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Thread: *TechLabs* CCNA

  1. Junior Member
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    #51

    Default thanks a lot to the moderator

    hi,
    I am a MS student who has been preparing for CCNA for some time now and have my test in a couple of days from now. I have been comming back to this forum for guidance and tutorials. it has been a very fruitfull experiance comming here and learning from some very excellent tutorials i thank the moderator for his invisible help (though sometimes vey direct too..) in helping me and others in going forward with our CCNA objectives.
    Thanks a lot and keep up the good work.
    upigrad
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  3. Senior Member
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    #52

    Default Re: still not clear for me

    Quote Originally Posted by XCommand
    I read this thread several times but it is still not clear for me.I also read "My router Lab" thread.

    Here's is what I understood till now;
    -Serial ports are used to connect the routers to eachother via back-to-back cable.I am giving the same example in techexams.net's Hardware LAB.

    2 routers (RouterA and RouterB)

    S0 of RouterA connects to S0 of RouterB with DB60 back-to-back cable.
    For AUI ports we plug a transiever for both routers.From transievers a straight cable directly to ethernet cards of 2 PC's.
    E1 of RouterA goes to Host A
    E2 of RouterB goes to Host B.

    And now the part which is not clear
    Console port is used to configure the router.From console port of RouterA comes and goes to the serial com port of HostA.Ok,everything is ok.Now we can configure the RouterA from HostA via telnet.
    But how we can configure the RouterB from HostB or from HostA?

    There isn't any console cable between RouterB and HostB.
    Ok I understand there is a back-to-back cable between routers but how will we say the name of the ports for RouterB?
    What is the configuration?

    Thank you
    This is probably a bit overdue, but I figured I'd make my first post by helping someone out. In order to configure RouterB, you would need to connect a rollover cable to the console port on RouterB. You could connect the other end to either HostA or HostB....it doesn't matter. I hope that helps.

    BTW, I'm taking classes right now to prepare for CCNA, so I'm no guru, but learning quickly.
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    #53
    I'm using RouterSim Network Visualizer 5.0 and when I try to run the command 'clock rate 64000' on RouterB , int s0/0, to set it as DCE, it tells me this command can only be run on a DCE interface. What is wrong? Please help me. Thanks.
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  5. Senior Member
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    #54
    This means that ur router isn't configured to provide clock rate on that if.

    Issue a show controllers command to see the right if.
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  6. Johan Hiemstra Forum Admin Webmaster's Avatar
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    #55
    First let me apologize for the lack of new TechLabs (and other CCNA material...) lately. The Cisco sections and forums are actually more popular than our CompTIA and Microsoft section, so it deserves some new content. Starting with three new TechLabs. Here's the first one:

    Switch Configuration Basics
    http://rejsy-morskie.com/?page=techlabs/cc...h-basics.shtml
    It covers some essential and very basic configuration tasks on a Cisco Catalyst 2950-12 Switch, but it applies to other series/models as well.

    The following two TechLabs will cover switchport configuration and VLANs.

    I hope you will find them useful, even if you don't have a switch to practice it on. We'll be providing a neat way to practice the switch command soon (month or two). If you have and comments or suggestions feel free to post them as a reply to this topic.

    I also finally fixed the diagram in the frame relay lab and cleaned up this thread a bit.

    Johan
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  7. Johan Hiemstra Forum Admin Webmaster's Avatar
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    #56
    I just realized I forgot a small section, causing the lab results to be different than they should. Will update it in a couple of minutes... done.
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  8. Member
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    #57
    Thank you for the new lab Johan, you're my hero!
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  9. Senior Member bighornsheep's Avatar
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    #58
    In the frame relay techlab, it says that it's using the 2520 as the FR switch. If another 2500 series router is used instead, does that mean only 2 other routers can connect to it because there're only 2 serial ports on other models? Also, on the 2520, how do you decide which to put on the sync serial, and which to put on the async serial port? And what is the difference?
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  10. Senior Member kadshah's Avatar
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    #59
    The configuring frame Relay section was very helpful since I don't have
    3 routers in my lab. I already understand the concept of frame relay
    from reading Todd's book but your techlab helped me to easily organize the frame Relay commands in my head. Excellent work!
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  11. Junior Member
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    #60

    Default LABS!!!

    Very nice labs, I would definiatly like to see more of these. I definatly think you need to add VTP, and how to configure VLANS at lease the basics, being that your switch lab seems a little too basic. Wonderful frame-relay though. Excellent
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  12. Johan Hiemstra Forum Admin Webmaster's Avatar
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    #61
    Thanks for the feedback. There will be a follow up lab for the switches, covering several switchport and VLAN configurating related topics. I'll probably finish it before the end of this month.
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  13. Member
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    #62
    I've been using this forum for knowledge for the past two months so best say thanks .

    Been a great help in setting up my lab and troubleshooting.
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  14. Junior Member
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    #63

    Default new user

    hi there, I m a new user of this forum. Indeed this forum helped me alot. Hopefully it will remain helping me on all the way in all the time. Absolutely nice work!
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  15. fl
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    #64

    Default Re: *TechLabs* CCNA

    Quote Originally Posted by Webmaster
    Below you will find our a list of our current CCNA TechLabs. ....

    Switch Configuration Basics *new*
    Just wanted to let you know that on http://rejsy-morskie.com/?page=citechnotes.shtml the link to "Switch Configuration Basics" points to the wrong URL! The one posted above works.
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  16. Johan Hiemstra Forum Admin Webmaster's Avatar
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    #65
    Fixed. Thanks for letting me know!
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  17. Junior Member
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    #66
    Hi there,

    Thank you for this perfect Frame Relay lab. I've done a FR lab in my university this morning, and I must admit that nothing was explained, and I've was a bit confused.

