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 100 Mbit/s Ethernet interfaces with self-negotiation operating mode, and neither supports VLANs.

Figure 1 Configuration network diagram for EPL services

EPL service veneer configuration information for optix metro1000 Ethernet switching veneer
Description:
As shown in Table 1, the Ethernet veneer is divided into a pass-through veneer and a switching veneer from the point of view of service types. The pass-through veneer supports only EPL services, while the switching veneer supports EVPL services and Layer 2 switching functions in addition to EPL services, which makes the application scenarios richer.
Service signal flow and time slot allocation
Figure 1 EPL service signal flow and time slot allocation (Ethernet switching single board)

• EPL service of user A:

• 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-1 No. 2 of the EFS board in NE1 and VC-12 time slots 1 to 5 (VC4-2:VC12:1-5) of VC-4 No. 2 of the EFS board in NE3 to carry 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 EFS board in NE1 and VC-12 time slots 6 to 15 (VC4-2:VC12:6-15) of VC-4 No. 2 of the EFS 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	EFS		EFS
EFS	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
Entry detection	Prohibited	Prohibited.	Prohibit! - Prohibit!	Prohibit
Port Attributes	PE	PE	PE	PE

Table 2 Internal port parameters for Ethernet single boards

Parameter	NE1		NE3
Single board	EFS		EFS
Internal Ports	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
Entry detection	Prohibit	Prohibit	Prohibit	Prohibit
Port Attributes	PE	PE	PE	PE

Table 3 EPL service parameters

Parameter	EPL service of user A	User B's EPL service
Single board	EFS
Service Type	EPL
Service Direction	Bidirectional
Source Port	PORT1	PORT2
Source VLAN (e.g. 1,3-6)	Empty	Empty
Host Port	VCRTUNK1	VCTRUNK2
Host VLAN (e.g. 1,3-6)	Empty	Empty

Configuration procedure
Prerequisites
Background information

• For the support of EPL services on the Ethernet switching veneer, refer to Service Support Capability of Ethernet Veneer.

• For the VCTRUNK binding requirements of the Ethernet switching veneer, refer to the VCTRUNK channel binding requirements of the Ethernet veneer.

Steps to operate the EPL service of the optix metro1000 Ethernet switching single board

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

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

• Select the EFS 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".

• "The parameters under the Flow Control tab use the default values.

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

Parameter	Value in this example	Description
TAG identifier	PORT1: Access PORT2: Access	The access devices of User A1 and B1 do not support VLAN and send out data frames without VLAN tags, so it is recommended that the TAG identifiers of PORT1 and PORT2 be set to "Access".
Default VLAN ID	PORT1: 1 PORT2: 1	The services of User A1 and B1 occupy the PORT port and VCTRUNK port by themselves and do not need to be segregated by VLAN ID. Use the default VLAN ID here.
VLAN Priority	PORT1: 0 PORT2: 0	User A1 and B1 do not need to set the default VLAN ID, and the VLAN priority is meaningless, so just take the default value here.
Ingress Detection	PORT1: Disable PORT2: Disable	The services of User A1 and B1 are EPL passthrough services, so they do not need to enable the ingress detection function to detect the VLAN tag of the message, and the ingress detection here needs to be set to "Disable". When "Ingress Detection" is set to "Disable", "TAG ID", "Default VLAN ID", "VLAN Priority", "VLAN Tag", and "VLAN Priority" will be set to "Disable". and "VLAN Priority" parameters are meaningless.

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

Parameter	Value in this example	Description
Port Attributes	PORT1: PE PORT2: PE	PE refers to the edge port of the service provider, and the port with PE attribute can send and receive standard Ethernet frames.

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

1. Configure the properties of the internal ports occupied by User A1 and B1 (VCTRUNK1 and VCTRUNK2 of the EFS single board) respectively.

• Select "Internal Port".

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

Parameter	Value in this example	Description
Entry detection	VCTRUNK1：Disable VCTRUNK2: Disable	The services of User A1 and B1 are EPL pass-through services, so they do not need to enable the ingress detection function to detect the VLAN tag of the message, and the ingress detection here needs to be set to "Disable". When "Ingress Detection" is set to "Disable", "TAG ID", "Default VLAN ID", "VLAN Priority", "VLAN Tag" and "VLAN Priority" are disabled. and "VLAN Priority" parameters are meaningless and can be taken as default values.

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

Parameter	Value in this example	Description
Port Attributes	VCTRUNK1: PE VCTRUNK2: PE	PE refers to the edge port of the service provider, and the port with PE attribute can send and receive standard Ethernet frames.

• Select the Encapsulation/Mapping tab. After completing the following parameter settings, click Apply.

