Degraded DL speeds following service outage.

whyhallothar · Post by **whyhallothar** » Fri Mar 13, 2015 1:03 pm

I recently had my internet go down for a brief period (30-45mins), since service has been reinstated my DL speeds have been significantly reduced. I have noticed little to no change in my ping to various areas and my upload has remained consistently high.

Prior to the outage an average speedtest would give me ~60-70Mbps down and ~12-15Mbps up. Following the outage the results are:

After discussing the decrease with BT they informed me that they see no issues with the line and that I was having an issue with my Home Hub 5 (router / modem), they agreed to send a new one out to be. However, as this would take a week+ to arrive I purchased an Asus DSL-n66u (VDSL modem/router) and installed this in place of my Home Hub. The results were identical. I have followed up with BT and they are currently investigating, but as I have little to no faith in them efficiently solving the issue I've decided to bring it to you clever folk with the hope that you can help!

As I see you guys usually ask for a tracert - here are the results of my tracert to yahoo.com.

Tracing route to yahoo.com [98.138.253.109]
over a maximum of 30 hops:

1 1 ms <1 ms <1 ms BThomehub.home [192.168.1.254]
2 6 ms 5 ms 5 ms 217.32.142.96
3 * 5 ms 5 ms 217.32.142.126
4 12 ms 12 ms 12 ms 213.120.158.226
5 12 ms 12 ms 12 ms 31.55.165.57
6 12 ms 12 ms 12 ms 31.55.165.107
7 11 ms 11 ms 11 ms acc1-10GigE-10-2-0.mr.21cn-ipp.bt.net [109.159.250.74]
8 25 ms * 22 ms core2-te0-4-0-0.ilford.ukcore.bt.net [109.159.250.3]
9 20 ms 20 ms 19 ms 109.159.255.97
10 18 ms * 18 ms ae2.pat1.loz.yahoo.com [195.66.224.115]
11 119 ms 104 ms 102 ms ae7.pat1.nyc.yahoo.com [66.196.65.13]
12 102 ms 102 ms 137 ms ae7.pat1.dce.yahoo.com [216.115.104.120]
13 * 146 ms * ae-6.pat1.che.yahoo.com [216.115.96.81]
14 144 ms 144 ms 143 ms ae-5.pat1.nez.yahoo.com [216.115.96.76]
15 143 ms * 143 ms ae-0.msr1.ne1.yahoo.com [216.115.100.1]
16 143 ms * * ae-3.clr1-a-gdc.ne1.yahoo.com [98.138.97.1
17 137 ms 139 ms 136 ms UNKNOWN-98-138-97-X.yahoo.com [98.138.97.3
18 145 ms * 144 ms po-16.bas1-7-prd.ne1.yahoo.com [98.138.240
19 * 142 ms 142 ms ir1.fp.vip.ne1.yahoo.com [98.138.253.109]

Relevant details: Brand new PC regularly scanned with CCCleaner and Windows Defender running Windows 8 OS. Wired connection direct to Home Hub with no other devices currently connected, however the same degraded speeds are showing on a wired Windows 7 laptop, an iPad, and an iPhone when I test it with them.

Let me know if you guys need any more information and I will gladly provide it. And thanks in advance for any help that may come my way!

Edit: When I access my router it is showing 76.51Mbps Downstream and 19.53Mbps Upstream - Is this just the maximum allowable speed or why am I seeing such drastically different downstream results at my computer?

Post by **Philip** » Mon Apr 13, 2015 11:43 pm

Hm, is there another client computer at your location that tests with about the same speeds (or is it just that one client) ? Is your client PC connected via wired Ethernet, or wirelessly ?

You can try to include your DSL signal levels, attenuation, SNR margin, etc. if the router/modem has a stats page. If the modem links at higher speeds though, it may be cabling issues after the modem. I'd try to keep the modem ~half a meter away from possible sources of EMI, like fluorescent lights, power supplies, etc.

SamirD · Post by **SamirD** » Tue Apr 14, 2015 8:18 pm

I've seen some weird stuff like this when the speed/duplex on my wired ethernet wasn't set right. See if you can manually set it on both sides and if things improve.

brisbanelawyers · Post by **brisbanelawyers** » Thu Jul 02, 2015 8:39 am

Superb discussion and amazing topic. Thanks for sharing.