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Users Guide

ManualsBrandsDell ManualsAccess PlatformsC9010 Modular Chassis Switch
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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 dened 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.
Conguration Tasks for ARP
For a complete listing of all ARP-related commands, refer to the Dell Networking OS Command Line Reference Guide.
Conguration tasks for ARP include:
• Conguring Static ARP Entries (optional)
• Conguring ARP Inspection Trust
• Conguring ARP Retries
• Conguring the Timer for Resending Unresolved ARPs
• Enabling Proxy ARP (optional)
• Clearing ARP Cache (optional)
• ARP Learning via Gratuitous ARP
• ARP Learning via ARP Request
• Conguring ARP Retries
Conguring Static ARP Entries
ARP dynamically maps the MAC and IP addresses, and while most network host support dynamic mapping, you can congure an ARP
entry (called a static ARP) for the ARP cache.
To congure a static ARP entry, use the following command.
• Congure an IP address and MAC address mapping for an interface.
CONFIGURATION mode
arp ip-address mac-address interface
• ip-address: IP address in dotted decimal format (A.B.C.D).
• mac-address: MAC address in nnnn.nnnn.nnnn format.
• interface: enter the interface type.
• For the Management interface, enter the keyword ManagementEthernet then the slot/port information. The slot range is
from 0 to 1 and the port range is 0.
• For a Port Channel interface, enter the keywords portchannel then a number. The range is from 1 to 128.
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IPv4 Routing