IE's Brian Dennis Now 5-Time CCIE
Congratulations to IE instructor Brian Dennis who recently passed the CCIE Voice Lab Exam. This is Brian's 5th CCIE making him one of very few in the elite group of engineers with FIVE CCIEs!
CCIE Class On Demand DVD's are now available!
We now have our Advanced Technologies Class-on-Demand for CCIE R&S, CCIE Security, and CCIE Service Provider (Avail. May 30th). Our DVD Class-on-Demand series creates flexible, self-paced training for all candidates.
CCIE Dynamips Lab Workbook Part II is now available to compliment our Dynamips Workbook Part I.
Complete labs 11-20 from R&S Workbook II using the Dynamips IOS emulation platform.
More CCIE insight in our new CCIE BLOG - check out Brian Dennis' and Brian McGahan's posts on the recent CCIE issues!
Voice Rack Rental Tokens are now available for purchase. Our ccie Voice rack sessions can help you in preparing for the CCIE Voice Lab Exam.
FREE Technology V-Seminars
Join Brian Dennis and Brian McGahan as they discuss the latest hot topics in the world of CCIE preparation. FREE Technology V-Seminars not only cover a wide range of subjects related to the CCIE technologies but also the most efficient and effective strategies to pass the LAB EXAM. Watch Now!
Dynamips Lab Workbook
Internetwork Expert is proud to introduce our new CCIE Routing & Switching Dynamips Lab Workbook (IEWB-RS-DYN-EL). It consists of all 20 labs from our CCIE Routing & Switching Lab Workbook Volume II (IEWB-RS-VOL2) which have been reconfigured to run on the open-source Dynamips IOS emulation platform. This product is available exclusively in electronic format, and is broken down into two parts. Part 1 consists of labs 1-10 from IEWB-RS-VOL2, and part 2 consists of labs 11-20 from IEWB-RS-VOL2.
For a detailed overview of what Dynamips is and how to use it refer to Using Dynamips for CCIE Lab Preparation.
Part 1 of IEWB-RS-DYN-EL will be available for purchase by July 31st, 2007. For more information visit our CCIE Routing & Switching Dynamips Lab Workbook page or contact the Internetwork Expert sales department.
Internetwork Expert is going global!
Internetwork Expert would like to offer additional/new training opportunities in Europe (Amsterdam, Dublin, London, Moscow), Asia (Dubai, Singapore) and Australia (Sydney).
Please let us know if you are interested in the CCIE training in any of these locations by filling out this survey >>
Jobs @ Cisco
Internetwork Expert, in cooperation with Cisco Systems, is proud to introduce CCIE Cisco Job Board. Visit our web site and check out Cisco's current career opportunities.
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Robert Bryant
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CCIE #19600
Mounir Mohamed
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Saul Arjona
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Deepak Ahuja
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Christian Zeng
CCIE #19533
Kudinov Yury
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Ray Philip
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Juan Carlos
CCIE #19460
Muhammad Khurram Siddiqi
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Stephen Lee
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Balmik Soin
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Dave Smith
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Azam Poulatov
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CCIE #17857
Mykyta Popov
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CCIE #17838
Ken Norton
