larry price wrote:
Larry's Rough Diagnostic Checklist
for slow internet. AKA "The Internet is slow, fix it."
1. is it DNS?
Hints or links on diagnosing DNS problems?
2. is it the LAN?
Could be... Things were looking totally bogged down (something like
1750ms between hops) so I reset the firewall and things improved -
perhaps just coincidentally. Now around 150ms or so... "Fast" seems to
be in the 0-60 ms range.
The route to www.bikefriday.com was really slow, the route from there
back to me was relatively fast... hmmmmm...
3. is something eating up all the bandwidth on the last hop?
(people doing stupid things like bittorrent with no rate limits,
and LimeWire, etc. can saturate a connection without even knowing,
check traffic stats on your router, or just look at the activity
light, compared to normal)
Unknown - still trying to get a tool in place to monitor that
4. Is there something physically wrong with your connection?
You can diagnose this using traceroute, ping -S , etc. but don't
forget to take a look at the equipment and wiring on your end, Hanging
the telephone wire near a Halogen light, or an electric motor can be a
source of noise, that will cause a higher error rate resulting in
packet retransmission resulting in less bandwidth.
Not sure if this would explain the Fast then all of a sudden Slow, but
there may be some lightswitch somewhere I'm not aware of....
5. if it's your service provider pick up the phone, the more
information you can give them (along the lines of "I'm seeing 3%
packet loss between my router and the far end gateway and my router is
reporting far-end CRC errors") the better.
I'm saving traceroute output to text files on the assumption that I can
give them to someone that can interpret them properly.
Matthew S. Jarvis
IT Manager
Bike Friday - "Performance that Packs."
www.bikefriday.com
541/687-0487 x140
[EMAIL PROTECTED]
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