15.2.4 VLAN
Table 15-4
VLAN planning principles
Service
VLAN Tag Translation
CM
OLT (Main Frame)
Layer 3 MAN Device
Internet
access
service
The packets of the
Internet access
service do not
carry a VLAN tag.
A service flow is
created between a
cable modem
(CM) and a
distributed cable
modem
termination
system (D-
CMTS).
CM management packets
and high-speed Internet
(HSI) packets carry the
same VLAN tag.
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.
VoD service The packets of the
VoD service do
not carry a VLAN
tag.
A service flow is
created between a
CM and a D-
CMTS.
CM management packets
and electronic program
guide (EPG) packets carry
the same VLAN tag.
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.
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)
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