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Luqman Kondeth
CCIE #17561
Ram Patla
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Firas Hammad
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CCIE #17524
Andre Serrao
CCIE #17518
Clifton Folkerts
CCIE #17516
Michal Duchacek
CCIE #17484
Ali Mummar
CCIE #17477
Kemal Haydar
CCIE #17474
Colm O'Leary
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Robert Watson
CCIE #17457
Pipatpong Samranpit
CCIE #17451
Vlaho Jemin
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Michael Marran
CCIE #17439
Prio Utomo
CCIE #17431
Jim White
CCIE #17409
Alexey Tolstenok
CCIE #17405
Vladimir Starovatov
CCIE #17403
Jeff Stevenson
CCIE #17401
Abhi Gupta
CCIE #17390
Luke Lambert
CCIE #17389
Nick Griffin
CCIE #17381
Devin Kinch
CCIE #17372
Leo Boulton
CCIE #17360
Mohamed Saeed
CCIE #17359
Elias Chari
CCIE #17354
Danny Muizebelt
CCIE #17353
Imran Mazhar
CCIE #17328
Eduardo Soberanis
CCIE #17315
Greg Falkowski
CCIE #17314
Simon Stoll
CCIE #17297
Lawny Johnson
CCIE #17286
Hussein Ghazy
CCIE #17263
John Offersen
CCIE #17254
Ankush Arora
CCIE #17241
Peter Hayashi
CCIE #17238
Alexei Monastyrnyi
CCIE #17234
Ashish Charate
CCIE #17228
Drew Keller
CCIE #17219
Manoj J. Melwani
CCIE #17197
Sreenivasa Reddy Kaki
CCIE #17186
Daniel Bliss
CCIE #17184
Amir Ifzal
CCIE #17179
Aaron Pilcher
CCIE #17168
Rodrigo Hernandez
CCIE #17162
Radoslav Vasilev
CCIE #17147
Jung-I Lin
CCIE #17142
Pandi Moorthy
CCIE #17124
Adam Bottomley
CCIE #17100
Daniel Fredrick
CCIE #17094
Nguyen Cong Toan
CCIE #17089
Sean Connelly
CCIE #17085
Mike Louis
CCIE #17082
Scott Smith
CCIE #17040
Jeff Ryan
CCIE #17038
Daniel Roman
CCIE #17036
Loc Pham
CCIE #17030
Marcus Washco
CCIE #17019
Tony Paterra
CCIE #17018
Erez Jordan Gottlieb
CCIE #17010
Zafar Khan
CCIE #16999
George Nguyen
CCIE #16996
Jim Voyles
CCIE #16995
Carlos Torres
CCIE #16993
Julian Hart
CCIE #16992
Sabrina Pittarel
CCIE #16986
Charles Budiman
CCIE #16977
Sunil Almeida
CCIE #16966
Juan Perez
CCIE #16963
Nenad Micic
CCIE #16954
Cesar Chavez
CCIE #16943
Suhento Gunawan
CCIE #16940
Kenny Tse
CCIE #16924
Craig Tompkins
CCIE #16921
Arunkumar Arumuganainar
CCIE #16918
Yan Anchipolovskiy
CCIE #16899
Fraser Morehouse
CCIE #16886
Bandar M. AlSaifi
CCIE #16876
Maciej Chudzik
CCIE #16859
Kaloyan Kaloyanov
CCIE #16856
Paul Dardinski
CCIE #16842
Aamir Aziz
CCIE #16839
Thomas McCarroll
CCIE #16828
Matthew Clark
CCIE #16827
Mike West
CCIE #16815
B. Kim
CCIE #16814
James Simons
CCIE #16808
Imran Moin
CCIE #16803
Eric DeGolyer
CCIE #16802
Kayode Oladipo
CCIE #16791
Drayton Williams
CCIE #16790
Sarabjit Herr
CCIE #16780
Siang Gek Heng
CCIE #16779
Anderson Alves
CCIE #16778
Burak A. Gocmen
CCIE #16777
Andras Kulcsar
CCIE #16768
Christian Sica
CCIE #16762
Stephen Kellaher
CCIE #16753
Evoldus Fernando
CCIE #16713
A. Seetharaman
CCIE #16678
Orhan Osmanov
CCIE #16648
Magahet Mendiola
CCIE #16639
Mickey Merchant
CCIE #16624
Mihai Dumitru
CCIE #16616
Nick Sciarrilli
CCIE #16602
Gene Thorne
CCIE #16570
Leigh Nash
CCIE #16543
Carlos Alcantara
CCIE #16523
Earl Hough
CCIE #16508
Andrew Radford
CCIE #16499
Neil Dearman
CCIE #16479
Prakash Sosle
CCIE #16471
Godswill Oletu
CCIE #16464
P. Nikolay
CCIE #16461
Joseph Fu
CCIE #16454
Mattie Kavanagh
CCIE #16407
Jimmy Williams
CCIE #16399
Jarle Utne
CCIE #16397
Uma Mylaraiah
CCIE #16394
Petr Lapukhov
CCIE #16379
Darren Horobin
CCIE #16366
Dan McRae
CCIE #16365
Chris Lewis
CCIE #16364
Patani Mienbaikebi
CCIE #16361
Mazen Nassar
CCIE #16359
Jonathan Roberts
CCIE #16350
A. Khadr
CCIE #16343
Diego Veca
CCIE #16322
Italo Brito
CCIE #16321
Tracy Kirby
CCIE #16320
Pritpal Sehmi
