[outages] Routing issues?

[Aubrey Wells]

The !H is traceroute telling you that 38.104.251.246 reported that the
destination IP is unreachable. This means that 38.104.251.246 is the router
one hop up from your destination IP but its not able to resolve a MAC
address for the IP, IE: your machine is not responding to ARP requests.

My traceroute takes a completely different path through AT&T and then GTT.
Your destination IP is advertised out of ASN 32489 which has GTT as an
upstream so I'd say the issue is with either GTT, your hosting provider, or
your server itself. Since I have GTT/nLayer as an upstream and am not
having any problems with them at the moment, and I can sucessfully
traceroute to an IP adjacent to yours (184.75.220.217) I'd wager the most
likely source of the trouble is your server itself. You might want to
contact your hosting provider's support desk and have them check on it.


---------------------
Aubrey Wells
Manager, Network Operations
Digium Cloud Services
Main: 888.305.3850
Support: 877.344.4861 or http://www.digium.com/en/support
<http://www.digium.com/en/support?elq=65516445a5964d3597e25eaf566bc2cf&elqCampaignId=>

On Sat, Oct 31, 2015 at 10:13 AM, Samer Ziadeh via Outages <
outages at outages.org> wrote:

> I'm getting routing issues to my server, when I traceroute, I eventually
> get "!H" to one of the nodes, but when I traceroute the node itself it's
> fine. I can't even ping or SSH into it, I keep getting network unreachable.
> I'm also confused about # 10 and 11, as they are the same.
>
> Is that a Cogent IP? Anyone knows what's going on?
>
> traceroute to 184.75.220.218 (184.75.220.218), 64 hops max, 52 byte packets
>
>  1  10.0.1.1 (10.0.1.1)  3.468 ms  1.898 ms  1.035 ms
>
>  2  7.11.164.237 (7.11.164.237)  15.989 ms  13.477 ms  14.213 ms
>
>  3  209.148.243.9 (209.148.243.9)  16.695 ms  15.316 ms  16.864 ms
>
>  4  69.63.248.233 (69.63.248.233)  14.564 ms  12.200 ms  24.710 ms
>
>  5  24.156.144.178 (24.156.144.178)  28.042 ms  29.279 ms  24.806 ms
>
>  6  * * *
>
>  7  be2217.ccr42.ord01.atlas.cogentco.com (154.54.24.205)  171.283 ms
> 37.942 ms  50.327 ms
>
>  8  be2718.ccr22.cle04.atlas.cogentco.com (154.54.7.130)  120.499 ms
> 39.208 ms
>
>     be2185.ccr22.cle04.atlas.cogentco.com (154.54.43.178)  138.381 ms
>
>  9  be2597.ccr22.yyz02.atlas.cogentco.com (154.54.31.90)  176.050 ms
> 132.849 ms  177.392 ms
>
> 10  38.104.251.246 (38.104.251.246)  177.557 ms  42.334 ms  135.418 ms
>
> 11  38.104.251.246 (38.104.251.246)  3048.770 ms !H  3046.702 ms !H
> 3055.225 ms !H
>
>
>
> --
> - Samer
>
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