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Master Route Redistribution
To be successful on the BSCI exam and in earning your CCNP, you've got to master route redistribution. This isn't as easy as it sounds, because configuring route redistribution is only half the battle. Whether it's on on an exam or in a real-world production network, you've...

Tips For Terminal Servers
Here's a list of tips to help ensure your Terminal Servers are functioning as efficiently as possible. These are rules I always abide by. Have a look, they may help you too... 1.) Sort your profiles out. Profiles are the biggest cause of slow logons and many other issues in Terminal...

Cisco CCNP / BSCI: Using The OSPF Command...
Your BSCI and CCNP exam success depends on knowing the details, and one such detail is knowing the proper way to summarize routes in OSPF. Route summarization is not just a test of your binary conversion abilities...

OSPF Route Redistribution Review
OSPF route redistribution is an important topic on the BSCI exam, and its a topic full of details and defaults that you need to know for the exam room and the job. To help you pass the BSCI exam, heres a quick review of some of the OSPF route redistribution basics. To see...

Changing Root Bridge Election Results
Your BCMSN and CCNP studies will include mastering the details of Spanning Tree Protocol (STP). While you learned some of these details in your CCNA studies, quite a bit of it may be new to you. Before going on to the intermediate and advanced STP features, lets...


03.12.07


ISDN Details You Must Know

By Chris Bryant

CCNA exam success depends partially on knowing the details of ISDN, and there are plenty of them!

To help you review for your CCNA exam, here are a few ISDN details that you must know on exam day. (They help in the real world, too - and there are still plenty of ISDN networks out there!

The Cisco-proprietary version of HDLC is the default encapsulation type for serial and ISDN interfaces.



While there's only one D-channel in BRI, PRI (US) and PRI (EU), the bandwidth of that D-channel does vary from BRI to PRI. It's 16 kbps in BRI and 64 kbps in both PRI versions.

The global command isdn switch-type must be configured before you can even begin to have ISDN work. show isdn status will tell you whether or not you've done this correctly.

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PAP allows passwords to be different; CHAP requires that they be the same.

PAP requires the "ppp pap sent-username" interface-level command. CHAP has no equivalent command.

Define interesting traffic with dialer-list and link that list to the interface with dialer-group.



The dialer idle-timeout value is expressed in seconds, not minutes. (Even IOS Help isn't totally clear on this.)

Continue reading this article.


About the Author:
Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage (www.thebryantadvantage.com), home of FREE CCNA and CCNP tutorials and daily exam questions, as well as The Ultimate CCNA and CCNP Study Packages.

For a FREE copy of his latest e-books, "How To Pass The CCNA" or "How To Pass The CCNP", and for free daily exam question, visit the website and download your copies!

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