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| Help with inconsistent connection I have a comtrend modem, sonic fusion, belkin router. I stopped using my wireless due to interference and now use powerline adapters. Speed is the same but most of the time the connection is better (less buffering of video). However, the last two days my connection to the internet has "hung" for between 5 and 30 seconds. Usually I can get reconnected if I refresh the dhcp lease. When I open the network preferences diagnostic (imac) I see a red button on ISP, red or yellow on internet, but green on network and my computer. A quick dhcp refresh and in 5 seconds it's green for everything, with a dialogue saying my connections have changed. I ran a line test on dsl reports and it failed at the target IP twice. I also ran a test on ispgeeks. All are below. I don't know enough to identify the problem so I can't work to solve it. Any suggestions appreciated. I did run the same test direct modem-powerline with similar results so the router isn't the issue, I don't think.
Connection Analysis
Test Type: Quality Test
Location:
Download Speed: 11092 kbps
Upload Speed: 896 kbps
Speed Consistency: 95 %
Round Trip Time: 39 ms
Max Route Speed: 13443 kbps
Max Pause: 36 ms
Bandwidth: 13377 kbps
Forced Idle: 0
Average Delay: 1 ms
Round Trip Time Consistency: 97 %
Concurrent TCP: 1.2
Upload Speed Consistency: 94 %
Test Type: s / s
TCP MTU: 1450
TCP Receive Stats
Packets not in order: 0
Bytes out of order: 0
Packets outside TCP Window: 0
Bytes after rec. window: 0
Bytes Lost: 0
Duplicate Packets: 0
Bytes rec. in duplicate packets: 0
Partially duplicate packets: 0
Bytes rec. in partially dup. pkts: 0
Pkts rec. w/ bad offset to data segment: 0
Pkts rec. w/ bad checksum: 0
Pkts rec. which are too short: 0
Window probes received: 0
Zero Window Updates Sent: 0
TCP Send Stats
Packets Retransmitted: 0
Bytes Retransmitted: 0
Retransmit Timeouts: 0
Fast Transmits: 0
Duplicate acks received: 0
Persist timer timeouts: 0
Acks received for unsent data: 0
Pure window upd pkts: 0
Windows probes sent: 0
Send window close events: 0
Ethernet stats
Receive overruns: 0
Frames Received w/ bad checksum: 0
Frames Received Too Large: 0
Frames rec. not octet-aligned: 0
Frames rec. too short: 0
Frames received truncated: 0
Network Stats
Network down time: 0 secs
Network up time: 13048 secs
Network downtime in current 24 hour period: 0.0%
HTTP 3XX Error: 0
HTTP 4XX Error: 0
HTTP 5XX Error: 0
unknown HTTP Error: 0
Environment
Version: V3.0.0.30 Built: Jun 9 2011 16:30:16
Ms since last restart: 951659
Size of FP Queue: 348
Glossary of Results
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1 connection problem found, click the to learn more.
SQMD01: TCP is waiting too long for data
Line Quality / Ping Test : Results
Anonymous test
Tools page
Test again
Forum: Site Tools
recent results from sonic.net
Test (From Central USA) Loss Min
Latency Avg
Latency Max
Latency Pass
Fail
basic ping
10s of 40 byte packets, 2 per second 0% 84.9ms 86.9ms 88.8ms [pass]
pass
low bandwidth stream
10s of 512 byte packets at 56 kbit 0% 88.4ms 92.0ms 126ms [pass]
pass
medium bandwidth stream was not performed
higher bandwidth stream was not performed
your first hop ping
stream of 40byte pings to 70.36.201.94 0% loss 67.9ms You are 17ms
to your first hop [pass]
pass
Jitter/loss with small packets tested from Central - USA:
Jitter/loss with small packets tested from West Coast - USA:
1 minute MTR (hop loss analysis) from Central - USA
Hop Host LOSS Rcv Sent Best Avg Worst
0 ae-2.bb-c.slr.lxa.us.oneandone.net 0% 60 60 0.29 1.08 7.80
1 ae-11.bb-c.ms.mkc.us.oneandone.net 0% 60 60 0.74 0.87 1.51
2 ae-11.bb-c.ws.mkc.us.oneandone.net 0% 60 60 0.86 1.02 1.47
3 ae-10.bb-d.ws.mkc.us.oneandone.net 0% 60 60 0.94 2.22 20.86
4 te-3-2.bb-d.cr.chi.us.oneandone.net 0% 60 60 11.60 15.83 184.53
5 p12-3.ir1.chicago2-il.us.xo.net 0% 60 60 11.61 14.81 71.87
6 207.88.14.193.ptr.us.xo.net 0% 60 60 66.99 73.12 78.70
7 te-4-1-0.rar3.denver-co.us.xo.net 0% 60 60 66.56 72.28 78.53
8 te-3-0-0.rar3.sanjose-ca.us.xo.net 0% 60 60 67.44 72.42 78.48
9 207.88.14.226.ptr.us.xo.net 22% 47 60 66.15 67.24 98.55
10 0.xe-4-1-0.gw.equinix-sj.sonic.net 0% 60 60 66.17 69.83 121.91
11 tengig2-1.cr1.snjsca11.sonic.net 0% 60 60 66.67 68.91 181.60
12 po6.cr1.hywrca01.sonic.net 0% 60 60 67.30 67.59 71.84
13 gig1-1-1.gw.albyca11.sonic.net 0% 60 60 67.89 69.64 93.43
14 (TARGET IP ADDRESS) 14% 52 60 88.50 92.38 124.90
[fail]
fail
1 minute MTR (hop loss analysis) from West Coast - USA
Hop Host LOSS Rcv Sent Best Avg Worst
0 ge-2-0-0-0.c01.sjc.bb.megapath.net 0% 60 60 0.40 5.40 171.76
1 ge-6-16.car2.SanJose1.Level3.net 0% 60 60 0.37 14.48 191.64
2 vlan90.csw4.SanJose1.Level3.net 0% 60 60 1.08 1.83 10.22
3 ae-92-92.ebr2.SanJose1.Level3.net 0% 60 60 1.08 1.32 5.54
4 ae-1-6.bar2.SanFrancisco1.Level3.net 0% 60 60 1.10 4.01 53.17
5 SONIC.NET-I.bar2.SanFrancisco1.Level3.net 0% 60 60 2.66 3.29 12.99
6 0.xe-5-1-0.gw.equinix-sj.sonic.net 0% 60 60 3.46 3.93 11.03
7 tengig2-1.cr1.snjsca11.sonic.net 0% 60 60 3.12 3.43 4.12
8 po6.cr1.hywrca01.sonic.net 0% 60 60 3.75 4.51 18.31
9 gig1-1-1.gw.albyca11.sonic.net 0% 60 60 5.20 6.65 18.21
10 (TARGET IP ADDRESS) 0% 60 60 25.84 29.34 53.81
[pass]
pass | |
 leiboldPremium,MVM
join:2002-07-09
Sunnyvale, CA
kudos:8
 ·SONIC.NET
