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  1. Junior Member
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    Aug 2017
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    #1

    Question CISCO PCKT Networking

    Hey, I need help! Urgent! ):

    There seems to be a problem when i tried to ping a computer from another. Currently in my topology, I connected two routers together, one switch to one router, and one PC to one switch. The ip addresses are all okay, none of them overlaps however, I don't understand why I cannot ping the other computer. When I tested to ping the G port of the router, it was still okay. When I moved on to the S port though, I wasn't able to pass it through. Does anyone know why?

    These are the ip address that I used:

    pc1
    ip 139.40.0.2 (255.255.248.0) gateway = 139.40.28.33
    router1
    gport 139.40.0.1 (255.255.248.0) s0/0/0 139.40.28.33
    pc2
    ip 139.40.8.2 (255.255.248.0) gateway = 139.40.28.34
    router2
    gport 139.40.8.1 (255.255.248.0) s0/0/0 139.40.28.34
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  3. Junior Member
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    #2
    wait sorry, I managed to ping the s ports but when i tried to ping the opposite router, it doesnt work):
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  4. Senior Member dontstop's Avatar
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    CompTIA IT Fundamentals, CCENT, CCNA:R&S, BInfoTech
    #3
    A quick guess without looking at the rest of your configuration would be that you've got no routing protocol or static routes configured... correct? Run a "show ip route" on router1, do you see 139.40.8.0/21? Router1 will only know about the directly connected (configured networks) of 139.40.0.0/21 & 139.40.24.0/21. Because the 139.40.8.0 isn't directly connected to Router1 nor is 139.40.0.0 directly connected to Router2 they will need a routing protocol to learn about those networks connected to neighbouring routers.

    You'll either need to configure a static route or configure a dynamic routing protocol like RIP, EIGRP or OSPF. The simplest way to get connectivity would be static routes like this:

    router1:
    ip route 139.40.8.0 255.255.248.0 139.40.28.34

    router 2:
    ip route 139.40.0.0 255.255.248.0 139.40.28.33

    Give that a try
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  5. Junior Member
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    #4
    I tried as you suggested but I still couldnt ping one computer to another
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  6. Senior Member dontstop's Avatar
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    #5
    Could you post your packet tracer configuration as a pkt?
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  7. Junior Member
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    Aug 2017
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    #6
    https://drive.google.com/file/d/0B6N...ew?usp=sharing

    click on the link. I've saved it to drive
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  8. Junior Member
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    May 2017
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    Certifications
    CCENT , CCNA:R&S
    #7
    Seems like the file doesn't exist anymore.
    Could you share the packet tracer file so we can have a look your topology
    SCRAP that i manage to download the file it was just me hehe
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  9. Senior Member Mr.Robot255's Avatar
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    #8
    Have you checked default gateways on the PCs

    not sure if you uploaded the correct lab but the lab you shared is 5 router 5 switches + PCs

    i didn't check it all but none of the PCs have default gateways i stopped there.
    Last edited by Mr.Robot255; 08-11-2017 at 04:11 PM.
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  10. Junior Member
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    #9
    Like Mr.Robot said PCs haven't got the Default gateway and routing tables need updating as they do not contain routes to all subnets.
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