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tracert

Please tell me if you can tell what is happening in this trace route to softlayer.com

Is there any reason to not consider softlayer as a potential webhosting company because of these results? Shall I ignore that the trace route never ends at softlayer.com?


Ping is successful every time and the softlayer.com website always shows up fine from my PC, however the trace route always stops after the same hop.

(ping times are larger than average because I am outside the U.S)

Ping results

Pinging softlayer.com [66.228.118.53] with 32 bytes of d
Reply from 66.228.118.53: bytes=32 time=208ms TTL=238
Reply from 66.228.118.53: bytes=32 time=206ms TTL=238
Reply from 66.228.118.53: bytes=32 time=207ms TTL=238
Reply from 66.228.118.53: bytes=32 time=207ms TTL=238

Ping statistics for 66.228.118.53:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 206ms, Maximum = 208ms, Average = 207ms




Pathping results (The first 8 hops have been omitted. They look ok and do not contain any asterisks)


Tracing route to softlayer.com [66.228.118.53]
over a maximum of 30 hops:

  9  62.75.3.49
 10     *        *        *

Computing statistics for 22 seconds...
  9   44ms     0/  10 =  0%     0/  10 =  0% [62.75.3.49]

Trace complete.




I also tried MTR tests from http://www.websitepulse.com/help/tools.php to softlayer.com
I selected three different monitoring locations to perform the MTR,  NY, Munich and Melbourne. They all ended successfully at the softlayer.com website, with only some packet loss at one or two hops.
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netplus21
Asked:
netplus21
1 Solution
 
Don JohnstonInstructorCommented:
Some providers will block ICMP TTL exceeded messages.

If you're are getting responses from your ping (ICMP echo-reply) and everything else shows you have connectivity, then the provider is blocking the TTL exceeded messages.
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Dave BaldwinFixer of ProblemsCommented:
Windows 'tracert' uses ICMP (ping) to check the responses and as @donjohnston said, a number of servers block ICMP responses.  Unix systems usually use a different method with UDP packets and a third method uses TCP packets.  These other methods can get thru when ICMP is blocked.

http://en.wikipedia.org/wiki/Traceroute
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Don JohnstonInstructorCommented:
While it's true that some O/S's and utilities will use a UDP or TCP packet to a random port number, the issue here remains unchanged.

What is being blocked is the TTL exceeded response message.

It doesn't matter if the probe is an ICMP, UDP or TCP packet. The response is what's being blocked.
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mccarlIT Business Systems Analyst / Software DeveloperCommented:
however the trace route always stops after the same hop.
Is tracert stopping or are you ending it manually just because you see the *  *  *? If you let it run, it should still get to the actual server's address in a hop further down, ie. > hop10. It is just intermediate hops are not responding (or having their response blocked) as stated by the other comments above.
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netplus21Author Commented:
mccarl: i am not stopping the pathping manually.

donjohnston: as you noted, i have ping response and connectivity. should i be concerned with not being able to view the complete tracert? since there is no packet loss in ping, would there probably not be much packet loss in a complete tracert?
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Don JohnstonInstructorCommented:
should i be concerned with not being able to view the complete tracert?
No. It's annoying, but not unusual.

since there is no packet loss in ping, would there probably not be much packet loss in a complete tracert?
Correct. The only loss is the provide blocking the response.
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