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  1. Senior Member
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    #1

    Default I can't ping between Routers in the same LAN....

    packet.jpg

    So I have a packet tracer lab I'm working on and I can only ping between the routers on each side of my switches, not across. All four routers are on the same network. There are 4 switches setup in between the 4 routers.

    R1 can ping R2 vice versa, R3 can ping R4 vice versa.

    Here is the config for each router:

    R1#show int f0/0
    FastEthernet0/0 is up, line protocol is up (connected)
    Hardware is Lance, address is 0007.ec1a.d401 (bia 0007.ec1a.d401)
    Internet address is 150.101.45.1/29
    MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
    reliability 255/255, txload 1/255, rxload 1/255
    Encapsulation ARPA, loopback not set
    ARP type: ARPA, ARP Timeout 04:00:00,
    Last input 00:00:08, output 00:00:05, output hang never
    Last clearing of "show interface" counters never
    Input queue: 0/75/0 (size/max/drops); Total output drops: 0
    Queueing strategy: fifo
    Output queue :0/40 (size/max)
    5 minute input rate 0 bits/sec, 0 packets/sec
    5 minute output rate 0 bits/sec, 0 packets/sec
    9 packets input, 1152 bytes, 0 no buffer
    Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
    0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
    0 input packets with dribble condition detected
    9 packets output, 1152 bytes, 0 underruns
    0 output errors, 0 collisions, 2 interface resets
    0 babbles, 0 late collision, 0 deferred
    0 lost carrier, 0 no carrier
    0 output buffer failures, 0 output buffers swapped out





    R2#sho int f0/0
    FastEthernet0/0 is up, line protocol is up (connected)
    Hardware is Lance, address is 0001.c9a1.d601 (bia 0001.c9a1.d601)
    Internet address is 150.101.45.2/29
    MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
    reliability 255/255, txload 1/255, rxload 1/255
    Encapsulation ARPA, loopback not set
    ARP type: ARPA, ARP Timeout 04:00:00,
    Last input 00:00:08, output 00:00:05, output hang never
    Last clearing of "show interface" counters never
    Input queue: 0/75/0 (size/max/drops); Total output drops: 0
    Queueing strategy: fifo
    Output queue :0/40 (size/max)
    5 minute input rate 0 bits/sec, 0 packets/sec
    5 minute output rate 0 bits/sec, 0 packets/sec
    9 packets input, 1152 bytes, 0 no buffer
    Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
    0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
    0 input packets with dribble condition detected
    9 packets output, 1152 bytes, 0 underruns
    0 output errors, 0 collisions, 2 interface resets
    0 babbles, 0 late collision, 0 deferred
    0 lost carrier, 0 no carrier
    0 output buffer failures, 0 output buffers swapped out



    R3#sho int f0/0
    FastEthernet0/0 is up, line protocol is up (connected)
    Hardware is Lance, address is 0001.42ad.5a01 (bia 0001.42ad.5a01)
    Internet address is 150.101.45.3/29
    MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
    reliability 255/255, txload 1/255, rxload 1/255
    Encapsulation ARPA, loopback not set
    ARP type: ARPA, ARP Timeout 04:00:00,
    Last input 00:00:08, output 00:00:05, output hang never
    Last clearing of "show interface" counters never
    Input queue: 0/75/0 (size/max/drops); Total output drops: 0
    Queueing strategy: fifo
    Output queue :0/40 (size/max)
    5 minute input rate 0 bits/sec, 0 packets/sec
    5 minute output rate 0 bits/sec, 0 packets/sec
    28 packets input, 3584 bytes, 0 no buffer
    Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
    0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
    0 input packets with dribble condition detected
    29 packets output, 3712 bytes, 0 underruns
    0 output errors, 0 collisions, 1 interface resets
    0 babbles, 0 late collision, 0 deferred
    0 lost carrier, 0 no carrier
    0 output buffer failures, 0 output buffers swapped out



    R4#sho int f0/0
    FastEthernet0/0 is up, line protocol is up (connected)
    Hardware is Lance, address is 0060.47ad.7501 (bia 0060.47ad.7501)
    Internet address is 150.101.45.4/29
    MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
    reliability 255/255, txload 1/255, rxload 1/255
    Encapsulation ARPA, loopback not set
    ARP type: ARPA, ARP Timeout 04:00:00,
    Last input 00:00:08, output 00:00:05, output hang never
    Last clearing of "show interface" counters never
    Input queue: 0/75/0 (size/max/drops); Total output drops: 0
    Queueing strategy: fifo
    Output queue :0/40 (size/max)
    5 minute input rate 0 bits/sec, 0 packets/sec
    5 minute output rate 0 bits/sec, 0 packets/sec
    29 packets input, 3712 bytes, 0 no buffer
    Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
    0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
    0 input packets with dribble condition detected
    28 packets output, 3584 bytes, 0 underruns
    0 output errors, 0 collisions, 2 interface resets
    0 babbles, 0 late collision, 0 deferred
    0 lost carrier, 0 no carrier
    0 output buffer failures, 0 output buffers swapped out
    Last edited by labscloud; 07-26-2017 at 03:55 PM.
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  3. Senior Member
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    #2
    Sometimes packet tracer won't work even when things are set up correctly. Try doing a whole new lab and see what happens.
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    #3
    Can you post the running config for each router?
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    #4
    ... or better still, make the CPT file available via a file share. e.g Dropbox.

    The Red Lights come to my attention...
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  6. Senior Member
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    #5
    I'm not pinging out those interfaces though, I'm only pinging from the inside routers across the switches, not the serial link or going outwards. I'll add a dropbox file.
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    #6
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    #7
    Set SW3 FA0/24 and SW4 FA0/24 to VLAN150.
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  9. Senior Member CryptoQue's Avatar
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    #8
    Can you provide what you have configured on switches 1-4 to eliminate layer 2 being the root cause of your issue?
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  10. Senior Member
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    #9
    I got it guys! I didn't have the F0/24 ports on SW3 & SW4 configured as access ports with access to vlan 150.

    So I added:

    #switchport mode access
    #switchport access vlan 150

    I just assumed it was a L3 issue and not L2.

    That did the trick on both switches!
    Last edited by labscloud; 07-26-2017 at 06:10 PM.
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  11. Senior Member CryptoQue's Avatar
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    #10
    Glad you figured it out.
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    #11
    Thanks for posting the CPT file. I enjoyed the diagnostic challenge: It looks as if we both got there at the same time.
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  13. Senior Member
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    #12
    Thanks man, it only took 2 minutes after pulling up the switches running configs and I compared them to SW1&2 and BOOM, there it was!
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    #13

    Arrow WANT TO PASS A+ Cert 901 and 902 first try?!

    If you want to pass A+ Cert please Text me at 443-680-7474 (NO CALLS!!!!!) Please Text name and which version you would like.
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    #14
    yeah don't call that number
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    #15
    If you're wise, you won't text it either!
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