TTL Hostname
1
10.11.199.190
2
gwegress-sjc-02.force10networks.com (10.11.30.126) 005.000 ms 001.000 ms
001.000 ms
3
fw-sjc-01.force10networks.com (10.11.127.254) 000.000 ms 000.000 ms 000.000 ms
4
www.dell.com (10.11.84.18) 000.000 ms 000.000 ms 000.000 ms
Dell#
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.
Configuration Tasks for ARP
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 Static ARP Entries
•
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.
Probe1
Probe2
001.000 ms 001.000 ms 002.000 ms
(optional)
(optional)
(optional)
Probe3
IPv4 Routing
554