Quantamesh Qnos5 Features; Switching Features Introduction; Vlan Support; Double Vlans - Quanta Cloud Technology QuantaMesh QNOS5 Configuration Manual

1. QuantaMesh QNOS5 Features

This section provides a brief overview of the supported QNOS features. The features are categorized as
follows:

1.1. Switching Features Introduction

1.1.1. VLAN Support

VLANs are collections of switching ports that comprise a single broadcast domain. Packets are classified as
belonging to a VLAN based on either the VLAN tag or a combination of the ingress port and packet contents.
Packets sharing common attributes can be groups in the same VLAN. QNOS software is in full compliance
with IEEE 802.1Q VLAN tagging.

1.1.2. Double VLANs

The Double VLAN feature (IEEE 802.1QinQ) allows the use of a second tag on network traffic. The additional
tag helps differentiate between customers in the Metropolitan Area Networks (MAN) while preserving
individual customer's VLAN identification when they enter their own 802.1Q domain.

1.1.3. Switching Modes

The switchport mode feature helps to minimize the potential for configuration errors. The feature also
makes VLAN configuration easier by reducing the amount of commands needed for port configuration. For
example, to configure a port connected to an end user, the administrator can configure the port in Access
mode. Ports connected to other switches can be configured in Trunk mode. VLAN assignments and tagging
behavior are automatically configured as appropriate for the connection type.

1.1.4. Spanning Tree Protocols (STP)

Spanning Tree Protocol (IEEE 802.1D) is a standard requirement of Layer 2 switches that allows bridges to
automatically prevent and resolve L2 forwarding loops. The STP feature supports a variety of per-port
settings including path cost, priority settings, Port Fast mode, STP Root Guard, Loop Guard, TCN Guard, and
Auto Edge. These settings are also configurable per-Port-channel.

1.1.5. Rapid Spanning Tree

Rapid Spanning Tree Protocol (RSTP) detects and uses network topologies to enable faster spanning tree
convergence after a topology change, without creating forwarding loops. The port settings supported by
STP are also supported by RSTP.

1.1.6. Multiple Spanning Tree

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