I'm writing becuase I think I've exhausted all of the options I can come up with on my end.

My problem started several months ago, but seems to be inconsistent. I often get bad latency spikes on wireless on my home network. I have a DOCSIS3 modem with a D-Link DIR645 router. This prolem has persisted through 3 different modems, and 4 different routers. I've checked my modem signal strength on the local network, and it seems to be within the acceptable thresholds on my end. I don't seem to have many problems when I'm wired (i've got a PS4, Xbox 360 and Xbox One direct wired), but I'm primarily using netflix, so I don't know that i'd notice small latency issues or infrequent dropouts.

The problem seems to be much worse via wifi - I've been running a ping -t for the past 10 minutes or so, and these are my results:

    Packets: Sent = 2020, Received = 1942, Lost = 78 (3% loss),
Approximate round trip times in milli-seconds:
    Minimum = 9ms, Maximum = 3817ms, Average = 300ms

I'm 20 feet from my router at the most. Signal strength is excellent in the bedroom and den. I've tried switching wifi channels, hopping channels, using static channels.. and nothing seems to resolve it. I do have a few other networks in the area, but nothing extreme (i'm in a 6 unit complex). It seems like if I have multiple things streaming at once (IE: netflix in the bedroom, standard browsing, or maybe some audio streams in the den) the problem gets even worse.

I've got a buddy that's a tech that suggested I may have degradation in the lines before it gets to my condo. Every time I've called support I haven't got anywhere, as it looks like the signal is ok on their end.

If anyone can help, or point me to a direction where someone had a similar problem, I'd be very appreciative.

Thanks,

John

I have just recently started experiencing latency issues with my internet due to packet loss. I've run two pathpings that I will attach below, any help to resolve this issue would be appreciated.

First:

C:\Windows\system32>pathping 12.129.222.10

Tracing route to 12.129.222.10 over a maximum of 30 hops

0 Joshua-PC [192.168.1.5]
1 192.168.1.1
2 10.0.0.1
3 174.57.88.1
4 te-1-2-ur01.franklinvill.nj.panjde.comcast.net [68.85.76.17]
5 te-0-3-0-13-ar03.audubon.nj.panjde.comcast.net [68.86.210.109]
6 be-33659-cr02.ashburn.va.ibone.comcast.net [68.86.94.97]
7 he-0-14-0-1-pe07.ashburn.va.ibone.comcast.net [68.86.85.74]
8 192.205.37.41
9 cr2.wswdc.ip.att.net [12.122.134.186]
10 12.123.250.117
11 * * *
Computing statistics for 250 seconds...
Source to Here This Node/Link
Hop RTT Lost/Sent = Pct Lost/Sent = Pct Address
0 Joshua-PC [192.168.1.5]
0/ 100 = 0% |
1 24ms 0/ 100 = 0% 0/ 100 = 0% 192.168.1.1
0/ 100 = 0% |
2 26ms 0/ 100 = 0% 0/ 100 = 0% 10.0.0.1
0/ 100 = 0% |
3 36ms 1/ 100 = 1% 1/ 100 = 1% 174.57.88.1
0/ 100 = 0% |
4 33ms 1/ 100 = 1% 1/ 100 = 1% te-1-2-ur01.franklinvill.nj.panjde
.comcast.net [68.85.76.17]
0/ 100 = 0% |
5 40ms 1/ 100 = 1% 1/ 100 = 1% te-0-3-0-13-ar03.audubon.nj.panjde
.comcast.net [68.86.210.109]
0/ 100 = 0% |
6 37ms 3/ 100 = 3% 3/ 100 = 3% be-33659-cr02.ashburn.va.ibone.com
cast.net [68.86.94.97]
0/ 100 = 0% |
7 44ms 0/ 100 = 0% 0/ 100 = 0% he-0-14-0-1-pe07.ashburn.va.ibone.
comcast.net [68.86.85.74]
2/ 100 = 2% |
8 48ms 2/ 100 = 2% 0/ 100 = 0% 192.205.37.41
98/ 100 = 98% |
9 --- 100/ 100 =100% 0/ 100 = 0% cr2.wswdc.ip.att.net [12.122.134.1
86]
0/ 100 = 0% |
10 --- 100/ 100 =100% 0/ 100 = 0% 12.123.250.117

Trace complete.

C:\Windows\system32>199.108.62.157

Second:

Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.

