Chapter 5

Configuring the Switch

Activate Protocol Migration Test  If at any time the switch detects STP BPDUs, including Configuration or Topology Change Notification BPDUs, it will automatically set the selected interface to forced STP-compatible mode.. However, you can also use the Protocol Migration button to manually re-check the appropriate BPDU format (RSTP or STP-compatible) to send on the selected interfaces.. (Default: Disabled)

Administrative Link Type  The link type attached to this interface..

•Point-to-Point A connection to exactly one other bridge..

•Shared  A connection to two or more bridges..

•Auto  The Switch automatically determines if the interface is attached to a point-to-point link or to shared media.. This is the default setting..

Spanning Tree > MSTP Properties

Spanning Tree > MSTP Properties

When using STP or RSTP, it may be difficult to maintain a stable path between all VLAN members.. Frequent changes in the tree structure can easily isolate some of the group members.. MSTP (which is based on RSTP for fast convergence) is designed to support independent spanning trees based on VLAN groups.. Using multiple spanning trees can provide multiple forwarding paths and enable load balancing.. One or more VLANs can be grouped into a Multiple Spanning Tree Instance (MSTI) This Switch supports 33 MSTI’s.. MSTP builds a separate Multiple Spanning Tree (MST) for each instance to maintain connectivity among each of the assigned VLAN groups.. MSTP then builds a Internal Spanning Tree (IST) for the Region containing all commonly configured MSTP bridges..

An MST Region consists of a group of interconnected bridges that have the same MST Configuration Identifiers (including the Region Name, Revision Level and Configuration Digest).. An MST Region may contain multiple MSTP Instances.. An Internal Spanning Tree (IST) is used to connect all the MSTP switches within an MST region.. A Common Spanning Tree (CST) interconnects all adjacent MST Regions, and acts as a virtual bridge node for communications with STP or RSTP nodes in the global network..

MSTP connects all bridges and LAN segments with a single Common and Internal Spanning Tree (CIST).. The CIST is formed as a result of the running spanning tree algorithm between switches that support the STP, RSTP, MSTP protocols..

Region Name  The name for this MSTI.. (Maximum length: 32 characters)

Revision  The revision for this MSTI.. (Range: 0-65535;

Default: 0)

Max Hops  The maximum number of hops allowed in the MST region before a BPDU is discarded.. (Range: 1-40; Default: 20)

IST Master  An MD5 signature key that contains the VLAN ID to MST ID mapping table.. In other words, this key is a mapping of all VLANs to the CIST..

Modify the required attributes for MSTP.. Click Save Settings to save the changes..

Spanning Tree > MSTP Instance Settings

QoS > MSTP Instance Settings

MST ID  Instance identifier to configure.. (Range: 0-4094;

Default: 0)

48-Port 10/100 + 4-Port Gigabit Switch with WebView and Power over Ethernet

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Cisco Systems SRW248G4P manual Spanning Tree Mstp Properties, Spanning Tree Mstp Instance Settings
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SRW248G4P specifications

Cisco Systems SRW248G4P is a high-performance Layer 2 switch designed specifically for small to medium-sized businesses that require robust networking solutions. This switch supports Power over Ethernet (PoE), providing a highly flexible option for powering devices such as IP phones, wireless access points, and surveillance cameras.

One of the standout features of the SRW248G4P is its 48 10/100 Ethernet ports, which ensure ample connectivity for various networked devices. Additionally, it offers four Gigabit Ethernet uplink ports, allowing for seamless integration with existing network infrastructure and facilitating high-speed data transfer. The combination of these ports enables businesses to expand their network capabilities as needed without the immediate requirement for added devices.

The SRW248G4P comes equipped with advanced Layer 2 switching capabilities, including VLAN support, which enables the segmentation of network traffic for improved performance and security. It also supports Spanning Tree Protocol (STP) and Rapid Spanning Tree Protocol (RSTP), which help prevent network loops and ensure redundancy. With features like Link Aggregation Control Protocol (LACP), multiple physical connections can be combined into a single logical link, enhancing bandwidth and providing failover capabilities.

Another critical attribute of the Cisco SRW248G4P is its user-friendly management interface. The switch can be managed through a web-based interface, allowing IT administrators to configure settings, monitor performance, and troubleshoot issues with ease. Additionally, it supports SNMP (Simple Network Management Protocol) for integration with network management systems, further simplifying monitoring tasks.

Power over Ethernet functionality is a significant advantage of the SRW248G4P, providing up to 15.4 watts per port. This capability simplifies installation and reduces the clutter of power cords and outlets. Organizations can deploy PoE-enabled devices in locations that lack power sources, thus enhancing overall flexibility in network design.

In summary, the Cisco Systems SRW248G4P is a feature-rich switch tailored for small to medium-sized enterprises. Its blend of performance, management capabilities, and advanced features like PoE makes it a valuable asset in any organization's networking setup. By ensuring reliable connectivity and ease of management, businesses can focus more on growth and their core objectives rather than worrying about network complexities.
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