Administrator Guide

IPv4 Routing
IPv4 routing and various IP addressing features are supported. This chapter describes the basics of domain name service (DNS),
address resolution protocol (ARP), and routing principles and their implementation in the Dell Networking OS.
IP Feature Default
DNS Disabled
Directed
Broadcast
Disabled
Proxy ARP Enabled
ICMP
Unreachable
Disabled
ICMP Redirect Disabled
Topics:
• IP Addresses
• Configuration Tasks for IP Addresses
• Assigning IP Addresses to an Interface
• Configuring Static Routes
• Configure Static Routes for the Management Interface
• Enabling Directed Broadcast
• Resolution of Host Names
• Enabling Dynamic Resolution of Host Names
• Specifying the Local System Domain and a List of Domains
• Configuring DNS with Traceroute
• ARP
• ICMP
• ICMP Redirects
IP Addresses
The Dell Networking OS supports IP version 4 (as described in RFC 791), 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
You can configure any IP address as a static route except IP addresses already assigned to interfaces.
NOTE:
31-bit subnet masks (/31, or 255.255.255.254), as defined by RFC 3021, are supported. This feature allows you to
save two more IP addresses on point-to-point links than 30-bit masks. The system also supports RFC 3021 with ARP.
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