topic Re: Paying for 600Mbps, Getting less than half. CM1000 modem + Nighthawk AC1900 router in Your Home Network
https://forums.xfinity.com/t5/Your-Home-Network/Paying-for-600Mbps-Getting-less-than-half-CM1000-modem/m-p/3386798#M338027
Thanks.<BR /><BR />I think I was able to solve my problem, but I don’t know if I solved it so much as I bypassed it.<BR /><BR />I had an extra modem and router that were the same models as the one’s I’ve been struggling with, so I decided to swap them out one by one to see if that made a difference. Changing modems made no difference, but switching out the router did make a small difference—nothing drastic though.<BR /><BR />I went to the store and bought a very inexpensive wifi-6 router, and suddenly my WiFi speeds are at full capacity! I’m clocking in now at 580 mbps when I stand next to the router. The hard line speeds are still coming in at 100 and lower, thought, and they did not change across the two modems and three routers. I’m starting to think it has something to do with my computer and not my boxes. I’ll have to try connecting in with a different laptop soon to see if that makes a difference.<BR /><BR />Thanks everyoneWed, 18 Nov 2020 06:50:17 GMTbanjo_viking2020-11-18T06:50:17ZPaying for 600Mbps, Getting less than half. CM1000 modem + Nighthawk AC1900 router
https://forums.xfinity.com/t5/Your-Home-Network/Paying-for-600Mbps-Getting-less-than-half-CM1000-modem/m-p/3386565#M337971
<P>This issue has already consumer hours of my time and has forced me to get an advanced education in routers and modems that I never wanted. When I stand next to my router on 5G bands, I should be able to get something close to the 600Mbps I am paying for, but I can only get a max of 150-280Mbps (using multiple speed test sites). Not bad, but nowhere near where it should be. When the Xfinity techs plug in their own Gateway modem/router, low and behold they get 450-580. Something is up.</P><P> </P><P>I've done ALL the standard procedures (power cycling, ordering, replacing Cat5 with Cat6, checking power adapters, etc.)</P><P> </P><P>My house is a brand new construction (2020), so I doubt it's a cable. We don't have TV, so there is no cable splitting. Techs confirmed I'm getting "beautiful" signals to the house, and they have no issues with their modem/router, so I have to think it's my modem.</P><P> </P><P>My modem is a recommended model per Xfinity. CM1000 Docsis 3.1. It's speaking fine with the router, which is an R7000 Nighthawk (AC1900). Again, more than capable of handling the speeds. All firmeware is up to date, per the Netgear techs.