Chapter 5: Configuring Ip; Overview; General Ip Features - Enterasys Security Router X-PeditionTM User Manual

Overview

This document describes the XSR's IP protocol suite functionality including:
• General IP features (ARP, ICMP, TCP, UDP, TFTP, Telnet, SSH, NAT, VRRP, Proxy DNS, et
al.)
• IP routing (RIP, OSPF, static routing, triggered-on-demand RIP updates)
• VLAN routing
• Applicable MIBs
• Configuration examples
IP protocol, the main protocol of the TCP/IP suite, interconnects systems of packet-switched
computer communication networks. It transmits TCP, UDP, and ICMP information as IP
datagrams in a 32-bit addressing scheme where an IP address is represented by four fields, each
containing 8-bit numbers. IP uses three types and five classes of addresses:
• Unicast - destined for a single host
• Broadcast - destined for all hosts on a given network
• Multicast - destined for a set of hosts belonging to a multicast group
• Class A, B, and C - used as a pool for unicast addresses
• Class D - used for multicast addresses
• Class E - reserved for future use

General IP Features

The following features are supported on the XSR:
• Meets requirements for IPv4 routers - RFC-1812
• Ethernet 802.3 support of SNAP and DIX frame format
• Internet Standard Subnetting Procedure (ISSP) - RFC-950
• ARP - dynamic, static, and proxy ARP
• Proxy DNS
• IP subnet zero (always enabled)
Configuring IP
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