Address Resolution Protocol configuration

Address Resolution Protocol (ARP) is the TCP/IP protocol that resides within the Internet layer. ARP resolves a physical address from an IP address. ARP queries machines on the local network for their physical addresses. ARP also maintains IP to physical address pairs in its cache memory. In any IP communication, the ARP cache is consulted to see if the IP address of the computer or the router is present in the ARP cache. Then the corresponding physical address is used to send a packet.

The following table describes the ARP Configuration commands.

Table 93 ARP Configuration commands

Command

Description

ip arp rearp <2-120>

Defines re-ARP period in minutes. You can set this duration between 2 and

 

120 minutes.

show ip arp

Displays the current ARP configurations.

 

Command mode: All except User EXEC

IGMP configuration

IGMP Snooping allows the switch to forward multicast traffic only to those ports that request it. IGMP Snooping prevents multicast traffic from being flooded to all ports. The switch learns which server hosts are interested in receiving multicast traffic, and forwards it only to ports connected to those servers.

IGMP snooping configuration

The following table describes the IGMP Snooping Configuration commands.

Table 94 IGMP Snooping commands

Command

Description

ip igmp snoop timeout <1-255>

Sets the Maximum Response Time (MRT) for IGMP hosts.

 

MRT is one of the parameters used to determine the age out

 

period of the IGMP hosts. Increasing the timeout increases the

 

age out period.

 

The range is from 1 to 255 seconds. The default is 10 seconds.

 

Command mode: Global configuration

ip igmp snoop mrouter-timeout <1-

600>

Configures the age-out period for the IGMP Mrouters in the Mrouter table. If the switch does not receive a General Query from the Mrouter for mrto seconds, the switch removes the multicast router from its Mrouter table.

The range is from 1 to 600 seconds. The default is 255 seconds.

Command mode: Global configuration

ip igmp snoop query-interval <1-600>

Sets the IGMP router query interval. The range is 1-600

 

seconds. The default value is 125.

 

Command mode: Global configuration

ip igmp snoop robust <2-10>

Configures the IGMP Robustness variable, which allows you to

 

tune the switch for expected packet loss on the subnet. If the

 

subnet is expected to be lossy (high rate of packet loss), then

 

increase the value. The default value is 2.

 

Command mode: Global configuration

[no] ip igmp snoop aggregate

Enables or disables IGMP Membership Report aggregation.

 

Command mode: Global configuration

ip igmp snoop source-ip <IP address>

Configures the source IP address used as a proxy for IGMP

 

Group Specific Queries.

 

Command mode: Global configuration

ip igmp snoop vlan <1-4095>

Adds the VLAN to IGMP Snooping.

 

Command mode: Global configuration

no ip igmp snoop vlan <1-4095>

Removes the VLAN from IGMP Snooping.

 

Command mode: Global configuration

no ip igmp snoop vlan all

Removes all VLANs from IGMP Snooping.

 

Command mode: Global configuration

Configuration Commands 84

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NEC N8406-022 manual Address Resolution Protocol configuration, Igmp configuration, Igmp snooping configuration

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.