CCIE #16300
Venkatesh Palani
CCIE #16294
Marco Gaona
CCIE #16287
Jeff Lacouture
CCIE #16264
John Clarke
CCIE #16262
Justin Poole
CCIE #16224
Luis Rueda
CCIE #16162
Brad McConnell
CCIE #16147
Juan Mayorga
CCIE #16141
Alfredo Ruiz
CCIE #16121
William Fosket
CCIE #16041
Michael Brooks
CCIE #16027
Joshua Lauer
CCIE #16024
Muktar B. Julkipli
CCIE #16022
Mushtaq Ahmed
CCIE #15989
Jared Eller
CCIE #15979
Damjan Marion
CCIE #15978
Ian Kirkpatrick
CCIE #15960
Daniel Berlinski
CCIE #15947
Rani Chouha
CCIE #15943
Ronald Kaduwa
CCIE #15934
Lukasz Bromirski
CCIE #15929
Ahmed Shams
CCIE #15896
A. Chalamannil
CCIE #15891
Steve De Vera
CCIE #15885
John Crawford
CCIE #15870
Trent Husking
CCIE #15809
Nick Amento
CCIE #15803
Haiwei Dong
CCIE #15799
Chamandeep Gill
CCIE #15795
Inderpal Singh
CCIE #15745
Ayman Hamdallah Hamed
CCIE #15733
Chad Hintz
CCIE #15729
Ben Hawkins
CCIE #15725
Peter McCreesh
CCIE #15722
Duane DeWitt
CCIE #15715
Rajesh Chacko
CCIE #15703
Dehong Wang
CCIE #15686
Derick Winkworth
CCIE #15672
Jeff Lodwick
CCIE #15671
Donald Lakey
CCIE #15669
Vernon Thaver
CCIE #15661
Alexander Roelich
CCIE #15660
Dennis Hartmann
CCIE #15651
Mike Ollington
CCIE #15636
Anthony Sequeira
CCIE #15626
Chula Bandara
CCIE #15623
Gustavo Novais
CCIE #15622
William Wu
CCIE #15612
Roy Sam
CCIE #15604
Niraj Palikhey
CCIE #15588
Andres D. Casillas
CCIE #15585
Jayson Tobias
CCIE #15550
Mike Flanagan
CCIE #15541
Narcis Micsoniu
CCIE #15528
Rabiul Hasan
CCIE #15506
Roel Cuppen
CCIE #15497
Ramiro Garza
CCIE #15469
Piotr Jelonek
CCIE #15426
Jason Edelman
CCIE #15394
David Browning
CCIE #15393
Manoj Menon
CCIE #15387
Kevin Gannon
CCIE #15386
Tim Borgert
CCIE #15366
K. Yamamoto
CCIE #15357
V. Levytskyy
CCIE #15343
Rodolphe Nassar
CCIE #15340
Leigh Harrison
CCIE #15331
Laure Andrieux
CCIE #15313
Graham Hopkins
CCIE #15312
Ayman Soliman
CCIE #15284
Jay Yarborough
CCIE #15281
P. Grygiel
CCIE #15278
Simon Hart
CCIE #15277
Amit Jain
CCIE #15248
William Law
CCIE #15246
Christopher Gatlin
CCIE #15245
Matt Goff
CCIE #15221
Florin Cretu
CCIE #15213
Ioan Stan
CCIE #15181
Paul Thomas
CCIE #15175
Lee Donald
CCIE #15168
Rasal Abdul Kader
CCIE #15125
Jim Feldman
CCIE #15085
Michael DeAngelo
CCIE #15080
Rus Healy
CCIE #15025
Manu Mohan
CCIE #15020
James Keane
CCIE #15009
Grant Stevenson
CCIE #14968
Yash Bajpai
CCIE #14964
Douglas Lardo
CCIE #14943
Kian Wah
CCIE #14929
Marian Cebulski
CCIE #14907
Grzegorz Wrobel
CCIE #14884
Hiroyasu Kato
CCIE #14867
Tresa Antony
CCIE #14862
Francisco Sedano
CCIE #14859
Soma Palani
CCIE #14850
John Ray
CCIE #14845
Wael AlGhamdi
CCIE #14839
Vijay Ramcharan
CCIE #14824
Farai Tafa
CCIE #14811
John Pearson
CCIE #14798
Frank Russo
CCIE #14793
Mihai Petcu
CCIE #14786
James Obot
CCIE #14785
Ali Onder Ergun
CCIE #14746
Justin White
CCIE #14745
Austin Kim
CCIE #14741
K. Radhakrishnan
CCIE #14731
Ian Henderson
CCIE #14721
William Castaneda
CCIE #14719
Sammy Wong
CCIE #14686
Jesse Loggins
CCIE #14661
Oliver Grenham
CCIE #14658
B. Schmid
CCIE #14651
Lars Molstad
CCIE #14647
Mani Poopal
CCIE #14645
Gary Cheung
CCIE #14642
Kieren Carter
CCIE #14593
Hongwei Li
CCIE #14589
Radu Pavaloiu
CCIE #14582
Troy Levin
CCIE #14560
Eric Taylor
CCIE #14551
Jongsoo Kim
CCIE #14539
Matt White
CCIE #14533
Sundar Palaniappan
CCIE #14532
Tarig Hamdi
CCIE #14517
Qobizita Trust Hogo
CCIE #14516
Fernando Rodriguez
CCIE #14481
Felipe Stutz
CCIE #14449
Wei Zhu
CCIE #14438
P. Palanisamy
CCIE #14422
Joseph Kim
CCIE #14421
Koen Denecker
CCIE #14407
Hossam Al-Ashkar
CCIE #14403
John Buelk
CCIE #14388
Jawad Al Akrabawi
CCIE #14383
Ulrich Heuer
CCIE #14378
Rohit Karnani
CCIE #14364
