Spanning Tree Algorithm Configuration

CLI – This command displays global STA settings, followed by settings for each port.

Console#show spanning-tree

4-135

Spanning-tree information

---------------------------------------------------------------

Spanning tree mode

:RSTP

Spanning tree enable/disable

:enable

Priority

 

:32768

Bridge Hello

Time (sec.)

:2

Bridge Max Age (sec.)

:20

Bridge Forward Delay (sec.)

:15

Root Hello Time (sec.)

:2

Root Max Age

(sec.)

:20

Root Forward

Delay (sec.)

:15

Designated Root

:32768.000087654321

Current root

port

:1

Current root

cost

:200000

Number of topology changes

:1

Last topology changes time (sec.):23771

Transmission

limit

:3

Path Cost Method

:long

.

.

.

Note: The current root port and current root cost display as zero when this device is not connected to the network.

Configuring Global Settings

Global settings apply to the entire switch.

Command Usage

Spanning Tree Protocol

Uses RSTP for the internal state machine, but sends only 802.1D BPDUs. Rapid Spanning Tree Protocol

RSTP supports connections to either STP or RSTP nodes by monitoring the incoming protocol messages and dynamically adjusting the type of protocol messages the RSTP node transmits, as described below:

-STP Mode – If the switch receives an 802.1D BPDU (i.e., STP BPDU) after a port’s migration delay timer expires, the switch assumes it is connected to an 802.1D bridge and starts using only 802.1D BPDUs.

-RSTP Mode – If RSTP is using 802.1D BPDUs on a port and receives an RSTP BPDU after the migration delay expires, RSTP restarts the migration delay timer and begins using RSTP BPDUs on that port.

Command Attributes

Basic Configuration of Global Settings

Spanning Tree State – Enables/disables STA on this switch. (Default: Enabled)

Spanning Tree Type – Specifies the type of spanning tree used on this switch:

-STP: Spanning Tree Protocol (IEEE 802.1D); i.e., when this option is selected, the switch will use RSTP set to STP forced compatibility mode).

-RSTP: Rapid Spanning Tree (IEEE 802.1w); RSTP is the default.

3-79

Page 109
Image 109
Accton Technology VS4512DC manual Configuring Global Settings, 135

VS4512DC, VS4512 specifications

Accton Technology is renowned for its innovative networking solutions and has made significant strides in the realm of networking devices with its VS4512 and VS4512DC models. These devices cater primarily to the advanced needs of enterprise and data center environments, providing robust features and cutting-edge technologies that enhance network performance and reliability.

The Accton VS4512 is a high-performance Layer 2+ switch designed for top-of-rack applications in data centers. It boasts a compact 1U design, making it highly efficient for space-constrained environments. One of its standout features is the support for Ethernet Flow Control, which significantly reduces data loss during peak traffic loads. This is essential for businesses that rely on real-time data processing and streaming.

In terms of scalability, the VS4512 supports up to 48 Gigabit Ethernet ports, which can be expanded using four 10 Gigabit SFP+ uplink ports. This flexibility allows enterprises to customize their network architecture to meet their growing demands, whether they are scaling up for more users or enhancing service capabilities.

The VS4512DC, on the other hand, is the DC version tailored for data centers. It offers similar features as the VS4512 but includes enhancements for power efficiency and redundancy, ensuring that operations can continue smoothly even in power outage scenarios. The VS4512DC features dual power supplies and advanced thermal management, allowing for improved heat dissipation and lower operational costs.

Both models support advanced Layer 3 routing capabilities, enabling efficient traffic management across complex networks. They also incorporate features like VLAN segmentation and link aggregation, which facilitate better bandwidth utilization and improved network security.

Security is another cornerstone of these switches, with features such as DHCP snooping, port security, and storm control to mitigate risks associated with unauthorized access and network congestion.

In summary, the Accton Technology VS4512 and VS4512DC switches represent significant advancements in networking technology, equipped with a comprehensive set of features tailored for modern enterprise needs. With their scalability, robust performance, and focus on security, these switches are positioned to meet the challenges of today's fast-paced digital environments, making them a preferred choice for organizations aiming to enhance their network infrastructure.