
Using PPP To Provide Remote Network Access • Chapter 3 85
■
Associate an asynchronous interface with a loopback address (also
involves using IP unnumbered on the interface with the [ipx
ppp-client loopback number] command). This technique is
used to conserve IP address space as the asynchronous interface
uses the IP address of the loopback interface. Using unnumbered
interfaces is a convenient way to simplify router configuration
while saving valuable IP address space for other uses.
NOTE
When “ip unnumbered” is used, the IP address of the loopback interface
does not have to be on the same subnet as the remote host router being
called.
Cisco supports a couple ...