Kenny Chan
CCIE #14354
Roberto Adjakou
CCIE #14351
Akgun Ozsoy
CCIE #14346
Rick Cossey
CCIE #14319
Jean Paul Baaklini
CCIE #14292
Robert Orszycki
CCIE #14291
Elena Bespalova
CCIE #14287
K. Tahsin Hersan
CCIE #14251
Daniel Ginsburg
CCIE #14229
Piotr Bubienczyk
CCIE #14225
John Wong
CCIE #14220
Emil Fernando
CCIE #14213
Muhammad Haseeb
CCIE #14189
Matt Raymer
CCIE #14153
Joseph Rothstein
CCIE #14140
Edward Battams
CCIE #14121
Yogesh Kumar
CCIE #14118
Julian Skelley
CCIE #14112
Frank Fayyaz
CCIE #14106
Brian Bayer
CCIE #14105
Zahid Hassan
CCIE #14103
Jacob Owen
CCIE #14063
Rodrigo Paes
CCIE #14054
Sven Ubik
CCIE #14053
Talal Sabih
CCIE #14052
Anand Singh
CCIE #14048
Jos Gruijters
CCIE #14031
Jeff McLaughlin
CCIE #14023
David Cooper
CCIE #14019
Dina Kamal
CCIE #14011
Pascal Tscharner
CCIE #13944
Chris Lord
CCIE #13925
Joe Johnson
CCIE #13899
Richard Dumoulin
CCIE #13891
Daniel Sheedy
CCIE #13884
Barry Templeton
CCIE #13873
Lirin Patel
CCIE #13866
Ron Jones
CCIE #13862
Mark Keating
CCIE #13860
Carlos Mendioroz
CCIE #13838
Hao Zhong
CCIE #13836
Ronnie Higginbotham
CCIE #13834
Marc Van Hoof
CCIE #13832
Norman Hawkins
CCIE #13807
M. Subramanyam
CCIE #13796
Bjorn Loken
CCIE #13794
Sorel Lam
CCIE #13788
Shah Sayed
CCIE #13731
Koen Peetermans
CCIE #13730
Kenneth Wygand
CCIE #13720
Lance Montgomery
CCIE #13719
Tony Blythe
CCIE #13718
Gerry Hilton
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Jorge Barrera
CCIE #13691
Dan Shechter
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Fatos Dervisi
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J.P. Singh
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Kimberly Whittaker
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Peng Zheng
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David Buechner
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Laurent Metzger
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Taejun Park
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Vikas Khanduri
CCIE #13516
Alberto Pasquale
CCIE #13515
Nigel Johnson
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Tyson Scott
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David Fuentes
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Gökhan Kule
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Tom Young
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Erling Bjontegard
CCIE #13475
Jess Romero
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Murtada Goraish
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Cullen Miculek
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Yiu Lee
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Yi Xue
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Abbas Ali
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Chris Dixon
CCIE #2245
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#15018 - 06/19/07 11:26 PM
Task 4.1
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storm
enthusiast
Registered: 03/16/07
Posts: 205
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When I did this task I immediately wanted to put ip ospf priority 0 on the spoke router interfaces. But it's explicitly denied in the task.
We can increase the priority for R5 to 255, so it will be elected DR in any election but what if the frame-relay fails at R5. R1 and R2 will think they are the DR because they can't communicate with anyone.
The question is what happens when the link comes back up, will R5 "preempt" the DR status of R1 and R2. This type of preemption is not permitted in OSPF as a rule. So I'm guessing the network will break.
