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Standard User Banger
(eat-sleep-adslguide) Wed 22-Feb-12 20:43:42
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Is ping now useless as a diagnostic.


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As the title really. With most routers giving low priority to pings how can one tell if packet loss is actually loss or just a router on the way just ignoring ping and doing something else? I found an application called tcping.exe which could be a good diagnostic replacement. Thoughts?

Tim
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Administrator MrSaffron
(staff) Wed 22-Feb-12 22:44:22
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Re: Is ping now useless as a diagnostic.


[re: Banger] [link to this post]
 
Ping is still very useful, just takes a little thinking to figure out the real from the fake

Andrew Ferguson, andrew@thinkbroadband.com
www.thinkbroadband.com - formerly known as ADSLguide.org.uk
The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User john2007
(legend) Wed 22-Feb-12 23:54:32
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Re: Is ping now useless as a diagnostic.


[re: Banger] [link to this post]
 
Most PCs will have a utility called traceroute or tracert. That will ping every box along the route. Nothing you can (usefully) do if a particular box is configured not to respond to pings.


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Standard User Chrysalis
(eat-sleep-adslguide) Thu 23-Feb-12 08:15:33
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Re: Is ping now useless as a diagnostic.


[re: Banger] [link to this post]
 
low prority but doesnt make it useless.

generally something performing not at high utilisation and not faulty will respond to pings in a timely manner.

also what is worth thinking about is its icmp thats usually deprioritised not udp, so you can do udp or even tcp pings.

also I rarely see end points have bad ping responses when they working normally, its normally just some intermediate routers that respond slow.

Edited by Chrysalis (Thu 23-Feb-12 08:16:32)

Standard User RobertoS
(sensei) Thu 23-Feb-12 09:15:55
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Re: Is ping now useless as a diagnostic.


[re: Chrysalis] [link to this post]
 
also what is worth thinking about is its icmp thats usually deprioritised not udp, so you can do udp or even tcp pings
I think that's the OP's point. tcping.exe?

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Edited by RobertoS (Thu 23-Feb-12 09:16:13)

Standard User blueacid
(committed) Thu 23-Feb-12 09:52:44
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Re: Is ping now useless as a diagnostic.


[re: Banger] [link to this post]
 
The thing is, if you note that pings are rapid during an off peak period, but they then subsequently soar during a peak period they can help identify congestion. Particularly since busy routers start to drop icmp packets; it can indeed work to your advantage!
Administrator MrSaffron
(staff) Thu 23-Feb-12 10:25:35
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Re: Is ping now useless as a diagnostic.


[re: blueacid] [link to this post]
 
As in it is the pre-cursor to udp and tcp packet delays/drops

Andrew Ferguson, andrew@thinkbroadband.com
www.thinkbroadband.com - formerly known as ADSLguide.org.uk
The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
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