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10
Advanced IP
Protocol Features
This chapter describes various advanced IP features supported in OPNET. We start
the chapter by describing available OPNET options for conguring Network Address
Translation (NAT), followed by IP multicasting and IPv6. We conclude the chapter
by providing a detailed description of QoS mechanisms modeled in OPNET.
10.1 NETWORK ADDRESS TRANSLATION (NAT)
10.1.1 OvErvIEw OF nat
Network Address Translation (NAT) is a mechanism for mapping private IP addresses
(e.g., 10.0.0.0/8, 169.254.0.0/16, 172.16.0.0/11, and 192.168.0.0/16) into globally unique
addresses. With the help of NAT, all hosts in a domain with a li ...