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djporter

Internet Routing Problem ?

8 posts in this topic

The the past week I've been unable to browse www.scubaboard.com, because "the server where this page isn"t located is responding". But the site is accessible by local friends and http://www.isitdownrightnow.com/scubaboard.com.html shows it as up. I also tried bypassing dns lookup and going direct to 69.28.64.170 but no success.

Traceroute looks like this:

traceroute to scubaboard.com (69.28.64.170), 64 hops max, 52 byte packets

1 10.0.1.1 (10.0.1.1) 8.779 ms 0.732 ms 0.677 ms

2 192.168.1.1 (192.168.1.1) 1.157 ms 1.038 ms 0.864 ms

3 10.90.229.1 (10.90.229.1) 7.028 ms 6.665 ms 7.977 ms

4 dtr01vntrca-tge-0-0-1-2.vntr.ca.charter.com (96.34.97.16) 8.529 ms 7.831 ms 7.753 ms

5 crr01lnbhca-tge-0-6-0-6.lnbh.ca.charter.com (96.34.96.54) 13.159 ms 13.154 ms 11.756 ms

6 crr02lnbhca-tge-0-0-0-13.lnbh.ca.charter.com (96.34.99.205) 10.602 ms 11.276 ms 11.985 ms

7 crr01rvsdca-tge-0-5-0-2.rvsd.ca.charter.com (96.34.100.31) 16.044 ms

crr01rvsdca-tge-0-4-0-8.rvsd.ca.charter.com (96.34.97.88) 14.578 ms

crr01rvsdca-tge-0-2-0-2.rvsd.ca.charter.com (96.34.100.107) 19.590 ms

8 bbr01rvsdca-bue-2.rvsd.ca.charter.com (96.34.2.66) 21.081 ms 16.579 ms 15.931 ms

9 bbr01mtpkca-bue-4.mtpk.ca.charter.com (96.34.0.23) 20.816 ms 22.278 ms 15.966 ms

10 be4016.ccr21.lax05.atlas.cogentco.com (38.104.84.101) 17.744 ms 17.977 ms 17.978 ms

11 be2023.ccr21.lax01.atlas.cogentco.com (154.54.30.185) 18.551 ms 18.618 ms

be2025.mpd21.lax01.atlas.cogentco.com (154.54.30.189) 17.735 ms

12 be2067.mpd21.iah01.atlas.cogentco.com (154.54.7.161) 54.084 ms 54.233 ms 53.759 ms

13 * * *

14 * * *

15 * * *

16 * * *

17 * * *

18 * * *

19 *^C

Any suggestions on how to go about resolving this problem? Should I try to get my isp (Charter) to contact cognetco.com or is there a better way? Thanks for any ideas.

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Sounds like Charter's routing, as you surmise (noting the site resolves OK through their NS). They need to fix it.

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Sounds like Charter's routing, as you surmise (noting the site resolves OK through their NS). They need to fix it.

Okay, thanks Farelf.

I'm a novice at this, but it looks like it made 4 hops into cogentco.com before timing out. Is Charter at fault for routing it incorrectly to cogentco, or could the problem be with cogentco?

Appreciate your help.

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No expert either but clearly it is up to your provider (Charter) to have routing that works consistentlly for (all) its customers, else their utility approaches that of an ash-tray on a surfboard and certainly doesn't deserve your custom. It usually turns out someone upstream of them has changed something so part of the "delivered" network no longer works through the allotted trunk and distribution network. If you send them your traceroute that will help them trouble-shoot.

Actually "received wisdom" on all of this is "try another browser" or "clear your browser cache", as first things to try. Followed by "check your 'hosts' file". In my observation real-life instances of failure to reach specific websites (in isolation of other symptoms) are rarely found to be due to any of those. It is almost always the provider's routing has been changed by the provider (without adequate testing before-hand), or it has been changed by their upstreams, perhaps without telling them or the routing/cable has been physically disrupted. In some cases they won't be at all aware there is a problem until advised (or do a remarkable job of pretending that is the case, but give them the benefit of the doubt, I think it is more often true).

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Looks like I reached a dead end. Charter refuses to investigate or even open a trouble ticket since the problem appears to be upstream at cogent.

Then I called Cogent Communications and they won't talk to me since I'm not their customer. They will talk to Charter but Charter refuses to call them.

So I'll use a public proxy for now and maybe someday the problem will resolve.

Thanks again for your help Farelf.

Don

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Hi, Don,

<snip>

Then I called Cogent Communications and they won't talk to me since I'm not their customer. They will talk to Charter but Charter refuses to call them.

<snip>

...And I trust that you (and anyone else you know who currently is but has a choice of another provider) will not be a customer of Charter pretty soon. :) <g>

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Hi, Don,...And I trust that you (and anyone else you know who currently is but has a choice of another provider) will not be a customer of Charter pretty soon. :) <g>

If I had a choice I'd already be gone, but no other option in my area. Charter moved in here and swallowed our previous independent, responsive, isp.

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...Yikes, not even AT&T U-verse or one of the satellite services?

...You might try searching the web for "ISP xxxxx" where xxxxx is your zip code.

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