Parameter	Value in this example	Description
Mapping protocol	VCTRUNK1: GFP VCTRUNK2: GFP	For the EFS board used in this example, the default value of this parameter is "GFP". The "Mapping Protocol" of the VCTRUNK of the Ethernet boards on both sides of the interface must be set to the same value.
Scrambling Code	VCTRUNK1: Scrambling mode [X43+1]. VCTRUNK2: Scrambling mode [X43+1].	This parameter takes the default value "Scrambling mode [X43+1]". The "scrambling mode" of the VCTRUNK of the Ethernet boards at both ends of the interface should be the same.
Check field length	VCTRUNK1: FCS32 VCTRUNK2: FCS32	This parameter takes the default value of "FCS32". The "checksum field length" of the VCTRUNK of the Ethernet boards on both sides of the interface should be the same.
FCS Calculation Bit Order	VCTRUNK1: Big endian VCTRUNK2: Big endian	When "GFP" is selected as the "Mapping Protocol", this parameter is set to "Big endian". The "FCS Calculation Bit Sequence" setting of the VCTRUNK of the Ethernet boards at both ends of the interface must be the same.
Extended Header Options	VCTRUNK1: No VCTRUNK2: No	This parameter is valid when "Mapping Protocol" is set to "GFP", and the default value is "No". The "Extended Header Option" setting of VCTRUNK of the Ethernet boards on both sides of the interface should be the same.

• Select the "Binding Channel" tab. Click the Configure button and complete the following parameter settings in the Binding Channel Configuration popup, then click 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	The User A1←→User A2 service 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 slots, see Ethernet service bandwidth that can be carried by the VCTRUNK of the Ethernet veneer.
		Direction	Bidirectional	The service of User A1←→User A2 is a bidirectional service.
		Optional resources	VC4-2	The second VC4 of the EFS board can be bound to VC12, and VC4-2 is selected here. If other boards are used, the selection of resources should refer to the VCTRUNK channel binding requirements of the Ethernet board.
		Optional time slots	VC12-1 to VC12-5	User A1←→User A2 service binds 5 VC12s, and the order is selected from 1 to 5.
User B1←→User B2	Configurable port		VCTRUNK2	As shown in Figure 1, the service User B1←→User B2 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 second VC4 of the EFS board can be bound to VC12, and VC4-2 is selected here. If other single boards are used, refer to the VCTRUNK channel binding requirements of the Ethernet single board for resource selection.
		Optional time slots	VC12-6 to VC12-15	User B1←→User B2 service binds 10 VC12s, and the order is 6-15.

1. Configure the Ethernet leased line service of User A1 and B1 respectively.

• Select the EFS board in the Element Manager, and then select "Configuration > Ethernet Service > Ethernet Private Line Service" in the Function Tree.

• Click the "New" button at the bottom of the right window, and then set the following parameters in the pop-up "New Ethernet Service" window, click "OK", and then the "Operation Result" dialog box will pop up. Click "OK", and then click "Close" after the "Operation Result" dialog box pops up and indicates that the operation is successful.

User	Parameter	Value in this example	Description
User A1	Business type	EPL	The business type of User A1 is EPL business.
	Service Direction	Bidirectional	The business direction of User A1 is bi-directional.
	Source port	PORT1	When creating a bidirectional Ethernet service from PORT to VCTRUNK, it is recommended that PORT be the source port.User A1 occupies port PORT1.
	Source VLAN (e.g. 1,3-6)	Empty.	The EPL service in this example does not carry a VLAN tag.
	Host Port	VCTRUNK1	When creating a bidirectional Ethernet service from PORT to VCTRUNK, it is recommended that VCTRUNK be used as the host port.User A1 occupies port VCTRUNK1.
	Host VLAN (e.g. 1,3-6)	Empty	The EPL service in this example does not carry a VLAN tag.
User B1	Service Type	EPL	The service type of User B1 is EPL service.
	Business Direction	Bidirectional	The business direction of User B1 is bi-directional.
	Source port	PORT2	When creating a bidirectional Ethernet service from PORT to VCTRUNK, it is recommended that PORT be the source port.User B1 occupies port PORT2.
	Source VLAN (e.g. 1,3-6)	Empty.	The EPL service in this example does not carry a VLAN tag.
	Host Port	VCTRUNK2	When creating a bidirectional Ethernet service from PORT to VCTRUNK, it is recommended that VCTRUNK be used as the host port.User B1 occupies port VCTRUNK2.
	Host VLAN (e.g. 1,3-6)	Empty	The EPL service in this example does not carry a VLAN tag.

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

• Select NE1 in the Network Element Manager and choose "Configuration > 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 "bi-directional" service.
	Source board position	2-EFS-1(SDH-1)	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 VC4	VC4-2	The value of source VC4 is the same as the value of "optional resource" in the configuration of VCTRUNK1 binding channel, and the value of "optional resource" of VCTRUNK1 is VC4-2.
	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 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 time slot range can be the same or different from the source time slot range, but the number of time slots must be the same, for example, if the source time slot occupies 5 VC12s, the host time slot 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-EFS-1(SDH-1)	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 VC4	VC4-2	The value of source VC4 is the same as the value of "optional resource" in the configuration of VCTRUNK2 bonding channel, and the value of "optional resource" of VCTRUNK2 is VC4-2.
	Source time slot range (e.g. 1,3-6)	6-15	The source time slot range is the same as the value of "optional time slot" in the VCTRUNK2 binding channel configuration, and the value of "optional time slot" for VCTRUNK2 is 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 timeslot range can be different from the source timeslot range, but the number of channels must be the same. For example, if the source timeslot occupies 10 VC12s, the host timeslot 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 to 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 as 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.