Dell Force10 S55T S55 Configuration Guide FTOS 8.3.5.3 - Page 329

16 IPv4 Addressing c e s IPv4 Addressing is supported on platforms FTOS supports various IP addressing features. This chapter explains the basics of Domain Name Service (DNS), Address Resolution Protocol (ARP), and routing principles and their implementation in FTOS. • IP Addresses on page 329 • Directed Broadcast on page 334 • Resolution of Host Names on page 334 • ARP on page 337 • ICMP on page 341 • on page 342 Table 16-1 lists the defaults for the IP addressing features described in this chapter. Table 16-1. IP Defaults IP Feature DNS Directed Broadcast Proxy ARP ICMP Unreachable ICMP Redirect Default Disabled Disabled Enabled Disabled Disabled IP Addresses FTOS supports IP version 4, as described in RFC 791. It also supports classful routing and Variable Length Subnet Masks (VLSM). With VLSM one network can be can configured with different masks. Supernetting, which increases the number of subnets, is also supported. Subnetting is when a mask is added 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 IPv4 Addressing | 329