China High Cross-Connection, System Control and Clock Processing Board

Product Description

EGS4 boards support the Layer 2 switching, link aggregation, and multicast functions.

Table 1 and Table 2 lists the functions and features supported by EGS4 boards.

Table 1 EoS functions and features supported by EGS4 boards

Function and Feature	Description
Basic functions	Receives/Transmits and processes 4xFE or 4xGE services. NOTE: If created as the EGS4 or EGS4D board on the NMS, the board supports EoS application.
Port types	FE SFP optical module type: 100BASE-BX/100BASE-FX/100BASE-LX/100BASE-VX/100BASE-ZX GE SFP optical module type: 1000BASE-SX/1000BASE-LX/1000BASE-ZX GE SFP electrical module type: 1000BASE-T, supporting auto-negotiation SFP module types: FE/GE two-fiber bidirectional pluggable optical module FE/GE single-fiber bidirectional pluggable optical module GE pluggable electrical module A GE optical port can be a colored CWDM optical port. A colored CWDM optical port supports a transmission distance of 40 km or 80 km.
Port characteristics	Working modes	GE electrical port: auto-negotiation, 1000M full-duplex, 100M full-duplex, and 10M full-duplex GE optical port: auto-negotiation and 1000M full-duplex FE optical port: 100M full-duplex
	Traffic control at ports	Auto-negotiation mode	Supported only by GE ports
	Traffic control at ports	Non-autonegotiation mode	Supported
	Query/Setting of port status	Supported
	Query of port types	Supported
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.
	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 16K. 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. Supports a maximum of 16 VBs. The maximum number of logical ports for each VB is 68. Supports the EPLAN services that are based on the IEEE 802.1d MAC bridge.
	EVPLAN service	Supports data isolation based on VB+VLAN. Supports the setting of a maximum of 4095 VLAN filtering tables. Supports the EVPLAN services that are based on the IEEE 802.1q virtual bridge and IEEE 802.1ad provider bridge.
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.
	Bound bandwidth	16 x VC-4, or 48 x VC-3, or 252 x VC-12
	Concatenation granularities	VC-12, VC-3, VC-4, VC-12-Xv (X ≤ 63), 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.
	VCTRUNK specifications	64 Configuration principles are as follows: Supports a maximum of 16 VC-4s. VC-4s numbered 1-4 of the board support the binding of VC-3 and VC-12 paths. The other VC-4s support the binding of VC-3 paths only.
Protection schemes	Distributed link aggregation group (DLAG)	Supports static DLAGs. Supports non-load sharing DLAGs. Complies with IEEE 802.3ad and IEEE 802.1AX.
	LAG	Supports manual link aggregation and static link aggregation. Supports the load sharing mode and non-load sharing mode. Complies with IEEE 802.3ad and IEEE 802.1AX.
	LCAS	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 ITU-T G.7042.
	STP/RSTP	Supports the RSTP, which complies with IEEE 802.1w.
	MSTP	Not supported