The aim of this guide is to show a solution for creating a wired data transmission network infrastructure based on GPON technology, using an enterprise network as an example. In this case, an example of deploying a hotel network will be used.

Introduction

GPON is an access technology that uses a passive optical network (PON) as the transport medium between optical network terminals (ONT) and optical line terminals (OLT). The common components of all PON networks are optical fiber and passive (non-powered) elements such as splitters, combiners, etc. Thus, the key advantage of PON networks is that there is no need to use active elements (amplifiers, signal repeaters) that require additional power in the OLT↔ONT section.

The main advantages of the technology are: the use of a single OLT for multiple subscriber devices, optimal use of bandwidth, as well as higher signal transmission range on the optical network, higher transmission speeds, and higher subscriber density compared to ETTH technologies. GPON technology enables data transfer speeds of up to 2.5 Gbps downstream and up to 1.25 Gbps upstream per GPON port.

Notes and warnings

Hints contain small explanations to help with learning to use the equipment more quickly, or additional information.

Notes contain important information about setting up the equipment.

Warnings inform the user of situations that may cause harm, incorrect system operation or loss of data.

Glossary

OLT. An optical line terminal is station equipment installed at the carrier's communication node. It is used in xPON (GPON, XGS-PON) technology as an aggregation node for connecting multiple subscriber terminals operating on this technology.

ONT. An optical network terminal is subscriber equipment installed at the subscriber's premises.

Bridge mode is an ONT operating mode in which services are transmitted transparently via the ONT. This mode requires additional equipment (PC or router) to be connected behind the ONT. In this connection layout, equipment connected to the ONT's LAN interfaces establishes a direct connection with the carrier's network equipment.

IGMP (Internet Group Management Protocol). A protocol for managing IPTV multicast streams in IPv4 networks.

Multicast is a type of group communication where data transmission is addressed to a group of destination computers simultaneously.

Profile cross-connect is a configuration profile for ONT services that is responsible for forming a logical data transmission link between the OLT and ONT in a specific VLAN.

Profile ports is a configuration profile for ONT services that is responsible for configuring the internal parameters of ONT LAN interfaces, forming rules for traffic passing through ONT, and actions with multicast traffic passing through ONT.

Profile management a configuration profile for ONT services that is responsible for configuring the parameters of ONT interaction with the ACS server.

ACS (Automatic Configuration Server) – CPE automatic configuration server (ONT).

Proposed network diagram

The proposed network section diagram includes a GPON access section for connecting end-user devices. It is assumed that a separate subscriber terminal will be installed in each room. All subscriber terminals are aggregated on an OLT installed in the technical room. Connection to the higher-level enterprise network can be made by connecting to an aggregation switch or directly to a router, depending on the enterprise network architecture. The general diagram will look as follows.

This diagram shows the logical connection between the OLT and ONT. It is assumed that the ONTs will be located directly in the rooms. Up to 128 ONTs can be connected to one GPON channel. Pizza-box format OLTs (LTP-8N, LTP-16N) have 8 and 16 GPON ports, respectively. Thus, the total number of ONTs that can be connected to one OLT is 1024 or 2048 ONTs, which may be sufficient to meet the needs of hotels. ONTs with 4 LAN ports can be used as subscriber terminals. In accordance with the cable plan for rooms, the structured cabling can be configured to have three or four 8P8C RJ-45 sockets in the room, each of which will be switched to a separate ONT LAN port. GPON technology allows each LAN port to be configured separately for specific services, each of which will be provided in its own unique VLAN. For example, the following distribution can be implemented:

LAN 1 – IP telephony;
LAN 2 – TV;
LAN 3 – wired Internet;
LAN 4 – reserve LAN, which can be configured for any of the services (in the configuration example, this port will be allocated to the Internet service).

This diagram does not include providing Wi-Fi connection via GPON. The implementation of Wi-Fi using access points and an Eltex controller is discussed in the guide Wi-Fi hotel network (hotel Wi-Fi diagram) guide.

This guide does not cover the creation of cable infrastructure. However, it should be noted that the fiber optic line for the GPON distribution network must be designed and constructed correctly with the optical budget taken into account.

Possible product solutions

Possible variants of equipment to be used for the given diagram include the following:

GPON OLT

Following OLT models can be used as the GPON station terminals.

