Service VLAN Tag Translation
CM OLT (Main Frame) Layer 3 MAN Device
Wireless
local area
network
(WLAN)
hotspot
radio
backhaul
service
The packets of the
WLAN hotspot
radio backhaul
service do not
carry a VLAN tag.
Two service flows
are created
between a CM and
a D-CMTS. One is
the default service
flow and the other
is the Wi-Fi
service flow.
CM management packets
and Wi-Fi packets carry
different VLAN tags.
The VLAN pre-configured
for the Wi-Fi packets must
be the same as that
configured in the CM
configuration file.
l When an OLT forwards
services at Layer 2, the
OLT transparently
transmits VLAN tags to
a MAN device.
l When an OLT forwards
services at Layer 3, the
OLT adds a unique
VLAN tag to the
packets of a service
type.
l When an OLT forwards
services at Layer 2, a
Layer 3 MAN device
forwards the services at
Layer 3 and adds a
unique VLAN tag to the
packets of a service
type.
l When an OLT forwards
services at Layer 3, a
Layer 3 MAN device
forwards the services at
Layer 3.
The VLAN planning principles are summarized as follows:
l HSI, VoIP, and CM management services for home users carry the same S-VLAN tag on
a layer 3 network.
l HSI, VoIP, and CM management services for home users carry the different S-VLAN tags
on a layer 2 telecom network. Service types can be identified based on VLANs.
l An OLT identifies the L2VPN enterprise and WLAN hotspot radio backhaul services by
S-VLAN tag.
NOTE
When planning a VLAN, ensure that the VLAN for the L2VPN service is different from S-VLANs.
15.2.5 VLAN Planning for Telecom Networks
Overview
With the development of hybrid fiber coaxial networks, CMTSs are evolving from traditional
CMTSs to coaxial media converters (CMCs) and the deployment location has been moved
downwards from distribution hubs to fiber nodes. In this case, the application of the CMTSs on
traditional telecom networks poses the following challenges:
l The number of access network layers is changed from two to five. Specifically, the original
layers CMTSs and cable modems (CMs) are enlarged to routers, convergence LAN
SmartAX MA5600T/MA5603T/MA5608T Multi-service
Access Module
Commissioning and Configuration Guide
15 OptiCable D-CMTS Configuration (MA5633 Working as
a Remote Extended Frame)
Issue 01 (2014-04-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
1532
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