Layer 2 Switching

53

 

Table 10: Parameters in the output of the SHOW STP command

 

 

 

 

Parameter

Meaning

 

 

 

 

Forward Delay

The time ports spend in the Listening state and Learning

 

 

state before moving to the Learning or Forwarding state

 

 

respectively. Also the value used for the ageing timer for the

 

 

dynamic entries in the Forwarding Database while received

 

 

Configuration Messages indicate a topology change.

 

 

 

 

Switch Max Age

The value of the Max Age parameter when this switch is the

 

 

Root or is attempting to become the Root. This parameter

 

 

is set by the MAXAGE parameter in the SET STP command.

 

 

 

 

Switch Hello Time

The value of the Hello Time parameter when this switch is

 

 

the Root or is attempting to become the Root. This

 

 

parameter is set by the HELLOTIME parameter in the SET

 

 

STP command.

 

 

 

 

Switch Forward Delay

The value of the Forward Delay parameter when this switch

 

 

is the Root or is attempting to become the Root. This

 

 

parameter is set by the FORWARDDELAY parameter in the

 

 

SET STP command.

 

 

 

 

Hold Time

The minimum time in seconds between the transmission of

 

 

configuration BPDUs through a given LAN Port. The value

 

 

of this fixed parameter is 1, as specified in IEEE Std 802.1D.

 

 

 

Each port has a port priority, with a default value of 128, used to determine which port should be the root port for the STP if two ports are connected in a loop. The lower number indicates the higher priority.

SET STP PORT={port-listALL} PORTPRIORITY=0..255 [other-

parameters...]

The PORTPRIORITY parameter sets the value of the priority field contained in the port identifier. The Spanning Tree Algorithm uses the port priority when determining the root port for each switch. The port with the lowest value is considered to have the highest priority. The default value is 128. Each STP has its own independent PORTPRIORITY parameter for each member port.

Each port also has a path cost, which is used if the port is the root port for the STP on the switch. The path cost is added to the root path cost field in configuration messages received on the port to determine the total cost of the path to the root bridge. The default PATHCOST values depend on the port speed, according to the formula:

PATHCOST = 1000 / Port_Speed_in_MB_per_second

so that a port operating at 10Mbps has a default pathcost of 100, a port operating at 100 Mbps has a default pathcost of 10, and a port operating at 1 Gbps has a default pathcost of 1. Setting the pathcost to a larger value on a particular port is likely to reduce the traffic over the LAN connected to it. This may be appropriate if the LAN has lower bandwidth, or if there are reasons for limiting the traffic across it. To modify the STP port pathcost, use the command:

SET STP PORT={port-listALL} PATHCOST=1..1000000

If the PATHCOST of a port has not been explicitly set by the user, or the default values have been restored to the port, then the default PATHCOST for the port will vary as the speed of the port varies.

The default value for PATHCOST is set according to the speed. For a port operating at 100 Mbps, the default value is 19. For a port operating at 10 Mbps, the default value is 100.

Rapier Switch Software Release 2.2.1 C613-02013-00 Rev A

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Allied Telesis C613-02013-00 manual Parameters
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C613-02013-00 specifications

The Allied Telesis C613-02013-00 is a versatile and powerful network switch designed to meet the demands of modern networking environments. This device is part of Allied Telesis's extensive range of networking solutions, catering to both enterprise and industrial applications. It is engineered for high performance, reliability, and ease of management, making it a suitable choice for organizations that require robust connectivity solutions.

One of the main features of the C613-02013-00 is its support for advanced Layer 2 switching capabilities. This provides businesses with the necessary tools to manage and direct network traffic efficiently. The switch includes support for VLAN (Virtual Local Area Network) technology, which allows for the segmentation of network traffic, enhancing both security and performance. With VLANs, organizations can isolate critical workloads and improve network management while ensuring that sensitive information is protected from unauthorized access.

Another key characteristic of the C613-02013-00 is its extensive support for Power over Ethernet (PoE). This feature enables the switch to deliver electrical power along with data over standard Ethernet cabling. This is particularly beneficial for powering devices such as IP cameras, wireless access points, and VoIP phones, reducing the need for additional power supply infrastructure. With PoE capabilities, the switch simplifies installation and enhances flexibility in deploying network devices.

The C613-02013-00 also boasts advanced network management features, including support for SNMP (Simple Network Management Protocol) for efficient monitoring and troubleshooting. This ensures that network administrators can maintain optimal performance and quickly address any issues that arise. Additionally, the switch supports network redundancy features like Rapid Spanning Tree Protocol (RSTP), which helps to prevent network loops and minimizes downtime.

In terms of physical characteristics, the C613-02013-00 is designed for durability and ease of deployment in various environments. Its compact form factor allows for effective space utilization in data centers and network closets. Moreover, it features a fanless design, making it suitable for deployment in noise-sensitive environments such as offices and classrooms.

In summary, the Allied Telesis C613-02013-00 is a robust network switch offering advanced features such as Layer 2 switching, PoE support, and comprehensive network management capabilities. Its design and performance make it an excellent choice for businesses seeking to enhance their network infrastructure with reliable and secure connectivity solutions.
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