Slow Speeds - Xfinity Gigabit Internet

Question

Looking for help:Since i upgraded to gigabit service with xfinity, I haven't topped 100mbps download speeds. I'll provide my cable connection stats below to see if someone can provide input. After researching for hours, I've realized that majority of my connections are pretty good. The only thing that sticks out is the correctable Downstream OFDM Channels. I don't really understand what that means, I'm just trying to figure out the culprit of the slow speeds (wiring of my house or a technical issue that can be resolved with Xfinity/Netgear support)&nbsp;Stats below:Frequency start ValueThis field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. Enter the new start frequency and restart the cable modem for it to take effect.Starting Frequency&lt;tabindex=-1&gt;Startup Procedure&lt;/tabindex=-1&gt;ProcedureStatusCommentAcquire Downstream Channel645000000 HzLockedConnectivity StateOKOperationalBoot StateOKOperationalSecurityEnableBPI+IP Provisioning ModeHonor MDDIPv6 only&lt;tabindex=-1&gt;Downstream Bonded Channels&lt;/tabindex=-1&gt;ChannelLock StatusModulationChannel IDFrequencyPowerSNR / MERUnerrored CodewordsCorrectable CodewordsUncorrectable Codewords1LockedQAM25637645000000 Hz4.8 dBmV41.4 dB586828586002LockedQAM2569477000000 Hz7.1 dBmV42.8 dB585596267003LockedQAM25610483000000 Hz7.0 dBmV42.8 dB585600351004LockedQAM25611489000000 Hz7.0 dBmV42.8 dB585604304005LockedQAM25612495000000 Hz7.1 dBmV42.9 dB585607991006LockedQAM25613501000000 Hz7.1 dBmV42.8 dB585611062007LockedQAM25614507000000 Hz7.1 dBmV42.8 dB585615382008LockedQAM25615513000000 Hz7.3 dBmV42.7 dB585618647009LockedQAM25616519000000 Hz7.2 dBmV42.7 dB5856242780010LockedQAM25617525000000 Hz7.3 dBmV42.8 dB5856278270011LockedQAM25618531000000 Hz7.3 dBmV42.8 dB5856316550012LockedQAM25619537000000 Hz7.2 dBmV42.8 dB5856355570013LockedQAM25620543000000 Hz7.1 dBmV42.7 dB5856392260014LockedQAM25621549000000 Hz7.2 dBmV42.6 dB5856422700015LockedQAM25622555000000 Hz7.0 dBmV42.5 dB5856471550016LockedQAM25623561000000 Hz6.9 dBmV42.3 dB5856505090017LockedQAM25624567000000 Hz6.6 dBmV42.3 dB5856568840018LockedQAM25625573000000 Hz6.4 dBmV42.3 dB5856607980019LockedQAM25626579000000 Hz5.9 dBmV42.1 dB5856647130020LockedQAM25627585000000 Hz5.8 dBmV42.0 dB5856682190021LockedQAM25628591000000 Hz5.8 dBmV41.9 dB5856717250022LockedQAM25629597000000 Hz5.5 dBmV41.6 dB5856756600023LockedQAM25630603000000 Hz5.3 dBmV41.5 dB5856790920024LockedQAM25631609000000 Hz4.9 dBmV41.5 dB5856822500025LockedQAM25632615000000 Hz4.4 dBmV41.3 dB5856869150026LockedQAM25633621000000 Hz4.2 dBmV41.1 dB5856897600027LockedQAM25634627000000 Hz4.2 dBmV41.1 dB5856936510028LockedQAM25635633000000 Hz4.4 dBmV41.0 dB5856981020029LockedQAM25636639000000 Hz4.5 dBmV41.0 dB5857015350030LockedQAM25638651000000 Hz4.8 dBmV41.2 dB5857033830031LockedQAM25639657000000 Hz4.8 dBmV41.4 dB5857045390032LockedQAM25640663000000 Hz5.1 dBmV41.4 dB58570641000&lt;tabindex=-1&gt;Upstream Bonded Channels&lt;/tabindex=-1&gt;ChannelLock StatusModulationChannel IDFrequencyPower1LockedATDMA135800000 Hz47.3 dBmV2LockedATDMA229400000 Hz47.3 dBmV3LockedATDMA323000000 Hz47.3 dBmV4LockedATDMA416600000 Hz47.3 dBmV5Not LockedUnknown00 Hz0.0 dBmV6Not LockedUnknown00 Hz0.0 dBmV7Not LockedUnknown00 Hz0.0 dBmV8Not LockedUnknown00 Hz0.0 dBmV&lt;tabindex=-1&gt;Downstream OFDM Channels&lt;/tabindex=-1&gt;ChannelLock StatusModulation / Profile IDChannel IDFrequencyPowerSNR / MERActive Subcarrier Number RangeUnerrored CodewordsCorrectable CodewordsUncorrectable Codewords1Locked0, 1159690000000 Hz5.7 dBmV40.0 dB1246 ~ 2849442088587994173902Not Locked000 Hz6.4 dBmV0.0 dB0 ~ 4095000&lt;tabindex=-1&gt;Upstream OFDMA Channels&lt;/tabindex=-1&gt;ChannelLock StatusModulation / Profile IDChannel IDFrequencyPower1Not LockedUnknown00 Hz0 dBmV2Not LockedUnknown00 Hz0 dBmV&nbsp;&nbsp;&nbsp;Any feedback would be greatly appreciated!

