GPON Integration Scenarios

by pk-admin Gpon
FTTx Internet Service Scenario

To achieve internet services at user home/office/building via FTTx ,multiple integrations implemented in Operator network from GPON toward MPLS Network & IGW and to improve resource also other elements CGN,DPI ,RADIUS .Briefly explained below :-

OLT-ONT/ONU Service

As OLT Broadcast All Data (GEM1,GEM2…) to ONTs, but in ONT it will filter using Port ID in GEM Frame. In Order to work GEM Protocol between OLT-ONT multiple elements need to configure in OLT/ONT. Brief Steps below

  • Bind ONT/ONU using LOID or SN.
  • Configure Traffic Profiles for Bandwidth Restrictions.
  • Bind TCONT(Upload BW) with GEM Ports (Virtual Ports between OLT-ONT).
  • Configure Service port for translating SVLAN & CVLAN.
  • Create Line/Remote(ZTE) or Line/Serv Profiles(Huawei) In case of large numbers of customers.
OLT–PEs–IGW PEs

From OLT-PE Uplink Eth-Trunk interface configured in order to Allow multiple service vlans (Internet:1588,Voice:1500 etc) and from PE vpls is configured peering with IGW PE ;binding int/Sub interface (For example interface Vlanif1588)

IGW-PEs–BRAS

Uplink Eth-Trunk interface configured in order to Allow multiple service vlans (Internet:1588,Voice:1500 etc).

ONT—BRAS/BNG:

How ONU/ONT modem at home receive WAN IP ?

PPOE or DHCP is configured in BRAS devices and clients are multiple ONT/ONUs Modems WAN port. Below is screenshot from ONT web GUI.IP address 100.74.75.19 is assigned by Gateway IP 100.74.75.254 BRAS/BNG Device.

  • BRAS/BNG : Enable PPOE Server on interface toward IGW-PE “Eth-Trunk1.1” (Bind multiple Vlans e.g internet1588) and creating local IP address Pool with gateway for assignment.
  • ONT: Configure PPOE Client configuration User/Password etc.

By using this method multiple IPs are assigned to multiple WANs in ONT for each service (Internet , Voice ,ACS etc).

Note: Above Assigned IP is Actually from Standard CGNAT IPs Range 100.64.0.0 and 100.127.255.255 . later it will translate to Public IPs using CGN (Basically its large scale NATing Setup) Commonly Large scale operators are using it to save Public IPs.

Comment :RADIUS authentication and RADIUS accounting are configured on the BRAS. The ONU/ONT obtains an IP address from the BRAS after passing the authentication. 

BRAS–IGWPE–IGW(IARs,IBRs)