Spanning Tree information

The following command displays Spanning Tree information:

show spanning-tree stp <1-32>information

Command mode: All

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upfast disabled, update 40

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Spanning Tree Group 1: On (STP/PVST+)

VLANs: 1

Current Root:			Path-Cost		Port	Hello MaxAge FwdDel			Aging
8000 00:02:a5:d1:0f:ed			8		20	2	20	15	180
Parameters: Priority Hello MaxAge FwdDel Aging
		32768	2	20	15		180
Port	Priority	Cost	FastFwd		State		Designated Bridge		Des Port
----	--------	----	--------		----------		--------------------- -------
1	0	0	n		FORWARDING *
2	0	0	n		FORWARDING *
3	0	0	n		FORWARDING *

The switch software uses the IEEE 802.1d Spanning Tree Protocol (STP). If RSTP/MSTP is turned on, see the “Rapid Spanning Tree information” section for Spanning Tree Group information. In addition to seeing if STP is enabled or disabled, you can view the following STP bridge information:

•Status of Uplink Fast (upfast)

•Current root MAC address

•Path cost

•Port

•Hello interval

•Maximum age value

•Forwarding delay

•Aging time

You can also refer to the following port-specific STP information:

•Port number and priority

•Cost

•State

•Port Fast Forwarding state

•Designated bridge

•Designated port

The following table describes the STP parameters.

Table 19 STP parameters

Parameter	Description
Current Root	Shows information about the root bridge for the Spanning Tree. Information includes the
	priority (hex) and MAC address of the root.
Path-Cost	Path-cost is the total path cost to the root bridge. It is the summation of the path cost
	between bridges (up to the root bridge).
Port	The current root port refers to the port on the switch that receives data from the current root.
	Zero (0) indicates the root bridge of the STP.
Priority	The bridge priority parameter controls which bridge on the network will become the STP root
(bridge)	bridge.
Hello	The hello time parameter specifies, in seconds, how often the root bridge transmits a
	configuration bridge protocol data unit (BPDU). Any bridge that is not the root bridge uses
	the root bridge hello value.
MaxAge	The maximum age parameter specifies, in seconds, the maximum time the bridge waits
	without receiving a configuration bridge protocol data unit before it reconfigures the STP
	network.

Information Commands 26

N8406-022 specifications

The NEC N8406-022 is a robust and versatile networking device designed primarily for organizations requiring high-performance connectivity solutions. As part of NEC's extensive portfolio of networking equipment, the N8406-022 is engineered to address the demands of modern enterprise environments, ensuring seamless communication and data processing capabilities.

One of the key features of the N8406-022 is its multi-layer switching functionality. This device supports Layer 2 and Layer 3 switching, allowing for efficient data routing and reducing latency within local area networks (LANs). This capability is particularly beneficial for businesses that rely on real-time data access and transfer, such as those in financial services, media, and telecommunications.

The N8406-022 is equipped with advanced Quality of Service (QoS) features that help prioritize critical network traffic. This means that voice and video data packets can be given precedence over less time-sensitive information, ensuring that essential communication remains clear and uninterrupted. This is crucial for organizations leveraging VoIP and video conferencing solutions.

In terms of connectivity, the NEC N8406-022 offers a variety of ports, including multiple Gigabit Ethernet ports, which facilitate high-speed data transfer and enable seamless integration into existing network infrastructures. The device may also include 10 Gigabit SFP+ ports, providing the flexibility for high-capacity uplinks to support bandwidth-intensive applications and storage solutions.

Security is another focal point of the NEC N8406-022, with integrated features such as VLAN support, access control lists (ACLs), and port security measures. These capabilities protect sensitive data from unauthorized access and ensure that only legitimate users and devices can connect to the network.

Moreover, the N8406-022 often incorporates advanced energy-efficient technologies that minimize power consumption without compromising performance. This not only contributes to operational cost savings but also supports organizations in their sustainability efforts.

With its combination of performance, security, and energy efficiency, the NEC N8406-022 stands out as a reliable networking solution suitable for a wide range of enterprises looking to enhance their connectivity and operational efficiency. Whether deployed in data centers or as part of a corporate network, this device is built to meet the evolving demands of today’s digital landscape.