Arp; Configuration Tasks For Arp; Configuring Static Arp Entries - Dell C9000 Series Networking Configuration Manual

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ARP

The system uses two forms of address resolution: address resolution protocol (ARP) and Proxy ARP.

ARP runs over Ethernet and enables endstations to learn the MAC addresses of neighbors on an IP network.

Over time, the system creates a forwarding table mapping the MAC addresses to their corresponding IP

address. This table is called the ARP Cache and dynamically learned addresses are removed after a defined

period of time.

For more information about ARP, refer to RFC 826, An Ethernet Address Resolution Protocol.

Proxy ARP enables hosts with knowledge of the network to accept and forward packets from hosts that

contain no knowledge of the network. Proxy ARP makes it possible for hosts to be ignorant of the network,

including subnetting.

For more information about Proxy ARP, refer to RFC 925, Multi-LAN Address Resolution, and RFC 1027, Using

ARP to Implement Transparent Subnet Gateways.

For a complete listing of all ARP-related commands, refer to the Dell Networking OS Command Line

Reference Guide.

Configuration tasks for ARP include:

Configuring ARP Inspection Trust

Configuring ARP Retries

Configuring the Timer for Resending Unresolved ARPs

Enabling Proxy ARP

Clearing ARP Cache

ARP Learning via Gratuitous ARP

ARP Learning via ARP Request

Configuring ARP Retries

Configuring Static ARP Entries

ARP dynamically maps the MAC and IP addresses, and while most network host support dynamic mapping,

you can configure an ARP entry (called a static ARP) for the ARP cache.

To configure a static ARP entry, use the following command.

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IPv4 Routing