OmniSwitch 6800/6850/9000 Network Configuration Guide March 2008 page 18-1
18 Configuring IP
Internet Protocol (IP) is primarily a network-layer (Layer 3) protocol that contains addressing and control
information that enables packets to be forwarded. Along with Transmission Control Protocol (TCP), IP
represents the heart of the Internet protocols. IP has two primary responsibilities, providing connection-
less, best-effort delivery of datagrams through an internetwork; and providing fragmentation and reassem-
bly of datagrams to support data links with different Maximum Transmission Unit (MTU) sizes.
Note. IP routing (Layer 3) can be accomplished using static routes or by using one of the IP routing proto-
cols, Routing Information Protocol (RIP) and Open Shortest Path First (OSPF). For more information on
these protocols see Chapter 20, “Configuring RIP,” in this manual; or “Configuring OSPF” in the
OmniSwitch 6800/6850/9000 Advanced Routing Configuration Guide.
There are two versions of Internet Protocol supported, IPv4 and IPv6. For more information about using
IPv6, see Chapter 19, “Configuring IPv6.”
In This Chapter
This chapter describes IP and how to configure it through the Command Line Interface (CLI). It includes
instructions for enabling IP forwarding, configuring IP route maps, as well as basic IP configuration
commands (e.g., ip default-ttl). CLI commands are used in the configuration examples; for more details
about the syntax of commands, see the OmniSwitch CLI Reference Guide. This chapter provides an over-
view of IP and includes information about the following procedures:
• IP Forwarding
– Configuring an IP Router Interface (see page 18-8)
– Creating a Static Route (see page 18-11)
– Creating a Default Route (see page 18-12)
– Configuring Address Resolution Protocol (ARP) (see page 18-12)
• IP Configuration
– Configuring the Router Primary Address (see page 18-15)
– Configuring the Router ID (see page 18-15)
– Configuring the Time-to-Live (TTL) Value (see page 18-16)
– Configuring Route Map Redistribution (see page 18-16)
– IP-Directed Broadcasts (see page 18-22)
– Protecting the Switch from Denial of Service (DoS) attacks (see page 18-22)
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