Solved

IP address questions

Posted on 2011-11-11
685 Views
Last Modified: 2012-05-12
Noticed something strange today on our network.  If I ping and IP address of 192.168.200.50, I get a destination unreachable message.  If I ping address 192.168.200.050, it pings without a problem.  See Screen Shot below:

Pinging 192.168.200.50 with 32 bytes of data:
Reply from 192.168.200.40: Destination host unreachable.
Reply from 192.168.200.40: Destination host unreachable.
Reply from 192.168.200.40: Destination host unreachable.
Reply from 192.168.200.40: Destination host unreachable.

Ping statistics for 192.168.200.50:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

C:\>ping 192.168.200.050

Pinging 192.168.200.40 with 32 bytes of data:
Reply from 192.168.200.40: bytes=32 time<1ms TTL=128
Reply from 192.168.200.40: bytes=32 time<1ms TTL=128
Reply from 192.168.200.40: bytes=32 time<1ms TTL=128
Reply from 192.168.200.40: bytes=32 time<1ms TTL=128

Ping statistics for 192.168.200.40:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 0ms, Maximum = 0ms, Average = 0ms

Another thing that is odd is that any IP address with the number 8 or 9 in the address gives a message to please check name and try again.  I have tried all combinations of numbers like 8, 18, 9, 19, 88, 99, etc...
See some examples below:

C:\>ping 192.168.200.080
Ping request could not find host 192.168.200.080. Please check the name and try
again.

C:\>ping 192.168.200.018
Ping request could not find host 192.168.200.018. Please check the name and try
again.

C:\>ping 192.168.200.019
Ping request could not find host 192.168.200.019. Please check the name and try
again.

0
Question by:sfletcher1959
    4 Comments
     
    LVL 21

    Expert Comment

    by:Joseph Moody
    Is your IP 192.168.200.40? The reply is coming from that device. Chances are - .50 is still offline
    0
     

    Author Comment

    by:sfletcher1959
    Good Catch JMoody10!  I was on 200.40.  Any idea why the IP address that have an 8 or 9 won't ping?
    0
     
    LVL 21

    Expert Comment

    by:Joseph Moody
    Do those machines actually exist?
    0
     
    LVL 67

    Accepted Solution

    by:
    That is a cmd prompt issue. Any number starting with a zero is octal, so 050 = 40. 0x50 would be 80 (5x16, hexadecimal interpretation). You can see that with

    set /a 0x50
    set /a 050

    That also explains why you can't use 08 or 09 - they are invalid as octal digits.
    0

    Write Comment

    Please enter a first name

    Please enter a last name

    We will never share this with anyone. Privacy Policy Terms of Use

    Featured Post

    Course: Foundations of Front-End Development

    Jump-start a lucrative career in front-end web development, with zero previous coding experience required. This course covers the basic programming concepts and languages required for creating engaging websites from scratch.

    There are two modes of restricted groups GPOs. Replacing mode:   Additive mode:   How do they work? Replacing mode: Everything (users, groups, computers) that is member of the local administrators group will be cleared out. After th…
    I know all systems administrator at some time or another has had to create a script to copy file from a server share to a desktop. Well now there is an easy way to do this in Group Policy. Using Group policy preferences is not hard. The first thing …
    This tutorial will walk an individual through the process of transferring the five major, necessary Active Directory Roles, commonly referred to as the FSMO roles from a Windows Server 2008 domain controller to a Windows Server 2012 domain controlle…
    This tutorial will walk an individual through the process of configuring their Windows Server 2012 domain controller to synchronize its time with a trusted, external resource. Use Google, Bing, or other preferred search engine to locate trusted NTP …

    678 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    32 Experts available now in Live!

    Get 1:1 Help Now