</P><P> </P><P>Some irregularities I've noticed:</P><P> </P><UL><LI>The wifi speed is MUCH faster than the Ethernet speed, which sits around 100 or less. I've only tested on one laptop, so there's a chance the modem ethernet port or the laptop ethernet port are capped at 100Mbps, but that seems less likely to me for a CM1000 and a 2017 laptop. The Ethernet speeds are the same whether I'm plugged into the router or directly into the modem.</LI></UL><P> </P><UL><LI>I'm only getting 4 upstream channel bonds. Not sure if I should be getting more.</LI></UL><P> </P><UL><LI>My log keeps throwing a dynamic range window violation code saying my power is too high, which you can confirm below, but it doesn't appear to be a major interruption to service. I've yet to notice dropped internet, only slower internet than I should be getting.</LI></UL><P> </P><P>At this point, I'm thinking new modem, new router, or both. But I just bought this setup so I would hate to giveup on it too easily. Any advice would be stupendous. Thanks</P><P> </P><TABLE><TBODY><TR><TD><HR /></TD></TR><TR><TD><STRONG><tabindex=-1>Startup Procedure</tabindex=-1></STRONG></TD></TR><TR><TD><TABLE border="1" cellspacing="0" cellpadding="2"><TBODY><TR><TD><SPAN class="thead"><STRONG>Procedure</STRONG></SPAN></TD><TD><SPAN class="thead"><STRONG>Status</STRONG></SPAN></TD><TD><SPAN class="thead"><STRONG>Comment</STRONG></SPAN></TD></TR><TR><TD>Acquire Downstream Channel</TD><TD>573000000 Hz</TD><TD>Locked</TD></TR><TR><TD>Connectivity State</TD><TD>OK</TD><TD>Operational</TD></TR><TR><TD>Boot State</TD><TD>OK</TD><TD>Operational</TD></TR><TR><TD>Security</TD><TD>Enable</TD><TD>BPI+</TD></TR><TR><TD>IP Provisioning Mode</TD><TD>Honor MDD</TD><TD>IPv6 only</TD></TR></TBODY></TABLE></TD></TR><TR><TD><HR /></TD></TR><TR><TD><STRONG><tabindex=-1>Downstream Bonded Channels</tabindex=-1></STRONG></TD></TR><TR><TD><DIV class="in-frame-table"><TABLE border="1" cellspacing="0" cellpadding="2"><TBODY><TR><TD><SPAN class="thead">Channel</SPAN></TD><TD><SPAN class="thead">Lock Status</SPAN></TD><TD><SPAN class="thead">Modulation</SPAN></TD><TD><SPAN class="thead">Channel ID</SPAN></TD><TD><SPAN class="thead">Frequency</SPAN></TD><TD><SPAN class="thead">Power</SPAN></TD><TD><SPAN class="thead">SNR / MER</SPAN></TD><TD><SPAN class="thead">Unerrored Codewords</SPAN></TD><TD><SPAN class="thead">Correctable Codewords</SPAN></TD><TD><SPAN class="thead">Uncorrectable Codewords</SPAN></TD></TR><TR><TD>1</TD><TD>Locked</TD><TD>QAM256</TD><TD>25</TD><TD>573000000 Hz</TD><TD>8.2 dBmV</TD><TD>40.5 dB</TD><TD>52706848</TD><TD>11</TD><TD>23</TD></TR><TR><TD>2</TD><TD>Locked</TD><TD>QAM256</TD><TD>13</TD><TD>501000000 Hz</TD><TD>9.0 dBmV</TD><TD>41.0 dB</TD><TD>60886218</TD><TD>25</TD><TD>8</TD></TR><TR><TD>3</TD><TD>Locked</TD><TD>QAM256</TD><TD>14</TD><TD>507000000 Hz</TD><TD>9.4 dBmV</TD><TD>40.9 dB</TD><TD>60891019</TD><TD>15</TD><TD>19</TD></TR><TR><TD>4</TD><TD>Locked</TD><TD>QAM256</TD><TD>15</TD><TD>513000000 Hz</TD><TD>8.9 dBmV</TD><TD>40.9 