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  #1 (permalink)  
Old 09-13-2006, 06:18 AM
KraftDiner
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Default odd traceroute...

I've noticed a long delay whenever i type in a url in to my browser...
I decided to do a traceroute to see what was wrong..
This is what I found....
% traceroute google.com
traceroute: Warning: google.com has multiple addresses; using
64.233.187.99
traceroute to google.com (64.233.187.99), 64 hops max, 40 byte packets
1 192.168.1.1 (192.168.1.1) 3.819 ms 2.097 ms 1.938 ms
2 * * *
3 rd1no-ge3-0-0-1.cg.shawcable.net (64.59.142.115) 22.471 ms 10.471
ms 8.648 ms
4 rc1no-ge6-0-0.cg.shawcable.net (66.163.77.5) 26.183 ms 15.414 ms
10.912 ms
5 rc1so-pos15-0.cg.shawcable.net (66.163.77.9) 12.143 ms 23.177 ms
17.998 ms
6 rc1wh-pos12-0.vc.shawcable.net (66.163.76.10) 24.113 ms 30.108 ms
25.873 ms
7 rc1wt-pos1-0-0.wa.shawcable.net (66.163.76.2) 26.423 ms 25.656 ms
29.004 ms
8 six.sea01.google.com (198.32.180.17) 26.730 ms 31.314 ms 37.598
ms
9 72.14.233.117 (72.14.233.117) 68.557 ms 67.478 ms 67.403 ms
10 72.14.236.26 (72.14.236.26) 84.189 ms 103.591 ms 85.113 ms
11 72.14.236.175 (72.14.236.175) 83.759 ms 85.358 ms 84.454 ms
12 216.239.49.222 (216.239.49.222) 86.832 ms 87.021 ms 87.286 ms
13 64.233.187.99 (64.233.187.99) 83.578 ms 84.233 ms 83.444 ms


Notice the 2nd hop.. RIght between my wireless NAT/Router and my ISP.
It takes a good ten seconds to get to the third hop.
Does the ISP need to be provided with DNS information or does that all
get automatically resolved by DHCP? Or am I barking up the completely
wrong tree? If so what else should I be looking at?


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  #2 (permalink)  
Old 09-13-2006, 06:23 AM
KraftDiner
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Default Re: odd traceroute...

Going one step further...
I went to the wireless router/nat (linksys WRT54G) and ran a
traceroute on it...
again pretty much the same results..
traceroute to google.com (64.233.167.99), 30 hops max, 40 byte packets
1 * * * Request timed out.
2 rd1no-ge3-0-0-1.cg.shawcable.net (64.59.142.115) 8.682 ms 6.915 ms
8.153 ms
3 rc1no-ge6-0-0.cg.shawcable.net (66.163.77.5) 8.412 ms 8.130 ms 7.629
ms
4 rc1so-pos15-0.cg.shawcable.net (66.163.77.9) 7.730 ms 7.831 ms *
5 rc1wh-pos12-0.vc.shawcable.net (66.163.76.10) 22.081 ms 39.183 ms
20.218 ms
6 rc1wt-pos1-0-0.wa.shawcable.net (66.163.76.2) 24.817 ms 24.370 ms
24.379 ms
7 six.sea01.google.com (198.32.180.17) 23.689 ms 30.040 ms 24.448 ms
8 72.14.233.117 (72.14.233.117) 67.734 ms 67.655 ms 65.974 ms
9 66.249.95.247 (66.249.95.247) 65.164 ms 66.249.95.245 (66.249.95.245)
65.386 ms 65.116 ms
10 72.14.232.53 (72.14.232.53) 67.137 ms 66.249.94.135 (66.249.94.135)
67.143 ms 67.969 ms
11 72.14.232.70 (72.14.232.70) 79.638 ms 73.242 ms 64.233.175.26
(64.233.175.26) 73.481 ms
12 64.233.167.99 (64.233.167.99) 68.193 ms 68.298 ms 71.696 ms
Trace complete


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  #3 (permalink)  
Old 09-13-2006, 11:57 PM
DanS
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Default Re: odd traceroute...

