Configuration manual

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

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.

NOTE: The Dell Networking OS versions 7.7.1.0 and later support 31-bit subnet masks (/31, or

255.255.255.254) as defined by RFC 3021. This feature allows you to save two more IP addresses on

point-to-point links than 30-bit masks. The system supports RFC 3021 with ARP.

Configuration Tasks for IP Addresses

The following describes the tasks associated with IP address configuration.

Configuration tasks for IP addresses includes:

• Assigning IP Addresses to an Interface (mandatory)

IPv4 Routing

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