Table 4-7 Types Of Bridges Supported By The Ethernet Boards - Huawei OptiX OSN 550 Configuration Manual

OptiX OSN 550 Multi-Service CPE Optical Transmission
System
Configuration Guide
NOTE
Bridge Type
As listed in

Table 4-7 Types of bridges supported by the Ethernet boards

Bridge Type
IEEE 802.1d MAC bridge
IEEE 802.1q Virtual Bridge
IEEE 802.1ad
Provider Bridge
l
l
l
Issue 02 (2011-06-30)
To forward a Layer 2 switching service, a bridge must learn the MAC address. A bridge learns the MAC
address through one of the following methods: shared VLAN learning (SVL) and independent VLAN
learning (IVL).
l When the bridge adopts the SVL learning mode, the entry in the MAC address table is created according
to the source MAC address and source port of the data frame. The entry is valid for all VLANs.
l When the bridge adopts the IVL learning mode, the entry in the MAC address table is created according
to the source MAC address, VLAN ID, and source port of the data frame. The entry is valid for only
the VLAN.
Table 4-7, the Ethernet boards support three types of bridges.
1
2
IEEE 802.1d MAC bridge: The IEEE 802.1d MAC bridge does not check the contents of
the VLAN tags that are in the data frames, but performs Layer 2 switching according to
the destination MAC addresses of the data frames.
IEEE 802.1q bridge: The IEEE 802.1q bridge supports data 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.
The 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:
1. This bridge does not check the contents of the VLAN tags that are in the data frames,
but performs Layer 2 switching according to the destination MAC addresses of the
data frames.
2. 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 the S-
VLAN IDs of the data frames.
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Bridge Switch Mode
SVL/Ingress Filter
Disable
IVL/Ingress Filter
Enable
SVL/Ingress Filter
Disable
IVL/Ingress Filter
Enable
4 Configuring Ethernet Services
Bridge Learning Ingress
Mode Filter
SVL Disabled
IVL Enabled
SVL Disabled
IVL Enabled
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