business need

• User A has two branches located in NE1 and NE3 to communicate over Ethernet and requires 10Mbit/s bandwidth.

• User B has two branches located in NE1 and NE3 and requires 20Mbit/s bandwidth for Ethernet communication.

• User A and User B's services need to be isolated from each other.

• The Ethernet devices of User A and User B provide 100Mbit/s Ethernet interfaces, the working mode is self-negotiation, and neither supports VLAN.

Figure 1 Configuration network diagram for EPL service

Optix Metro1000 single board configuration information
Service signal flow and time slot allocation
Figure 1 EPL service signal flow and time slot allocation (Ethernet passthrough single board)

• User A's EPL service:

• Occupies time slots 1 to 5 of VC-12 (VC4-1:VC12:1-5) of VC-4 on VC-4 No. 1 on the SDH link between NE1 and NE3, and the service is passed through at NE2.

• Use VC-12 time slots 1 to 5 (VC4-2:VC12:1-5) of VC-4 No. 2 of the EFT board in NE1 and VC-12 time slots 1 to 5 (VC4-2:VC12:1-5) of VC-4 No. 2 of the EFT board in NE3 for the up and down services.

• EPL service of user B:

• Occupies VC-12 time slots 6 to 15 (VC4-1:VC12:6-15) of VC-4 No. 1 on the SDH link between NE1 and NE3, and the service is passed through at NE2.

• Use VC-12 time slots 6 to 15 (VC4-2:VC12:6-15) of VC-4 No. 2 of the EFT board in NE1 and VC-12 time slots 6 to 15 (VC4-2:VC12:6-15) of VC-4 No. 2 of the EFT board in NE3 to carry the service up and down.

Table 1 External port parameters of the Ethernet single board

Parameter	NE1		NE3
Single board	EFT		EFT
EFT	PORT1	PORT2	PORT1	PORT2
Port Enable	Enable	Enable	Enable	Enable
Operating Mode	Self-negotiation	Self-negotiation	Self-negotiation	Self-negotiation
Maximum frame length	1522	1522	1522	1522

Table 2 Internal port parameters of the Ethernet single board

Parameter	NE1		NE3
Single board	EFT		EFT
Internal Port	VCTRUNK1	VCTRUNK2	VCTRUNK1	VCTRUNK2
Mapping Protocol	GFP	GFP	GFP	GFP
Binding Channel	VC4-2:VC12-1 to VC12-5	VC4-2:VC12-6 to VC12-15	VC4-2:VC12-1 to VC12-5	VC4-2:VC12-6 to VC12-15

Configuration Procedure
Prerequisites
Background Information

• For the support of EPL services by Ethernet passthrough veneers, refer to Service Support Capability of Ethernet Veneers.

• For the VCTRUNK binding requirements of the Ethernet passthrough single board, refer to the VCTRUNK channel binding requirements of the Ethernet single board.

Steps to configure the EPL service of the Optix Metro1000 Ethernet passthrough single board

1. Configure the EPL services of User A1 and B1 in NE1.

1. Configure the attributes of the external ports (PORT1 and PORT2 of the EFT board) occupied by User A1 and B1 respectively.

• Select the EFT board in the Element Manager, and then select "Configuration > Ethernet Interface Management > Ethernet Interface" in the Function Tree.

• Select "External Port".

• Select the Basic Properties tab. After completing the following parameter settings, click Apply.

Parameter	Value in this example	Description
Port Enable	PORT1: Enable PORT2: enable	The services of User A1 and B1 occupy the external ports of PORT1 and PORT2 respectively, so set the port enable of PORT1 and PORT2 to "Enable" here.
Port Operation Mode	PORT1: self-negotiation PORT2: Self-negotiation	The Ethernet service access devices of User A1 and B1 support self-negotiation, so set the working mode of PORT1 and PORT2 ports to "Self-negotiation".
Maximum Frame Length	PORT1: 1522 PORT2: 1522	This parameter usually takes the default value "1522".
MAC Loopback	PORT1: No loopback PORT2: No loopback	The loopback setting is used for troubleshooting. When configuring the service, you need to set it to "no loopback".
PHY Loopback	PORT1: No loopback PORT2: No loopback	The loopback setting is used for troubleshooting. When configuring the service, you need to set it to "No Loopback".

1. Configure the attributes of the internal ports (VCTRUNK1 and VCTRUNK2 of the EFT board) occupied by User A1 and B1 respectively.

• Select "Internal Port".

• The parameters under the "TAG Properties" tab use the default values.

• Select the "Binding Channel" tab, click the "Configuration" button, complete the following parameter settings in the pop-up "Binding Channel Configuration", and then click "Apply". Apply".

User	Parameter		Value in this example	Description
User A1←→User A2	Configurable port		VCTRUNK1	As shown in Figure 1, the User A1←→User A2 service occupies VCTRUNK1.
	Optional Binding Channel	Level	VC12-xv	User A1←→User A2 occupies 10 Mbit/s bandwidth and binds 5 VC12s. According to the bandwidth occupied by the service, for the method of calculating the binding time slot, see Ethernet Service Bandwidth that can be Carried by VCTRUNK of an Ethernet Veneer Board.
		Direction	Bidirectional	The service of User A1←→User A2 is a bidirectional service.
		Optional resources	VC4-2	The selection of different Ethernet single board resources can be referred to the VCTRUNK channel binding requirements of the Ethernet single board.
		Optional time slots	VC12-1 to VC12-5	User A1←→User A2 service binds 5 VC12s, the order is selected 1-5.
User B1←→User B2	Configurable port		VCTRUNK2	As shown in Figure 1, the User B1←→User B2 service occupies VCTRUNK2.
	Optional Binding Channel	Level	VC12-xv	The User B1←→User B2 service occupies 20 Mbit/s bandwidth and binds 10 VC12s. For the method of calculating the binding time slot according to the bandwidth occupied by the service, see Bandwidth of Ethernet services that can be carried by the VCTRUNK of the Ethernet veneer.
		Direction	Bidirectional	The service of User B1←→User B2 is a bidirectional service.
		Optional resources	VC4-2	The selection of different Ethernet single board resources can be referred to the VCTRUNK channel binding requirements of the Ethernet single board.
		Optional time slots	VC12-6 to VC12-15	User B1←→User B2 service binds 10 VC12s, and the order is selected from 6 to 15.

