On 05/25/2015 11:16 PM, Petter Adsen wrote:
On Mon, 25 May 2015 18:53:42 -0700
Gary Roach <gary719_li...@verizon.net> wrote:
On 05/24/2015 12:49 AM, Petter Adsen wrote:
On Sun, 24 May 2015 00:27:02 -0700
Gary Roach <gary719_li...@verizon.net> wrote:
On 05/22/2015 01:19 PM, Bob Proulx wrote:
Darac Marjal wrote:
Gary Roach wrote:
When I start a download, it starts at 50M for the first few
seconds and then drops to 500K to 100K range.
Finally, don't rule out the possibility that your ISP is
throttling you. While you may be synced at 50M and may be able
to transfer at that for short periods (and thus, the ISP can
rightly claim that you have a 50M connection), they could
conceivably throttle your connection in the longer term.
I think this is quite the most likely possibility. I have only
anecdotal reports from friends but what I hear is that often ISPs
allow a full speed burst but then throttle for long term steady
state data transfer. That matches your reported behavior exactly.
This allows customers to run a speed test and have it report full
speed but prevent them from getting that speed for a long download
such as a full system upgrade or a large install ISO image
download. Are you sure your ISP isn't throttling you?
Bob
I wouldn't put anything past those jackasses but am still
attempting to gather information. Would wireshark be a good tool
to do an in depth diagnosis of the problem? I've gotten a little
side tracked with another problem but plan to get back to this in
the next couple of days. Any comments will be appreciated.
If you have shell access to a box somewhere, you can run "iperf" to
get an idea of the performance of the link between you. Obviously,
the closer to you, the better. Take a look at the "--interval"
parameter, so you can see how/if performance degrades over time.
"--dualtest" might also be helpful. There are probably guides out
there on how to get the best results from it, the man page doesn't
really do much except list all the options.
There may be better ways, but this is the one I typically use.
Wireshark would be more suited to analyze the actual traffic, if
you suspect something may be wrong there.
Petter
Thanks for the tips. Don't go away. As you will find in the newest
listings, I have a bigger problem at the moment. I will be back to
this one soon.
Seen and replied to :)
Comment on speed testers. The mostly use UDP packets which will never
detect trashed packets. God I hate big business in this country. What
ever happened to the antitrust laws I grew up with.
iperf will use either TCP or UDP. :)
Petter
Well, I'm back
I used iperf3 as follows:
iperf3 -c iperf.scottlinux.com
The program just hangs. I also tried it with the -R switch with the same
result. I then set up one the other computers on my internal net as a
server (iperf3 -s) and got the following results:
Connecting to host 192.168.1.12, port 5201
[ 4] local 192.168.1.7 port *50916* connected to 192.168.1.12 port 5201
[ ID] Interval Transfer Bandwidth Retr Cwnd
[ 4] 0.00-1.00 sec 104 MBytes 875 Mbits/sec 0 67.9 KBytes
[ 4] 1.00-2.00 sec 105 MBytes 878 Mbits/sec 0 67.9 KBytes
[ 4] 2.00-3.00 sec 105 MBytes 883 Mbits/sec 0 67.9 KBytes
[ 4] 3.00-4.00 sec 106 MBytes 892 Mbits/sec 0 67.9 KBytes
[ 4] 4.00-5.00 sec 104 MBytes 875 Mbits/sec 0 67.9 KBytes
[ 4] 5.00-6.00 sec 104 MBytes 873 Mbits/sec 0 67.9 KBytes
[ 4] 6.00-7.00 sec 104 MBytes 875 Mbits/sec 0 67.9 KBytes
[ 4] 7.00-8.00 sec 104 MBytes 874 Mbits/sec 0 67.9 KBytes
[ 4] 8.00-9.00 sec 105 MBytes 877 Mbits/sec 0 67.9 KBytes
[ 4] 9.00-10.00 sec 104 MBytes 874 Mbits/sec 0 67.9 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth Retr
[ 4] 0.00-10.00 sec 1.02 GBytes 878 Mbits/sec 0 sender
[ 4] 0.00-10.00 sec 1.02 GBytes 877 Mbits/sec
receiver
iperf Done.
My local network seems to be working fine (I tried the -R switch as
well. Same good results). Needless to say, I'm using a 100 Mbyte/second
network.
I am behind a verizon M1424WR rev. I router firewall that has been free
of any "known" transmission trouble before. Could the firewall be the
problem or has scottlinux.com shut down their iperf3 server.
Your comments will be sincerely appreciated.
Gary R