Model	Number of uplink ports	Type of uplink ports	Number of PON ports	Operation mode of PON ports
Eltex LTP-8N	4	4 x 10GE (SFP+)/1GE (SFP)	8	GPON
Eltex LTP-16N	8	8 x 10GE (SFP+)/1GE (SFP)	16	GPON

GPON ONT

Following ONT models can be used as the GPON subscriber terminals.

Model	Number of LAN ports	Type of LAN ports
NTU-RG-5420G-Wac	4	4 x 1G

The choice of this ONT model is determined by the number of ports available on the ONT and the number of clients that need to be connected via Ethernet in each room. These devices have a Wi-Fi module that can be disabled via software. Disabling the module for this configuration is necessary so that the Wi-Fi transceivers installed in the ONT do not affect the radio waves in the rooms and do not create unnecessary interference for the operation of Wi-Fi access points. The procedure for disabling Wi-Fi on the ONT is described in the OLT/ONT configuration section.

Equipment configuration and health check

Initial data for layout configuration

Assume that three services – high-speed Internet, IPTV and IP telephony – need to be provided to each room and, accordingly, to each ONT. The architecture for providing services to end users located in rooms is VLAN per service. Each of the services is received by the OLT from the higher-level enterprise network in its service VLAN:

VLAN 2149 for Internet service;
VLAN 30 for IPTV service;
VLAN 3149 for IP telephony (VoIP) service.

The following VLANs are additionally used:

VLAN 4094 – internal ACS (this VLAN will only function within the OLT. The VLAN number for ACS must not overlap with other service VLANs);
VLAN 100 – management.

This diagram assumes that the OLT is included in the enterprise management network. VLAN 100 will be used as an example. It is assumed that this VLAN is also used to manage other hosts in the enterprise network. Depending on the current enterprise network diagram, this VLAN's number can be changed to another during configuration.

This diagram also requires disabling the Wi-Fi modules, which are enabled by default. For this purpose, the built-in ACS (Automatic Configuration Server) on the OLT will be used, interacting with the ONT via CWMP. A template for disabling Wi-Fi transceivers will be created on the ACS server and applied to all ONTs. VLAN 4094, which exists only within the OLT, is configured for ONT interaction with the ACS server.

TV broadcasting in this example is implemented using multicast. It is assumed that there is a multicast source in VLAN 2149 on the enterprise network, or that multicast is supplied by the service provider and enters VLAN 2149 on the enterprise network. Depending on the current enterprise network layout, the number of this VLAN may be changed to another during configuration.

In this example, the telephony service is implemented as a VoIP service by connecting SIP phones to the LAN ports of ONTs in the rooms. It is assumed that there is a SIP server in VLAN 3149 on the enterprise network, or that the VoIP service is supplied by the service provider and enters VLAN 3149 on the enterprise network. Depending on the current enterprise network layout, the number of this VLAN may be changed to another during configuration.

SIP phones are configured manually on the phones themselves or in a centralized manner using the enterprise network or service provider resources. In this case, OLT+ONT act as a bridge for transparent transmission of telephony service traffic to the network.

The detailed diagram of the configuration is provided below.

Configuring OLT and ONT in CLI

This section describes the procedures for configuring OLT and ONT functionality. As an example, we will configure the PON part for OLT LTP-16N and three ONT NTU-RG-5420G-Wac to implement this layout. All subscriber terminals in this example are physically connected to the same PON tree on the OLT PON port 1 interface. It is necessary to configure service VLANs on uplink interfaces in which subscriber services are provided for communication with the higher-level enterprise network, as well as on OLT downlink PON interfaces and ONT LAN interfaces for end customers to receive services. The higher-level network, in turn, connects to the provider's network. Internet, IPTV, and VoIP services can be supplied by the service provider.

The initial OLT configuration in terms of management settings for network connection can be performed via the OOB interface or via the console interface. For more details on configuring management parameters, refer to the OLT user documentation and the user manual. Example of configuring OLT management parameters for this layout:

LTP-16N# configure terminal							#switching to OLT configuration mode
LTP-16N(configure)# management ip 10.10.0.4			#specifying IP addres of the OLT in the management network
LTP-16N(configure)# management mask 255.255.0.0		#specifying the management subnet mask
LTP-16N(configure)# management gateway 10.10.0.1	#specifying the default route
LTP-16N(configure)# management vid 100				#specifying VLAN for OLT management
LTP-16N(configure)# interface front-port 1
LTP-16N(config)(if-front-1)# vlan allow 100			#configuring management VLAN on the OLT uplink interface
LTP-16N(configure)# do commit						#applying configuration
LTP-16N(configure)# do save							#saving the changes to the non-volatile memory

ONT configuration details

Configuration identifiers are: interface ont 1/1, interface ont 1/2, interface ont 1/3;
All services are provided at the LAN port egress in untagged mode;
Four LAN interfaces are configured using OMCI with OLT;
Each ONT service provided will have its own cross-connect profile;
In addition to configuring services on LAN ports in bridge mode, a service L3 WAN interface is created on the ONT using OMCI and OLT to interact with the auto-configuration server built into the OLT.

