Strange Ping Results
Hi,
I have a File Server running Windows Server 2008 Enterprise and for some reason, when I try to ping the
server itself, it gives me this result:
PING FROM THE SERVER ITSELF:
C:\>ping server5
Pinging SERVER5.DOMAIN.COM [::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 FROM THE WORKSTATION:
C:\>ping server5
Pinging SERVER5 [192.168.1.8] with 32 bytes of data:
Reply from 192.168.1.8: bytes=32 time<1ms TTL=128
Reply from 192.168.1.8: bytes=32 time<1ms TTL=128
Reply from 192.168.1.8: bytes=32 time<1ms TTL=128
Reply from 192.168.1.8: bytes=32 time<1ms TTL=128
Has anyone know what is causing this? THanks
AC
July 18th, 2012 11:17am
When done locally and IPV6 is enabled, the local ping will return the loopback IPV6 address:
Reply from ::1: time<1ms
When done from a workstation (where IPV6 is disabled or not priority), ping will return the IPV4 address:
Reply from 192.168.1.8: bytes=32 time<1ms TTL=128.
Totally normal.
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July 18th, 2012 12:12pm
Are addresses of DNS different on SERVER and on WORKSTATION?
Your must put command 'ipconfig /all' on both - SERVER and WORKSTATION. Then find in its output DNS addresses. Is it identical?
Which version of OS is there installed on WORKSTATION?
If Your WORKSTATION has Windows XP (or less), the IPv6 is not installed by default. So, Your WORKSTATION make DNS-query for name server5 A-record only. On Windows 2008 Sever (and Vista) and above the IPv6 is enable by default. So, it make DNS-query for name
server5 records A and AAAA.
July 19th, 2012 2:45am
Hi AC,
Thanks for posting here.
::1 is the loopback address in IPv6. We can perform fix it 50410 in the KB article below in order to let system to use IPv4 first :
How to disable IP version 6 (IPv6) or its specific components in Windows 7, in Windows Vista, in Windows Server 2008 R2, and in Windows Server 2008
http://support.microsoft.com/kb/929852
For more information please refer to the article below:
Chapter 7 - Host Name Resolution
http://technet.microsoft.com/en-us/library/bb727005.aspx
Thanks.
Tiger LiTiger Li
TechNet Community Support
Free Windows Admin Tool Kit Click here and download it now
July 19th, 2012 2:58am
Hi Guys,
Many Thanks for all your reply and the information you all shared.
I applied the fix "50410" as per Tiger Li in all the Servers running 2008 and restarted. It works fine now when pinging itself by server name.
ON SERVER 5 COMMAND PROMPT:
C:\>ping server5
Pinging SERVER5 [192.168.1.8] with 32 bytes of data:
Reply from 192.168.1.8: bytes=32 time<1ms TTL=128
Reply from 192.168.1.8: bytes=32 time<1ms TTL=128
Reply from 192.168.1.8: bytes=32 time<1ms TTL=128
Thanks guys!
AC
July 19th, 2012 5:34am