Skip to main content

Transparent Bridge

Introduction​

A transparent bridge is used to configure multiple ports in a group that can only forward traffic between those ports. The ports configured in a transparent bridge is isolated from other ports, including the CPU.

Overview​

The figure below shows a configured switch where ports 1 through 4 is configured as normal switched ports. Ports 5 and 6 is configured in a transparent bridge, thus traffic passing trough those ports are isolated from the other ports.

                   Switch A
             .--------------------.
-------------+ 1 -----\ /------ 2 +-------------
             |         X          |
-------------+ 3 -----/ \------ 4 +-------------
             |                    |
-------------+ 5 -------------- 6 +-------------
             '--------------------'

Figure 1: Transparent bridge for ports 5 and 6

Configuration​

Transparent bridges is configured from the port contex, setting the bridge id for port(s).

example:/#> configure 
example:/config/#> port ethX5,ethX6
example:/config/port-ethX5..ethX6/#> bridge-group 1
example:/config/port-ethX5..ethX6/#> leave
note

Make sure you are not configuring the port that you are accessing the unit from in a transparent bridge as you will loose access to the unit.

Syntax​

[no] bridge-group [id]

Description

Set the id for the transparent bridge.

Options

OptionDescription
no

Disable the transparent bridge.

id

Use id (number) for the transparent bridge.

Status​

The current configured transparent bridge(s) can be observed with show port

example:/#> show port
[...]
ethX5            Down    100-T  ----------  No-Link         br-grp-1
ethX6            Down    100-T  ----------  No-Link         br-grp-1
[...]