Cisco Systems 78-11741-02 manual IP Domains Example, Dynamic Lookup Example, Logical Nbma Example

Configuring IP Addressing

IP Addressing Examples

ip address 145.22.4.67 255.255.255.0 interface serial 1

ip unnumbered ethernet 0

IP Domains Example

The following example establishes a domain list with several alternate domain names:

ip domain list csi.com

ip domain list telecomprog.edu ip domain-list merit.edu

Dynamic Lookup Example

Acache of host name-to-address mappings is used by connect, telnet, ping, trace, write net, and configure net EXEC commands to speed the process of converting names to addresses. The commands used in this example specify the form of dynamic name lookup to be used. Static name lookup also can be configured.

The following example configures the host name-to-address mapping process. IP DNS-based translation is specified, the addresses of the name servers are specified, and the default domain name is given.

!IP Domain Name System (DNS)-based host name-to-address translation is enabled ip domain lookup

!Specifies host 131.108.1.111 as the primary name server and host 131.108.1.2

!as the secondary server

ip name-server 131.108.1.111 131.108.1.2

!Defines cisco.com as the default domain name the router uses to complete

!unqualified host names

ip domain name cisco.com

HP Hosts on a Network Segment Example

The following example has a network segment with HP devices on it. The commands in this example customize the first Ethernet port to respond to Probe name requests for the host name, and to use Probe and ARP.

ip hp-host bl4zip 131.24.6.27 interface ethernet 0

arp probe

ip probe proxy

Logical NBMA Example

A logical NBMA network is considered the group of interfaces and hosts participating in NHRP and having the same network identifier. Figure 9 illustrates two logical NBMA networks (shown as circles) configured over a single physical NBMA network. Router A can communicate with routers B and C because they share the same network identifier (2). Router C can also communicate with routers D and E because they share network identifier 7. After address resolution is complete, router A can send IP packets to router C in one hop, and router C can send them to router E in one hop, as shown by the dotted lines.

Cisco IOS IP Configuration Guide

IPC-51