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Ping Delay

Weird issue/question:

When pinging from XP machines to device on local subnet, same switch, within 1 router, all response times are <1ms.  However, on a vista PC, when I ping the same devices on local subnet, same switch, i see that EVERY time, the first reply is 18ms, but the remaining are always <1ms  Is this some type of bug, or why is it the first ping has such a delay?  Also, if I do infinite -t switch, same thing, first ping always a delay, but the remaining pings are <1ms.  What gives?
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fireguy1125
Asked:
fireguy1125
1 Solution
 
hunartCommented:
Can you do a tracert on both systems and post the output.
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roger_karamCommented:
Try disabling IPv6. Default is enabled on Vista and Win 7.
-RK
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asiduCommented:
It could be due firewall or antivirus. Please check a similar question

http://www.experts-exchange.com/Networking/Misc/Q_26858338.html?cid=1135#a35026228
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fireguy1125Author Commented:
Disabled Symantec Endpoint Protection, and resolved issue.  Thank you.
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