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Pings are slow, then faster, faster, faster, then slow again, then faster...  And so on in this cycle?

Posted on 2011-09-07
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Last Modified: 2012-05-12
Hi all,

I'm trying to find out what's causing some odd slow downs of our Net access in the office.  One thing I've noticed is that the ping times to one particular device (a PBX) are pretty odd.  They always start off about 35 ms (already very slow for a LAN device), then 34, 33, 32 (more or less like this, sometimes it's not quite such a uniform decrease, but always with a downward trend), until it gets to about 3-4 ms, then bang, back to about 35 again.  Then it repeats once again, 34, 33, 32, etc.

Does this look familiar to anyone?  Does it mean anything?  And why would this one device have such bad ping times anyway?  Tracert confirms it's just a single hop away.

Thanks!
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Question by:paulc2000
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Expert Comment

by:Amit
ID: 36495212
try to restart the switch and see if that makes any difference.
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by:paulc2000
ID: 36495268
everything has been restarted several times, but still it happens...
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Amit earned 500 total points
ID: 36495321
then it could be issue with PBX itself. check with vendor if any hardware issue persist.
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Author Comment

by:paulc2000
ID: 36495665
Thanks, I'll try that.

Is this like anything you've seen before?  Pings start slow, then get faster and faster, then slow, then faster, faster, etc?
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by:Amit
ID: 36495747
I faced the same issue long back. In that case, it was virus, which caused the network choke issue, after scanning and cleaning the virus, everything was back to normal.
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Expert Comment

by:Amit
ID: 36523781
Thanks for the points, i assume it was PBX issue?
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Author Comment

by:paulc2000
ID: 36524154
I don't know yet, I've asked the PBX vendor if they have heard of this before and I'm awaiting a reply.
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