dB</TD><TD>60894264</TD><TD>25</TD><TD>0</TD></TR><TR><TD>5</TD><TD>Locked</TD><TD>QAM256</TD><TD>16</TD><TD>519000000 Hz</TD><TD>8.8 dBmV</TD><TD>40.8 dB</TD><TD>60897561</TD><TD>28</TD><TD>4</TD></TR><TR><TD>6</TD><TD>Locked</TD><TD>QAM256</TD><TD>17</TD><TD>525000000 Hz</TD><TD>9.0 dBmV</TD><TD>40.7 dB</TD><TD>60901251</TD><TD>30</TD><TD>0</TD></TR><TR><TD>7</TD><TD>Locked</TD><TD>QAM256</TD><TD>18</TD><TD>531000000 Hz</TD><TD>8.8 dBmV</TD><TD>40.8 dB</TD><TD>60906027</TD><TD>10</TD><TD>24</TD></TR><TR><TD>8</TD><TD>Locked</TD><TD>QAM256</TD><TD>19</TD><TD>537000000 Hz</TD><TD>8.8 dBmV</TD><TD>40.8 dB</TD><TD>60908896</TD><TD>30</TD><TD>0</TD></TR><TR><TD>9</TD><TD>Locked</TD><TD>QAM256</TD><TD>20</TD><TD>543000000 Hz</TD><TD>8.7 dBmV</TD><TD>40.7 dB</TD><TD>60919582</TD><TD>27</TD><TD>6</TD></TR><TR><TD>10</TD><TD>Locked</TD><TD>QAM256</TD><TD>21</TD><TD>549000000 Hz</TD><TD>8.2 dBmV</TD><TD>40.5 dB</TD><TD>60926039</TD><TD>10</TD><TD>24</TD></TR><TR><TD>11</TD><TD>Locked</TD><TD>QAM256</TD><TD>22</TD><TD>555000000 Hz</TD><TD>8.5 dBmV</TD><TD>40.6 dB</TD><TD>60929568</TD><TD>17</TD><TD>16</TD></TR><TR><TD>12</TD><TD>Locked</TD><TD>QAM256</TD><TD>23</TD><TD>561000000 Hz</TD><TD>8.6 dBmV</TD><TD>40.6 dB</TD><TD>60932399</TD><TD>20</TD><TD>12</TD></TR><TR><TD>13</TD><TD>Locked</TD><TD>QAM256</TD><TD>24</TD><TD>567000000 Hz</TD><TD>7.9 dBmV</TD><TD>40.4 dB</TD><TD>60937218</TD><TD>27</TD><TD>0</TD></TR><TR><TD>14</TD><TD>Locked</TD><TD>QAM256</TD><TD>1</TD><TD>411000000 Hz</TD><TD>8.7 dBmV</TD><TD>40.8 dB</TD><TD>50828218</TD><TD>32</TD><TD>0</TD></TR><TR><TD>15</TD><TD>Locked</TD><TD>QAM256</TD><TD>26</TD><TD>579000000 Hz</TD><TD>8.5 dBmV</TD><TD>40.5 dB</TD><TD>60944562</TD><TD>15</TD><TD>19</TD></TR><TR><TD>16</TD><TD>Locked</TD><TD>QAM256</TD><TD>27</TD><TD>585000000 Hz</TD><TD>7.8 dBmV</TD><TD>40.3 dB</TD><TD>60948429</TD><TD>11</TD><TD>23</TD></TR><TR><TD>17</TD><TD>Locked</TD><TD>QAM256</TD><TD>28</TD><TD>591000000 Hz</TD><TD>8.0 dBmV</TD><TD>40.5 dB</TD><TD>60970782</TD><TD>11</TD><TD>24</TD></TR><TR><TD>18</TD><TD>Locked</TD><TD>QAM256</TD><TD>29</TD><TD>597000000 Hz</TD><TD>9.1 dBmV</TD><TD>40.6 dB</TD><TD>60976095</TD><TD>8</TD><TD>25</TD></TR><TR><TD>19</TD><TD>Locked</TD><TD>QAM256</TD><TD>30</TD><TD>603000000 Hz</TD><TD>8.2 dBmV</TD><TD>40.4 dB</TD><TD>60979616</TD><TD>5</TD><TD>29</TD></TR><TR><TD>20</TD><TD>Locked</TD><TD>QAM256</TD><TD>31</TD><TD>609000000 Hz</TD><TD>7.7 dBmV</TD><TD>40.2 dB</TD><TD>60983303</TD><TD>8</TD><TD>26</TD></TR><TR><TD>21</TD><TD>Locked</TD><TD>QAM256</TD><TD>32</TD><TD>615000000 Hz</TD><TD>9.0 dBmV</TD><TD>40.3 dB</TD><TD>60986448</TD><TD>10</TD><TD>24</TD></TR><TR><TD>22</TD><TD>Locked</TD><TD>QAM256</TD><TD>2</TD><TD>417000000 Hz</TD><TD>8.4 dBmV</TD><TD>40.9 