Configuring IP Addressing

IP Addressing Examples

ip nhrp network-id 1 ip nhrp nhs 11.0.0.4 tunnel source ethernet 0 tunnel mode gre multipoint tunnel key 1

interface ethernet 0

ip address 10.0.0.3 255.0.0.0

Router D Configuration

interface tunnel 0 no ip redirects

ip address 11.0.0.4 255.0.0.0 ip nhrp map 11.0.0.1 10.0.0.1 ip nhrp network-id 1

ip nhrp nhs 11.0.0.1 tunnel source ethernet 0 tunnel mode gre multipoint tunnel key 1

interface ethernet 0

ip address 10.0.0.4 255.0.0.0

Broadcasting Examples

The Cisco IOS software supports two types of broadcasting: directed broadcasting and flooding. A directed broadcast is a packet sent to a specific network or series of networks, and a flooded broadcast is a packet sent to every network. The following sections describe configurations for both types of broadcasting.

Flooded Broadcast Example

Figure 12 shows a flooded broadcast packet being sent to every network. The packet that is incoming from Ethernet interface 0 is flooded to Ethernet interfaces 1 and 2, and to serial interface 0.

Figure 12 IP Flooded Broadcast

E1

E0

E2

S0

S1009a

Cisco IOS IP Configuration Guide

IPC-59

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Cisco Systems 78-11741-02 manual Broadcasting Examples, Flooded Broadcast Example, Router D Configuration, IPC-59