HELP! Low Speeds on Gig1 HFC and high Post-RS Errors
Hello, I have GIG1 fibre HFC with the Hub 5 and I am not experiencing expected speeds both wired via Cat 6 and Wireless. Even on a Wi-Fi 6 Enabled device with a 1GB network adapter right next to the router I experience around 300MB - 350MB, and I occasionally do have dropouts on the network although none in the past day. This has got worse as compared to the 600MB I was previously receiving on the same device in the same location. I've taken a look at power levels and I believe these are fine based on Sephiroth's post (albeit this is outdated but I believe still true), however I am experiencing high Post-RS errors especially on Downstream channels 2 through 8 (where power levels are higher than the others), and channels 21 and 22. I am also seeing some MDD message timeouts. I was hoping someone could help me interpret the raw data to help me provide VM with a description of the issue so I can get this resolved via an Engineer if required sooner rather than later. Please see below information. Thanks in advance! NETWORK LOGS: Time Priority Description 08-08-2025 23:22:40 notice GUI Login Status - Login Success from LAN interface 08-08-2025 22:44:30 notice CM-STATUS message sent. Event Type Code: 5; Chan ID: 2 3 4 5 6 9 10 11 12 13 14 15 16 17 18 19 20 21 23 24 26 27 28 29 30 31; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=30:;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1; 08-08-2025 22:40:23 error DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=306;CMTS-MAC=00:CM-QOS=1.1;CM-VER=3.1; 08-08-2025 22:31:37 notice CM-STATUS message sent. Event Type Code: 4; Chan ID: 2 3 4 5 6 7 18 19 20 21 24 26 27 28 29 30 31; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MACCMTS-MAC=0:5f;CM-QOS=1.1;CM-VER=3.1; 08-08-2025 22:31:27 notice CM-STATUS message sent. Event Type Code: 5; Chan ID: 2 3 4 5 6 9 10 11 12 13 14 15 16 17 18 19 20 21 23 24 26 27 28 29 30 31; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=346;CMTS-MAC=005f;CM-QOS=1.1;CM-VER=3.1; 08-08-2025 22:31:11 warning MDD message timeout;CM-MAC=30:67:a1:8f:28:46;CMTS-MAC=00:0;CM-QOS=1.1;CM-VER=3.1; 08-08-2025 22:31:06 notice CM-STATUS message sent. Event Type Code: 2; Chan ID: 2 5; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=30;CMTS-MAC=00:0;CM-QOS=1.1;CM-VER=3.1; 08-08-2025 22:28:12 notice CM-STATUS message sent. Event Type Code: 4; Chan ID: 2 3 4 5 6 7 18 20 21 24 26 27 28 29 30 31; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=306;CMTS-MAC=f;CM-QOS=1.1;CM-VER=3.1; 08-08-2025 22:27:56 notice CM-STATUS message sent. Event Type Code: 5; Chan ID: 2 3 4 5 6 18 20 21 24 26 27 28 29 30 31; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=30:6;CMTS-MAC=0a:5f;CM-QOS=1.1;CM-VER=3.1; 08-08-2025 22:27:54 notice CM-STATUS message sent. Event Type Code: 5; Chan ID: 3 4 18 20 21 24 26 27 28 29 30 31; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=30;CMTS-MAC=00:05f;CM-QOS=1.1;CM-VER=3.1; 08-08-2025 22:27:52 notice CM-STATUS message sent. Event Type Code: 1; Chan ID: 2 3 4 5 6 7; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=30:6;CMTS-MAC=00f;CM-QOS=1.1;CM-VER=3.1; 08-08-2025 22:27:49 warning MDD message timeout;CM-MAC=30:67:a1:8f:28:46;CMTS-MAC=0f;CM-QOS=1.1;CM-VER=3.1; 08-08-2025 22:27:49 notice CM-STATUS message sent. Event Type Code: 2; Chan ID: 2 5 6; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=306;CMTS-MAC=00f;CM-QOS=1.1;CM-VER=3.1; 08-08-2025 22:27:42 notice CM-STATUS message sent. Event Type Code: 5; Chan ID: 2 3 4 5 6 18 20 21 24 26 27 28 29 30 31; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=3;CMTS-MAC=05f;CM-QOS=1.1;CM-VER=3.1; 08-08-2025 22:27:40 notice CM-STATUS message sent. Event Type Code: 2; Chan ID: 2 3; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=30CMTS-MAC=005f;CM-QOS=1.1;CM-VER=3.1; 08-08-2025 22:23:43 notice GUI Login Status - Login Success from LAN interface 08-08-2025 22:22:56 notice GUI Login Status - Login Fail from LAN interface 08-08-2025 22:22:28 notice GUI Login Status - Login Fail from LAN interface 08-08-2025 22:21:35 notice GUI Login Status - Login Fail from LAN interface 08-08-2025 22:21:30 notice GUI Login Status - Login Fail from LAN interface 08-08-2025 22:08:01 notice US profile assignment change. US Chan ID: 6; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=30:;CMTS-MAC=5f;CM-QOS=1.1;CM-VER=3.1; 08-08-2025 21:04:12 notice US profile assignment change. US Chan ID: 6; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=30:67CMTS-MAC=05f;CM-QOS=1.1;CM-VER=3.1; 08-08-2025 20:19:22 notice CM-STATUS message sent. Event Type Code: 5; Chan ID: 2 3 4 5 6 18 20 21 24 26 27 28 29 30 31; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=306;CMTS-MAC=0:5f;CM-QOS=1.1;CM-VER=3.1; 08-08-2025 20:19:20 notice CM-STATUS message sent. Event Type Code: 2; Chan ID: 5; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=30:6;CMTS-MAC=0f;CM-QOS=1.1;CM-VER=3.1; 08-08-2025 19:27:18 notice CM-STATUS message sent. Event Type Code: 5; Chan ID: 2 3 4 5 6 18 20 21 24 26 27 28 29 30 31; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=306;CMTS-MAC=0a:5f;CM-QOS=1.1;CM-VER=3.1; 08-08-2025 19:27:14 notice CM-STATUS message sent. Event Type Code: 2; Chan ID: 6; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=3;CMTS-MAC=05f;CM-QOS=1.1;CM-VER=3.1; 08-08-2025 19:21:51 notice CM-STATUS message sent. Event Type Code: 