
Table 4-5
Processing mode of data frames on ports with different tags
Direction
Data Frame Type
Processing Mode
Tag aware
Access
Hybrid
Ingress port
Data frames with
VLAN tags
The data frames are
transparently
transmitted.
The data frames are
discarded.
The data frames are
transparently
transmitted.
Data frames without
VLAN tags
The data frames are
discarded.
The VLAN tags that contain
Default VLAN
ID
and
VLAN Priority
are added to the data
frames, and then the data frames are
transparently transmitted.
Egress port
Data frames with
VLAN tags
The data frames are
transparently
transmitted.
After the VLAN
tags are stripped
from the data
frames, the data
frames are
transparently
transmitted.
l
If the VLAN IDs
contained in the
data frames are
Default VLAN
ID
, the VLAN
tags are stripped
from the data
frames, and then
the data frames
are transparently
transmitted.
l
If the VLAN IDs
contained in the
data frames are
not
Default
VLAN ID
, the
data frames are
transparently
transmitted.
NOTE
The tag setting is valid only when the following conditions are met:
l
Port Type of the port is set to PE or UNI.
l
The entry detection function is enabled. When the Ethernet switching board works in the Ethernet
transparent transmission state and when the entry detection function is disabled, the port transparently
transmits the received data frames regardless of whether the data frames carry VLAN tags.
Based on the features of tag aware, access, and hybrid, adhere to the following principles when
setting the tag for a port:
l
If the data packets transmitted from the interconnected equipment carry VLAN tags, set
TAG
to
Tag Aware
.
l
If the data packets transmitted from the interconnected equipment do not carry VLAN tags,
set
TAG
to
Access
.
l
If the data packets transmitted from the interconnected equipment may carry VLAN tags,
set
TAG
to
Hybrid
.
4 Configuring Ethernet Services
OptiX OSN 550 Multi-Service CPE Optical Transmission
System
Configuration Guide
4-18
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Issue 02 (2011-06-30)