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IPv4 Routing
The Dell Networking OS supports various IP addressing features.
This chapter describes the basics of domain name service (DNS), address resolution protocol (ARP), and routing principles and
their implementation in the Dell Networking operating system (OS).
IP Feature Default
DNS Disabled
Directed
Broadcast
Disabled
Proxy ARP Enabled
ICMP
Unreachable
Disabled
ICMP Redirect Disabled
Topics:
IP Addresses
IPv4 Path MTU Discovery Overview
Using the Configured Source IP Address in ICMP Messages
Configuring the Duration to Establish a TCP Connection
Enabling Directed Broadcast
Resolution of Host Names
ARP
ARP Learning via Gratuitous ARP
ARP Learning via ARP Request
Configuring ARP Retries
ICMP
ICMP Redirects
UDP Helper
Configurations Using UDP Helper
Troubleshooting UDP Helper
IP Addresses
The Dell Networking OS supports IP version 4, as described in RFC 791. It also supports classful routing and variable length
subnet masks (VLSM).
With VLSM, you can configure one network with different masks. Supernetting, which increases the number of subnets, is also
supported. To subnet, you add a mask to the IP address to separate the network and host portions of the IP address.
At its most basic level, an IP address is 32-bits composed of network and host portions and represented in dotted decimal
format. For example, 00001010110101100101011110000011 is represented as 10.214.87.131.
For more information about IP addressing, refer to RFC 791, Internet Protocol.
Implementation Information
In the Dell Networking OS, you can configure any IP address as a static route except IP addresses already assigned to
interfaces.
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