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Mulhearn1022

join:2008-06-23
Nazareth, PA

1 edit

[Connectivity] Jittery Latency (Lehigh Valley)

My 50/6 connection seems to be suffering from poor latency, with some occasional packet loss. The throughput is typical good, ranging from ~20 mbps (peak hours) - ~48 mbps. These results are taken when no one else is using the network. Here's the setup:

Cable -> Modem (Cisco DPC3008) -> Wireless Router (Asus RT-N56U) -> Laptop (Wireless)

I started out using the supplied Linksys E1200 router but that router simply couldn't handle the demand placed on it, with it's latency being much worse and more jittery. So I replaced it with the Asus that I had. Now, I've also tried plugging the laptop in directly to the modem with identical results. That should eliminate the router as a variable. I have no firewalls turned on for either the router and my laptop. The problem doesn't lie in the laptop either because from the tracert's I've run, even on wireless it only takes ~1-2 ms to get out to the modem. Once past the modem though, the latency seems to be quite inconsistent. I'm wondering if the modem supplied is the problem here, because all the stats on the modem check out perfectly. Also I noticed it has a bunch of negative reviews on amazon and newegg. Here's some pics of the speed tests, ping tests, tracert, and line quality:

(Keep in mind that I'm the ONLY one on the network, once more traffic is introduced things get much worse)

»imageshack.us/a/img811/1727/tracertsj.jpg
»imageshack.us/a/img16/5307/speedtests2.jpg
»imageshack.us/a/img708/1169/speedtestsy.jpg
»imageshack.us/a/img855/4231/pingtests.jpg
»imageshack.us/a/img853/4411/line···ty12.jpg
»imageshack.us/a/img72/9634/linequality11.jpg

Encoded MAC: f47a2f148908d6224c60939934f7defea62137d6

I'd appreciate any help you guys could provide me with.

EDIT: Changed links to tests. On second thought, its appears 209.122.64.34 is overloaded, as shown in the tracerts. Also, I have reset my modem many times since I started the 50/6 plan about 3-4 weeks ago.

Mulhearn1022

join:2008-06-23
Nazareth, PA

Mulhearn1022

join:2008-06-23
Nazareth, PA

2 edits
reply to Mulhearn1022
Line quality test taken today with no one else on the network: »/pingtest/c384···/2976275

209.122.64.34 pings: »img90.imageshack.us/img90/4764/2···ings.png
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negativeduck
Premium,VIP
join:2002-02-14
Centreville, VA
kudos:1

Re: [Connectivity] Jittery Latency (Lehigh Valley)

Mul, holy usage spike batman. We've sent a proposal over to to the PA guys to see about moving some things around to resolve this.
--
Bryan Laird
RCN Engineering

Mulhearn1022

join:2008-06-23
Nazareth, PA
Thanks Brian I really appreciate the help on this! I've been having a tough time working from home because the VPN will disconnect on me. Also, my blackberry uses the internet for calls as well.
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negativeduck
Premium,VIP
join:2002-02-14
Centreville, VA
kudos:1
reply to Mulhearn1022

Re: [Connectivity] Jittery Latency (Lehigh Valley)

Mul,

We've got a maintenance scheduled for tomorrow morning. Your service will probably go down around 4am and be back up shortly after that. . Then you should be in really good shape.
--
Bryan Laird
RCN Engineering
Expand your moderator at work

Mulhearn1022

join:2008-06-23
Nazareth, PA

1 edit
reply to negativeduck

Re: [Connectivity] Jittery Latency (Lehigh Valley)

If the maintenance did improve things, it's only a slight improvement. Here's a snapshot of a line quality test and ping test to aggr1.atw.pa.rcn.net, which seems to be the troublesome hop:


Click to Enlarge


The pings always seem to spike at this hop, causing me added latency.

Mulhearn1022

join:2008-06-23
Nazareth, PA
Would ordering a VoIP line change any of this? Because VoIP won't operate well on a line with high latency/jitter.

Mulhearn1022

join:2008-06-23
Nazareth, PA

2 edits
Ping tests taken at various hours since yesterday:


Click to enlarge


While some of them are pretty good, there's a bunch of bad ones still out there yet.

»Software FAQ »How do I make a Screenshot?