| said by linberl:Usually I can get reconnected if I refresh the dhcp lease. When I open the network preferences diagnostic (imac) I see a red button on ISP, red or yellow on internet, but green on network and my computer. When you say "refresh the dhcp lease", do you mean on the imac, the belkin router or the comtrend modem ? I think you mean on the imac but it isn't 100% clear.
Besides the imac, do you have any other computers at home ? Do they experience the same problems ?
In order to troubleshoot the issue better, check the IP address on the imac whenever it stops working and then again after a dhcp refresh. Keep notes of those IP addresses and also the times when the problem occurs. This may point to a variety of different problems:
- ip address is always the same but lease is not being renewed and times out
- ip address changes to a different one and the computer loses connection
On the powerline adapters, are you using them with the factory settings or did you setup a custom password ? There is a possibility you may be connected to a neighbors powerline network if you are using the factory settings (which would result in a combined network with two internet connections and two local dhcp servers).
If you don't renew the lease, does the connection restore itself after some time or does it remain disconnected ?
Which comtrend modem do you have, is it the nexuslink 5631 for bonded Fusion ? Are you using it as a modem (bridged mode) or as a router ?
Do you have static or dynamic IP from Sonic ?
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| Yes, I refresh the dhcp on the imac. I also have a macbook on a different powerline which experiences the same issues.
When the IP refreshes it remains the same.
I'm using the push button encryption on the powerline units which alters the factory setting and I don't see how I could be connected to a neighbor as I am using ethernet only, and have a private house with no accessibility to my neighbor. Wouldn't they need to be plugged in to my wiring?
If I don't reset dhcp the "timeout" is usually quite long, but seems to sometimes reconnect after about 2-3 minutes but not always. I also find myself having to click multiple times to get to a new web page in the same general time, almost like a warning that it is going to drop out. I changed my imac to a manual IP today and ran the ispgeeks test and got the same "TCP is taking too long to answer" error. The dslreports Ping test today showed less packet loss but still 9% with a fail at target IP.
Comtrend 5072T (second one)
Bridge mode
Dynamic IP
Thank you for taking time to try to help me. It's frustrating not knowing what to even look at. | |
leiboldPremium,MVM
join:2002-07-09
Sunnyvale, CA
kudos:8 Reviews:
·SONIC.NET
| I admit that the symptoms you describe don't immediately combine to any obvious cause.
The possibility of the powerline adaptors connecting to a neighbor was a long shot (not impossible, but unlikely). Powerline network signals get attenuated wherever you have coils such as the magnetic trip in circuit breakers, GFCI outlets, surge suppressors, load coils in old electromechanical utility meters (but not in smart meters) and transformers and therefore most of time don't make it to your neighbor. However sometimes the conditions are right and it does happen. I'm not familiar with the pushbutton encryption of your powerline adaptor, the ones I'm using require a utility program to reconfigure the encryption password (the result is likely the same).
Switching to static IP addresses on your lan is a good idea since it kind of looks like lan dhcp may be an aspect of your problem. Has the problem happened since you did that ?
I didn't know the ispgeeks.com site but I just tried it and I'm getting the "TCP is waiting too long for data" error on a connection that works fine.
Have you tried looking at diagnostics in the belkin router ? If the problem is still happening after switching to static IP addresses on the lan, the problem might be on the wan side (or the router itself).
Edit: the next time the problem happens try to ping your belkin router by its lan IP address. If that doesn't work the problem is either the router or your powerline network. If you can ping the router but not connect to the Internet the problem is on the wan side (comtrend modem, dsl line) or the router.
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| Thank you so much - your last suggestion is great as it might help me at least narrow down where the problem is. I had an issue with constant drops when I was wireless, Sonic sent a tech out because there was "instability" on the line. Unfortunately, he could not really figure it out - he swapped my modem/cables just in case. I had a solid connection for months then the drops just started happening. So i got a new router, a dual band, and started using 5ghz, thinking it was just a lot of 2.4 interference. It helped to reduce the drops up until about 3 weeks ago. Then it started up again (no change at my house in terms of anything). That's when I decided to use powerline. The speed is the same but I was looking for stability. It is better, just not all the time. I will try the pinging when it hangs next time and, if it indicates it is not the router, I guess another call to Sonic can't hurt. Thanks again for the suggestion! | |
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