[lug] Traceroute question

[John Hernandez]

Michael Deck wrote:

> Hmm. I've probably not explained my issue very well.
> 
> I'm sitting at my firewall box. I type
> 
> $ /usr/sbin/traceroute -I -n 198.60.253.132
> 
> (which happens to be my domain name server) and I see
> 
> traceroute to 198.60.253.132 (198.60.253.132), 30 hops max, 38 byte packets
>   1  204.229.110.254  197.794 ms  197.796 ms  198.676 ms
>   2  207.159.128.130  186.470 ms  186.111 ms  186.681 ms
>   3  207.159.128.22  186.447 ms  188.429 ms  186.776 ms
>   4  144.228.96.5  186.115 ms  188.265 ms  187.247 ms
>   5  144.232.6.49  186.274 ms  188.022 ms  187.507 ms
>   6  144.232.18.86  188.325 ms  188.039 ms  185.861 ms
>   7  144.232.18.9  221.302 ms  221.992 ms  225.127 ms
>   8  144.232.6.238  221.893 ms  221.453 ms  221.235 ms
>   9  144.232.132.162  245.580 ms  242.281 ms  254.683 ms
> 10  198.60.253.132  259.803 ms  254.478 ms  261.568 ms
> 11  198.60.253.132  257.081 ms  265.257 ms  248.286 ms
> 
> If I read this right, every hop takes ~200ms. Am I reading this right? What
> do the last 3 numbers on each line mean?
> 
> Now, if I go to another system and traceroute back to myself,
> 
> morte> traceroute -I -n www.cleansoft.net
> traceroute to www.cleansoft.net (204.229.110.227), 30 hops max, 38 byte packets
>   1  137.78.15.1  0.489 ms  0.355 ms  0.351 ms
>   2  137.78.10.7  0.260 ms  0.239 ms  0.367 ms
>   3  192.138.85.70  35.386 ms  232.262 ms  1.428 ms
>   4  130.152.72.1  3.018 ms  3.136 ms  2.588 ms
>   5  130.152.128.2  5.896 ms  5.002 ms  5.529 ms
>   6  209.189.66.65  6.613 ms  5.748 ms  4.541 ms
>   7  129.250.29.126  5.108 ms  5.581 ms  5.698 ms
>   8  129.250.2.113  14.780 ms  14.978 ms  14.993 ms
>   9  209.0.227.5  15.020 ms  16.128 ms  14.883 ms
> 10  209.247.11.5  14.761 ms  14.159 ms  14.704 ms
> 11  209.244.2.242  31.132 ms  33.360 ms  30.743 ms
> 12  209.245.176.110  31.866 ms  31.393 ms  31.593 ms
> 13  216.122.67.78  33.246 ms  33.079 ms  34.076 ms
> 14  204.229.110.227  272.465 ms  292.970 ms  213.102 ms
> 
> only the last hop takes ~200ms.
> 
> So, my only question is, how do I read the traceroute output? What exactly
> do the numbers mean?
> 
> If the entire difference is that my first hop is costly, that's one issue I
> can take up with the service provider. If, somehow, every hop is costly
> outbound, that's different.
> 
> To my knowledge there is no other traffic in and out.
> 
> -Mike
> 
> Michael Deck
> Cleanroom Software Engineering, Inc.
> 
> _______________________________________________
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Each line shows the total round-trip time for each of 3 packets sent. 
You should expect these times to increase as you get further out along
the hops.  It looks like the link closest to your firewall box is the
slowest by far.

-- 

John Hernandez, Network Engineer --------------------------------------
US Department of Commerce                             tel: 303-497-6392
NOAA/OAR - Mailstop R/OM12                            fax: 303-497-6005
325 Broadway                            e-mail: John.Hernandez at noaa.gov
Boulder, CO 80303                               http://boulder.noaa.gov
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