1. Configure the cross-connections of Ethernet services of User A1 and B1 to SDH links respectively.

• Select NE1 in the Network Element Manager and choose "Configuration > Optix Metro1000 SDH Service Configuration" in the Function Tree.

• Click "New" at the bottom of the right window, and set the following parameters in the pop-up "New SDH Service" dialog box.

User	Parameter	Value in this example	Description
User A1	Level	VC12	User A1 is bound to a time slot with a rank of VC12, where the service rank must be the same as the rank of the channel bound to VCTRUNK.
	Direction	Bidirectional	The service of User A1 is a bidirectional service.
	Source board position	2-EFT	When creating a bi-directional SDH service from an Ethernet veneer to a line veneer, it is recommended that the Ethernet veneer be used as the source board position.
	Source time slot range (e.g., 1, 3-6)	1-5	The value of source time slot range is the same as the value of "optional time slot" in the configuration of VCTRUNK1 binding channel, and the value of "optional time slot" of VCTRUNK1 is from VC12-1 to VC12-5.
	Host board position: 3-OI2D-1 (SD2D-1)	3-OI2D-1(SDH-1)	When creating a bidirectional SDH service from an Ethernet veneer to a line veneer, it is recommended that the line veneer be used as the host board position.
	Host VC4	VC4-1	Specifies the VC4 time slot for the line veneer to carry Ethernet services as VC4-1.
	Range of host time slots (e.g., 1, 3-6)	1-5	The host timeslot range can be the same or different from the source timeslot range, but the number of timeslots must be the same, for example, if the source timeslot occupies 5 VC12s, the host timeslot must also occupy 5 VC12s.
	Immediate activation	Yes	-User B1
User B1	Level	VC12	User B1 is bound to a timeslot level of VC12, where the service level must be the same as the level of the channel bound to VCTRUNK.
	Direction	Bidirectional	The service of User B1 is a bidirectional service.
	Source board position	2-EFT	When creating a bi-directional SDH service from an Ethernet veneer to a line veneer, it is recommended that the Ethernet veneer be used as the source board position.
	Source time slot range (e.g., 1, 3-6)	6-15	The value of source time slot range is the same as the value of "optional time slot" in the configuration of VCTRUNK2 binding channel, and the value of "optional time slot" of VCTRUNK2 is from VC12-6 to VC12-15.
	Host board position	3-OI2D-1(SDH-1)	When creating a bidirectional SDH service from an Ethernet veneer to a line veneer, it is recommended that the line veneer be used as the host board position.
	Host VC4	VC4-1	Specifies the VC4 time slot for the line veneer to carry Ethernet services as VC4-1.
	Host time slot range (e.g., 1, 3-6)	6-15	The host time slot range can be different from the source time slot range, but the number of channels must be the same, for example, if the source time slot occupies 10 VC12s, the host time slot must also occupy 10 VC12s.
	Immediate activation	Yes	-Yes

1. Configure the pass-through service of User A1 and B1 in NE2.

1. Click and in the pop-up Network Element Navigation Tree, select NE2 and click OK.

1. Select NE2 in the Network Element Manager and choose Configuration > SDH Service Configuration in the Function Tree.

1. Click "New" at the bottom of the right window, and set the following parameters in the pop-up "New SDH Service" dialog box.

Parameter	Value in this example	Description
Grade	VC12	The SDH service level of NE1 flowing through NE2 is VC12.
Direction	Bidirectional	As shown in Figure 1, the SDH service flowing from NE1 through NE2 is a bidirectional service.
Source board position	1-OI2D-1(SDH-1)	As shown in Figure 1, the service signal goes from 1-OI2D-1(SDH-1) to 3-OI2D-1(SDH-1), and 1-OI2D-1(SDH-1) is selected for the source board position here.
Source VC4	VC4-1	NE1 flows through NE2 service allocation to occupy VC4-1.
Source time slot range (e.g., 1, 3-6)	1-15	User A1 and B1 services occupy a total of time slots 1-15.
Host board position	3-OI2D-1 (SDH-1)	As shown in Figure 1, the service signals from 1-OI2D-1(SDH-1) to 3-OI2D-1(SDH-1), and 3-OI2D-1(SDH-1) is selected for the host board position here.
Host VC4	VC4-1	The value of the host VC4 is recommended to be the same as the source VC4.
Host time slot range (e.g., 1, 3-6)	1-15	User A1 and B1 users' services occupy a total of time slots 1-15.
Immediate activation	Yes	-Activate Now

1. Configure EPL services for User A2 and B2 in NE3.

1. Verify the correctness of the service configuration of User A1←→User A2 and User B1←→User B2, respectively, and the operation procedure can be referred to Testing Ethernet Service Channels.

1. Enable the performance monitoring of the network element. For the procedure, refer to Setting the Performance Monitoring Parameters of the Network Element.

1. Backup the configuration data of the network element, the operation procedure can be referred to Backup the network element database to the main control board.

The data services of two users at one site need to be transmitted to another site in complete isolation.

Ethernet pass-through single board or Ethernet switching single board can realize EPL service.In this example, network elements NE1 and NE3 are configured with one EFT pass-through single board respectively.