C:\Windows\system32>pathping 199.108.62.157

Tracing route to 199.108.62.157 over a maximum of 30 hops

0 Joshua-PC [192.168.1.5]
1 192.168.1.1
2 10.0.0.1
3 174.57.88.1
4 te-1-2-ur01.franklinvill.nj.panjde.comcast.net [68.85.76.17]
5 te-0-3-0-13-ar03.audubon.nj.panjde.comcast.net [68.86.210.109]
6 be-33659-cr02.ashburn.va.ibone.comcast.net [68.86.94.97]
7 he-0-13-0-1-pe07.ashburn.va.ibone.comcast.net [68.86.86.54]
8 192.205.37.41
9 cr2.wswdc.ip.att.net [12.122.134.186]
10 12.123.250.113
11 * * *
Computing statistics for 250 seconds...
Source to Here This Node/Link
Hop RTT Lost/Sent = Pct Lost/Sent = Pct Address
0 Joshua-PC [192.168.1.5]
0/ 100 = 0% |
1 25ms 0/ 100 = 0% 0/ 100 = 0% 192.168.1.1
0/ 100 = 0% |
2 26ms 0/ 100 = 0% 0/ 100 = 0% 10.0.0.1
0/ 100 = 0% |
3 40ms 0/ 100 = 0% 0/ 100 = 0% 174.57.88.1
0/ 100 = 0% |
4 36ms 1/ 100 = 1% 1/ 100 = 1% te-1-2-ur01.franklinvill.nj.panjde
.comcast.net [68.85.76.17]
0/ 100 = 0% |
5 40ms 0/ 100 = 0% 0/ 100 = 0% te-0-3-0-13-ar03.audubon.nj.panjde
.comcast.net [68.86.210.109]
0/ 100 = 0% |
6 46ms 0/ 100 = 0% 0/ 100 = 0% be-33659-cr02.ashburn.va.ibone.com
cast.net [68.86.94.97]
0/ 100 = 0% |
7 41ms 4/ 100 = 4% 4/ 100 = 4% he-0-13-0-1-pe07.ashburn.va.ibone.
comcast.net [68.86.86.54]
0/ 100 = 0% |
8 44ms 0/ 100 = 0% 0/ 100 = 0% 192.205.37.41
100/ 100 =100% |
9 --- 100/ 100 =100% 0/ 100 = 0% cr2.wswdc.ip.att.net [12.122.134.1
86]
0/ 100 = 0% |
10 --- 100/ 100 =100% 0/ 100 = 0% 12.123.250.113

Trace complete.

C:\Windows\system32>

Today I am unable to resove baa2.st.dhs.gov   It will resolve on other ISPs such as ATT and Verizon.  I talked to the Department of Homeland Security (DHS) and they can resolve it on their end too.

This looks like a Comcast issue.  Who can I contact to investigate? 

Could this be a DNS problem, or related to the DNS-SEC issue found here?

http://forums.xfinity.com/t5/Basic-Internet-Connectivity-And/DNS-oddity/m-p/2530778/highlight/true#M226869

Dave

My speeds are not currently anywhere near what I'am paying for. Here are some examples

http://results.speedtest.comcast.net/result/922084204.png

http://www.speedtest.net/my-result/4412120533

and now it is better

http://www.speedtest.net/my-result/4412131674

http://results.speedtest.comcast.net/result/922091344.png

 What causes this inconsitency in service?

I'm up in Canton and there were a few outages this week. One lasted several hours. 

After the outage, my cable modem (Zoom) would sync up fine, then lose the up/down stream locks. I called customer support, they walked me through the reset process, which I'd done already myself before calling. I asked the support guy to please send my modem another reset, which he did. That final one did it and everything connected just fine.

However, since then I've noticed my maximum speed is 20mbps up/down according to http://speedtest.net (which I believe Comcast owns). And now I am experiencing unjustified latency in many areas (web browsing, ssh, image loading, etc.). 

Of course, being a network engineer, I investigated the situation and found that I can no longer traceroute from my machines past the Comcast gateway:

user@azrael:/home/user$ traceroute www.yahoo.com

traceroute to fd-fp3.wg1.b.yahoo.com (98.139.180.149), 64 hops max
1 192.168.66.1 2.331ms 1.667ms 1.952ms
2 96.120.4.125 9.107ms 0.904ms !H 8.936ms

That's it. Every traceroute is the same. So what's going on Comcast? Are you balancing my content? I no longer have direct access without going a mysteriously, possibly nefarious, black box? I'm not happy about this at all.

Please fix my speed.

Issue #2. My account is listed with two modems. One of which I do not have (an AR something) and, on top of that, I believe you're billing me for it. Please remove this from my bill and I would like a credit for the year of billing me for a rental I don't have.

this company is nothing but a bunch of thieves no deferent than AT&T

Hi, I play League of Legends, but I can't play anymore with ping spikes.

