Saturday, March 11, 2006


Interface priority commands for OSPF and IS-IS.

Note how the command to set the interface priority is ip ospf priority while for IS-IS it is just isis priority. (In the IS-IS case, the ip keyword is left out). An understanding of how IS-IS was originally an OSI routing protocol that was only later extended to IP leads one to appreciate the fact that the dropping of the ip keyword is more than just some inconsistent CLI developed by Cisco and is very likely a thought-out omission that makes perfect sense.

OSPF was developed exclusively with IP. ISIS is protocol independent and can support IP V4, IP V6 and CLNS protocol. If you put the protocol at the front you would have to have IP ISIS Priority, IPV6 ISIS Priority, CLNS ISIS Priority etc.
I would like to share a list of Cisco exam-related articles and tips, at 100Questions Exam Portal ( . CISCO 640-822 CCENT (100 Questions) is the Cisco Certified Networking Entry Technician exam, and covers the skills required for entry-level network support positions, and is the starting point for many networking careers. CCENT is the first step towards CCNA, and our exam volume prepares you to ace your exam.

CISCO CCNA Exam (100 Questions), or the Cisco Certified Network Associate validates the ability to install, configure, operate and troubleshoot medium-sized routed and switched networks. This includes basic mitigation of security threats, introduction to wireless networking concepts and terminology, and performance-based skills.

The other good thing is that you can test your Cisco knowledge and prepare for the exam via the exam library, which contains free-to-try exam questions. The Cisco reference section could be accessed from the drop-down menu, and because the portal covers several topics, it could be confusing initially due to the enormous amount of data, but if you spend some time navigating the contents you might be well-rewarded!

Another good site (if you need another one) is Exam Fight, at

Hope this helps!

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