Re: Help needed with intermittent internet


"Warren H" <wholzem@xxxxxxxxxxx> wrote in message
news:nPGdnb9qNML4y6PbnZ2dnUVZ_hynnZ2d@xxxxxxxxxxxxxx
w_tom wrote:
Comcast on their end only sees their connection to line amplifiers.
That number only says whether everyone is getting connected. It says
zero about a connection only on your end.

Not true. At any given moment, they can tell how many modems are up (and
down) on each node, and which ones they are. This is at the IP level.


Again, your problem is classic of intermittents which is why a
provider should provide S/N ratios on your modem that you can
monitor. Did the Comcast tech look at signal strength from modem
while standing in the room - or instead only with his measuring
equipment? Modem can report valid and useful number. Their equipment
can only report what modem 'might' see - and not from their equipment
on other side of amplifiers.

Again, not so. Their monitoring equipment can tell what each modem is
reporting.


Remember a trend among techs. It was never a problem elsewhere;
therefore it is not your problem.

Listed were numerous things to perform. Did they confirm above
listed connections? Your post did not reply to what can create a
significant problem and can only be identified by visual inspection..
And yes, many techs do not appreciate the engineering even in simple
earthing. Often because it did not cause a problem elsewhere;
therefore is not your problem. Did they perform the 'reroute' test?
If not, then why not? Is existing cable good only because they know
it must be good?

Meanwhile, what did you do to verify a problem does not exist on
subscriber side of modem? For example, as your computer pings the
modem constantly, what happens to ping (the numbers) both when
connections are working and not?.

Again, their levels can always look good. But only valid number is
S/N number read directly from your modem. Any only valid number is
both when connection is working and has failed. That number must be
measured on your end of wire and is only useful if read directly by
modem. That number read anywhere else says nothing about your unique
connection.

What the agents on the phone see is what the modem is reporting. It is not
a measurement from their end. It is the numbers that the modem itself
reports back.


Your post implies a "we have done everything and nothing is wrong"
attitude. One indication of a bad attitude is no numbers taken when
system is both working AND while failure is ongoing. But again, who
confirmed the earthing connection? I don't see the results of an
inspection so critical that I posted it. Who monitored the S/N
numbers both when modem is working AND when a failure occurs? And who
did same thing using ping from subscriber side - and collected numbers
from that ping both when connections are good and bad? Nothing in
that previous post can be ignored if the problem is to be solved.
Nothing in the last post says to me that technicians are really
looking for a problem.

This whole idea that it has to be a grounding problem is quite a
long-shot, and really doesn't fit with the symptoms reported to this
point. However since we're all starting to run out of ideas, and practical
isolation troubleshooting hasn't been very fruitful, he might as well
start checking random long-shots.

I also don't detect any bad attitude on his part. What I see is that he
tried everything he could think of (which is different from everything),
and still has not found the problem, and is therefore trying to backtrack,
and look for things that may have missed. Hardly the "bad attitude" you're
attributing to him. If anything, his attitude is better than most of the
people who post problems here.


Thank you, Warren, but I do not believe he meant that I have a bad attitude.
My reading of his post indicates he is ascribing that attitude to the
Comcast folks. But, maybe not ; ))

This problem is as perplexing as I've ever seen, and I've been around
networks 5-6 days a week for the past 7 years. At this point, several facts
stand out:

- the internet is down every morning
- when I cannot ping the gateway address remotely, the modem shows online in
Comcast's equipment and their constant ping shows no or very little packet
loss
- when they "poll" the modem with their software, as I'm on the phone with
them, the Netgear wakes up and in mid execution my pings start getting
replies and internet service resumes (this one really makes me shake my
head)
- within the past couple of months, the client's domain has turned up on
some ISPs blocked list as possible spammers

I'm now a bit confused as to what information I've included in what posts,
but I can elaborate on that last fact if you think it might bear on the
problem.

thank you so much for your willingness to assist.

jm





















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