Section 4: ISDN (6 Points)
Configure ISDN on R3 and R5 using PPP. R3 and R5 should be able to ping each other across the ISDN link.
If you configured this correctly as shown in Example 5-31, you have scored 2 points.
Make sure that routing protocols will pass through the ISDN link only when it is up.
If you configured this correctly as shown in Example 5-31, you have scored 2 points.
The key to configuring as requested is to avoid the ISDN to advertise or pass traffic through the link when R5-fa0/0 is up. R3 and R5 are running CLNS, which makes the scenario even more interesting. Remember that your ISDN or BRI interfaces are running IS-IS.
Example 5-31 shows the comfiguration to accomplish the ISDN requirements. To make your ISDN work in some ...
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