dB</TD><TD>50948097</TD><TD>33</TD><TD>0</TD></TR><TR><TD>23</TD><TD>Locked</TD><TD>QAM256</TD><TD>3</TD><TD>435000000 Hz</TD><TD>8.4 dBmV</TD><TD>40.9 dB</TD><TD>50962136</TD><TD>18</TD><TD>15</TD></TR><TR><TD>24</TD><TD>Locked</TD><TD>QAM256</TD><TD>4</TD><TD>441000000 Hz</TD><TD>8.3 dBmV</TD><TD>40.9 dB</TD><TD>50973413</TD><TD>26</TD><TD>4</TD></TR><TR><TD>25</TD><TD>Locked</TD><TD>QAM256</TD><TD>5</TD><TD>453000000 Hz</TD><TD>8.8 dBmV</TD><TD>41.2 dB</TD><TD>50983532</TD><TD>7</TD><TD>26</TD></TR><TR><TD>26</TD><TD>Locked</TD><TD>QAM256</TD><TD>6</TD><TD>459000000 Hz</TD><TD>8.5 dBmV</TD><TD>40.9 dB</TD><TD>50996652</TD><TD>14</TD><TD>19</TD></TR><TR><TD>27</TD><TD>Locked</TD><TD>QAM256</TD><TD>7</TD><TD>465000000 Hz</TD><TD>9.2 dBmV</TD><TD>41.0 dB</TD><TD>51011301</TD><TD>26</TD><TD>5</TD></TR><TR><TD>28</TD><TD>Locked</TD><TD>QAM256</TD><TD>8</TD><TD>471000000 Hz</TD><TD>9.2 dBmV</TD><TD>41.0 dB</TD><TD>51024527</TD><TD>26</TD><TD>7</TD></TR><TR><TD>29</TD><TD>Locked</TD><TD>QAM256</TD><TD>9</TD><TD>477000000 Hz</TD><TD>8.8 dBmV</TD><TD>41.1 dB</TD><TD>51033669</TD><TD>27</TD><TD>0</TD></TR><TR><TD>30</TD><TD>Locked</TD><TD>QAM256</TD><TD>10</TD><TD>483000000 Hz</TD><TD>9.2 dBmV</TD><TD>41.1 dB</TD><TD>51047600</TD><TD>31</TD><TD>2</TD></TR><TR><TD>31</TD><TD>Locked</TD><TD>QAM256</TD><TD>11</TD><TD>489000000 Hz</TD><TD>9.6 dBmV</TD><TD>41.1 dB</TD><TD>51053459</TD><TD>9</TD><TD>25</TD></TR><TR><TD>32</TD><TD>Locked</TD><TD>QAM256</TD><TD>12</TD><TD>495000000 Hz</TD><TD>8.9 dBmV</TD><TD>41.0 dB</TD><TD>51058490</TD><TD>27</TD><TD>4</TD></TR></TBODY></TABLE></DIV></TD></TR><TR><TD><HR /></TD></TR><TR><TD><STRONG><tabindex=-1>Upstream Bonded Channels</tabindex=-1></STRONG></TD></TR><TR><TD><DIV class="in-frame-table"><TABLE border="1" cellspacing="0" cellpadding="2"><TBODY><TR><TD><SPAN class="thead">Channel</SPAN></TD><TD><SPAN class="thead">Lock Status</SPAN></TD><TD><SPAN class="thead">Modulation</SPAN></TD><TD><SPAN class="thead">Channel ID</SPAN></TD><TD><SPAN class="thead">Frequency</SPAN></TD><TD><SPAN class="thead">Power</SPAN></TD></TR><TR><TD>1</TD><TD>Locked</TD><TD>ATDMA</TD><TD>5</TD><TD>36100000 Hz</TD><TD>41.0 dBmV</TD></TR><TR><TD>2</TD><TD>Locked</TD><TD>ATDMA</TD><TD>6</TD><TD>29600000 Hz</TD><TD>41.3 dBmV</TD></TR><TR><TD>3</TD><TD>Locked</TD><TD>ATDMA</TD><TD>7</TD><TD>23000000 Hz</TD><TD>40.5 dBmV</TD></TR><TR><TD>4</TD><TD>Locked</TD><TD>ATDMA</TD><TD>8</TD><TD>16500000 Hz</TD><TD>40.5 dBmV</TD></TR><TR><TD>5</TD><TD>Not Locked</TD><TD>Unknown</TD><TD>0</TD><TD>0 Hz</TD><TD>0.0 dBmV</TD></TR><TR><TD>6</TD><TD>Not Locked</TD><TD>Unknown</TD><TD>0</TD><TD>0 Hz</TD><TD>0.0 dBmV</TD></TR><TR><TD>7</TD><TD>Not Locked</TD><TD>Unknown</TD><TD>0</TD><TD>0 Hz</TD><TD>0.0 dBmV</TD></TR><TR><TD>8</TD><TD>Not Locked</TD><TD>Unknown</TD><TD>0</TD><TD>0 Hz</TD><TD>0.0 dBmV</TD></TR></TBODY></TABLE></DIV></TD></TR><TR><TD><HR /></TD></TR><TR><TD><STRONG><tabindex=-1>Downstream OFDM Channels</tabindex=-1></STRONG></TD></TR><TR><TD><DIV class="in-frame-table"><TABLE border="1" cellspacing="0" cellpadding="2"><TBODY><TR><TD><SPAN class="thead">Channel</SPAN></TD><TD><SPAN class="thead">Lock Status</SPAN></TD><TD><SPAN class="thead">Modulation / Profile ID</SPAN></TD><TD><SPAN class="thead">Channel ID</SPAN></TD><TD><SPAN class="thead">Frequency</SPAN></TD><TD><SPAN class="thead">Power</SPAN></TD><TD><SPAN class="thead">SNR / MER</SPAN></TD><TD><SPAN class="thead">Active Subcarrier Number Range</SPAN></TD><TD><SPAN class="thead">Unerrored Codewords</SPAN></TD><TD><SPAN class="thead">Correctable Codewords</SPAN></TD><TD><SPAN class="thead">Uncorrectable Codewords</SPAN></TD></TR><TR><TD>1</TD><TD>Locked</TD><TD>0</TD><TD>159</TD><TD>722000000 Hz</TD><TD>9.2 dBmV</TD><TD>39.5 dB</TD><TD>1246 ~ 2849</TD><TD>3214687535</TD><TD>23993</TD><TD>0</TD></TR><TR><TD>2</TD><TD>Not Locked</TD><TD>0</TD><TD>0</TD><TD>0 Hz</TD><TD>7.6 dBmV</TD><TD>0.0 dB</TD><TD>0 ~ 4095</TD><TD>0</TD><TD>0</TD><TD>0</TD></TR></TBODY></TABLE></DIV></TD></TR><TR><TD><HR /></TD></TR><TR><TD><STRONG><tabindex=-1>Upstream OFDMA Channels</tabindex=-1></STRONG></TD></TR><TR><TD><DIV class="in-frame-table"><TABLE border="1" cellspacing="0" cellpadding="2"><TBODY><TR><TD><SPAN class="thead">Channel</SPAN></TD><TD><SPAN class="thead">Lock Status</SPAN></TD><TD><SPAN class="thead">Modulation / Profile ID</SPAN></TD><TD><SPAN class="thead">Channel ID</SPAN></TD><TD><SPAN class="thead">Frequency</SPAN></TD><TD><SPAN class="thead">Power</SPAN></TD></TR><TR><TD>1</TD><TD>Not Locked</TD><TD>Unknown</TD><TD>0</TD><TD>0 Hz</TD><TD>0 dBmV</TD></TR><TR><TD>2</TD><TD>Not Locked</TD><TD>Unknown</TD><TD>0</TD><TD>0 Hz</TD><TD>0 dBmV</TD></TR></TBODY></TABLE></DIV></TD></TR></TBODY></TABLE>Tue, 17 Nov 2020 05:00:48 GMThttps://forums.xfinity.com/t5/Your-Home-Network/Paying-for-600Mbps-Getting-less-than-half-CM1000-modem/m-p/3386565#M337971banjo_viking2020-11-17T05:00:48ZRe: Paying for 600Mbps, Getting less than half. CM1000 modem + Nighthawk AC1900 router
https://forums.xfinity.com/t5/Your-Home-Network/Paying-for-600Mbps-Getting-less-than-half-CM1000-modem/m-p/3386590#M337973
<P>Have you tried connecting to the modem directly and conducted a speedtest? <BR /><BR />Did you check speeds here? <A href="https://speedtest.xfinity.com/" target="_blank">https://speedtest.xfinity.com/</A><BR /><BR />Also, look at the max possible wifi speeds for various devices <A href="https://speedtest.xfinity.com/devicespeeds" target="_blank">https://speedtest.xfinity.com/devicespeeds</A></P><P> </P>Tue, 17 Nov 2020 14:27:02 GMThttps://forums.xfinity.com/t5/Your-Home-Network/Paying-for-600Mbps-Getting-less-than-half-CM1000-modem/m-p/3386590#M337973Shankarhokie2020-11-17T14:27:02ZRe: Paying for 600Mbps, Getting less than half. CM1000 modem + Nighthawk AC1900 router
