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HELP... Can't PING switch or pc from router (& vice versa)

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  • 1.  HELP... Can't PING switch or pc from router (& vice versa)

    Posted Mar 08, 2023 12:15 PM

    Hello All,

    I am fairly new to networking. I am trying to setup a simple topology that includes 1 - CORE, 1 - DISTCORE, 1 SWITCH, 1 end device (PC).

    I am using OSPF for the routing on the L3 switches. I can ping from either router to the other just fine, however, I can not ping from the SWITCH to any of the routers, but I CAN ping from the SWITCH to the end device (PC). I am losing my route connection at the SWITCH. HELP!

    I guess I need to create a static IP route from the CORE > DISTCORE > L2 SWITCH > END DEVICE (PC)? I apologize for the ignorance.

    CORE - config
    ssh server vrf mgmt
    vlan 1,10,999,3024
    trunk-dynamic-vlan-include
    interface mgmt
        no shutdown
        ip dhcp
    interface 1/1/1
        no shutdown
        no routing
        vlan access 3024
    interface vlan 3024
        ip address 10.254.253.25/30
        ip ospf 1 area 0.0.0.0
    ip route 10.1.0.0/16 10.254.243.3  <-- I am not sure this is even correct. I found this on another config.
    !
    !
    !
    !
    !
    router ospf 1
        router-id 1.1.1.1
        area 0.0.0.0
        area 0.0.0.1
        area 0.0.0.2
        area 0.0.0.3
    https-server vrf mgmt

    DISTCORE - config
    ssh server vrf mgmt
    vlan 1,10,999,3024
    trunk-dynamic-vlan-include
    interface mgmt
        no shutdown
        ip dhcp
    interface 1/1/1
        no shutdown
        no routing
        vlan trunk native 999
        vlan trunk allowed 1,10,999,3024
    interface 1/1/2
        no shutdown
        no routing
        vlan access 3024
    interface vlan 3024
        ip address 10.254.253.26/30
        ip ospf 1 area 0.0.0.0
    !
    !
    !
    !
    !
    router ospf 1
        router-id 2.2.2.2
        area 0.0.0.0
        area 0.0.0.0 range 10.55.0.0/16 type inter-area
    https-server vrf mgmt

    SWITCH - config
    ssh server vrf mgmt
    vlan 1,10,999
    trunk-dynamic-vlan-include
    interface mgmt
        no shutdown
        ip dhcp
    interface 1/1/2
        no shutdown
        no routing
        vlan trunk native 999
        vlan trunk allowed all
    interface 1/1/6
        no shutdown
        no routing
        vlan access 10
    interface vlan 10
        ip address 10.1.1.254/24
    interface vlan 999
        description TRUNK
    ip route 0.0.0.0/0 10.55.100.1

    PC - config
    10.1.1.10 255.255.255.0 gateway 10.1.1.254



  • 2.  RE: HELP... Can't PING switch or pc from router (& vice versa)

    EMPLOYEE
    Posted Mar 08, 2023 05:22 PM

    The easiest way is to start pinging from the PC to the destination (please specify), if that fails ping its default gateway (10.1.1.254)

    if this works then go to the switch and ping the same destination but from a source ip (10.1.1.254 ) that was closest for the PC IP address.

    Then use this step by step approach to find out where the break is. at that point check the routing table for the missing route



    ------------------------------
    If my post was useful accept solution and/or give kudos.
    Any opinions expressed here are solely my own and not necessarily that of HPE or Aruba.
    ------------------------------

    Original Message