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Blade ICE G8124-E manual Fast Uplink Convergence, Port Priority, Port Path Cost

Models: G8124-E G8124

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BLADEOS 6.5.2 Application Guide

Port Priority

The port priority helps determine which bridge port becomes the root port or the designated port. The case for the root port is when two switches are connected using a minimum of two links with the same path-cost. The case for the designated port is in a network topology that has multiple bridge ports with the same path-cost connected to a single segment, the port with the lowest port priority becomes the designated port for the segment. Use the following command to configure the port priority:

RS G8124(config)# spanning-tree stp <STG> priority <priority value>

Note – where priority value is a number from 0 to 255.For RSTP, MSTP, and PVRST modes, port priority must be specified in increments of 16.

Port Path Cost

The port path cost assigns lower values to high-bandwidth ports, such as 10 Gigabit Ethernet, to encourage their use. The objective is to use the fastest links so that the route with the lowest cost is chosen. A value of 0 (the default) indicates that the default cost will be computed for an auto-negotiated link or trunk speed.

Use the following command to modify the port path cost:

RS G8124(config)# interface port <port number>

RS G8124(config-if)# spanning-tree stp <STG> path-cost<path cost value> RS G8124(config-if)# exit

The port path cost varies, depending on Spanning Tree mode, as follows:

￿STP/PVST+: 1-65535

￿RSTP/PVRST/MSTP: 1-200000000 (0 = automatic path cost)

Fast Uplink Convergence

Fast Uplink Convergence enables the G8124 to quickly recover from the failure of the primary link or trunk group in a Layer 2 network using STP/PVST+ mode. Normal recovery can take as long as 50 seconds, while the backup link transitions from Blocking to Listening to Learning and then Forwarding states. With Fast Uplink Convergence enabled, the G8124 immediately places the secondary path into Forwarding state, and multicasts the addresses in the forwarding database (FDB) and ARP table over the secondary link so that upstream switches can learn the new path.

Note – In order for Fast Uplink Convergence to be functional, the switch must be running in STP/PVST mode and must be linked to switches running STP, PVST, or PVST+.

BMD00220, October 2010

Chapter 8: Spanning Tree Protocols ￿ 113

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Blade ICE G8124-E manual Fast Uplink Convergence, Port Priority, Port Path Cost
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G8124-E, G8124 specifications

The Blade ICE G8124 is a cutting-edge networking solution designed for high-performance data center environments. It has emerged as a popular choice among organizations that require reliable and efficient network infrastructure to support their growing demands for bandwidth and low-latency connectivity.

One of the key features of the Blade ICE G8124 is its high port density. This networking device typically offers 24 ports of 10 Gigabit Ethernet, ensuring that businesses can connect numerous devices without requiring extensive physical space. The design is also scalable, accommodating future expansion as organizational needs grow.

Another significant aspect of the G8124 is its advanced switching capabilities. It utilizes a non-blocking architecture, enabling simultaneous data transmissions on all ports. This characteristic ensures that there is no bottleneck in the network traffic, providing the high performance needed in data-intensive applications.

The G8124 incorporates various technologies to enhance its functionalities. It supports Layer 2 and Layer 3 switching, making it versatile for different networking needs. Additionally, it features comprehensive Quality of Service (QoS) settings that prioritize critical applications, such as VoIP and video streaming, ensuring smooth operation even under heavy loads.

In terms of security, the Blade ICE G8124 provides robust measures to protect the network. It supports features such as Access Control Lists (ACLs), port security, and VLANs, allowing administrators to segment the network and restrict unauthorized access. These security capabilities are vital in today’s landscape, where cyber threats are increasingly common.

Moreover, the G8124 offers excellent management features. It includes an intuitive user interface for easy configuration and monitoring of network performance. SNMP support allows integration with network management systems, providing administrators with insights needed to optimize their operations.

Power efficiency is also a hallmark of the Blade ICE G8124. It employs energy-saving technologies that reduce operational costs, an essential factor for environmentally-conscious organizations striving to minimize their carbon footprint.

In summary, the Blade ICE G8124 stands out with its high port density, advanced switching capabilities, robust security features, and efficient management options. This networking solution is designed to meet the demands of modern data centers, providing the performance, reliability, and scalability that organizations require. With its innovative technologies, the G8124 ensures that businesses can navigate the complexities of today's networking landscape effectively.