https://forums.xfinity.com/t5/Your-Home-Network/Paying-for-600Mbps-Getting-less-than-half-CM1000-modem/m-p/3386600#M337975
<P>Thanks for the reply.</P><P> </P><P>Yes, I've run several speedtests at different times of the day. When I'm plugged directly into the modem, I achieve speeds of 100Mbps or less. Same thing when I'm plugged into the router. When I use Wifi, I can get 150-280Mbps. </P>Tue, 17 Nov 2020 15:25:59 GMThttps://forums.xfinity.com/t5/Your-Home-Network/Paying-for-600Mbps-Getting-less-than-half-CM1000-modem/m-p/3386600#M337975banjo_viking2020-11-17T15:25:59ZRe: Paying for 600Mbps, Getting less than half. CM1000 modem + Nighthawk AC1900 router
https://forums.xfinity.com/t5/Your-Home-Network/Paying-for-600Mbps-Getting-less-than-half-CM1000-modem/m-p/3386618#M337977
<BLOCKQUOTE><HR /><LI-USER uid="6953442"></LI-USER> wrote: ... My log keeps throwing a dynamic range window violation code ...<HR /></BLOCKQUOTE><P>Please post the complete error log.</P><P> </P><P>You may be able to check the laptop's Ethernet adapter speed by checking its device characteristics. If it's running Windows, you can do that in Device Manager / Network adapters.</P><P> </P>Tue, 17 Nov 2020 17:00:01 GMThttps://forums.xfinity.com/t5/Your-Home-Network/Paying-for-600Mbps-Getting-less-than-half-CM1000-modem/m-p/3386618#M337977BruceW2020-11-17T17:00:01ZRe: Paying for 600Mbps, Getting less than half. CM1000 modem + Nighthawk AC1900 router
https://forums.xfinity.com/t5/Your-Home-Network/Paying-for-600Mbps-Getting-less-than-half-CM1000-modem/m-p/3386798#M338027
Thanks.<BR /><BR />I think I was able to solve my problem, but I don’t know if I solved it so much as I bypassed it.<BR /><BR />I had an extra modem and router that were the same models as the one’s I’ve been struggling with, so I decided to swap them out one by one to see if that made a difference. Changing modems made no difference, but switching out the router did make a small difference—nothing drastic though.<BR /><BR />I went to the store and bought a very inexpensive wifi-6 router, and suddenly my WiFi speeds are at full capacity! I’m clocking in now at 580 mbps when I stand next to the router. The hard line speeds are still coming in at 100 and lower, thought, and they did not change across the two modems and three routers. I’m starting to think it has something to do with my computer and not my boxes. I’ll have to try connecting in with a different laptop soon to see if that makes a difference.<BR /><BR />Thanks everyoneWed, 18 Nov 2020 06:50:17 GMThttps://forums.xfinity.com/t5/Your-Home-Network/Paying-for-600Mbps-Getting-less-than-half-CM1000-modem/m-p/3386798#M338027banjo_viking2020-11-18T06:50:17Z