I've failed the frame and here is the current state of play:
Rack1R5(config)#int s1/0.125
Rack1R5(config-subif)#shut
Rack1R5(config-subif)#
*Jun 20 16:12:40.806: %OSPF-5-ADJCHG: Process 1, Nbr 150.1.1.1 on Serial1/0.125 from 2WAY to DOWN, Neighbor Down: Interface down or detached
*Jun 20 16:12:40.806: %OSPF-5-ADJCHG: Process 1, Nbr 150.1.2.2 on Serial1/0.125 from FULL to DOWN, Neighbor Down: Interface down or detached
*Jun 20 16:12:40.854: %BGP-5-ADJCHANGE: neighbor 173.1.125.1 Down Interface flap
*Jun 20 16:12:40.854: %BGP-5-ADJCHANGE: neighbor 173.1.125.2 Down Interface flap
Rack1R5(config-subif)#do sh ip ospf int s1/0.125
Serial1/0.125 is administratively down, line protocol is down
Internet Address 173.1.125.5/24, Area 0
Process ID 1, Router ID 150.1.5.5, Network Type BROADCAST, Cost: 64
Transmit Delay is 1 sec, State DOWN, Priority 255
Rack1R1#sh ip ospf int s1/0
Serial1/0 is up, line protocol is up
Internet Address 173.1.125.1/24, Area 0
Process ID 1, Router ID 150.1.1.1, Network Type NON_BROADCAST, Cost: 64
Transmit Delay is 1 sec, State DR, Priority 1
Designated Router (ID) 150.1.1.1, Interface address 173.1.125.1
Rack1R2#sh ip ospf int s1/0
Serial1/0 is up, line protocol is up
Internet Address 173.1.125.2/24, Area 0
Process ID 1, Router ID 150.1.2.2, Network Type NON_BROADCAST, Cost: 64
Transmit Delay is 1 sec, State DR, Priority 1
Designated Router (ID) 150.1.2.2, Interface address 173.1.125.2
So now I'll bring back the FR interface at R5.
Rack1R5(config-subif)#no shut
Rack1R5(config-subif)#
*Jun 20 16:17:09.506: %BGP-5-ADJCHANGE: neighbor 173.1.125.2 Up
*Jun 20 16:17:09.722: %OSPF-5-ADJCHG: Process 1, Nbr 150.1.1.1 on Serial1/0.125 from LOADING to FULL, Loading Done
*Jun 20 16:17:09.726: %OSPF-5-ADJCHG: Process 1, Nbr 150.1.2.2 on Serial1/0.125 from LOADING to FULL, Loading Done
Rack1R5(config-subif)#
*Jun 20 16:17:12.690: %BGP-5-ADJCHANGE: neighbor 173.1.125.1 Up
Rack1R5(config-subif)#do sh ip ospf neigh
Neighbor ID Pri State Dead Time Address Interface
150.1.1.1 1 FULL/DROTHER 00:01:38 173.1.125.1 Serial1/0.125
150.1.2.2 1 FULL/DR 00:01:35 173.1.125.2 Serial1/0.125
Rack1R5(config-subif)#
Rack1R5(config-subif)#do sh ip ospf int s1/0.125
Serial1/0.125 is up, line protocol is up
Internet Address 173.1.125.5/24, Area 0
Process ID 1, Router ID 150.1.5.5, Network Type BROADCAST, Cost: 64
Transmit Delay is 1 sec, State BDR, Priority 255
Designated Router (ID) 150.1.2.2, Interface address 173.1.125.2
So R2 is now the DR according to R5 and it is the BDR. My suspicions about the lack of priority 0 on the spokes appears to be correct. This is a dangerous setup!
What does R1 think?
*Jun 20 16:17:12.174: %BGP-5-ADJCHANGE: neighbor 173.1.125.5 Up
Rack1R1#sh ip ospf neigh
Neighbor ID Pri State Dead Time Address Interface
150.1.3.3 0 FULL/ - 00:00:35 173.1.13.3 Serial1/1
150.1.5.5 255 FULL/BDR 00:01:56 173.1.125.5 Serial1/0
150.1.7.7 0 FULL/ - 00:01:35 173.1.137.7 FastEthernet0/0
Rack1R1#sh ip ospf int s1/0
Serial1/0 is up, line protocol is up
Internet Address 173.1.125.1/24, Area 0
Process ID 1, Router ID 150.1.1.1, Network Type NON_BROADCAST, Cost: 64
Transmit Delay is 1 sec, State DR, Priority 1
Designated Router (ID) 150.1.1.1, Interface address 173.1.125.1
R1 is the DR and R5 is the BDR.
And R2...