Configuration procedure

Creating the cross-connect and ports service profiles for ONT.

LTP-16N# configure terminal												#switching to OLT configuration mode
LTP-16N(configure)# profile cross-connect Internet						#switching to the Internet service profile configuration mode
LTP-16N(config)(profile-cross-connect-Internet)# ont-mode bridge 		#specifying ONT operating mode as bridge
LTP-16N(config)(profile-cross-connect-Internet)# bridge group 20		#specifying the bridge group number (any number, must match the number in profile ports)
LTP-16N(config)(profile-cross-connect-Internet)# outer vid 2149			#specifying the service VLAN ID for the Internet service
LTP-16N(config)(profile-cross-connect-Internet)# user vid untagged		#specifying the VLAN ID at the egress of the LAN ONT
LTP-16N(config)(profile-cross-connect-Internet)# exit
LTP-16N(configure)# profile cross-connect VoIP                 			#switching to the VoIP service profile configuration mode
LTP-16N(config)(profile-cross-connect-VoIP)# ont-mode bridge 			
LTP-16N(config)(profile-cross-connect-VoIP)# bridge group 30			
LTP-16N(config)(profile-cross-connect-VoIP)# outer vid 3149				
LTP-16N(config)(profile-cross-connect-VoIP)# user vid  untagged			
LTP-16N(config)(profile-cross-connect-VoIP)# exit
LTP-16N(configure)# profile cross-connect IPTV							#switching to the IPTV service profile configuration mode                    
LTP-16N(config)(profile-cross-connect-IPTV)# ont-mode bridge
LTP-16N(config)(profile-cross-connect-IPTV)# bridge group 40
LTP-16N(config)(profile-cross-connect-IPTV)# outer vid 30
LTP-16N(config)(profile-cross-connect-IPTV)# user vid untagged
LTP-16N(config)(profile-cross-connect-IPTV)# multicast enable
LTP-16N(config)(profile-cross-connect-IPTV)# exit
LTP-16N(configure)# profile cross-connect ACS                 			#switching to the ACS profile configuration mode
LTP-16N(config)(profile-cross-connect-ACS)# ont-mode bridge
LTP-16N(config)(profile-cross-connect-ACS)# outer vid 4094
LTP-16N(config)(profile-cross-connect-ACS)# iphost enable               #enable creating an L3 WAN interface on ONT for the service
LTP-16N(config)(profile-cross-connect-ACS)# exit
LTP-16N(configure)# profile ports Services
LTP-16N(config)(profile-ports-Services)# igmp multicast dynamic-entry 1 vid 30 group 224.0.0.1 239.255.255.254	#specifying the allowed range of multicast groups for ONT
LTP-16N(config)(profile-ports-Services)# port 1 bridge group 30												    #specifying the bridge group number for the VoIP service for LAN1
LTP-16N(config)(profile-ports-Services)# port 2 multicast enable												#enabling multicast processing on LAN2
LTP-16N(config)(profile-ports-Services)# port 2 bridge group 40													#specifying the bridge group number for the IPTV service for LAN2
LTP-16N(config)(profile-ports-Services)# port 2 igmp downstream tag-control remove-tag							#rule for removing the VLAN tag for downstream multicast
LTP-16N(config)(profile-ports-Services)# port 2 igmp downstream vid 30											#VLAN ID for downstream multicast traffic
LTP-16N(config)(profile-ports-Services)# port 2 igmp upstream tag-control add-tag								#rule for adding VLAN tag for upstream multicast
LTP-16N(config)(profile-ports-Services)# port 2 igmp upstream vid 30										    #VLAN ID for upstream multicast traffic                                            
LTP-16N(config)(profile-ports-Services)# port 3 bridge group 20                                                 #specifying the bridge group number of the Internet service for LAN3
LTP-16N(config)(profile-ports-Services)# port 4 bridge group 20                                                 #specifying the bridge group number of the Internet service for LAN4
LTP-16N(config)(profile-ports-Services)# exit
LTP-16N(configure)# profile management ACS																		#creating a profile for ONT interaction with the ACS server
LTP-16N(config)(profile-management-ACS)# username acs
LTP-16N(config)(profile-management-ACS)# password acsacs
LTP-16N(config)(profile-management-ACS)# url http://192.168.200.1
LTP-16N(config)(profile-management-ACS)# exit
LTP-16N(config)# do commit 												#applying configuration
LTP-16N(config)# do save												#saving the changes to the non-volatile memory

