Ethernet service configurations

Overview

Alcatel-Lucent 1665 DMX supports the Ethernet services shown in the following table.

Table A-13: Supported Ethernet services

Service	VCGs (per Circuit Pack)	Ethernet Ports	SONET Capacity	Tagging Mode	Ethernet Forwarding (Switching) based on
Private Line	1 Private Line per VCGProtected	Dedicated	Dedicated	Private Line (No tag)	No Ethernet switching. Point-to-Point connection is preconfigured.
	1 Private Line per VCGUnprotected	Dedicated	Dedicated	Transparent	No Ethernet switching. Point-to-Point
	1 Private Line per VCGUnprotected	Dedicated	Dedicated	802.1Q	No Ethernet switching. Point-to-Point
Private LAN	1 Subscriber per VCG	Dedicated	Dedicated	Transparent	Stacked VLAN Tag
Private LAN	1 Subscriber per VCG	Dedicated	Dedicated	802.1Q	Original or Port Default VLAN Tag
Virtual Private LAN	Several Subscribers per VCG	Dedicated or Shared	Shared	Transparent	Stacked VLAN Tag
Virtual Private LAN	Several Subscribers per VCG	Dedicated or Shared	Shared	802.1Q	Original or Port Default VLAN Tag
Ethernet Virtual Private LAN	1 Subscriber per LAN port	Dedicated	Shared	Transparent	Stacked VLAN Tag
Ethernet Virtual Private LAN	1 Subscriber per LAN port	Dedicated	Shared	802.1Q	Original or Port Default VLAN Tag

The following table shows the typical Ethernet service configurations.

Table A-14: Typical Ethernet service configurations

Service	Cross-connect type	Protection		Ring type	Tagging mode
Service	Cross-connect type	SONET	Spanning tree	Ring type	Tagging mode
Private Line	1wayPR, 1way	Yes	Not allowed	UPSR	Private Line
	1way unswitched	No		UPSR
	1way	Yes		BLSR
	1way unswitched	No		BLSR w/NUT
Private LAN	1way unswitched	No	Yes	UPSR	Transparent or 802.1Q
Private LAN	1way unswitched	No	Yes	BLSR w/NUT	Transparent or 802.1Q
Virtual Private LAN	1way unswitched	No	Yes	UPSR	802.1Q
Virtual Private LAN	1way unswitched	No	Yes	BLSR w/NUT	802.1Q
Virtual Private Line service	1wayPR, 1way	Yes	No	UPSR	Transparent or 802.1Q
	1way unswitched	No	Yes	UPSR
	1way	Yes	No	BLSR
	1way unswitched	No	Yes	BLSR w/NUT

Private line service

Private line service is a point-to-point service with two dedicated LAN ports and dedicated SONET capacity. Because it is a point-to-point service, spanning tree protection is not used. Protection is provided at the SONET layer only.

Ethernet Private Line service can be provided over SONET UPSRs. The following figure shows an example of Private Line service with protection provided by a SONET UPSR.

Figure A-36: Ethernet Private Line service over protected UPSR

The following figure shows two independent unprotected links. External or subscriber equipment can use these links to either provide two paths between equipment or separate paths for link aggregation.

Figure A-37: Dual unprotected Ethernet Private Line over UPSR or BLSR

Private LAN, Virtual Private LAN, and Virtual Private Line services

In Private LAN service, LAN ports and SONET capacity are dedicated to one subscriber. In Virtual Private LAN service, several subscribers share SONET capacity and can share LAN ports. Traffic is segregated by its VLAN/port TAG. Virtual Private Line service is subset of Virtual Private LAN service, where the subscriber is given a point-to-point service with dedicated LAN ports.

Protection can be provided either by packet layer spanning tree protocols, by the SONET layer, or by both. The network could also use tributaries provisioned for nonpreemptible unprotected traffic (NUT). If NUT is provisioned, the Ethernet traffic is protected by the spanning tree protocol.

The following figure shows multipoint cross-connections used to form a packet ring.

Figure A-38: Spanning tree protected private LAN and virtual private LAN services

A spanning tree is required to eliminate Ethernet forwarding loops. The Ethernet traffic is protected by the spanning tree. In UPSRs, an additional packet ring could be supported on VCG 3 and VCG 4 protected by its spanning tree.

Virtual Private Line LNW170

The figure below depicts the traffic flow of multiple virtual private lines in transparent mode over shared media (optical fiber). For more information on private lines in transparent mode, see the information under Transparent mode. For information on Boundary and Interior port demarcation, see Boundary versus interior ports.

Figure A-39: Virtual Private Line with LNW170

LAN service with LNW170

The figure depicts the traffic flow of multiple VLANs over shared media (optical fiber). For more information on VLANs, see Private LAN, Virtual Private LAN, and Virtual Private Line services. For information on Boundary and Interior port demarcation, see Boundary versus interior ports.