
EVPLAN Services
EVPLAN services of different users need to share the bandwidth. Hence, the VLAN/QinQ
scheme needs to be used for differentiating the data of different users. If the services of different
users need to be configured with different quality levels, you need to adopt the corresponding
QoS scheme.
As shown in
, three branches of user G need to communicate with each other. Services
of user G need to be isolated from the services of user H. Hence, the IEEE 802.1q bridge needs
to be established on NE1 to achieve EVPLAN services.
IEEE 802.1q bridge: IEEE 802.1q bridge supports isolation by using one layer of VLAN tags.
This bridge checks the contents of the VLAN tags that are in the data frames and performs Layer
2 switching according to the destination MAC addresses and VLAN IDs.
Figure 4-5
EVPLAN services (IEEE 802.1q bridge)
NM
NE3
NE2
NE1
NE4
G3
PORT1
G2
PORT1
PORT2
H3
H2
PORT2
G1
H1
PORT5
PORT6
PORT5
VCTRUNK1
VCTRUNK2
VLAN 100
IEEE 802.1q bridge
PORT6
VCTRUNK1
VCTRUNK2
VLAN 200
IEEE 802.1q bridge
VCTRUNK
As shown in
, the VoIP services from user M and the HSI services from user N need
to respectively access the VoIP server and the HSI server. In this case, the operator needs to
separately groom the VoIP services and HSI services, and isolate the data on the transmission
network side. On NE1, the IEEE 802.1ad bridge must be established to support the EVPLAN
services.
IEEE 802.1ad bridge: The IEEE 802.1ad bridge supports data frames with two layers of VLAN
tags. This bridge adopts the outer S-VLAN tags to isolate different VLANs and supports only
the mounted ports whose attributes are C-Aware or S-Aware. This bridge supports the following
switching modes:
l
This bridge does not check the contents of the VLAN tags that are in the packets and
performs Layer 2 switching according to the destination MAC addresses of the packets.
4 Configuring Ethernet Services
OptiX OSN 550 Multi-Service CPE Optical Transmission
System
Configuration Guide
4-6
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Issue 02 (2011-06-30)