I think It happend since a major outage on westcoast.

here's a comparison..

Reply from 216.52.241.254: bytes=32 time=35ms TTL=244
Reply from 216.52.241.254: bytes=32 time=36ms TTL=244
Reply from 216.52.241.254: bytes=32 time=52ms TTL=244
Reply from 216.52.241.254: bytes=32 time=115ms TTL=244
Reply from 216.52.241.254: bytes=32 time=62ms TTL=244
Reply from 216.52.241.254: bytes=32 time=34ms TTL=244
Reply from 216.52.241.254: bytes=32 time=34ms TTL=244
Reply from 216.52.241.254: bytes=32 time=36ms TTL=244
Reply from 216.52.241.254: bytes=32 time=34ms TTL=244
Reply from 216.52.241.254: bytes=32 time=38ms TTL=244
Reply from 216.52.241.254: bytes=32 time=35ms TTL=244
Reply from 216.52.241.254: bytes=32 time=35ms TTL=244
Reply from 216.52.241.254: bytes=32 time=35ms TTL=244
Reply from 216.52.241.254: bytes=32 time=46ms TTL=244
Reply from 216.52.241.254: bytes=32 time=115ms TTL=244
Reply from 216.52.241.254: bytes=32 time=34ms TTL=244

Ping statistics for 216.52.241.254:
Packets: Sent = 623, Received = 616, Lost = 7 (1% loss),
Approximate round trip times in milli-seconds:
Minimum = 33ms, Maximum = 652ms, Average = 42ms

-> very unstable..

Reply from 8.8.8.8: bytes=32 time=11ms TTL=56
Reply from 8.8.8.8: bytes=32 time=20ms TTL=56
Reply from 8.8.8.8: bytes=32 time=12ms TTL=56
Reply from 8.8.8.8: bytes=32 time=12ms TTL=56
Reply from 8.8.8.8: bytes=32 time=12ms TTL=56
Reply from 8.8.8.8: bytes=32 time=12ms TTL=56
Reply from 8.8.8.8: bytes=32 time=10ms TTL=56
Reply from 8.8.8.8: bytes=32 time=10ms TTL=56
Reply from 8.8.8.8: bytes=32 time=10ms TTL=56
Reply from 8.8.8.8: bytes=32 time=26ms TTL=56
Reply from 8.8.8.8: bytes=32 time=13ms TTL=56
Reply from 8.8.8.8: bytes=32 time=13ms TTL=56
Reply from 8.8.8.8: bytes=32 time=9ms TTL=56
Reply from 8.8.8.8: bytes=32 time=11ms TTL=56
Reply from 8.8.8.8: bytes=32 time=11ms TTL=56
Reply from 8.8.8.8: bytes=32 time=10ms TTL=56
Reply from 8.8.8.8: bytes=32 time=12ms TTL=56

Ping statistics for 8.8.8.8:
Packets: Sent = 327, Received = 327, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 8ms, Maximum = 26ms, Average = 11ms

This is google server, and very good..

So,, Who's fault??? comcast or league of legends??

Greetings,

After upgrding my modem, my pings to comcasts speedtest are now 140ms+ instead of the typical 40ms they were before. Connection is spotty as well. I'll post info below, if anyone could check it for any obvious defects. Thanks in advance for any assitance

I have blast service and am getting 5mbs d/l and around 12mbs upload

http://results.speedtest.comcast.net/result/922433164.png

Voice and Data Modem
Make & Model: CISCO dpc3941t

Upstream
Channel Bonding Value
Index
1
2
3
Lock Status
Locked
Locked
Locked
Frequency
34 MHz
21 MHz
27 MHz
Symbol Rate
5120 KSym/sec
5120 KSym/sec
5120 KSym/sec
Power Level
52.750 dBmV
50.500 dBmV
51.500 dBmV
Modulation
64 QAM
16 QAM
64 QAM
Channel ID
57
59
58

Downstream
Channel Bonding Value
Index
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Lock Status
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Frequency
561 MHz
567 MHz
573 MHz
579 MHz
585 MHz
591 MHz
597 MHz
603 MHz
609 MHz
615 MHz
621 MHz
627 MHz
633 MHz
639 MHz
645 MHz
651 MHz
SNR
40.946 dB
40.366 dB
40.366 dB
40.946 dB
40.366 dB
40.946 dB
40.366 dB
40.366 dB
40.946 dB
40.366 dB
40.366 dB
40.366 dB
40.366 dB
40.946 dB
40.366 dB
40.366 dB
Power
1.300 dBmV
1.100 dBmV
1.000 dBmV
0.900 dBmV
0.800 dBmV
0.500 dBmV
0.400 dBmV
0.500 dBmV
0.100 dBmV
-0.100 dBmV
0.500 dBmV
0.900 dBmV
0.500 dBmV
0.400 dBmV
0.700 dBmV
1.300 dBmV
Modulation
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM

