D-Link DI-1750 Reference Manual page 238

(00)originate
Please Input the code of command to be excute(0-0): 0
input 0，Select originate option ，prompt is as below:
(00)always
(01)route-map
(02)<cr>
Please Input the code of command to be excute(0-2):
Select parameter and confirm it.
6.11.13 Force the Router ID Choice with a Loopback Interface
OSPF uses the largest IP address configured on the interfaces as its router ID. If the interface
associated with this IP address is ever brought down, or if the address is removed, the OSPF process
must recalculate a new router ID and resend all its routing information out its interfaces.
If a loopback interface is configured with an IP address, the router will use this IP address as its router
ID, even if other interfaces have larger IP addresses. Since loopback interfaces never go down, greater
stability in the routing table is achieved.
OSPF automatically prefers a loopback interface over any other kind, and it chooses the highest IP
address among all loopback interfaces. If no loopback interfaces are present, the highest IP address in
the router is chosen. You cannot tell OSPF to use any particular interface.
To configure an IP address on a loopback interface, use the following commands, starting in global
configuration directory:
interface loopback 0
ip addrp-address mask
Step1：
input interface Command，prompt is as below:
(00)FastEthernet
......
(05)Loopback
......
Please Input the code of command to be excute(0-10): 5
input 5，Select Loopback option ，then prompt is as below:
Please input a interface name:loopback 0
input loopback 0.
Step2：
In the prompt Select 13 option ，prompt is as below:
(00)access-group
(01)address
(02)beigrp
......
Please Input the code of command to be excute(0-18): 1
input 1，Select address option ，prompt is as below:
(00)A.B.C.D
(01)dhcp
Please Input the code of command to be excute(0-1): 0
input 0，Select A.B.C.D option ，then prompt is as below:
Please input a IP Address:
input address ，prompt is as below:
(00)A.B.C.D
Please Input the code of command to be excute(0-0): 0
input 0，Select A.B.C.D option ，then prompt is as below:
Distribute a default route
Always advertise default route
Route-map reference
Command
FastEthernet interface
Loopback interface
Specify access control for packets
IP address
Enhanced Interior Gateway Routing Protocol
IP address
IP Address negotiated via DHCP
IP netmask
Model Name
Function
Create a loopback interface, which places you in
interface configuration mode.
Assign an IP address to this interface.
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