R3303-HP HSR6800 Routers Layer 3 - IP Services Configuration Guide

Step Command Remarks

1. Enter system view.

system-view N/A

2. Enter interface view.

interface interface-type

interface-number

N/A

3. Specify the current interface to

borrow the IP address of the

specified interface.

ip address unnumbered interface

interface-type interface-number

The interface does not borrow IP

addresses from other interfaces by

default.

Configuration example

Network requirements

As shown in Figure 9, two routers on an intranet are connected to each other through serial interfaces

across a Digital Data Network (DDN), and they each connect to a LAN through Ethernet interfaces.

To save IP addresses, configure the serial interfaces to borrow IP addresses from the Ethernet interfaces.

Figure 9 Network diagram

Configuration procedure

1. Configure Router A:

# Assign a primary IP address to GigabitEthernet 2/1/1.

<RouterA> system-view

[RouterA] interface GigabitEthernet 2/1/1

[RouterA-GigabitEthernet2/1/1] ip address 172.16.10.1 255.255.255.0

[RouterA-GigabitEthernet2/1/1] quit

# Configure Serial 2/1/1 to borrow an IP address from GigabitEthernet 2/1/1.

[RouterA] interface serial 2/1/1

[RouterA-Serial2/1/1] ip address unnumbered interface GigabitEthernet 2/1/1

[RouterA-Serial2/1/1] quit

# Create a route to the subnet attached to Router B, specifying interface Serial 2/1/1 as the output

interface.

[RouterA] ip route-static 172.16.20.0 255.255.255.0 serial 2/1/1

2. Configure Router B:

# Assign a primary IP address to GigabitEthernet 2/1/1.