"KraftDiner" <bobrien18@yahoo.com> wrote in news:1158128283.054383.115590
@d34g2000cwd.googlegroups.com:

> I've noticed a long delay whenever i type in a url in to my browser...
> I decided to do a traceroute to see what was wrong..
> This is what I found....
> % traceroute google.com
> traceroute: Warning: google.com has multiple addresses; using
> 64.233.187.99
> traceroute to google.com (64.233.187.99), 64 hops max, 40 byte packets
> 1 192.168.1.1 (192.168.1.1) 3.819 ms 2.097 ms 1.938 ms
> 2 * * *
> 3 rd1no-ge3-0-0-1.cg.shawcable.net (64.59.142.115) 22.471 ms 10.471
> ms 8.648 ms
>


I typically see a hop like that when ging through a router. I don't know
about anyone, but I use 3 different NAT routers at 3 different, nad they
all do that on either the first or second hop.


DanS

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  #4 (permalink)  
Old 09-14-2006, 12:24 AM
Bert Hyman
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Default Re: odd traceroute...

In news:1158128283.054383.115590@d34g2000cwd.googlegr oups.com "KraftDiner"
<bobrien18@yahoo.com> wrote:

> I've noticed a long delay whenever i type in a url in to my browser...
> I decided to do a traceroute to see what was wrong..
> This is what I found....
> % traceroute google.com
> traceroute: Warning: google.com has multiple addresses; using
> 64.233.187.99
> traceroute to google.com (64.233.187.99), 64 hops max, 40 byte packets
> 1 192.168.1.1 (192.168.1.1) 3.819 ms 2.097 ms 1.938 ms
> 2 * * *
> 3 rd1no-ge3-0-0-1.cg.shawcable.net (64.59.142.115) 22.471 ms 10.471
> ms 8.648 ms
> ...
>
>
> Notice the 2nd hop.. RIght between my wireless NAT/Router and my ISP.
> It takes a good ten seconds to get to the third hop.


Well, no. It takes about 10 milliseconds to get to the third hop (three
responses, shortest 8.6ms, longest 22.4ms).

Whatever device is at hop two is simply not responding to the ICMP message
that traceroute uses; not every box does.

If you're seeing long delays when doing your traceroute, use the "-n"
option, so you won't waste all that time looking up the name of each node.


--
Bert Hyman St. Paul, MN bert@iphouse.com

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  #5 (permalink)  
Old 09-14-2006, 12:52 AM
Moe Trin
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Default Re: odd traceroute...

On 12 Sep 2006, in the Usenet newsgroup alt.internet.wireless, in article
<1158128283.054383.115590@d34g2000cwd.googlegroups .com>, KraftDiner wrote:

>I've noticed a long delay whenever i type in a url in to my browser...
>I decided to do a traceroute to see what was wrong..


Probably not the best solution. First, the original LBL traceroute is
using UDP - your web browser uses TCP, and some routers treat the two
protocols differently (UDP is generally lower in priority). The b0rked
windoze "TRACERT" and a few "improved" UNIX traceroute implementations
use ICMP echo (ping) which is even more useless. Second, a more
suitable tool would be a packet sniffer. Are you seeing retransmits?

> 1 192.168.1.1 (192.168.1.1) 3.819 ms 2.097 ms 1.938 ms
> 2 * * *
> 3 rd1no-ge3-0-0-1.cg.shawcable.net (64.59.142.115) 22.471 ms 10.471 ms
> 8.648 ms


man traceroute - the LBL man page is quite extensive. Look at the -q and
-w options

-q nqueries
Set the number of probes per ``ttl'' to nqueries (default is
three probes).

-w Set the time (in seconds) to wait for a response to a probe
(default 5 sec.).

and the examples in the man page.

>Notice the 2nd hop.. RIght between my wireless NAT/Router and my ISP.
>It takes a good ten seconds to get to the third hop.


The second hop is ignoring/blocking/dropping UDP and/or isn't providing an
ICMP Type 11 error for some reason - often, a misguided attempt at some
form of security. Your traceroute has to wait for each attempt to time out
before heading for hop 3. Normal. This has absolutely nothing to do
with delays in loading a web page - notice that hops after this host are
not showing significant delays because hop 2 isn't talkative.

>Does the ISP need to be provided with DNS information or does that all
>get automatically resolved by DHCP?


Nothing to do with it - but you _could_ use the -n option to tell traceroute
not to look up the hostnames. You probably won't see a difference in the
reported delays.

>Or am I barking up the completely wrong tree? If so what else should I
>be looking at?


Not enough information. I'd be looking at tcpdump (or what ever packet
sniffer you have on that box and are comfortable with) to see what the
packets are doing. There are quite a number of possibilities. As for
trying to locate delays enroute, I don't know if tcptraceroute or hping2 is
available for OSX (applications that can run a traceroute using TCP instead
of UDP), but I suspect your problem lies elsewhere. Certainly the two
traces you provide show no network problems.

Old guy

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