Maintenance Commands, System maintenance | NEC N8406-022 instruction

Maintenance Commands

Introduction

The Maintenance commands are used for debugging purposes, enabling you to generate a technical support dump of the critical state information in the switch, and to clear entries in the Forwarding Database and the Address Resolution Protocol (ARP) and routing tables. These commands are available only from an administrator login.

Dump information contains internal switch state data that is written to flash memory on the switch after any one of the following occurs:

•The switch administrator forces a switch panic. The panic option causes the switch to dump state information to flash memory, and then causes the switch to reboot.

•The switch administrator enters the switch reset key combination (Ctrl-Shift-6) on a device that is attached to the console port.

•The switch detects a hardware or software problem that requires a reboot.

The following sections provide detailed information and commands.

System maintenance

The System Maintenance commands are reserved for use by NEC technical support. The options are used to perform system debugging.

The following table describes the System Maintenance commands.

Table 112 System Maintenance commands

Command	Usage
debug debug-flags	Sets the flags that are used for debugging purposes by NEC technical support.
	Command mode: All except User EXEC

Forwarding Database maintenance

The Forwarding Database (FDB) Manipulation commands can be used to view information and to delete a MAC address from the Forwarding Database or clear the entire Forwarding Database. This is helpful in identifying problems associated with MAC address learning and packet forwarding decisions.

The following table describes the FDB Manipulation commands.

Table 113 FDB Manipulation commands

Command	Usage
show mac-address-table	Displays a single database entry by its MAC address. You are prompted
address {<MAC address>}	to enter the MAC address of the device. Enter the MAC address using
	one of the following:
	• xx:xx:xx:xx:xx:xx format (for example: 08:00:20:12:34:56)
	• xxxxxxxxxxxx format (for example: 080020123456).
	Command mode: All except User EXEC
show mac-address-table port	Displays all FDB entries for a particular port.
{<port number>}	Command mode: All except User EXEC
show mac-address-table vlan	Displays all FDB entries on a single VLAN.
{<1-4095>}	Command mode: All except User EXEC
show mac-address-table	Displays all entries in the Forwarding Database.
	Command mode: All except User EXEC
clear mac-address-table	Clears the entire Forwarding Database from switch memory, then adds
	the static entries to the Forwarding Database.
	Command mode: All except User EXEC

Maintenance Commands 96

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.