Chapter 5

Advanced Configuration

Security > Storm Control

Security > Storm Control

Port  Displays the port number for which storm control is enabled.

Broadcast Control  Indicates whether broadcast packet types are forwarded on the specific interface.

Mode  Specifies the Broadcast mode currently enabled on the device. The possible field values are:

•• Unknown Unicast, Multicast & Broadcast  Counts Unicast, Multicast, and Broadcast traffic. This option is not available on the SRW224G4 and SRW248G4.

•• Multicast & Broadcast  Counts Broadcast and Multicast traffic together.

•• Broadcast Only  Counts only Broadcast traffic.

Rate Threshold  The maximum rate (packets per second) at which unknown packets are forwarded. The default value is 3500. The range is 70–100,000.

QoS

Network traffic is usually unpredictable, and the only basic assurance that can be offered is best effort traffic delivery. To overcome this challenge, Quality of Service (QoS) is applied throughout the network. This ensures that network traffic is prioritized according to specified criteria, and that specific traffic receives preferential treatment. QoS in the network optimizes network performance and entails two basic facilities:

Classifying incoming traffic into handling classes, based on an attribute, including:

•• The ingress interface

•• Packet content

•• A combination of these attributes

Providing various mechanisms for determining the allocation of network resources to different handling classes, including:

•• The assignment of network traffic to a particular hardware queue

•• The assignment of internal resources

•• Traffic shaping

The terms Class of Service (CoS) and QoS are used in the following context:

CoS provides varying Layer 2 traffic services. CoS refers to classification of traffic to traffic-classes, which are handled as an aggregate whole, with no per-flow settings. CoS is usually related to the 802.1p service that classifies flows according to their Layer 2 priority, as set in the VLAN header.

QoS refers to Layer 2 traffic and above. QoS handles per- flow settings, even within a single traffic class.

QoS > CoS Settings

The CoS Settings screen contains fields for enabling or disabling CoS. In addition, the Trust mode can be selected. The Trust mode relies on predefined fields within the packet to determine the egress queue settings.

QoS > CoS Settings

The CoS Settings screen has two areas, CoS Settings and CoS to Queue.

QoS Mode  Indicates if QoS is enabled on the interface. The possible values are:

•• Disable  Disables QoS on the interface.

•• Basic  Enables QoS on the interface.

•• Advanced  Enables Advanced mode QoS on the interface. This feature has been added to version

1.2of the SRW2024/SRW2016 and version 1.1 of the SRW224G4/SRW248G4.

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Linksys SRW2024, SRW248G4, SRW2048, SRW224G4, SRW2016 manual Security Storm Control, QoS CoS Settings
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SRW2016, SRW224G4, SRW2024, SRW2048, SRW248G4 specifications

The Linksys SRW2048 is a robust Layer 2 managed switch that caters to the networking needs of small to medium-sized businesses. Designed with performance and reliability in mind, it provides features that ensure optimal network efficiency and security.

One of the standout features of the SRW2048 is its 48 10/100/1000 Mbps Gigabit Ethernet ports, enabling high-speed data transfer and seamless connectivity for various devices within the network. This makes it ideal for environments with heavy data traffic, ensuring minimal latency and high performance.

The SRW2048 also supports advanced Layer 2 management features, including VLAN (Virtual Local Area Network) support, which allows users to segment the network into smaller, manageable sections. This is crucial for improving security and performance, as it reduces unnecessary traffic and potential broadcast storms. With a VLAN configuration, businesses can group users and devices based on function or department, ensuring efficient communication within teams.

In addition to VLAN capabilities, the Linksys SRW2048 incorporates Quality of Service (QoS) features. This technology prioritizes critical network traffic, such as voice over IP (VoIP) and video conferencing, ensuring that these applications receive the bandwidth they require for optimal performance. This is particularly beneficial for businesses that rely on real-time communication tools.

The switch also enhances security through features such as IEEE 802.1X port security, which ensures that only authorized users can access the network. The SRW2048 supports access control lists (ACLs), allowing administrators to set specific permissions for users and devices, further tightening security.

Linksys has also equipped the SRW2048 with a user-friendly web-based management interface, simplifying the process of configuring and monitoring network performance. This accessible interface allows IT personnel to quickly identify issues, manage traffic, and configure settings without extensive training.

Another notable characteristic of the Linksys SRW2048 is its robust build quality and reliability. With a metal chassis and fanless design, it maintains a low acoustic footprint and ensures passive cooling, making it suitable for office environments.

Overall, the Linksys SRW2048 is a feature-rich managed switch that combines advanced networking technologies, efficient performance, and security features to meet the diverse needs of modern businesses. Its scalability, manageability, and robust construction make it a valuable addition to any network infrastructure.
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