Cable Modem

HW Version:1.0
Vendor:Cisco
BOOT Version:3.4.19.1
Core Version:2.6.39.3
ModelPC3941T
Product Type:XB3
Flash Part:128 MB
Download Version:dpc3941-P20-18-v303r20421622-141112a-CMCST
Serial Number:272699455

nitialization Procedure

Initialize Hardware:Complete
Acquire Downstream Channel:Complete
Upstream Ranging:Complete
DHCP bound:Complete
Set Time-of-Day:Complete
Configuration File Download:Complete
Registration:Complete

CM Error Codewords
Unerrored Codewords
3831985811
3831985811
3831985811
3831985811
3831985811
3831985811
3831985811
3831985811
3831985811
3831985811
3831985811
3831985811
3831985811
3831985811
3831985811
3831985811
Correctable Codewords
917
917
917
917
917
917
917
917
917
917
917
917
917
917
917
917
Uncorrectable Codewords
14725
14725
14725
14725
14725
14725
14725
14725
14725
14725
14725
14725
14725
14725
14725
14725

Microsoft Windows [Version 6.3.9600]
(c) 2013 Microsoft Corporation. All rights reserved.

C:\Users\>tracert www.comcast.net

Tracing route to a1526.dscg.akamai.net [2600:1403:12::170e:5518]
over a maximum of 30 hops:

1 5 ms 9 ms 6 ms 2601:0:5b80:479:7454:7dff:fea4:5473
2 15 ms 15 ms 12 ms 2001:558:6041:17::1
3 20 ms 13 ms 12 ms te-0-6-0-2-ur03.charleston.sc.chrlstn.comcast.net [2001:558:152:46::]
4 21 ms 13 ms 21 ms te-4-3-ar01.charleston.sc.chrlstn.comcast.net [2001:558:150:9::1]
5 21 ms 18 ms 18 ms xe-0-0-4-0-ar05.savannah.ga.savannah.comcast.net[2001:558:2e0:1::1]
6 27 ms 23 ms 33 ms te-0-11-0-4-ar02.southside.fl.jacksvil.comcast.net [2001:558:190:3b::1]
7 36 ms 33 ms 34 ms be-33489-cr01.miami.fl.ibone.comcast.net [2001:558:0:f7cb::1]
8 34 ms 29 ms 29 ms be-13-pe02.111eighthave.ny.ibone.comcast.net [2001:558:0:f893::2]
9 56 ms 31 ms 29 ms 2001:559::10e
10 32 ms 28 ms 34 ms 2600:1403:12::170e:5518

Trace complete.

