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Ping localhost results with inconsistent results (but never less than 1ms)

Posted on 2013-06-04
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Last Modified: 2013-06-10
I have come across a few machines in recent times that are getting inconsistent ping reponses from localhost.  this includes machines with brand new installs.

On a windows 8 machine I note the localhost ping is consistently longer than pinging the onsite router.

Anyone have any thoughts on what could be the cause?
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Question by:benfixit
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benfixit earned 0 total points
ID: 39220977
turns out it was malwarebytes.. Standard behavour when monitoring!
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by:Akinsd
ID: 39220993
Are these doamain computers

By localhost, I'm assuming you're running the following command
C:\Users\Owner>ping localhost

Pinging Owner.test.local [::1] with 32 bytes of data:
Reply from ::1: time<1ms
Reply from ::1: time<1ms
Reply from ::1: time<1ms
Reply from ::1: time<1ms

Ping statistics for ::1:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 0ms, Maximum = 0ms, Average = 0ms

Take note of the ip address the name resolves to. If ::1, it's using ipv6.  If 127.0.0.1, its using ipv4.
You can force the ping to either use ipv6 or ipv4 by appending the applicable switch


C:\Users\Owner>ping -4 localhost

Pinging Owner.test.local [127.0.0.1] with 32 bytes of data:
Reply from 127.0.0.1: bytes=32 time<1ms TTL=128
Reply from 127.0.0.1: bytes=32 time<1ms TTL=128
Reply from 127.0.0.1: bytes=32 time<1ms TTL=128
Reply from 127.0.0.1: bytes=32 time<1ms TTL=128

Ping statistics for 127.0.0.1:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 0ms, Maximum = 0ms, Average = 0ms


C:\Users\Owner>ping -6 localhost

Pinging Owner.test.local [::1] with 32 bytes of data:
Reply from ::1: time<1ms
Reply from ::1: time<1ms
Reply from ::1: time<1ms
Reply from ::1: time<1ms

Ping statistics for ::1:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 0ms, Maximum = 0ms, Average = 0ms

I'm adding the following just to shed more light.

Ping response time between two hosts connected to a switch =

1. Processing time for host A to package and send echo requests
2. Time it takes for the packets to get to the switch
3. Time it takes for the switch to process the packet and forward it
4. Time it takes for the packet to get to Host B
5. Time it takes host A to process and reply to the request.
6. Travel time back to Switch
7. Processing time on switch
8. Time it takes to get back to Host A
9. Processing time on Host A
 
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Author Closing Comment

by:benfixit
ID: 39234139
100% correct
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