Rack1R2#sh ip ospf int s1/0
Serial1/0 is up, line protocol is up
Internet Address 173.1.125.2/24, Area 0
Process ID 1, Router ID 150.1.2.2, Network Type NON_BROADCAST, Cost: 64
Transmit Delay is 1 sec, State DR, Priority 1
Designated Router (ID) 150.1.2.2, Interface address 173.1.125.2
Backup Designated router (ID) 150.1.5.5, Interface address 173.1.125.5
This network is definitely out of whack. I'd pray that the frame interface on R5 didn't cop a hit before the proctor graded your lab!
_________________________
CCIE (R&S)
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#15019 - 07/15/07 03:04 PM
Re: Task 4.1
[Re: storm]
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tvazquez
newbie
Registered: 01/07/07
Posts: 41
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Brians, please correct this question ASAP !!!!!
This task / solution breaks the basic of OSPF over Frame relay.
You guys highlight this kind of scenario so much on CoD to make sure we don't let the spoke become BDR or DR and I'can believe you guys posted such config as a solution.
As demonstrated above this network will break after reload as there is no preemption with OSPF and whatever device comes up 1st it will assume it's the DR.
Please fix this or explain what is the 'logic' behind the solution.
Thanks. 
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#17384 - 11/19/07 01:46 PM
Re: Task 4.1
[Re: tvazquez]
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rgist
newbie
Registered: 03/05/07
Posts: 25
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Although this lab is riddled with poor documentation, i believe this question is not terribly bad. As a best practice, you are right. however, the CCIE test is not about best practices. the point here is that they are trying to get you to think through an unsual problem and use your knowledge to fix it. there is nothing in the question that states it needs to work after a reboot (as dumb as that sounds).
Edited by rgist (11/19/07 01:47 PM)
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#19473 - 12/07/07 02:04 AM
Re: Task 4.1
[Re: rgist]
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Champ
stranger
Registered: 02/05/07
Posts: 22
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Hi all
In task 4.1 of my config i tried using the default non-broadcast network type.
My understaning was that in non-broadcast non-mutiaccess networks the neighbor command send the hellos as unicast.
I am using code 12.4.(10a)
Without changing the network types R1,R2,R5 started sending unicast hellos to each other and the neighbors came up. Is this a bug or what?
Rack1R1#sh run int s0/0
interface Serial0/0
ip address 173.1.125.1 255.255.255.0
encapsulation frame-relay
frame-relay map ip 173.1.125.2 105
frame-relay map ip 173.1.125.5 105 broadcast
no frame-relay inverse-arp
end
Rack1R2#sh run int s0/0
interface Serial0/0
ip address 173.1.125.2 255.255.255.0
encapsulation frame-relay
frame-relay map ip 173.1.125.1 205
frame-relay map ip 173.1.125.5 205 broadcast
no frame-relay inverse-arp
end
Rack1R5#sh run int s0/0.125
!
interface Serial0/0.125 multipoint
ip address 173.1.125.5 255.255.255.0
ip ospf priority 255
frame-relay interface-dlci 501
frame-relay interface-dlci 502
================
Rack1R5#sh ip os int s0/0.125
Serial0/0.125 is up, line protocol is up
Internet Address 173.1.125.5/24, Area 0
Process ID 1, Router ID 150.1.5.5, Network Type NON_BROADCAST, Cost: 64
Transmit Delay is 1 sec, State BDR, Priority 255
Designated Router (ID) 150.1.2.2, Interface address 173.1.125.2
Backup Designated router (ID) 150.1.5.5, Interface address 173.1.125.5
Timer intervals configured, Hello 30, Dead 120, Wait 120, Retransmit 5
oob-resync timeout 120
Hello due in 00:00:07
Supports Link-local Signaling (LLS)
Index 1/1, flood queue length 0
Next 0x0(0)/0x0(0)
Last flood scan length is 0, maximum is 1
Last flood scan time is 0 msec, maximum is 4 msec
Neighbor Count is 2, Adjacent neighbor count is 2
Adjacent with neighbor 150.1.1.1
Adjacent with neighbor 150.1.2.2 (Designated Router)
Suppress hello for 0 neighbor(s)
Rack1R5#
*Mar 1 04:13:42.101: OSPF: Rcv hello from 150.1.2.2 area 0 from Serial0/0.125 173.1.125.2
*Mar 1 04:13:42.101: OSPF: End of hello processing
Rack1R5#
*Mar 1 04:13:46.957: OSPF: Rcv hello from 150.1.1.1 area 0 from Serial0/0.125 173.1.125.1
*Mar 1 04:13:46.957: OSPF: End of hello processing
Rack1R5#
*Mar 1 04:13:48.599: OSPF: Send hello to 173.1.125.1 area 0 on Serial0/0.125 from 173.1.125.5
*Mar 1 04:13:48.599: OSPF: Send hello to 173.1.125.2 area 0 on Serial0/0.125 from 173.1.125.5
Rack1R5#
Rack1R1#sh ip os int s0/0
