Debugging options

The Miscellaneous Debug commands display trace buffer information about events that can be helpful in understanding switch operation. You can view the following information using Debug commands:

Events traced by the management processor (MP)

Events traced to a buffer area when a reset occurs

If the switch resets for any reason, the management processor (MP) trace buffer is saved into the snap trace buffer area. The output from these commands can be interpreted by NEC technical support.

The following table describes the Miscellaneous Debug commands:

Table 114 Miscellaneous Debug commands

Command

Usage

debug mp-trace

Displays the management processor trace buffer. Header information similar to the

 

following is shown:

 

MP trace buffer at 13:28:15 Fri May 25, 2002; mask: 0x2ffdf748

 

The buffer information is displayed after the header.

 

Command mode: All except User EXEC

debug mp-snap

Displays the management processor snap (or post-mortem) trace buffer. This buffer

 

contains information traced at the time that a reset occurred.

 

Command mode: All except User EXEC

clear flash-config

Deletes all flash configuration blocks. The next time the switch is rebooted, it returns to the

 

factory default settings.

 

Command mode: All except User EXEC

ARP cache maintenance

The following table describes the Address Resolution Protocol commands:

Table 115 ARP Maintenance commands

Command

Usage

show ip arp find <IP address>

Shows a single ARP entry by IP address.

 

Command mode: All except User EXEC

show ip arp interface <port number>

Shows ARP entries on a single port.

 

Command mode: All except User EXEC

show ip arp vlan <1-4095>

Shows ARP entries on a single VLAN.

 

Command mode: All except User EXEC

show ip arp reply

Shows the list of IP addresses that the switch will respond

 

to for ARP requests.

 

Command mode: All except User EXEC

show ip arp

Shows all ARP entries.

 

Command mode: All except User EXEC

clear ip arp-cache

Clears the entire ARP list from switch memory.

 

Command mode: All except User EXEC

 

 

 

NOTE: To display all ARP entries currently held in the switch, or a portion according to one of the commands listed above, see the “ARP information” section of the “Information Commands” chapter.

Maintenance Commands 97

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NEC N8406-022 manual Debugging options, ARP cache maintenance

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.