QUESTION: Unable to ping between Router 1 and Router 3

Discussion in 'Cisco' started by Voitec, Sep 12, 2004.

  1. Voitec

    Voitec Guest

    Hi,

    2nd prob for the day; I'm unable to ping between:
    Router 2 s1 <> Router 3 s0

    Can anyone pls correct the following config if necessary? Are all those
    items listed below needed or can I get rid of certain items? I'm trying to
    have as basic a config as necessary for bare connectivity.

    Many thanks,
    Voitec



    ROUTER 1
    *********
    !
    interface Serial1
    ip address 192.169.15.1 255.255.255.0
    no ip directed-broadcast
    clockrate 64000
    !
    router rip
    network 192.169.0.0
    !
    no ip classless
    ip route 172.17.0.0 255.255.0.0 192.169.15.2
    !


    ROUTER 2
    *********
    !
    interface Serial0
    ip address 172.17.0.1 255.255.0.0
    no ip route-cache
    no ip mroute-cache
    clockrate 64000
    !
    interface Serial1
    ip address 192.169.15.2 255.255.255.0
    no ip route-cache
    no ip mroute-cache
    !
    router rip
    network 172.17.0.0
    network 192.169.0.0
    !
    no ip classless
    !


    ROUTER 3
    *********
    !
    interface Serial0
    ip address 172.17.0.2 255.255.0.0
    no ip mroute-cache
    !
    interface Serial1
    ip address 192.168.15.3 255.255.255.0
    clockrate 64000
    !
    router rip
    network 172.17.0.0
    network 192.169.0.0
    !
    no ip classless
    !
     
    Voitec, Sep 12, 2004
    #1
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  2. Voitec

    PES Guest

    Is router 3 s0 physically connected to r1 s1, or r2 s1? Or is r1 s1
    connected to r2 s1? In any case, I would say it is impossible for you to
    connect 3 point to point connections together, the way your configuration
    suggests.
    What is this static for? Rip should give you the routing table.
     
    PES, Sep 12, 2004
    #2
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  3. Your subject line says the problem is between Router 1 and Router 3, but
    now you're asking about Router 2 and Router 3. Which is it?
    Shouldn't this be "network 192.168.15.0", since your interface has a
    Class C address? Or do you have a 192.169.0.x address on some other
    interface that you're not showing?
     
    Barry Margolin, Sep 12, 2004
    #3
  4. Voitec

    Voitec Guest

    Yes, sorry, just realised the typo.

    I'm unable to ping between Router3 s0 and Router 2 s1, ie. 172.17.0.2 and
    192.169.15.2. This in turn means I cannot ping between 172.17.0.2 and
    192.169.15.1 (which is Router 1 s1).

    Physical connections are as follows:
    Router 3 s0 <> Router 2 s0 (DCE)
    Router 2 s1 <> Router 1 s1 (DCE)

    Apologies for the confusion.
     
    Voitec, Sep 12, 2004
    #4
  5. Voitec

    PES Guest

    After reading Barry's post and this post closer, I realize I previously made
    a mistake. I mistaked 192.169. for 192.168 and thought all three interfaces
    were on the same subnet. I do see an issue with rip. In the network
    statement for rip you have 192.169.0.0. Since 192 is class C, if you had
    typed in 192.169.15.0 (which would be correct), it would show in the config
    file. If you typed 172.17.15.0 in the config, it would show 172.17.0.0. I
    guess what I am trying to say is that rip is configured wrong. You need to
    configure Rip on r2 and r1 with a network of 192.169.15.0. If it still
    doesn't work check to make sure all interfaces are up/up, then post a show
    ip route from each router.
     
    PES, Sep 12, 2004
    #5
  6. Voitec

    mh Guest

    change the network command under the rip routing process for network 192.168.15.0


    router rip
    no network 192.168.0.0
    network 192.168.15.0
    exit
     
    mh, Sep 12, 2004
    #6
  7. Voitec

    Voitec Guest

    That was it! Totally missed the 3rd octet in the 192.169.x.x range when
    configuring RIP.
    Thanks very much :)


     
    Voitec, Sep 12, 2004
    #7
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