C:\Users\>ping -t www.comcast.net

Pinging a1526.dscg.akamai.net [2600:1403:12::170e:5518] with 32 bytes of data:
Reply from 2600:1403:12::170e:5518: time=28ms
Reply from 2600:1403:12::170e:5518: time=27ms
Reply from 2600:1403:12::170e:5518: time=32ms
Reply from 2600:1403:12::170e:5518: time=36ms
Reply from 2600:1403:12::170e:5518: time=31ms
Reply from 2600:1403:12::170e:5518: time=40ms
Reply from 2600:1403:12::170e:5518: time=29ms
Reply from 2600:1403:12::170e:5518: time=28ms
Reply from 2600:1403:12::170e:5518: time=38ms
Reply from 2600:1403:12::170e:5518: time=27ms
Reply from 2600:1403:12::170e:5518: time=37ms
Reply from 2600:1403:12::170e:5518: time=36ms
Reply from 2600:1403:12::170e:5518: time=43ms
Reply from 2600:1403:12::170e:5518: time=35ms
Reply from 2600:1403:12::170e:5518: time=27ms
Reply from 2600:1403:12::170e:5518: time=28ms
Reply from 2600:1403:12::170e:5518: time=28ms
Reply from 2600:1403:12::170e:5518: time=327ms
Reply from 2600:1403:12::170e:5518: time=32ms
Reply from 2600:1403:12::170e:5518: time=87ms
Reply from 2600:1403:12::170e:5518: time=60ms
Reply from 2600:1403:12::170e:5518: time=34ms
Reply from 2600:1403:12::170e:5518: time=38ms
Reply from 2600:1403:12::170e:5518: time=28ms
Reply from 2600:1403:12::170e:5518: time=26ms
Reply from 2600:1403:12::170e:5518: time=37ms
Reply from 2600:1403:12::170e:5518: time=31ms
Reply from 2600:1403:12::170e:5518: time=30ms
Reply from 2600:1403:12::170e:5518: time=35ms
Reply from 2600:1403:12::170e:5518: time=29ms
Reply from 2600:1403:12::170e:5518: time=30ms
Reply from 2600:1403:12::170e:5518: time=31ms
Reply from 2600:1403:12::170e:5518: time=30ms
Reply from 2600:1403:12::170e:5518: time=29ms
Reply from 2600:1403:12::170e:5518: time=44ms
Reply from 2600:1403:12::170e:5518: time=33ms
Reply from 2600:1403:12::170e:5518: time=32ms
Reply from 2600:1403:12::170e:5518: time=37ms
Reply from 2600:1403:12::170e:5518: time=28ms
Reply from 2600:1403:12::170e:5518: time=37ms
Reply from 2600:1403:12::170e:5518: time=32ms
Reply from 2600:1403:12::170e:5518: time=29ms
Reply from 2600:1403:12::170e:5518: time=38ms
Reply from 2600:1403:12::170e:5518: time=27ms
Reply from 2600:1403:12::170e:5518: time=37ms
Reply from 2600:1403:12::170e:5518: time=31ms
Reply from 2600:1403:12::170e:5518: time=31ms
Reply from 2600:1403:12::170e:5518: time=30ms
Reply from 2600:1403:12::170e:5518: time=69ms
Reply from 2600:1403:12::170e:5518: time=44ms
Reply from 2600:1403:12::170e:5518: time=28ms
Reply from 2600:1403:12::170e:5518: time=35ms
Reply from 2600:1403:12::170e:5518: time=28ms
Reply from 2600:1403:12::170e:5518: time=32ms
Reply from 2600:1403:12::170e:5518: time=36ms
Reply from 2600:1403:12::170e:5518: time=31ms
Reply from 2600:1403:12::170e:5518: time=35ms
Reply from 2600:1403:12::170e:5518: time=39ms
Reply from 2600:1403:12::170e:5518: time=29ms
Reply from 2600:1403:12::170e:5518: time=33ms
Reply from 2600:1403:12::170e:5518: time=28ms
Reply from 2600:1403:12::170e:5518: time=34ms
Reply from 2600:1403:12::170e:5518: time=56ms
Reply from 2600:1403:12::170e:5518: time=52ms
Reply from 2600:1403:12::170e:5518: time=28ms
Reply from 2600:1403:12::170e:5518: time=42ms
Reply from 2600:1403:12::170e:5518: time=126ms
Reply from 2600:1403:12::170e:5518: time=36ms
Reply from 2600:1403:12::170e:5518: time=32ms
Reply from 2600:1403:12::170e:5518: time=32ms
Reply from 2600:1403:12::170e:5518: time=31ms
Reply from 2600:1403:12::170e:5518: time=31ms
Reply from 2600:1403:12::170e:5518: time=35ms
Reply from 2600:1403:12::170e:5518: time=34ms

Ping statistics for 2600:1403:12::170e:5518:
Packets: Sent = 74, Received = 74, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 26ms, Maximum = 327ms, Average = 40ms

I am paying for Internet speed of 50 Mbps and got DOCSIS 3.0 modem. Laterly, for past two months, I am getting only 10 Mbps. I have talked to lot of agents and made complaint but nobody cares.

http://results.speedtest.comcast.net/result/922328704.png

Can someone from Support looking into this?

Does anyone has got email of support team?

Thanks.

I have the entry level internet service and had been runiing on a DOCSIS 2 Motorola Surfboard for some time. Last year in anticipation of improving the service, I replaced it with a Cisco Docsis 3 modem which was installed and working fine. I just went to upgrade the service to one of the higher supported speeds and while I can add the service to the cart there is NO WAY to remove the $10 a month Comcast modem that I don't need. There is an "Edit" option that does nothing but return to this screen: What's the solution here?

 What are my speeds supposed to  be for Performance Starter? I want to get what I'm paying for

the Ientel wifi is runing my xfinity wifi if i tune it off it tune off my xfinity to and i did not set it up to do that at start that in the last 6 hrs i have try to go to my Ientel setting to get it to stop runing it that way and it well not stop can you tell me how it just start that in the last 6 hrs when it has not ben set up to work that from the start so it tell me that some one has go in to my computer and i do not like that at all and i am the one live here and on this  on computer so i well be looking for your he for you to get back to me on this and i do meet like now get it

How do I retrieve my WiFi password?