SFU vs HGU

Created On4 lipca 2024

Last Updated On4 lipca 2024

byDaniel M

Document Date and version	2021.02.02
Revision	1

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ONTs can work in two different service-mode:

SFU – Single Family Unit

SFU – only bridge and fully controlled from the OLT (advanced VLAN operations – access/transparent etc)
That allows to prepare more complex configuration – such as QinQ tunnel or VLAN translation on the ONT.
Mainly used by individual home users, which only supports broadband access terminal function, the device has 1 or 4 Ethernet interfaces, providing Ethernet/IP services, supporting VoIP service (built-in IAD) and CATV service. It mainly used in FTTH occasions (also can be used with a home gateway to provide greater business capabilities).

HGU – Home Gateway Unit

HGU – bridge and router – basic configuration assign from OLT – service configuration on ONT (by WWW / provisioning method like xml, TR-069) through IP-HOST interface for MGMT.
This mainly used for individual home users, with home gateway function, equivalent to home gateway with GPON uplink interface.
Device has 1, 2, or 4 Ethernet interfaces, WLAN interfaces, providing Ethernet/IP services, which can support VoIP, IPTV/CATV service and TR-069 remote management. The device mainly used in FTTH solutions.

When You use Dasan OLT, to check the current service-mode of ONT please use command:

V5808(config-gpon-olt[1])# show onu service-mode 4
 OLT | ONU | STATUS | Serial No. | Service Mode | Service Oper    
   1 |   4 | Active | HALN086044b0 |         None |          HGU

Attention: do NOT switch ONT service mode manually via command below

V5808(config-gpon-olt[1])# onu service-mode 4 ?
hgu Home Gateway Unit
sfu Single Family Unit

HGU – Supported Service Scenarios

HGU mode allows to flow multiple traffic classes across VEIP.
All UNI interfaces are belonged to one VEIP and it cannot be controlled by OMCI.
This non-OMCI part can be controlled by Web and Auto provisioning.
Most OLT vendors support dual stack:
– IP-HOST #1 -> MGMT (WEB, XML provisioning) – configure by OMCI (from OLT)
– VEIP (non-OMCI : INTERNET, VoIP, IPTV services) – configure by ONT WEB or provisioning