CooyonLA · Answer

Just realizing it cut off&nbsp;&lt;tabindex=-1&gt;Downstream OFDM Channels&lt;/tabindex=-1&gt;ChannelLock StatusModulation / Profile IDChannel IDFrequencyPowerSNR / MERActive Subcarrier Number RangeUnerrored CodewordsCorrectable CodewordsUncorrectable Codewords1Locked0, 1159690000000 Hz5.7 dBmV40.0 dB1246 ~ 2849442088587994173902Not Locked000 Hz6.4 dBmV0.0 dB0 ~ 4095000&nbsp;Correctable Codeword= 9941739

FURRYe38 · Answer

Have the ISP check the signal and line quality UP to the modem.
Be sure there are not coax cable line splitters in the between the modem and ISP service box.
Be sure your using good quality RG6 coax cable up to the modem.

plemans · Answer

How are you testing this?do you have a pc hardwired into the modem?&nbsp;What pc is it? Is it a gigabit pc?&nbsp;Have you checked the cable to ensure it supports gigabit? standard cat5 doesnt. Cat5e doesWhat site are you speedtesting on?I've had the isp provision a modem wrong. Might be worth checking with xfinity to ensure it has the proper provisioning.&nbsp;

CooyonLA · Answer

Hi,I run speed tests through speednet, xfinity app, etc. Turn my VPN on and essentially same resultsYes, I hardwired into my modem. I'll get about 105mbps hardwired to modem. 95mbps hardwired to routerI have a brand new PC I-7 9700K with gigabit capabilities. I ran a cat 6e wire from my router, into the attic, to my office about 3 weeks ago to see if that would help. I had the Netgear Powerline adapter's before and honestly think i was getting better speeds (130mbps) using the adapters.&nbsp;&nbsp;And i will reach out to xfinity about the provision.&nbsp;Just a little background information. I bought my house in July 2019. The previous homeowner stated that he had xfinity service. So, I placed a contract online and hooked up my own equipment. I'm thinking that the cable wiring might be old/outdated. The wiring runs around the perimeter of the house with cable entries into my kitchen, living room, and 2 bedrooms. So might be too many splitters?

plemans · Answer

do you have another device you could test right at the modem? plus then you can also try different ethernet cords to make sure it isn't a wire issue.&nbsp;

Forum Discussion

Slow Speeds - Xfinity Gigabit Internet

5 Replies

Procedure	Status	Comment
Acquire Downstream Channel	645000000 Hz	Locked
Connectivity State	OK	Operational
Boot State	OK	Operational
Security	Enable	BPI+
IP Provisioning Mode	Honor MDD	IPv6 only

