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Scenarios 503
Figure 13-18
Scenario 1
Scenario 1 Suggested Solution
There are other ways of meeting the company's requirements. This is only a recommended
solution that meets the requirements placed on the CCDP.
The CCDP decides to meet the requirement to eliminate the costly leased lines by implementing
the STUN protocol between the routers to transport the legacy traffic.
In Figure 13-19, the legacy X.25 switches have two paths through the network for redundancy.
Let's take a look at the commands used to perform STUN:
Command
Description
interface Loopback1
Creates a loopback interface
ip address 1.1.1.1 255.255.255.0
Use this address for the STUN peer name
Chicago
Livermore
New York
Annapolis
Legacy X.25 switch
Legacy X.25 switch
Legacy X.25 switch
Legacy X.25 switch
256 kbps
256 kbps
256 kbps
256 kbps
Chicago
New York
Annapolis
DS3
DS3
DS3
DS3
ATM
cloud
45 Mbps
7500
7500
7500
7500
Livermore
continues
87200333.book Page 503 Wednesday, August 22, 2001 1:41 PM