets and queries the tag attribute of a port. Jumbo frames Supports jumbo frames with a maximum length of 9600 bytes. Traffic control Supports port-based traffic control that complies with IEEE 802.3x. Services Native Ethernet services E-Line services Port-based E-line services VLAN-based E-line services E-Line services carried by QinQ links E-LAN services E-LAN services based on IEEE 802.1d bridges E-LAN services based on IEEE 802.1q bridges E-LAN services based on IEEE 802.1ad bridges PWE3 Ethernet services E-Line services carried by PWs E-Aggr services carried by PWs E-LAN services carried by PWs, that is, virtual private LAN services (VPLSs), supported only when the system control, switching, and timing board is an SLA2CSHD board Link aggregation group (LAG) Inter-board LAG Supported Intra-board LAG Supported Ethernet ring protection switching (ERPS) Supported (complies with ITU-T G.8032 v1/v2) MPLS functions Refer to the description of MPLS/PWE3 functions provided in the sections about system control, switching, and timing boards. PWE3 functions Spanning Tree Protocol (STP) Supports Multiple Spanning Tree Protocol (MSTP) that runs only Common and Internal Spanning Tree (CIST) instances. This type of MSTP provides the same functions as Rapid Spanning Tree Protocol (RSTP). IGMP snooping Supported Link-state pass through (LPT) Supported Port mirroring Supported LLDP Supported IEEE 1588v2 clock Time synchronization Supported Frequency synchronization Supported Precision Time Protocol (PTP) port The Ethernet ports of EG4/EG4P boards can work as PTP ports if the NEs housing the boards work in ordinary clock (OC), boundary clock (BC), or transparent clock (TC) mode. The Ethernet ports of EG4/EG4P boards can work as PTP BC ports or PTP TC ports if the NEs housing the boards work in TC+BC mode. Quality of service (QoS) DiffServ Supports simple traffic classification by specifying per-hop behaviors (PHBs) for traffic flows based on their QoS information, such as C-VLAN priorities, S-VLAN priorities, DSCP values, or MPLS EXP values. Complex traffic classification Supports traffic classification based on the following information carried by packets: C-VLAN IDs, S-VLAN IDs, C-VLAN priorities, S-VLAN priorities, C-VLAN IDs + C-VLAN priorities, S-VLAN IDs + S-VLAN priorities, or DSCP values. Committed access rate (CAR) Provides the CAR function for traffic flows at ports. Shaping Supports traffic shaping for a specific port, prioritized queue, or traffic flow. Queue scheduling policies Strict-priority (SP) Weighted round robin (WRR) SP+WRR Congestion avoidance Supports tail drop and weighted random early detection (WRED). Traffic shaping Supports shaping for a specified port, priority queue, or service flow, and supports a step of 64 kbit/s for the peak information rate (PIR) and committed information rate (CIR). ETH OAM functions Ethernet service OAM Supports ETH OAM functions that comply with IEEE 802.1ag. Supports frame loss measurement, frame delay measurement, and delay variation measurement functions that comply with ITU-T Y.1731. Ethernet port OAM Supports ETH OAM functions that comply with IEEE 802.3ah. Remote network monitoring (RMON) Supported Clock Clock source Synchronous Ethernet Clock protection Protection implemented by providing clock sources with different priorities Protection implemented by running the Synchronization Status Message (SSM) protocol Protection implemented by running the extended SSM protocol Data communication network (DCN) Inband DCN Each port provides one inband DCN channel. Power over Ethernet (available only on EG4P boards) Number of ports supporting power over Ethernet 2 Enabling/Disabling power over Ethernet Software controlled Power protection Supported Operation and management Loopback Supports inloops at the PHY layer of Ethernet ports. Supports inloops at the MAC layer of Ethernet ports. Warm and cold resetting Supported Manufacturer information query Supported Power consumption query Supported Voltage monitoring Supported Temperature monitoring Supported SFP module information query Supported
