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Full Version: Internmittent connectivity this afternoon - how to troubleshoot?
The Planet Forums > System Administration > Network
Jeff
I'm seeing something very odd on my DSL connection this afternoon as of the last hour -- I'm unable to ping some IPs on both my servers while others work fine from my DSL connection, while I'm finding browsing those affected IPs to be sluggish and email to be intermittent. I can ping those same IPs just fine from a backup satellite connection or other servers. What is weird is that a tracerout seems to make it to the planet's network just before the server itself but then the last IPs of the server are failing to respond on the DSL connection.

How do I troubleshoot this? Any ideas?

At first I thought it was a firewall issue on my server, but no change when flushing iptables as a test.
And I can ping from the server back to me (67.54.183.xx) just fine.

Then I found the same thing with this forum and theplanet.com itself. For example:

Tracing route to theplanet.com [70.87.6.117]
over a maximum of 30 hops:

1 <1 ms <1 ms <1 ms 192.168.0.1
2 15 ms 14 ms 15 ms h69-128-27-1.stjmmi.dsl.dynamic.tds.net [69.128.27.1]
3 44 ms 50 ms 46 ms mdtnwiallcr52-v28.network.tds.net [69.128.254.145]
4 48 ms 56 ms 49 ms xe-0.equinix.chcgil09.us.bb.gin.ntt.net [206.223.119.12]
5 50 ms 79 ms 54 ms ae-0.r21.chcgil09.us.bb.gin.ntt.net [129.250.3.98]
6 83 ms 76 ms 70 ms p64-2-2-0.r21.dllstx09.us.bb.gin.ntt.net [129.250.2.22]
7 71 ms 80 ms 73 ms po-2.r02.dllstx09.us.bb.gin.ntt.net [129.250.2.174]
8 79 ms 78 ms 74 ms xe-4-4.r03.dllstx09.us.ce.gin.ntt.net [157.238.225.6]
9 91 ms 90 ms 87 ms te9-1.dsr01.dllstx3.theplanet.com [70.87.253.6]
10 92 ms 83 ms 86 ms 76.fd.5746.static.theplanet.com [70.87.253.118]
11 * * * Request timed out.
12 * * * Request timed out.
13 * * * Request timed out.
14 * * * Request timed out.
15 * * * Request timed out.
16 * * * Request timed out.
17 * * * Request timed out.
18 * * * Request timed out.
19 * * * Request timed out.

I can obviously ping theplanet.com from another connection just fine
PING theplanet.com (70.87.6.117) from 69.5.4.2 : 56(84) bytes of data.
64 bytes from 75.6.5746.static.theplanet.com (70.87.6.117): icmp_seq=0 ttl=243 time=40.7 ms
64 bytes from 75.6.5746.static.theplanet.com (70.87.6.117): icmp_seq=1 ttl=243 time=40.1 ms
64 bytes from 75.6.5746.static.theplanet.com (70.87.6.117): icmp_seq=2 ttl=243 time=39.2 ms
64 bytes from 75.6.5746.static.theplanet.com (70.87.6.117): icmp_seq=3 ttl=243 time=42.9 ms
64 bytes from 75.6.5746.static.theplanet.com (70.87.6.117): icmp_seq=4 ttl=243 time=40.3 ms
64 bytes from 75.6.5746.static.theplanet.com (70.87.6.117): icmp_seq=5 ttl=243 time=39.9 ms
64 bytes from 75.6.5746.static.theplanet.com (70.87.6.117): icmp_seq=6 ttl=243 time=39.4 ms

But from my dsl connection at 67.54.183.xx all of a sudden I'm getting:
Pinging theplanet.com [70.87.6.117] with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.

Ping statistics for 70.87.6.117:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

I'm not seeing any issues with any other domains/IPs except some of those at the planet this afternoon on my dsl connection.

Any ideas?
Jeff
And now it seems to have resolved itself and all is well again.

Tracing route to theplanet.com [70.87.6.117]
over a maximum of 30 hops:

1 <1 ms <1 ms <1 ms 192.168.0.1
2 16 ms 15 ms 15 ms 69.128.27.1
3 49 ms 48 ms 50 ms mdtnwiallcr52-v28.network.tds.net [69.128.254.145]
4 52 ms 50 ms 45 ms xe-0.equinix.chcgil09.us.bb.gin.ntt.net [206.223.119.12]
5 55 ms 51 ms 53 ms ae-0.r21.chcgil09.us.bb.gin.ntt.net [129.250.3.98]
6 79 ms 75 ms 80 ms p64-2-2-0.r21.dllstx09.us.bb.gin.ntt.net [129.250.2.22]
7 * 85 ms 84 ms po-2.r02.dllstx09.us.bb.gin.ntt.net [129.250.2.174]
8 81 ms 87 ms 87 ms xe-4-4.r03.dllstx09.us.ce.gin.ntt.net [157.238.225.6]
9 92 ms 88 ms 79 ms te9-1.dsr01.dllstx3.theplanet.com [70.87.253.6]
10 94 ms 88 ms 92 ms 76.fd.5746.static.theplanet.com [70.87.253.118]
11 93 ms 91 ms 86 ms 75.6.5746.static.theplanet.com [70.87.6.117]
12 91 ms 86 ms 86 ms 75.6.5746.static.theplanet.com [70.87.6.117]

Trace complete.


I'm still not sure what to make of the intermittent connectivity earlier today from this one dsl ISP where I was unable to reach multiple server IPs here, intermittently, including theplanet.com itself while I could get the router directly behind the server. Something I have never seen before.
bryan0514
I am having the same problems, just started a little over an hour ago. Is there anyone who knows how to troubleshoot this? Any help would be appreciated. Thanks.

Bryan
Jeff
I'm seeing the same thing tonight, but it's so intermittent in nature that I don't know where to begin tracking it down.

1.) It affects my DSL ISP (TDS)
2.) It seems to only be present with servers hosted at The Planet.

Pinging ThePlanet.com
Ping statistics for 70.87.6.117:
Packets: Sent = 292, Received = 263, Lost = 29 (9% loss),
Approximate round trip times in milli-seconds:
Minimum = 70ms, Maximum = 157ms, Average = 85ms

Pinging Google at the same time
Ping statistics for 72.14.207.99:
Packets: Sent = 351, Received = 351, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 88ms, Maximum = 210ms, Average = 107ms
wcharnock
Greetings,

The issues you saw were probably related to some issues we had with one of our carrier connections yesterday (Level3). If the problem is persisting please open a ticket so we can investigate the issue.

Thanks,
fooman
QUOTE (wcharnock @ Aug 8 2008, 04:08 PM) *
Greetings,

The issues you saw were probably related to some issues we had with one of our carrier connections yesterday (Level3). If the problem is persisting please open a ticket so we can investigate the issue.

Thanks,



As I am aware of, the problem seems on H6. Isn`t it?
My 3 servers on H6 has experienced intermittent connection at the same time.
(My other 3 in H2 are no problem)
it comes back to normal speed in a short peripd of time. but it occurs again and again.
I opened the ticket #5041004PLNT
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