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In-Line Installation: Difference between revisions
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== General == | == General == | ||
=== DISCLAIMER === | |||
Allegro recommends a separate tap, a packet broker or mirror port for productive network links. Please use the '''In-Line''' only if the failure of a link does '''not''' cause problem. | |||
=== What is the '''In-Line''' mode === | === What is the '''In-Line''' mode === | ||
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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. | 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 === | === 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 Allegro can be installed between 2 network devices. As an example, the Allegro can be installed between a switch and an access point. | ||
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All Allegros with network card extension slots support the '''In-Line Mode''' by default. All extension cards have either '''2''' or '''4''' network ports. Each card forms '''1''' or '''2''' brides. On extension cards with '''4''' ports, the two left and the two right port as the bride pair. | All Allegros with network card extension slots support the '''In-Line Mode''' by default. All extension cards have either '''2''' or '''4''' network ports. Each card forms '''1''' or '''2''' brides. On extension cards with '''4''' ports, the two left and the two right port as the bride pair. | ||
=== Bypass cards === | === Bypass extension cards === | ||
The bypass cards for the Allegro Network Multimeter deliver a | The bypass cards for the Allegro Network Multimeter deliver a fail-over when the software bypass is not active. The bypass will be enabled when the bridge mode is active when the Allegro Firmware is not running due power off, firmware upgrade process or most situations of software or hardware failure. | ||
== Limitations == | == Limitations == | ||
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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 1GBit/s switch port and a 100 MBit/s VoIP telephone will lead by default to a speed mismatch. The Allegro will show a warning of there is a speed mismatch. | 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 1GBit/s switch port and a 100 MBit/s VoIP telephone will lead by default to a speed mismatch. The Allegro will show a warning of there is a speed mismatch. | ||
You can check if there is a mismatch at '''Interface Stats'''. | |||
[[File:Interface speed mismatch.png|200px]] | |||
=== Forwarding === | === Forwarding === | ||