Channel	Lock Status	Modulation	Channel ID	Frequency	Power	SNR / MER	Unerrored Codewords	Correctable Codewords	Uncorrectable Codewords
1	Locked	QAM256	37	645000000 Hz	4.8 dBmV	41.4 dB	586828586	0	0
2	Locked	QAM256	9	477000000 Hz	7.1 dBmV	42.8 dB	585596267	0	0
3	Locked	QAM256	10	483000000 Hz	7.0 dBmV	42.8 dB	585600351	0	0
4	Locked	QAM256	11	489000000 Hz	7.0 dBmV	42.8 dB	585604304	0	0
5	Locked	QAM256	12	495000000 Hz	7.1 dBmV	42.9 dB	585607991	0	0
6	Locked	QAM256	13	501000000 Hz	7.1 dBmV	42.8 dB	585611062	0	0
7	Locked	QAM256	14	507000000 Hz	7.1 dBmV	42.8 dB	585615382	0	0
8	Locked	QAM256	15	513000000 Hz	7.3 dBmV	42.7 dB	585618647	0	0
9	Locked	QAM256	16	519000000 Hz	7.2 dBmV	42.7 dB	585624278	0	0
10	Locked	QAM256	17	525000000 Hz	7.3 dBmV	42.8 dB	585627827	0	0
11	Locked	QAM256	18	531000000 Hz	7.3 dBmV	42.8 dB	585631655	0	0
12	Locked	QAM256	19	537000000 Hz	7.2 dBmV	42.8 dB	585635557	0	0
13	Locked	QAM256	20	543000000 Hz	7.1 dBmV	42.7 dB	585639226	0	0
14	Locked	QAM256	21	549000000 Hz	7.2 dBmV	42.6 dB	585642270	0	0
15	Locked	QAM256	22	555000000 Hz	7.0 dBmV	42.5 dB	585647155	0	0
16	Locked	QAM256	23	561000000 Hz	6.9 dBmV	42.3 dB	585650509	0	0
17	Locked	QAM256	24	567000000 Hz	6.6 dBmV	42.3 dB	585656884	0	0
18	Locked	QAM256	25	573000000 Hz	6.4 dBmV	42.3 dB	585660798	0	0
19	Locked	QAM256	26	579000000 Hz	5.9 dBmV	42.1 dB	585664713	0	0
20	Locked	QAM256	27	585000000 Hz	5.8 dBmV	42.0 dB	585668219	0	0
21	Locked	QAM256	28	591000000 Hz	5.8 dBmV	41.9 dB	585671725	0	0
22	Locked	QAM256	29	597000000 Hz	5.5 dBmV	41.6 dB	585675660	0	0
23	Locked	QAM256	30	603000000 Hz	5.3 dBmV	41.5 dB	585679092	0	0
24	Locked	QAM256	31	609000000 Hz	4.9 dBmV	41.5 dB	585682250	0	0
25	Locked	QAM256	32	615000000 Hz	4.4 dBmV	41.3 dB	585686915	0	0
26	Locked	QAM256	33	621000000 Hz	4.2 dBmV	41.1 dB	585689760	0	0
27	Locked	QAM256	34	627000000 Hz	4.2 dBmV	41.1 dB	585693651	0	0
28	Locked	QAM256	35	633000000 Hz	4.4 dBmV	41.0 dB	585698102	0	0
29	Locked	QAM256	36	639000000 Hz	4.5 dBmV	41.0 dB	585701535	0	0
30	Locked	QAM256	38	651000000 Hz	4.8 dBmV	41.2 dB	585703383	0	0
31	Locked	QAM256	39	657000000 Hz	4.8 dBmV	41.4 dB	585704539	0	0
32	Locked	QAM256	40	663000000 Hz	5.1 dBmV	41.4 dB	585706410	0	0

Channel	Lock Status	Modulation / Profile ID	Channel ID	Frequency	Power	SNR / MER	Active Subcarrier Number Range	Unerrored Codewords	Correctable Codewords	Uncorrectable Codewords
1	Locked	0, 1	159	690000000 Hz	5.7 dBmV	40.0 dB	1246 ~ 2849	442088587	9941739	0
2	Not Locked	0	0	0 Hz	6.4 dBmV	0.0 dB	0 ~ 4095	0	0	0