Configuring service VLAN on the OLT uplink interface, enabling IGMP snooping.

LTP-16N(configure)# vlan 30																	#switching to edit mode for VLAN 30 of the internal OLT switch
LTP-16N(config)(vlan-30)# name IPTV															#specifying the VLAN name
LTP-16N(config)(vlan-30)# exit
LTP-16N(configure)# vlan 2149                                                               #switching to edit mode for VLAN 2149 of the internal OLT switch
LTP-16N(config)(vlan-2149)# name Internet 													#specifying the VLAN name
LTP-16N(config)(vlan-2149)# exit
LTP-16N(configure)# vlan 3149                                                               #switching to edit mode for VLAN 3149 of the internal OLT switch
LTP-16N(config)(vlan-3149)# name VoIP 														#specifying the VLAN name
LTP-16N(config)(vlan-3149)# exit
LTP-16N(configure)# interface front-port 1                                                  #switching to edit mode for the front-port 1 uplink interface
LTP-16N(config)(if-front-1)# vlan allow 30,2149,3149									    #adding vlan to uplink interface in tagged mode (general)
LTP-16N(config)(if-front-1)# do commit
LTP-16N(config)(if-front-1)# exit
LTP-16N(configure)# ip igmp snooping enable													#enabling igmp snooping
LTP-16N(configure)# do commit
LTP-16N(configure)# do save
LTP-16N(configure)# exit

Configuring the built-in ACS server for interacting with ONT via TR-069. By default, the ACS server has the following settings:
- IP address: 192.168.200.1;
- ACS server subnet mask: 255.255.248.0;
- URL: http://192.168.200.1:9595;
- username: acs;
- password: acsacs.
When configuring the built-in ACS server, the configuration of these parameters will be skipped.

LTP-16N# configure terminal																	#switching to OLT configuration mode                            
LTP-16N(configure)# ip acs																	#switching to built-in ACS server configuration mode
LTP-16N(config)(acs)# acs-server enable                                                     #enabling the built-in ACS server
LTP-16N(config)(acs)# acs-server vlan 4094                                                  #configuring VLAN for the built-in ACS; this VLAN will only operate within the OLT
LTP-16N(config)(acs)# dhcp-server enable												    #activating the built-in DHCP server for interaction between the ONT and ACS servers
LTP-16N(config)(acs)# dhcp-server option-43 enable                                          #activating option 43 on the built-in DHCP server to transfer information about the ACS server to the ONT 
LTP-16N(config)(acs)# dhcp-server range 192.168.200.2 192.168.207.254						#configuring the address pool of the built-in DHCP server available for assignment to ONT (corresponds to ACS subnet)
LTP-16N(config)(acs)# exit
LTP-16N(configure)# do commit
LTP-16N(configure)# do save

The subnet used for the ACS server operation must not overlap with other subnets (e.g, the management subnet) configured on the OLT.

Registering ONT on OLT and assigning configuration to ONT.

