POL Solution

POL Solution Overview

A traditional enterprise LAN involves multi-layer Ethernet switch aggregation, which complicates the network architecture. As a result, network operation and maintenance (O&M) costs are high, and bandwidth and service expansion is hard. PON technologies, however, have been successfully applied to residential networks. The fast worldwide FTTH rollout has stimulated the maturation of PON technologies and reduced the cost. A PON network has a flattened architecture. Such a network is easy to manage and maintain, and has low latency and high bandwidth. These features are consistent with the new requirements on enterprise networks, and POL caters to the promotion and application of PON technologies in enterprise.

POL Solution Architecture

POL offers a Layer 2 transmission network and employs the PON technology to provide Gigabit access for users. It carries multiple services (such as video, data, wireless, and voice) over one fiber.

POL Solution Architecture

POL is highly scalable, delivering gigabit speeds and potentially unlimited bandwidth. The same cables and access nodes can be reused as new services are introduced and bandwidth is increased.
POL can reduce TCO by 47 percent in a single year by providing a single simplified, centrally managed network to support all services.
POL reduces energy costs because passive equipment does not require power or cooling, and POL reduces cabling costs by replacing bulky copper bundles with fiber.
POL frees up space on customer premises by eliminating the need for telecom equipment closets on every floor. The passive nature of the network requires fewer racks, switches and patch panels than copper-based Ethernet.
POL is easy and cost effective to upgrade: Simply insert a new line card in the optical line terminal (OLT), patch the fiber to the port where service is needed and change the optical network terminal (ONT) at the user location.

	Subsystem Name	Traditional Solution Product	POL Solution Product
1	Equipment room subsystem	Optical distribution frame (ODF) Voice distribution frame	ODF Centralized optical splitters
2	Backbone/vertical routing subsystem	A large number of copper lines Indoor multi-mode optical cable	Indoor single-mode optical cable
3	Storey management/storey equipment room subsystem	Subrack/cabinet Copper line distribution frame ODF	Storey cable distribution boxFiber connector Decentralized optical splitters
4	Horizontal routing subsystem	Twisted pair Indoor multi-mode optical cable	Flat drop cable
5	Workspace subsystem	Copper line module Copper line panel Copper line jumper	Fiber connector Fiber jumper

POL Device Selection

In a traditional Ethernet network, the central computer room needs more equipment, space, power/uninterruptible power supply (UPS), and more heating, ventilation and air conditioning (HVAC) controls. Cat 5 and Cat 6 cables run from intermediate distribution frames (IDFs) or risers to the rest of a networked floor. These IDFs need to be finished properly and provided with HVAC and power. The POL infrastructure is much lighter. Fiber runs from the OLT in the central room throughout the building. Passive splitters can be located anywhere. ONTs are placed at suitable locations to provide Ethernet ports where required.

POL Device Selection

Less cables = reduction in cable costs, load and zero maintenance of ODN network
Less equipments = less floor space, no room for ODN & ONU equipments
Passive network = less power consumption, less HVAC
Simpler network = easier maintenance
Cost-efficient upgrade = same fiber, same OLT

Device Function Comparison

Category	Subcategory	Access and Convergence Switches	POL ONU and OLT
Switching	Layer 2 switching	Supports switching based on MAC address learning.	Supports switching based on MAC address learning.
	Switching structure	Exchanges traffic between the access switch and the convergence switch.	Exchanges traffic between the ONU or the OLT.
	Layer 3 switching	Supports Layer 3 switching based on route tables.	The OLT supports Layer 3 switching based on route tables (Layer 2 mode is recommended).
	Multicast forwarding	Supports the Internet Group Management Protocol (IGMP) and multicast stream duplication and forwarding.	Supports the IGMP and multicast stream duplication and forwarding.
Protection	Tree network protection	Supports one access switch which is dual-homed to two convergence switches.	Supports one ONU which is dual-homed to two OLTs (the 2:N optical splitter is required).
	Ring network protection	Supports the Multiple Spanning Tree Protocol (MSTP) and Rapid Ring Protection Protocol (RRPP).	The OLT supports the MSTP and RRPP.
	Upstream protection	Supports the Link Aggregation Control Protocol (LACP) and Smartlink (Huawei proprietary protocol).	The OLT supports the LACP and Smartlink (Huawei proprietary protocol).
Security	Access security	Supports the IEEE 802.1x and portal authentications.	Supports basic IEEE 802.1x authentication (IEEE 802.1x and portal authentications are recommended for the core switch).
	Network security	Supports DHCP snooping, ARP snooping, IP anti-spoofing, and MAC anti-spoofing.	Supports IP anti-spoofing and MAC anti- spoofing.
	Management security	Supports Remote Authentication Dial In User Service (RADIUS) and HWTACACS (Huawei proprietary protocol).	Supports RADIUS and HWTACACS (Huawei proprietary protocol).
QoS	ACL	Supports the access control list (ACL).	The OLT supports the ACL.
QoS	Scheduling and congestion prevention	Supports strict-priority (SP), weighted round robin (WRR), and SP+WRR. Supports tail drop and early drop.	Supports SP, WRR, and SP+WRR. Supports tail drop and early drop.
Management and maintenance	——	The access switch requires onsite deployment and configuration.	The ONU supports plug-and-play and therefore, onsite deployment and configuration are not required.
Management and maintenance	——	Supports Link Layer Discovery Protocol (LLDP) topology discovery and automatic configuration of LLDP-Media Endpoint Discovery (MED).	The OLT supports LLDP topology discovery and the ONU supports automatic configuration of LLDP-MED.

POL System Construction

Device Construction

Device Selection

OLT: Based on service scales, select a large-, medium-, or small-size OLT, which separately supports a maximum of 256, 96, or 32 PON ports.
ONU: Based on carried services, select an ONU with 1, 4, 8, 16, or 24 Ethernet ports.
Splitter: Based on service bandwidth, select an optical splitter that supports a split ratio ranging from 1:2 to 1:64.

Device Deployment

OLT (similar to switches):

Hardware commissioning: After the OLT is powered on, check whether the subrack, board, and components (such as the indicator and fan) function normally.
Software commissioning: Configure the OLT based on the data planning (such as the VLAN planning and IP address planning).

ONU: The ONU supports plug-and-play and configuration is automatically issued when it is powered on. Therefore, no onsite commissioning is required.

Splitter: The optical splitter is a passive device and requires no configuration.

Line Construction

High-rise Building Scenario

Typical Case	Basic Description	Routing Principle	Application Scenario
	Number of information points at each storey: 50–60	Optical splitters are placed in the storey management subsystem area.	State-owned office buildings or government buildings
	Number of information points at each storey: over 100	Optical splitters are placed in the storey management subsystem area. Each storey has multiple such areas.	High-end hotels
	Number of information points at each storey: over 100 (their positions in the working area are to be determined.)	Optical splitters are placed in the storey management subsystem area.	High-end office buildings

POL Devices Overview

OLT

EA5800-X2

19 inch wide, 2U high
2 Control board slots, 2 Service boards. DC (dual power for backup), AC power + Battery（option
Control board switching capacity: 480G bps
NNI: 10G/GE
UNI: 32*GPON or 16*10G GPON or 96*GE/FE or 16*10GE

EA5800-X7