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CAX 30 and XFinity Upload Speed
i have a cax 30 and my xfinity service is 1gb download, 100mb upload.
i get somewhere between 500 and 800mb download (which i guess is okay) BUT my upload speed is stuck around 25mb (which is not okay).
i am having an xfinity tech person come to my place but anyone else had success solving this?
one note--i tried to update the firmware from 1.4x to 2.2x and the app says i have the latest (1.4x) firmware now.
jim-hanson wrote:okay so . . .
1. i can't get nextgen service at this time regardless of my modem.
2. even if i did have nextgen service, my cax30 is not yet capable of that (even though it is a recommended device)
correct?
Your specific service address has not yet been updated to receive the Xfinity Next Gen service. Work in progress across the Xfinity service areas.
Your CAX30 does not have the updated firmware necessary to allow it to connect to the Xfinity Next Gen network. The list of devices approved for Next Gen network connection is updated by Xfinity every month or so.
Yes, correct.
23 Replies
Are you testing speed with a wired PC?
Please post a copy and paste of the modems connection status and event log page.
https://kb.netgear.com/30007/How-do-I-obtain-the-cable-connection-information-from-a-NETGEAR-cable-modem-modem-router
https://kb.netgear.com/30008/How-do-I-view-or-clear-the-event-logs-on-my-NETGEAR-cable-modem-or-modem-routerHas a factory reset and setup from scratch been performed since last FW update?
was testing with wireless.
just did a wired test. 332 download, 23 upload
answer to other questions in a moment
i had done no firmware update but i did one going to 2.2+. i see no speed difference after that.
EVENT LOG
Event Log
Clear Log Refresh
Time
Priority
Description
2024-01-10 21:27:50
Critical (3)
UCD invalid or channel unusable;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:90:f0:29:07:00;CM-QOS=1.1;CM-VER=3.1;
2024-01-10 21:27:50
Notice (6)
DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:90:f0:29:07:00;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:32
Notice (6)
Honoring MDD; IP provisioning mode = IPv6
1970-01-01 00:00:25
Critical (3)
UCD invalid or channel unusable;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:90:f0:29:07:00;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:25
Critical (3)
SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2024-01-08 15:22:55
Critical (3)
UCD invalid or channel unusable;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:90:f0:29:07:00;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:26
Critical (3)
UCD invalid or channel unusable;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:90:f0:29:07:00;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:25
Critical (3)
SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2024-01-08 13:44:09
Critical (3)
UCD invalid or channel unusable;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:90:f0:29:07:00;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:30
Critical (3)
UCD invalid or channel unusable;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:90:f0:29:07:00;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:29
Critical (3)
SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2024-01-08 13:42:27
Critical (3)
Resetting the cable modem due to docsDevResetNow
2024-01-08 13:40:41
Critical (3)
UCD invalid or channel unusable;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:90:f0:29:07:00;CM-QOS=1.1;CM-VER=3.1;
2024-01-08 13:40:41
Critical (3)
SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:90:f0:29:07:00;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:27
Critical (3)
UCD invalid or channel unusable;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:90:f0:29:07:00;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:26
Critical (3)
SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2024-01-08 13:07:32
Critical (3)
UCD invalid or channel unusable;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:90:f0:29:07:00;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:31
Critical (3)
UCD invalid or channel unusable;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:90:f0:29:07:00;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:29
Critical (3)
SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2024-01-08 13:05:50
Critical (3)
Resetting the cable modem due to docsDevResetNow
2024-01-08 13:00:48
Critical (3)
UCD invalid or channel unusable;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:90:f0:29:07:00;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:25
Critical (3)
UCD invalid or channel unusable;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:90:f0:29:07:00;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:24
Critical (3)
SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2024-01-05 10:16:09
Critical (3)
UCD invalid or channel unusable;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:90:f0:29:07:00;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:31
Critical (3)
UCD invalid or channel unusable;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:90:f0:29:07:00;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:29
Critical (3)
SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2024-01-04 23:19:54
Critical (3)
UCD invalid or channel unusable;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:90:f0:29:07:00;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:30
Critical (3)
UCD invalid or channel unusable;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:90:f0:29:07:00;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:29
Critical (3)
SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2024-01-04 23:18:10
Critical (3)
Resetting the cable modem due to docsDevResetNow
2024-01-03 16:41:20
Critical (3)
Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:90:f0:29:07:00;CM-QOS=1.1;CM-VER=3.1;
2024-01-03 13:27:42
Critical (3)
UCD invalid or channel unusable;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:90:f0:29:07:00;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:26
Critical (3)
UCD invalid or channel unusable;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:90:f0:29:07:00;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:25
Critical (3)
SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2024-01-03 13:26:04
Critical (3)
Resetting the cable modem due to docsDevResetNow
2024-01-03 01:27:28
Critical (3)
Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:90:f0:29:07:00;CM-QOS=1.1;CM-VER=3.1;
2024-01-03 00:39:06
Critical (3)
Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:90:f0:29:07:00;CM-QOS=1.1;CM-VER=3.1;
2024-01-03 00:38:16
Critical (3)
UCD invalid or channel unusable;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:90:f0:29:07:00;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:30
Critical (3)
UCD invalid or channel unusable;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:90:f0:29:07:00;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:29
Critical (3)
SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=e0:46:ee:7e:a3:7b;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
jim-hanson wrote:i have a cax 30 and my xfinity service is 1gb download, 100mb upload.
i get somewhere between 500 and 800mb download (which i guess is okay) BUT my upload speed is stuck around 25mb (which is not okay).
i am having an xfinity tech person come to my place but anyone else had success solving this?
one note--i tried to update the firmware from 1.4x to 2.2x and the app says i have the latest (1.4x) firmware now.
At this time you are not going to get 1000/100 Mbps throughput values with your CAX30 on Xfinity. The CAX30 is not yet on the Xfinity approved COAM hardware list. At this time, that list is relatively short. For details, see here:
https://www.reddit.com/r/Comcast_Xfinity/wiki/knowledgebase/next-generation-internet/
this xfinity document says it is recommended for the xifi/fast speeds.
jim-hanson wrote:this xfinity document says it is recommended for the xifi/fast speeds.
XiFi/fast is not the same as Next Gen. The 1000/100 Mbps throughput tier is part of Next Gen. See attached.
One more time, go here https://www.reddit.com/r/Comcast_Xfinity/wiki/knowledgebase/next-generation-internet/, scroll down to the section on eligibility. The CAX30 is not on the list.
A review of your cable connection status table shows you are not in a Next Gen service address. You have no OFDMA upload channels.