LTP-16N# show interface ont 1 connected															#displaying list of connected ONTs and their PON-serial (ONTs must be connected to the OLT when entering the command)
LTP-16N# configure terminal																		#switching to OLT configuration mode                            
LTP-16N(configure)# interface ont 1/1															#switch to ont 1/1 editing mode (link number / ont id on the link)
LTP-16N(config)(if-ont-1/1)# serial ELTX8500011C                                        		#specifying pon-serial of the ONT (can be copied from the list of connected devices)
LTP-16N(config)(if-ont-1/1)# description HotelRoom_101                                          #specifying ONT descripton, the room number can be specified here
LTP-16N(config)(if-ont-1/1)# service 1 profile cross-connect Internet dba dba1					#assigning the cross-connect profile for Internet service to the ONT
LTP-16N(config)(if-ont-1/1)# service 2 profile cross-connect VoIP dba dba1						#assigning the cross-connect profile for VoIP service to the ONT
LTP-16N(config)(if-ont-1/1)# service 3 profile cross-connect IPTV dba dba1						#assigning the cross-connect profile for IPTV service to the ONT
LTP-16N(config)(if-ont-1/1)# service 4 profile cross-connect ACS dba dba1						#assigning the cross-connect profile for the TR-069 service to the ONT
LTP-16N(config)(if-ont-1/1)# profile ports Services                                             #assigning the ports profile to the ONT
LTP-16N(config)(if-ont-1/1)# profile management ACS                                             #assigning the management profile to the ONT
LTP-16N(config)(if-ont-1/1)# exit
LTP-16N(configure)# interface ont 1/2															#switching to ONT configuration mode 1/2
LTP-16N(config)(if-ont-1/2)# serial ELTX850000F4												#specifying pon-serial of the ONT
LTP-16N(config)(if-ont-1/2)# description HotelRoom_102                                          #specifying ONT descripton, the room number can be specified here
LTP-16N(config)(if-ont-1/2)# service 1 profile cross-connect Internet dba dba1					#assigning the cross-connect profile for Internet service to the ONT
LTP-16N(config)(if-ont-1/2)# service 2 profile cross-connect VoIP dba dba1						#assigning the cross-connect profile for VoIP service to the ONT
LTP-16N(config)(if-ont-1/2)# service 3 profile cross-connect IPTV dba dba1						#assigning the cross-connect profile for IPTV service to the ONT
LTP-16N(config)(if-ont-1/2)# service 4 profile cross-connect ACS dba dba1						#assigning the cross-connect profile for the TR-069 service to the ONT
LTP-16N(config)(if-ont-1/2)# profile ports Services                                             #assigning the ports profile to the ONT
LTP-16N(config)(if-ont-1/2)# profile management ACS                                             #assigning the management profile to the ONT
LTP-16N(config)(if-ont-1/2)# exit
LTP-16N(configure)# interface ont 1/3															#switching to ONT configuration mode 1/3
LTP-16N(config)(if-ont-1/3)# serial ELTX850000E0												#specifying pon-serial of the ONT
LTP-16N(config)(if-ont-1/3)# description HotelRoom_103                                          #specifying ONT descripton, the room number can be specified here
LTP-16N(config)(if-ont-1/3)# service 1 profile cross-connect Internet dba dba1					#assigning the cross-connect profile for Internet service to the ONT
LTP-16N(config)(if-ont-1/3)# service 2 profile cross-connect VoIP dba dba1						#assigning the cross-connect profile for VoIP service to the ONT
LTP-16N(config)(if-ont-1/3)# service 3 profile cross-connect IPTV dba dba1						#assigning the cross-connect profile for IPTV service to the ONT
LTP-16N(config)(if-ont-1/3)# service 4 profile cross-connect ACS dba dba1						#assigning the cross-connect profile for the TR-069 service to the ONT
LTP-16N(config)(if-ont-1/3)# profile ports Services                                             #assigning the ports profile to the ONT
LTP-16N(config)(if-ont-1/3)# profile management ACS                                             #assigning the management profile to the ONT
LTP-16N(config)(if-ont-1/3)# exit
LTP-16N(configure)# do commit
LTP-16N(configure)# do save
LTP-16N(configure)# exit

When configuring ONT services in the example, the default bandwidth allocation profile dba1 is assigned. This profile can be used for all ONT services. For more information on configuring dba profiles, refer to the OLT user manual, which can be found on the official Eltex website.

The next step is to make sure that the ONTs are registered and configured without errors. After that, proceed to assigning the configuration to the built-in ONT interfaces on the ACS server. The only setting of internal ONT interfaces you need to change is disabling the Wi-Fi transceivers.

Please note: Working with ONT in the built-in ACS CLI is done via PON serial ONT. The PON serial display format in the ACS CLI is always in HEX, regardless of the format configured in the main OLT CLI. For example, when the serial number ELTX8500011C is displayed in the main CLI, the same serial number will be displayed as 454C54588500011C in the ACS CLI. If necessary, the PON serial display format in the main CLI can be converted to HEX using the system ont-sn-format numerical parameter.

