Exam Preparation II

From Cisco Netacademy

http://dl.dropbox.com/u/55776142/INTT%20Revision%20Pack%201.zip
http://dl.dropbox.com/u/55776142/INTT%20Revision%20Pack%201%20Answers.zip

From Test King (Choose topic 1 and 4)

http://dl.dropbox.com/u/55776142/Testking%20V23%20CCNA_640-802.pdf

Will go through some of them in class

Chapter 10 learning materials uploaded

Hello ! The presentation slides for Chapter 10 are as follows:

Instructor Slides
http://dl.dropbox.com/u/55776142/Chapter%2010_Keypoint.pdf
Summary Slides (Beginner)
http://dl.dropbox.com/u/55776142/CCNA2_Chp10_Link_State_V1.ppt
Slightly Detailed Slides (Intermediate)
http://dl.dropbox.com/u/55776142/Expl_Rtr_chapter_10_Link_State.ppt
Detailed Slides (Advanced)
http://ibizzone.ite.edu.sg/elearning/file.php/38/Internetworking/Exp_2-Ch_10-Link-State.pdf
Quiz
http://ibizzone.ite.edu.sg/elearning/mod/quiz/view.php?id=3441

Follow your skill level and go through the slides. If you feel comfortable, go through the higher level slides as well and finally, attempt the quiz

Chapter 8 learning materials uploaded

Hello ! The presentation slides for Chapter 8 are as follows:

Instructor Slides
http://dl.dropbox.com/u/55776142/Chapter%208_Keypoint.pdf
Summary Slides (Beginner)
http://dl.dropbox.com/u/55776142/CCNA2_Chp8_Routing_Table_V1.ppt
Slightly Detailed Slides (Intermediate)
http://dl.dropbox.com/u/55776142/Expl_Rtr_chapter_08_Routing%20_Table.ppt
Detailed Slides (Advanced)
http://ibizzone.ite.edu.sg/elearning/file.php/38/Internetworking/Exp_2-Ch_8-Child-Parent-Route.pdf
Quiz
http://ibizzone.ite.edu.sg/elearning/mod/quiz/view.php?id=3439

Follow your skill level and go through the slides. If you feel comfortable, go through the higher level slides as well and finally, attempt the quiz

Exam Preparation

From Cisco Netacademy

http://dl.dropbox.com/u/55776142/INTT%20Revision%20Pack%201.zip

From Test King (Choose topic 1 and 4)

http://dl.dropbox.com/u/55776142/Testking%20V23%20CCNA_640-802.pdf

Will go through some of them in class

Students' network diagrams

Now that we are coming towards the end of our course, here are the networks constructed by some of you.

http://dl.dropbox.com/u/55776142/Stickman.pkt (Courtesy of Zhihao)
http://dl.dropbox.com/u/55776142/TEEHEE%21.pkt (Courtesy of Joel)
http://dl.dropbox.com/u/55776142/RoboLab.pkt (Courtesy of Lambert)
http://dl.dropbox.com/u/55776142/EIGRP%2C%20RIPv2%2C%20Dynamic%2C%20CRAZY%20v2.pkt (Courtesy of Boon Wei, without network addresses)

Please spend some time over the weekend to practise configuring on them, especially those participating in Netrider competition on 20th September.

Redistribution

A lot of students are confused by redistribution. Actually in a nutshell, it is just borrowing routes from other protocols and advertising them as your own routes. Why borrowing? Sometimes you are merging the networks of two different organizations (one running on EIGRP and another running on OSPF). Generally people are resistant to changes and do not want to change their networks to cater for the other party. Thus, redistribution is useful in this scenario here. You only need to make changes on the network boundaries or border router (converting EIGRP to OSPF routes and vice versa). This way, it enables networks running on different routing protocols to work with one another in a seamless manner.

For the border router, you need to run the following commands (assuming a border router with 3 different routing protocols and static routes configured)

router eigrp xx
redistribute rip metric 10000 100 255 1 1500
redistribute ospf xx metric 10000 100 255 1 1500
redistribute static metric 10000 100 255 1 1500

router rip
redistribute ospf xx metric 1
redistribute eigrp xx metric 1
redistribute static metric 1

router ospf xx
redistribute eigrp xx metric 1 subnets
redistribute rip metric 1 subnets
redistribute static metric 1 subnets

The values used are default values. It will be useful to rememeber them.

Static Route Basic/Challenge

Here is your basic/challenge

http://dl.dropbox.com/u/55776142/Static%20Route%20Basic.pkt
http://dl.dropbox.com/u/55776142/Static%20Route%20Challenge.pkt

Remember these subnet masks
/24 - 255.255.255.0
/28 - 255.255.255.240
/30 - 255.255.255.252

Chapter 11 learning materials uploaded

Hello ! The presentation slides for Chapter 11 are as follows:

Summary Slides (Beginner)
http://dl.dropbox.com/u/55776142/CCNA2_Chp11_OSPF_V1.ppt
Slightly Detailed Slides (Intermediate)
http://dl.dropbox.com/u/55776142/Expl_Rtr_chapter_11_OSPF.ppt
Detailed Slides (Advanced)
http://ibizzone.ite.edu.sg/elearning/mod/resource/view.php?id=3060
Quiz
http://ibizzone.ite.edu.sg/elearning/mod/quiz/view.php?id=3442

Follow your skill level and go through the slides. If you feel comfortable, go through the higher level slides as well and finally, attempt the quiz

OSPF in a nutshell

Packet Types
=========
Hello
Database Description
Link State Request
Link State Update - 7 other Link State Advertisements
Link State Ack

Initial State
========
Router send hello packets
To achieve adjacency, need same hello interval, dead interval (4 hello intervals) and network types
DR/BDR election

For multiaccess networks or point to point network, need to elect DR and BDR and DROTHERs

This is to reduce the number of routing messages sent.

DR/BDR election
=============
Refer to priority (default = 1)
If same, refer to router-id
If unavailable, refer to highest loopback address
If unavailable, refer to highest active physical address

DROTHERs to DR/BDR - 224.0.0.6
DR to BDR/DROTHERs - 224.0.0.5

sh ip ospf neighbor - show neighbor table (unique)
sh ip ospf database - show topology table (same)
sh ip route - show routing table (unique)
sh ip protocols

For the new router id to take effect, use clear ip ospf process to restart the process
To make sure that router to come up as DR/BDR, switch them on first

Metrics
=====
Cost = 100,000,000 / Bandwidth

Use the default bandwidth (100 Mbps or 1.544 Mbps), can change via
1) bandwidth xxx (change bandwidth)
2) ip ospf cost xxx (change cost)

Chapter 11 instructor slides uploaded

The chapter 11 instructor slides are uploaded in

http://dl.dropbox.com/u/55776142/Chapter%2011_Keypoint.pdf