In-Line Installation

This section describes the In-Line installation of the Allegro Network Multimeter.

General

What is the In-Line mode

The In-Line Mode allows the Allegro to work as a transparent bridge. Pairs of network ports form a group where all received traffic is forwarded immediately to the other port of the pair. It is the default configuration of the Allegro Network Multimeter that 2 port pairs build a transparent bridge.

How should the In-Line mode be used

The Allegro can be installed between 2 network devices. As an example, the Allegro can be installed between a switch and an access point. The In-Line Mode is designed for links where the downtime of a link is not critical and where a delay and jitter of a few microseconds is acceptable. See #Limitations for more details.

Where can I configure the In-Line Mode

The

Interfaces

All physical Allegro Network Multimeter have at least 2 network interfaces. By default, they are set up that each port pair forms a network bridge. Each Allegro Network Multimeter forms a number

Device

Bridge Pairs

Limitations

Link Setup

The Allegro negotiates every port of a bridge pair independently. This can lead to a link speed mismatch. As an example, an installation between a Gigabit switch and a 100MBit/s VoIP telephone will lead by default to a speed mismatch. The Allegro will show a warning

Forwarding

The traffic forwarding is done in software.