LTP-16N# show interface ont 1 connected											#display list of connected ONTs and their PON-serial numbers (ONTs must be in OK status)
LTP-16N# show mac interface pon-port 1                                          #display list of MAC addresses from connected ONTs; at least the addresses in the ACS service svid (svid 4094) must be present
LTP-16N# acs																	#switch to working with built-in ACS server of the OLT
LTP-16N(acs)# profile                                                           #switch to working with configuration profiles of the built-in ACS server
LTP-16N(acs-profile)# add profile no_wi-fi										#create a profile named “no_wi-fi” (the profile name can be different)
LTP-16N(acs-profile)# profile no_wi-fi											#switch to the editing mode of the created profile to specify the parameters that disable the 2.4 and 5GHz Wi-Fi modules
LTP-16N(acs-profile-name='no_wi-fi')# set property "InternetGatewayDevice.LANDevice.1.WLANConfiguration.1.Enable" "0" nocheck
LTP-16N(acs-profile-name='no_wi-fi')# set property "InternetGatewayDevice.LANDevice.1.WLANConfiguration.5.Enable" "0" nocheck
LTP-16N(acs-profile-name='no_wi-fi')# exit										#exit ACS profile editing mode
LTP-16N(acs-profile)# exit
LTP-16N(acs)# ont																#switch to working with ONT
LTP-16N(acs-ont)# show list all													#view the list of ONTs detected on the built-in ACS server. The list should contain all previously activated ONTs
LTP-16N(acs-ont)# ont 454C54588500011C											#switch to working with a specific ONT
LTP-16N(acs-ont-sn='454C54588500011C')# set profile no_wi-fi					#assign the ACS profile
LTP-16N(acs-ont-sn='454C54588500011C')# exit									#stop working with a specific ONT
LTP-16N(acs-ont)# ont 454C5458850000F4                                          #repeate previous actions for all ONT being cofigured
LTP-16N(acs-ont-sn='454C5458850000F4')# set profile no_wi-fi					
LTP-16N(acs-ont-sn='454C5458850000F4')# exit									
LTP-16N(acs-ont)# ont 454C5458850000E0                                            
LTP-16N(acs-ont-sn='454C5458850000E0')# set profile no_wi-fi					
LTP-16N(acs-ont-sn='454C5458850000E0')# exit									
LTP-16N(acs-ont)# exit
LTP-16N(acs)# exit																#exit to the main CLI
LTP-16N# send omci default interface ont 1/1-3                                  #to apply settings via TR-069, it is recommended to reset the ONT to factory settings

Verifying the correct application of configuration and service operation

LTP-16N# show interface ont 1/1-3 state											#checking ONT status after configuration
LTP-16N# show mac interface ont 1/1-3											#checking the MAC address table for addresses connected to ONT devices
LTP-16N# show interface ont 1/1-3 ports											#checking the status of ONT LAN ports (if necessary)
LTP-16N# show ip igmp snooping groups vlan 30									#checking multicast group subscriptions when turning on the TV channel on ONT

Additional features

DHCP snooping

The DHCP Snooping feature makes it possible to monitor DHCP user sessions from the ONT. Also, enabling DHCP Snooping is necessary for the DHCP Option 82 substitution feature to work, which allows modifying DHCP user requests by adding additional vendor-specific tags to DHCP packets. A complete list of possible parameters (lexemes) that can be added is provided in the OLT user manual.

LTP-16N# configure terminal                                                             #switch to OLT configuration mode  
LTP-16N(configure)# ip dhcp                                                             #switch to dhcp block configuration mode 
LTP-16N(config)(dhcp)# snooping enable		 											#enable snooping
LTP-16N(config)(dhcp)# exit 
LTP-16N(configure)# profile dhcp-opt82 test											    #switch to creating and editing dhcp-opt-82 profile named "test"
LTP-16N(config)(profile-dhcp-opt82-test)# overwrite-opt82 enable
LTP-16N(config)(profile-dhcp-opt82-test)# circuit-id format %PONSERIAL%/%ONTID%		    #specifying the circuit-id tag format
LTP-16N(config)(profile-dhcp-opt82-test)# remote-id format %OPT82_RID%				    #specifying the remote-id tag format
LTP-16N(config)(profile-dhcp-opt82-test)# exit
LTP-16N(configure)# ip dhcp

#The created profile can be applied globally on the OLT for all ONTs and service VLANs:
LTP-16N(config)(dhcp)# opt82 profile test

