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Unable to ping Oracle virtual box Host to Guest

I have installed 3 guest server in Oracle Vbox on Host (nn1).(Guest servers Dn1,Dn2 & Dn3)and Host is nn1 .

I can ping nn1 from these Guest's but i'm unable to ping Guests from host nn1. When I'm trying to ping guests raising below error from Host.Please let me know a solution to make a connection with guests from host.Thanks in advance.

 [root@nn1 ~]# ping Dn1
    PING Dn1 (10.88.12.5) 56(84) bytes of data.
    From 10.88.12.0 icmp_seq=1 Destination Host Unreachable  
    From 10.88.12.0 icmp_seq=2 Destination Host Unreachable
    From 10.88.12.0 icmp_seq=3 Destination Host Unreachable
    From 10.88.12.0 icmp_seq=5 Destination Host Unreachable
    From 10.88.12.0 icmp_seq=6 Destination Host Unreachable
    From 10.88.12.0 icmp_seq=7 Destination Host Unreachable
    From 10.88.12.0 icmp_seq=9 Destination Host Unreachable
    From 10.88.12.0 icmp_seq=10 Destination Host Unreachable
    From 10.88.12.0 icmp_seq=11 Destination Host Unreachable
    From 10.88.12.0 icmp_seq=13 Destination Host Unreachable
    From 10.88.12.0 icmp_seq=14 Destination Host Unreachable


    [root@nn1 ~]# ping Dn2
    PING Dn2 (10.88.13.5) 56(84) bytes of data.
    From 10.88.12.0 icmp_seq=1 Destination Host Unreachable
    From 10.88.12.0 icmp_seq=2 Destination Host Unreachable
    From 10.88.12.0 icmp_seq=3 Destination Host Unreachable
    From 10.88.12.0 icmp_seq=5 Destination Host Unreachable
    From 10.88.12.0 icmp_seq=6 Destination Host Unreachable
    From 10.88.12.0 icmp_seq=7 Destination Host Unreachable
    From 10.88.12.0 icmp_seq=10 Destination Host Unreachable
    From 10.88.12.0 icmp_seq=11 Destination Host Unreachable
    From 10.88.12.0 icmp_seq=13 Destination Host Unreachable
    From 10.88.12.0 icmp_seq=14 Destination Host Unreachable
    From 10.88.12.0 icmp_seq=15 Destination Host Unreachable

   [root@nn1 ~]# ping Dn3
    PING Dn3 (10.88.14.5) 56(84) bytes of data.
    From 10.88.12.0 icmp_seq=2 Destination Host Unreachable
    From 10.88.12.0 icmp_seq=3 Destination Host Unreachable
    From 10.88.12.0 icmp_seq=4 Destination Host Unreachable
    From 10.88.12.0 icmp_seq=5 Destination Host Unreachable
    From 10.88.12.0 icmp_seq=6 Destination Host Unreachable
    From 10.88.12.0 icmp_seq=7 Destination Host Unreachable
    From 10.88.12.0 icmp_seq=9 Destination Host Unreachable
    From 10.88.12.0 icmp_seq=10 Destination Host Unreachable
    From 10.88.12.0 icmp_seq=11 Destination Host Unreachable
Solution

  • The problem is duplicate routing definitions.

    Delete vboxnet0 to remove the route and the NIC so packets won't be "trapped".