4; Chan ID: 2 3 5 6 7 18 20 21 24 26 27 28 29 30 31; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=36;CMTS-MAC=5f;CM-QOS=1.1;CM-VER=3.1; 08-08-2025 19:21:46 notice CM-STATUS message sent. Event Type Code: 5; Chan ID: 2 3 4 5 6 18 20 21 24 26 27 28 29 30 31; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=3;CMTS-MAC=0f;CM-QOS=1.1;CM-VER=3.1; 08-08-2025 19:21:41 notice CM-STATUS message sent. Event Type Code: 2; Chan ID: 2 3 5 6; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=306;CMTS-MAC=0:5f;CM-QOS=1.1;CM-VER=3.1; 08-08-2025 19:21:38 warning MDD message timeout;CM-MAC=6;CMTS-MAC=0f;CM-QOS=1.1;CM-VER=3.1; 08-08-2025 18:56:35 notice US profile assignment change. US Chan ID: 6; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=36;CMTS-MAC=5f;CM-QOS=1.1;CM-VER=3.1; 08-08-2025 17:52:47 notice US profile assignment change. US Chan ID: 6; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=36;CMTS-MAC=f;CM-QOS=1.1;CM-VER=3.1; 08-08-2025 14:41:21 notice US profile assignment change. US Chan ID: 6; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=30;CMTS-MAC=0f;CM-QOS=1.1;CM-VER=3.1; 08-08-2025 12:28:31 notice CM-STATUS message sent. Event Type Code: 5; Chan ID: 2 3 4 5 6 18 20 21 24 26 27 28 29 30 31; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=36;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1; 08-08-2025 11:29:54 notice US profile assignment change. US Chan ID: 6; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=346;CMTS-MAC=:5f;CM-QOS=1.1;CM-VER=3.1; 08-08-2025 10:26:06 notice US profile assignment change. US Chan ID: 6; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=306;CMTS-MAC=:5f;CM-QOS=1.1;CM-VER=3.1; 08-08-2025 09:52:45 notice US profile assignment change. US Chan ID: 6; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=36;CMTS-MAC=00f;CM-QOS=1.1;CM-VER=3.1; 08-08-2025 09:47:42 notice US profile assignment change. US Chan ID: 6; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=;CMTS-MAC=5f;CM-QOS=1.1;CM-VER=3.1; STATUS: CONFIGURATION: UPSTREAM: DOWNSTREAM: [Mod - MACs removed for security]Intermittent Signal
I pay for 500mbps download speed and 50mbps upload. I use an ethernet cable from the modem/router to my pc. I've been having issue with the upload speeds not being what they should be at RANDOM times throughout the day. But what is is going on here? Originally, I thought the speed drops past 8pm randomly but no it was throughout whole afternoon one day. Every speed testing I've done has always been different. I just tested again.. It's not 50mbps upload but it's not unsuable??? So why do I lag so much and have ridiculously high ping in games and calls. Ping spikes to 500-1000ms back down and up and it's stable throughout random times in the day. It's not just one game its all games. Testing on my phone and the uploads are the same download speed is less but I use my PC more. This is a screenshot I took one night 15/05/2025 What I've tried: I had an engineer come say he didn't see anything unusual because he didn't see any logs where my upload speed drops... Said he couldn't do anything, gave me his phone number said he would contact me back to see if it was on virgin media's side but hasn't contacted me since and its been 6 days and I even tried contacting him on the number he gave and no response. Called virgin after and they suggested I do factory reset. It was 50mbps upload after the factory for a bit then it just went back down.. So that didn't do anything. They told me if that didn't work they would send me a new router. Live chatted with someone told them everything and they just sent another engineer.. Told them about me realising that there are T3 Timeouts on Channel 5 (if that had anything to do with it) The 19 timeouts racked to 25 the day after this screenshot where the engineer had visited. Engineer told me they cleaned the cables . Told me it's rare but it might be feedback coming back into the router from my ethernet cable. Just checked again and my channel 5 T3 Timeouts is now 1 after they visited. I was getting 50mbps for a bit after the engineer left its down again.. Internet sometimes feels slow when I'm just browsing and loading links. I don't understand it all too well.. But all I know is that my ping is ridiculously high and low in games and when I have 50mbps upload that is never an issue and it is more stable. It's not just ping it's calls, streaming my screen to friends in call too. It NEVER used to be like this!! It's been happening for nearly a month. My upload speed can say 0 mbps but I can still upload a file. I see it going 0 to 3 to 4 to 9 . It's all over the place. I'm really lost. I didn't end up recieving a new router but that is my last hope. Another thing I was worried about if it was my computer itself, because nobody in my house uses the internet as much as I do and on mobiles it's not that noticeable unless you tried to play a game on mobile. Uploading files is slow but bearable. I've tested my ping on my computer with cmd, everything looks fine. My applications arent even using a lot of upload speed they don't even require that much. I even purchased a new ethernet cable but that didn't change anything. I also decided to test for bufferfloat. Thinking of buying a router now but im worried that will not solve my issues. I'm really confused and need help.
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