Serial0/0 is up, line protocol is up
Internet Address 173.1.125.1/24, Area 0
Process ID 1, Router ID 150.1.1.1, Network Type NON_BROADCAST, Cost: 64
Transmit Delay is 1 sec, State DR, Priority 1
Designated Router (ID) 150.1.1.1, Interface address 173.1.125.1
Backup Designated router (ID) 150.1.5.5, Interface address 173.1.125.5
Timer intervals configured, Hello 30, Dead 120, Wait 120, Retransmit 5
oob-resync timeout 120
Hello due in 00:00:02
Supports Link-local Signaling (LLS)
Index 1/1, flood queue length 0
Next 0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 2
Last flood scan time is 0 msec, maximum is 4 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 150.1.5.5 (Backup Designated Router)
Suppress hello for 0 neighbor(s)
Rack1R2#sh ip os int s0/0
Serial0/0 is up, line protocol is up
Internet Address 173.1.125.2/24, Area 0
Process ID 1, Router ID 150.1.2.2, Network Type NON_BROADCAST, Cost: 64
Transmit Delay is 1 sec, State DR, Priority 1
Designated Router (ID) 150.1.2.2, Interface address 173.1.125.2
Backup Designated router (ID) 150.1.5.5, Interface address 173.1.125.5
Timer intervals configured, Hello 30, Dead 120, Wait 120, Retransmit 5
oob-resync timeout 120
Hello due in 00:00:11
Supports Link-local Signaling (LLS)
Index 1/1, flood queue length 0
Next 0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 2
Last flood scan time is 0 msec, maximum is 4 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 150.1.5.5 (Backup Designated Router)
Suppress hello for 0 neighbor(s)
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#19477 - 12/07/07 07:09 AM
Re: Task 4.1
[Re: Champ]
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Darrell Escola
member
Registered: 07/09/07
Posts: 174
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Champ,
In your config the subinterface is a multipoint subinterface - a physical interface and multipoint subinterface have the same ip ospf network type - non-broadcast.
As long as a neighbor statement is configured on one end of the link (or one end is changed to broadcast with broadcast enabled on the frame relay link) the neighbor relationship should form - broadcast/non-broadcast will require timer adjustments as well.
OSPF doesn't care if you are using a physical interface or a multipoint subinterface - they both look the same to OSPF.
Darrell
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#22046 - 02/06/08 01:02 PM
Re: Task 4.1
[Re: Darrell Escola]
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joachim
stranger
Registered: 12/20/07
Posts: 18
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I used ip ospf net point-to-multipoint for this qns. No need to change the hello timer..
Rack1R5(config-subif)#do sh ip ospf int s1/0.125
Serial1/0.125 is up, line protocol is up
Internet Address 173.1.125.5/24, Area 0
Process ID 1, Router ID 150.1.5.5, Network Type POINT_TO_MULTIPOINT, Cost: 64
Transmit Delay is 1 sec, State POINT_TO_MULTIPOINT,
Timer intervals configured, Hello 30, Dead 120, Wait 120, Retransmit 5
oob-resync timeout 120
Hello due in 00:00:11
Supports Link-local Signaling (LLS)
Index 1/1, flood queue length 0
Next 0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 1
Last flood scan time is 4 msec, maximum is 4 msec
Neighbor Count is 2, Adjacent neighbor count is 2
Adjacent with neighbor 150.1.1.1
Adjacent with neighbor 150.1.2.2
Suppress hello for 0 neighbor(s)
Rack1R5(config-subif)#
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#22062 - 02/07/08 11:15 AM
Re: Task 4.1
[Re: joachim]
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octopus
stranger
Registered: 03/16/07
Posts: 22
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Like joachim, I also used the ip ospf net point-to-multipoint in the s0/0.125 interface. The neighbor was formed with R1 and R2. However, no routes was learned from R1 and R2. That's strange!
interface Serial0/0.125 multipoint
ip ospf network point-to-multipoint
Rack1R5#show ip ospf nei
Neighbor ID Pri State Dead Time Address Interface
150.1.1.1 0 FULL/ - 00:01:37 173.1.125.1 Serial0/0.125
150.1.2.2 0 FULL/ - 00:01:43 173.1.125.2 Serial0/0.125
Rack1R5#show ip route os
Rack1R5#show ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
173.1.0.0/24 is subnetted, 3 subnets
C 173.1.54.0 is directly connected, Serial0/0.54
C 173.1.5.0 is directly connected, Ethernet0/1
C 173.1.125.0 is directly connected, Serial0/0.125
C 192.10.1.0/24 is directly connected, Ethernet0/0
150.1.0.0/24 is subnetted, 1 subnets
C 150.1.5.0 is directly connected, Loopback0
!!! NO OSPF Routes learned from R1 and R2. Why????? I had tried all the OSPF debug on. Nothing was wrong from debug.