#Alternatively, the profile can be applied globally to all ONTs, but for a specific VLAN:
LTP-16N(config)(dhcp)# opt82 profile test vid 2149    								

#The profile can also be applied selectively to ONT:
LTP-16N(config)(dhcp)# exit
LTP-16N(configure)# interface ont 1/1
LTP-16N(config)(if-ont-1/1)# service 1 custom dhcp-opt82-profile service_1
LTP-16N(config)(if-ont-1/1)# exit
LTP-16N(configure)# exit
LTP-16N# commit
LTP-16N# save

#With DHCP snooping enabled, user DHCP sessions can be monitored:
LTP-16N# show ip dhcp sessions interface ont 1/1										#selectively by ONT (or a range of ONTs)
LTP-16N# show ip dhcp sessions interface pon-port 1										#by all ONTs of the specified PON port (or range of PON ports)
LTP-16N# show ip dhcp sessions vlan 2149												#by the specified S-VLAN

OLT web interface

The OLT web interface can be used to configure and monitor the OLT status. By default, the web interface is disabled and must be enabled via the CLI.

LTP-16N# configure terminal
LTP-16N(configure)# ip web enable														#enabling WEB service

#There are multiple privilege levels for WEB - administrator/operator/viewer. By default, only the user named admin with administrator rights has access to WEB. Examples of editing privileges for WEB:
LTP-16N(configure)# user admin web-privilege operator 									#changing the WEB access level to operator for the existing admin user
LTP-16N(configure)# user webadmin password webpassword web-privilege administrator		#creating a webadmin user with administrator-level WEB privileges
LTP-16N(configure)# user monitoring password monitoring web-privilege viewer		    #create a user named monitoring with WEB viewer level privileges
LTP-16N(configure)# no user operator web-privilege 										#deny WEB access to the operator user
LTP-16N(configure)# do commit
LTP-16N(configure)# do save

Now, let's check out the main sections of the OLT web interface that can be used to monitor OLTs and the subscriber terminals connected to them.

"Monitoring → OLT → Device Information" page: This page displays basic information about the device: hostname, system time, uptime, firmware version, power supply information, built-in sensor temperature readings, fan status, etc.

"Monitoring → OLT → IGMP Snooping Groups" page: This page displays information about IGMP groups requested on all OLT ports. The information is presented in two tables:

Total number of requested groups in each VLAN;
Individual requested groups.

The number of rows displayed in the table can be changed, and various filters can be applied to the information output.

"Monitoring → OLT → System Logs" page: This page contains a list of files with information about system operation (log files). The last 500 lines of the log file can be viewed in the web interface. To view the entire file, you need to download it.

"Monitoring → OLT → MAC Address Table" page: This page displays all MAC addresses trained on the OLT. Below the table, the number of rows displayed can be changed to 10, 20, 50, or 100. For convenience, a group of filters or sorting by the selected table column can be used to search for MAC addresses.

"Monitoring → OLT → Ports State" page: This page contains three main blocks of information:

Graphical display of OLT;
PON port table;
Front port table.

The graphical display of OLT makes it possible to perform operations for each port (by calling up the menu with the right mouse button). Reconfiguration and disconnection operations are available for the PON port. For the Front port, only disconnection is available. The PON-port and Front-port tables contain basic information about the status of the ports without the possibility of editing.

"Monitoring → ONT → DHCP Sessions" page: This page displays data about currently active DHCP sessions. The information is read-only and only available when DHCP snooping is enabled.

"ONT List" page: This section displays information about all ONTs registered on the device and physically connected to ONT PON channels. Above the table are buttons for creating a new ONT configuration and changing the configuration of existing ONTs as well as quick action icons for ONTs (reboot, reconfigure, reset to factory settings). The icons for operations with configuration and quick actions become active when one or more ONTs are selected. The following icons are available:

– creating an ONT configuration;

– from left to right: delete ONT configuration, reboot ONT, reconfigure ONT, reset ONT to factory settings.

In the table opposite each ONT, an additional context menu of actions with the selected ONTs is available – . By clicking this button, the following actions are available:

Show ONT status;
Edit ONT configuration:
Show MAC address table;
Show ONT counters;
Add ONT configuration (available only for UNACTIVATED ONT).

