Scenario VLAN Planning VLAN Translation
ONU OLT
Ethernet base
station access
service (in QinQ
VLAN mode)
Single VLAN tag: ONUs
and the OLT use single
VLAN tags. Service packets
are forwarded based on
single VLAN tags after
being transmitted from the
OLT upstream to the metro
network. In this way, a large
number of VLANs for the
metro network will be
occupied if there are many
OLTs.
Generally, four VLANs are
planned for Ethernet base
station access service, which
are used for:
l Clock synchronization
l Voice and data services
of base stations
l Base station
management
l ONU management
1. Different user
VLANs are
planned for
different
services
(service packets
with different
destination
addresses or
paths) of base
stations.
2. User VLANs of
packets sent
from the base
stations are
translated to a
specified
CVLAN based
on service
types.
The OLT
transparently
transmits packets
with CVLANs
from ONUs.
(Recommended) Double
VLAN tags: Each OLT uses
double VLAN tags, an outer
VLAN tag (SVLAN) and
inner VLAN tag (CVLAN).
SLVANs are the same but
CLVANs are different. In
this way, the number of
VLANs required for the
metro network is
significantly reduced.
1. Different user
VLANs are
planned for
different
services
(service packets
with different
destination
addresses or
paths) of base
stations.
2. User VLANs of
packets sent
from the base
stations are
translated to a
specified
CVLAN based
on service
types.
The OLT adds an
SVLAN tag:
CVLAN<-
>SVLAN
+CVLAN.
SmartAX MA5600T/MA5603T/MA5608T Multi-service
Access Module
Commissioning and Configuration Guide
14 FTTM Configuration (Base Station Access)
Issue 01 (2014-04-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
1368
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