Re: [Nolug] Cox Connection Dropping - Packet Loss Topic

John Souvestre wrote:
> Hi Charles.
>
> No problem. I was busy this morning doing tech support too. I know how it
> gets at times. :-)
>
> Let me put it another way: The http://www.internettrafficreport.com/main.htm
> site is a worthless piece of <>. It provides as much misinformation as
> anything else. It is junk. The people who run it know this yet don't bother
> to fix it. It is the best public example of how NOT to monitor a network that
> I can think of.
>
> A down route should not count as "100% packet loss" because traffic is
> generally routed around it, hence no loss. And why all of those 6% loss
> routes? This alone shows that it is trash.
>
> Try http://internetpulse.net/ for some useful information.
>
> Btw - 1% packet loss on small (default) packets translates into 10 - 20%
> packet loss on 1500 byte packets. Such a connection is very poor in my book.
>
> Btw - One of my all time favorite tools is PingPlotter. It's a combo
> ping/traceroute/history/graphing program. It's only available for Windows,
> however. You can find it at http://www.pingplotter.com.
>

As charles noted, It's really typical now for cable ISP's to make ICMP
very low priority at the CMTS. Which means pings and traceroutes appear
to have packet loss at the first hop. If you run ping plotter, a couple
of varying traceroutes, or mtr (http://freshmeat.net/projects/mtr/ ) the
symptom is seeing only loss at the first hop and not at subsequent hops.
   if you're seeing the loss across all links starting at the first hop,
then perhaps you've got signal problems or routing issues. The next
step would be to look at the CM stats page to see what the modem's
signal levels are and report them to Cox (or just send your CM MAC to
charles and he'll take a look)

This page (from a cox engineer) is informative
http://members.cox.net/coxengr/dslr_help/dslrtool_tools.html

-- 
Scott Harney <scotth@scottharney.com>
"Asking the wrong questions is the leading cause of wrong answers"
gpg key fingerprint=7125 0BD3 8EC4 08D7 321D CEE9 F024 7DA6 0BC7 94E5
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