General view of the page:

Appendix. OLT configuration set up in the guide

Below is the configuration that is set up in this guide in text format. This configuration corresponds to the OLT configuration structure and can be uploaded to the OLT either by pasting the content via a terminal using a Telnet/SSH/Console connection, or by saving the configuration to a file server on the management network and then uploading the configuration file to the OLT over the network. The upload is performed using the command:

LTP-16N# copy tftp://192.168.11.100/config.txt fs://config

#tftp - protocol used to download a file over the network; ftp and http can also be used
#192.168.11.100 - address of the file server on the management network
#config.txt - name of the configuration file on the server
#fs://config - local configuration storage on the OLT

Pre-made configuration:

configure terminal
    management ip 10.10.0.4
    management mask 255.255.0.0
    management gateway 10.10.0.1
    management vid 100
    profile cross-connect Internet
        ont-mode bridge
        bridge group 20
        outer vid 2149
    exit
    profile cross-connect VoIP
        ont-mode bridge
        bridge group 30
        outer vid 3149
    exit
    profile cross-connect IPTV
        ont-mode bridge
        bridge group 40
        outer vid 30
        multicast enable
    exit
    profile cross-connect ACS
        ont-mode bridge
        outer vid 4094
        iphost enable
    exit
    profile ports Services
        igmp multicast dynamic-entry 1 vid 30 group 224.0.0.1 239.255.255.254
        port 1 bridge group 30
        port 2 multicast enable
        port 2 bridge group 40
        port 2 igmp downstream tag-control remove-tag
        port 2 igmp downstream vid 30
        port 2 igmp upstream tag-control add-tag
        port 2 igmp upstream vid 30
        port 3 bridge group 20
        port 4 bridge group 20
    exit
    profile management ACS
        url http://192.168.200.1
        username acs
        password acsacs
    exit
    profile dhcp-opt82 test
        circuit-id format "%PONSERIAL%/%ONTID%"
        remote-id format "%OPT82_RID%"
        overwrite-opt82 enable
    exit
    ip dhcp
        snooping enable vlan 1-4094
        opt82 profile test vid 2149
    exit
    vlan 30
        name "IPTV"
    exit
    vlan 2149
        name "Internet"
    exit
    vlan 3149
        name "VoIP"
    exit
    interface ont 1/1
        description "HotelRoom_101"
        serial ELTX8500011C
        profile management "ACS"
        profile ports "Services"
        service 1 profile cross-connect "Internet" dba "dba1"
        service 2 profile cross-connect "VoIP" dba "dba1"
        service 3 profile cross-connect "IPTV" dba "dba1"
        service 4 profile cross-connect "ACS" dba "dba1"
    exit
    interface ont 1/2
        description "HotelRoom_102"
        serial ELTX850000F4
        profile management "ACS"
        profile ports "Services"
        service 1 profile cross-connect "Internet" dba "dba1"
        service 2 profile cross-connect "VoIP" dba "dba1"
        service 3 profile cross-connect "IPTV" dba "dba1"
        service 4 profile cross-connect "ACS" dba "dba1"
    exit
    interface ont 1/3
        description "HotelRoom_103"
        serial ELTX850000E0
        profile management "ACS"
        profile ports "Services"
        service 1 profile cross-connect "Internet" dba "dba1"
        service 2 profile cross-connect "VoIP" dba "dba1"
        service 3 profile cross-connect "IPTV" dba "dba1"
        service 4 profile cross-connect "ACS" dba "dba1"
    exit
    ip igmp snooping enable
    interface front-port 1
        vlan allow 30,100,2149,3149
    exit
    ip acs
        acs-server enable
        acs-server vlan 4094
        dhcp-server enable
        dhcp-server option-43 enable
        dhcp-server range 192.168.200.2 192.168.207.254
    exit
    ip web enable
exit
acs
profile
add profile "no_wi-fi"
profile "no_wi-fi"
set property "InternetGatewayDevice.LANDevice.1.WLANConfiguration.1.Enable" "0" nocheck
set property "InternetGatewayDevice.LANDevice.1.WLANConfiguration.5.Enable" "0" nocheck
exit
exit
ont
add ont "454C54588500011C" profile="no_wi-fi"
add ont "454C5458850000F4" profile="no_wi-fi"
add ont "454C5458850000E0" profile="no_wi-fi"
exit
exit
commit
exit

Before uploading the configuration to the OLT, the configuration parameters can be edited in a text editor. This way, VLAN numbers, ONT serial numbers and other parameters can be changed.

Дерево страниц

GPON hotel network (hotel GPON diagram)