But, if I used broadcast from the SG, it worked and routes were learned from R1 and R2.
interface Serial0/0.125 multipoint
ip ospf network broadcast
ip ospf hello-interval 30
ip ospf priority 255
Rack1R5#show ip ospf nei
Neighbor ID Pri State Dead Time Address Interface
150.1.1.1 1 FULL/DROTHER 00:01:59 173.1.125.1 Serial0/0.125
150.1.2.2 1 FULL/DROTHER 00:01:58 173.1.125.2 Serial0/0.125
Rack1R5#show ip route os
173.1.0.0/24 is subnetted, 5 subnets
O 173.1.13.0 [110/128] via 173.1.125.1, 00:00:28, Serial0/0.125
O 173.1.23.0 [110/65] via 173.1.125.2, 00:00:28, Serial0/0.125
150.1.0.0/16 is variably subnetted, 4 subnets, 2 masks
O 150.1.3.3/32 [110/66] via 173.1.125.2, 00:00:28, Serial0/0.125
O 150.1.2.2/32 [110/65] via 173.1.125.2, 00:00:28, Serial0/0.125
O 150.1.1.1/32 [110/65] via 173.1.125.1, 00:00:28, Serial0/0.125
Does anyone know why? Is this an IOS bug or simply my leak of knowledge in FR and OSPF?
Thanks.
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#22063 - 02/07/08 12:49 PM
Re: Task 4.1
[Re: octopus]
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joachim
stranger
Registered: 12/20/07
Posts: 18
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Octopus, have the same problem but solved it by adding the ip ospf network point-to-multipoint statement on both R1 and R2.
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#22064 - 02/07/08 01:50 PM
Re: Task 4.1
[Re: joachim]
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Darrell Escola
member
Registered: 07/09/07
Posts: 174
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The instructions for this task state: "Do not use the neighbor command to accomplish this." and "Do not use any interface level commands on R1 or R2 to accomplish this."
This means that R1 will have the NON_BROADCAST ip ospf network type, since 2.1 requires it to use the main interface.
Since R1 is required to use NON_BROADCAST, which requires a DR, R5 and R2 will need a network type that supports a DR, and R2 will also require the same default timer values as R1, since neither router is allowed to use interface level commands to make this task work. R2 can either use the main interface or a multipoint subinterface.
Since neighbor statements are prohibited, R5 will need to have the ip ospf network broadcast statement under its multipoint subinterface, and the hello timer will need to be changed from the default to match the non-broadcast timers on R1 and R2.
Although it can seem that a neighbor relationship is forming between a router with a network type that requires a DR (broadcast or non-broadcast) and a router with a network type that does not support a DR (point-to-multipoint or point-to-point), routes will never be exchanged, since one router expects a DR and the other will not use a DR.
In order to form an adjacency AND to exchange routes, all routers must have the same hello and dead timers, and all routers must agree on whether there should be a DR.
The SG shows ip ospf network broadcast, ip ospf priority 255, and ip ospf hello-interval 30 on R5 S0/0.125 to match R1 and R2 non-broadcast timers, and to assure that R5 is elected DR. R1 and R2 have no neighbor statements, and cannot use multicast to initiate an ospf adjacency, but R5 can establish the adjacencies and will be DR.
Darrell
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#23468 - 04/14/08 02:07 PM
Re: Task 4.1
[Re: Darrell Escola]
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Omair
stranger
Registered: 04/13/08
Posts: 5
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I dont understand why they are stopping us to not to use neighbor or change ospf interface types, I didnt have to do anything in this task and by only enabling ospf my neighbors came up.
R5
interface Serial1/0.125 multipoint
ip ospf priority 255
Rest of the configs were typical ones just enabling ospf over fr links. Only issue is when R5 goes down it wont prempt to become DR again. Also I read above that people changed the ospf network type when it is peering even without it.. as spokes has broadcast keyword on FR link pointing to R5, so it will peer on default non-broadcast as thats the default type for FR multpoint interface.
Please comment and correct me if im wrong
Omair
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