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Configuring IP Addressing
IP Addressing Examples
IPC-59
Cisco IOS IP Configuration Guide
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
S1009a
E2
S0
E0