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Using WinMTR/MTR to determine network issues/slow connections/packet loss/high ping times

categoery: Network , Network Issues

When packet loss is occurring during connection to your dedicated server at from an outside network, please note that not all packet loss may be genuine and could possibly be occurring due to conditions on the internet. WinMTR/MTR is a useful tool to see where the problem may lie.

MTR is useful in showing network paths, hops, latency, and packet loss along a network path. Please note that with some providers they will enforce what's called 'packet priority'. In busy networks, pings bog down and waste network resources, so routers within these networks will not always reply, but the data will be forwarded to their next destination. You can see this on MTR by noticing loss at certain hops, but no loss beyond it.

We are most interested in MTR reports with cascading packet loss; in other words the packet loss remains at the same level, or gets worse as it traverses the path to the destination.

For our international customers, please understand that world wide internet quality of service isn't universal. While one day you may hit our location at 120ms, the next day you may get only 320ms response. World wide internet delay is not within our control, and sometimes it just takes time for these networks to work out problems within themselves. If you believe that your internet connection is always very slow, please send us mtr reports so that we can determine if your server's network connection is badly affected by some bad internet routes.Our engineers will analyze your reports and determine if we may be able to reroute traffic through a different provider.

For throughput issues, please run iperf (Windows and Linux tool). IPerf will make a direct connection on a specified port and measure throughput from a server to client machine. Please make sure you're not choosing ports which have a firewall enabled.

For any of the tools mentioned, please be sure to read the documentation.

When remitting these reports, please attach these files in TXT format. If possible, TXT formatting will retain the spacing and formatting for easier reading, and this makes it much easier for us to read such reports.

For Windows users.

Download the latest version of WinMTR from http://winmtr.sourceforge.net/ or http://downloads.krypt.com/winmtr_bin_0.8.zip

1. Extract the file

2. Enter your Krypt Server IP address into the host field

3. Click Start

4. Allow the program to run for 5 minutes

5. Choose Export to TEXT

6. Upload the text file output to a support ticket in https://my.KRYPT.com The output will show our engineers where the packet loss and network issues are coming from, from your host to our network. If needed an engineer will request you to run a similar test to another Host IP address.

For Linux users you must install mtr. These are commands assuming you are using some type of redhat distro (ie. centos, fedora, etc)

1. to install mtr enter "yum insall mtr"

2. then enter "/usr/sbin/mtr ip address"

3. it will display

#/usr/sbin/mtr 4.2.2.2

Matt's traceroute  [v0.54]
help.krypt.com    Thu Feb 7 22:10:01 2008
Keys:  D - Display mode  R - Restart statistics  Q - Quit
Packets    Pings    Hostname    %Loss   Rcv    Snt    Last Best    Avg    Worst
 1. VLAN99.BR2.SNA1.VPLS.NET   0%  8    8     0     0      0           0
 2. GIG3-2-1000M.BR5.SNA1.VPLS.NET     0%    8    8     0    0       1           8
 3. 209.234.157.57                                           0%    8    8     1    1   11
 4. sl-gw28-ana-12-3.sprintlink.net                    0%    8    8    12   12   59        164
 5. sl-gw28-ana-12-3.sprintlink.net                    0%    8    8    12   12   61        182
 6. sl-bb21-ana-11-0.sprintlink.net                     0%    8    8    12   12   13          21
 7. sl-st20-la-13-0-0.sprintlink.net                      0%    8    8    12   12   12         13
 8. so-5-0-0.edge2.LosAngeles1.Level3.net       0%    7    7     2    2      2           2
 9. vlan79.csw2.LosAngeles1.Level3.net           72%    2    7    13   13   13        13
10. ge-5-2.core1.LosAngeles1.Level3.net           0%    7    7     2    2    2            3
11. vnsc-bak.sys.gtei.net                                     0%    7    7     2    2    3            3

5. Allow this to run for five minutes then copy and paste the results to a support ticket in https://my.KRYPT.com The output will show our engineers where the packet loss and network issues are coming from, from your host to our network. If needed an engineer will request you to run a similar test to another Host IP address.