Huawei OptiX OSN 550 Configuration Manual page 274

4 Configuring Ethernet Services
Background Information
If the Ethernet switching boards in the actual application scenarios are different from the boards
in this example, you need to learn about the requirements for configuring specific boards.
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The IEEE 802.1ad provider bridge supports ports with the C-Aware and S-Aware attributes only.
The C-Aware ports are used to add and strip the S-VLAN tags. The S-Aware ports are used to
transparently transmit the S-VLAN tag.
The IEEE 802.1ad provider bridge supports the following operation types:
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This topic describes the four operation types when Bridge Switch Mode of the IEEE 802.1ad
provider bridge is set to IVL/Ingress Filter Enabled.
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In the case of the four operation types, the following conditions must be met before the packets
leave a port:
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For the EVPLAN services supported by Ethernet switching boards, see
Support Capability of Ethernet
For the VCTRUNK binding requirements of Ethernet transparent transmission boards, see
6.2 Requirements for Binding Paths with VCTRUNKs on Ethernet
Adding the S-VLAN tag based on the port
Adding the S-VLAN tag based on the port and C-VLAN
Performing port mounting based on the port
Performing port mounting based on the port and the S-VLAN
Adding the S-VLAN based on the port: The packets that enter the C-Aware port are added
with the preset S-VLAN tag, and are forwarded in the bridge according to the S-VLAN
filtering table. Before the packets leave the C-Aware port, the S-VLAN tag is stripped.
Adding the S-VLAN tag based on the port and C-VLAN: The entry detection is performed
for the packets that enter the C-Aware port. Then, the corresponding S-VLAN tags are
added to the packets according to the mapping relation between the C-VLAN tags and the
S-VLAN tags of the packets. If the mapping relation does not exist, the packets are
discarded. After the S-VLAN tags are added, the packets enter the bridge, where the packets
are forwarded according to the S-VLAN filtering table. Before the packets leave the C-
Aware port, the S-VLAN tag is stripped.
NOTE
l The same C-Aware port supports different C-VLAN tags being mapped to different S-VLAN
tags, but does not support the same C-VLAN tag being mapping to multiple S-VLAN tags.
Performing port mounting based on the port: The packets that enter the S-Aware port are
not filtered. Instead, the S-VLAN switch is performed directly. The packets must have the
S-VLAN tags. Otherwise, the packets are discarded. When the packets leave the S-Aware
port, the packets are transparently transmitted.
Performing port mounting based on the port and the S-VLAN: The entry filtering is
performed according to the preset S-VLAN tag. The packets that do not belong to the S-
VLAN are discarded. Then, the packets are forwarded according to the S-VLAN filtering
table. When the packets leave the S-Aware port, the packets are transparently transmitted.
The port is contained in the S-VLAN filtering table that is created by the user.
The S-VLAN ID corresponding to the port must be specified when the user manually
mounts the port to the bridge.
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Copyright © Huawei Technologies Co., Ltd.
OptiX OSN 550 Multi-Service CPE Optical Transmission
Boards.
System
Configuration Guide
6.1 Service
Boards.
Issue 02 (2011-06-30)