    I have some question though :
    - You list the IP mappings, assuming that they are correctly learned via Inverse ARP. Does IARP always work ? In which cases should we enter static IP mappings ?
    - You are using a single router as an FR switch. Is it equivalent to two routers connected via a back to back X.21 cable and using NNI interfaces ? Then, defining DLCI forwarding for each.
    - What about using OSPF or RIP over FR ? My lab technical sheet says using "no keep-alive" (interface) and "ip ospf network broadcast" (interface) [for OSPF). Why ?

    Thank you !
    Best regards,
    Florian
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  18. Senior Member
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    #67
    Hey these are great!!!
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  19. Johan Hiemstra Forum Admin Webmaster's Avatar
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    #68
    I just uploaded a new TechLab covering Cisco Discovery Protocol in detail. I already wrote a TechNotes for CDP a long time ago, but this one is a bit more extensive and obviously from a more practical angle.

    Cisco Discovery Protocol TechLab

    You don't need to use the exact same network setup as I did, and command output may vary slightly because of IOS differences. I wrote this lab as part of something else I hope to release soon and will include many more labs.

    Johan
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    #69
    I attempted to do the RIP Techlab using a 2610 and a 2620 router and I'm having trouble with the serial connection.

    I followed the lab here: http://rejsy-morskie.com/?page=technotes/ccna/lab_1_rip.shtml. I have router A connected to router B with a DCE/DTE crossover cable. With this configuration and addressing scheme, I can't ping from router A to router B. I can ping from Host A to the serial interface on Router A and from Host B to the serial interface on Router B.

    When I do a show ip route, the routing table shows a direct connection to the other router so that leads me to believe its not a physical connection issue. I.E. Router A shows network 192.168.11.0 connected, 192.168.22.0 connected and 192.168.22.6 connected. On both routers I get up and up.

    I've double and triple checked to make sure that the router that is connected to the DCE end of the cable has the clock rate set on the serial interface, I've tried to change the address scheme to use a /30 network address on the serial link.

    At this point I'm just not sure what to do to get it to work. Any advice? Anyone see what i'm doing wrong?
    Thanks in advance for any help.
    Bob
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    #70
    Because of what Router A shows I think the problem is that you haven't configured RIP on router B.

    When you do the sh ip route command on router A you should have 192.168.11.0 and 192.168.22.0 as directly connected a 192.168.33.0 as rip.

    something like this:
    C 192.168.11.0
    C 192.168.22.0
    R 192.168.33.0

    So I suggest you entering this on router B:

    RouterB(config)#router rip
    RouterB(config-router)#version 2
    RouterB(config-router)#network 192.168.22.0
    RouterB(config-router)#network 192.168.33.0
    RouterB(config-router)#end

    If you're using the subnet mask /30 there shouldn't be any problem since Rip Version 2 is classless.
    But the original one in the lab works perfectly.
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  22. Junior Member
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    #71
    Quote Originally Posted by pabloCr84
    Because of what Router A shows I think the problem is that you haven't configured RIP on router B.

    When you do the sh ip route command on router A you should have 192.168.11.0 and 192.168.22.0 as directly connected a 192.168.33.0 as rip.

    something like this:
    C 192.168.11.0
    C 192.168.22.0
    R 192.168.33.0

    So I suggest you entering this on router B:

    RouterB(config)#router rip
    RouterB(config-router)#version 2
    RouterB(config-router)#network 192.168.22.0
    RouterB(config-router)#network 192.168.33.0
    RouterB(config-router)#end

    If you're using the subnet mask /30 there shouldn't be any problem since Rip Version 2 is classless.
    But the original one in the lab works perfectly.
    Thanks for your reply.

    I did have RIP configured on Router B, and i did expect an output like you showed when I do a "show ip route". I just wiped out both routers and reconfigurd again for the 3rd time and now it works, so obviously I did something wrong that I couldn't see the first time around.

    Before I reconfigured the result of the show ip route on Router_A was:

    C 192.168.11.0/24 is directly connected, ethernet 0/0
    C 192.168.22.6/32 is directly connected, serial 1/0
    C 192.168.22.0/24 is dorectly connected, serial 1/0

    but I had no RIP entry.

    On Router_B the show ip route displayed:

    C 192.168.22.5/32 is directly connected, serial 0/0
    C 192.168.22.0/24 is directly connected, serial 0/0
    C 192.168.33.0/24 is directly connected, ethernet 0/0
    and again, no RIP entry.

    But as I said earlier, after reconfiguring again it is working. I appreciate you're trying to help. I'm sure I'll have more questions as I continue.
    Bob
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  23. Junior Member
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    #72


    A big thanks for all this TechLabs. They are really useful.
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    #73

    Default Access to sim

    Quote Originally Posted by Webmaster
    According to our site's traffic statistics, the first "TechLab" is currently being visited by more people than any of our TechNotes or practice exams... still I have had no comments here... Should I create more of these? Should I add or change anything?
    Hi Johan,

    Great work ! btw, how do i get access to one of available router simulator around here? I want to have a chance of learning BGP, OSPF, bandwidth controlling etc... Thx in advance

    -YAL-
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  25. Junior Member
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    #74
    This is a great resource!

    I've just bidded for two 2501 on eBay, and once (if) I get them, I'll be following the rest of the instructions to get started.

    Thanks again for the time and effort you put into this.
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  26. Senior Member phantasm's Avatar
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    #75
    Nice work on the labs!! Any chance of seeing any Inter-VLN or Router on a Stick type labs? I have a lab at home but use Pakcet Trace 4.1 at work to study in my spare time.
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