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Mister_E

join:2004-04-02
Etobicoke, ON
Reviews:
·Bell Sympatico
reply to jpc82

Re: [Internet] Corrupt Downloads

I've been experiencing the exact same problem over the past 2 weeks and have been trying to get it sorted in the Bell Direct Forum but without success as of yet. At least now I know for certain it's just not me!

I'm seeing corrupt downloads on large files (as well as slow download speeds) across three different PCs (1 Win7, 2 Win XP) as well as on 2 Android Smartphones. Along with the corrupt downloads, I'm seeing slow(er) download speeds...

At first I thought it may have been a MS update that was causing the issue, but after testing with the smartphones and seeing the same result, that ruled that out.

Further to that, I proceeded to download the same file using the cellular network and all was good - including a download using the phone tethered to one of the PCs above.

I then swapped out the 2Wire modem with an older Speedtouch modem I have - same issue - that ruled out the modem. I replaced the phone line, disconnected all other phones and filters - always the same issue.

Leads me to believe there's a problem with the Bell Network itself.

No solution forthcoming as of yet...

Also, note the following review: »Review of Bell Sympatico by KC1215 and just seeing the topics of messages in the Bell Direct forum makes me think something is up...

jpc82

join:2011-02-13
Woodbridge, ON
I am actually glad you replied. I saw your post in the direct support but couldn't see the details since the posts are private. My mother in law is also in Etobicoke.

Mister_E

join:2004-04-02
Etobicoke, ON
Reviews:
·Bell Sympatico

1 edit
Just completed the Line Quality test and all appears good..

»/pingtest/nil?···l.ca&p=1

My only thoughts are that the issue only presents itself with larger size file downloads - smaller files seem to come through okay for the most part.

Eg. on the smartphones, some ~20MB downloads will intermittently fail and succeed. However, on a file approaching ~100MB, the corruption is consistent and each attempted download yields a different corrupted files (meaning MD5 checksum is never the same on the same file!)

Mister_E

join:2004-04-02
Etobicoke, ON
Reviews:
·Bell Sympatico
reply to jpc82
said by jpc82:

I am actually glad you replied. I saw your post in the direct support but couldn't see the details since the posts are private. My mother in law is also in Etobicoke.

Glad to - hopefully now Bell will actually deal with the issue..

This can cause serious issues for the reliability of the systems - I had one program update itself but not verify the download as it installed it (I believe it simply updated by replacing files directly - not in a zip) and soon found the program corrupt and no longer working...


Paolo
Mr. Wireless

join:2004-05-29
canada
what command/program are u using to do the 1 minute mtr?

jpc82

join:2011-02-13
Woodbridge, ON
reply to Mister_E
She is supposed to get a call from someone today, but so far they haven't been able to figure anything out.

Yes, the problem is worse on large files, but I assume it is just a statistical thing. If 1 in 100,000,000 bits is wrong then you will see that in a larger file more often. Since the smaller file may just get lucky and not get a bad bit, but it still could.

Yes, I have told her not to update anything since that is also my worry. At least Microsoft and Apple are smart enough to sign and verify their files so it gets caught, but if they didn't and the 10.8.2 update happened she could have had a broken OS.

jpc82

join:2011-02-13
Woodbridge, ON
reply to Paolo
Not sure what you mean. I just sent her to the link and then got her to click the "Test Anyway" button after it told her she was not pingable.

Mister_E

join:2004-04-02
Etobicoke, ON
Reviews:
·Bell Sympatico
reply to jpc82
said by jpc82:

Yes, the problem is worse on large files, but I assume it is just a statistical thing. If 1 in 100,000,000 bits is wrong then you will see that in a larger file more often. Since the smaller file may just get lucky and not get a bad bit, but it still could.

My thoughts exactly.

Whereabouts in Etobicoke - I'm in a Condo near 427 & Rathburn.

Could be an issue with the Remote or wiring or perhaps in the CO itself if we're using the same one...

jpc82

join:2011-02-13
Woodbridge, ON
said by Mister_E:

My thoughts exactly.

Whereabouts in Etobicoke - I'm in a Condo near 427 & Rathburn.

Could be an issue with the Remote or wiring or perhaps in the CO itself if we're using the same one...

She is located close to there on Odessa.


gabriel kell

@bell.ca
reply to Mister_E
the problem is that your nic and your wilress adapter uses a mtu of 1500.... the modem is 1492, so you nic will send 1500 to the modem and the modem will drop 3% of packets.... so on that note change your mtu on your nic and wireless

netsh interface ipv4 set subinterface "Wireless Network Connection" mtu=1492 store=persistent

and wired

netsh interface ipv4 set subinterface "network interface name" mtu=1492 store=persistent

Mister_E

join:2004-04-02
Etobicoke, ON
Reviews:
·Bell Sympatico
Sorry.

I'm already aware of the 1492 vs. 1500 MTU. In any case, that shouldn't cause corruption - only split/fragmented packets (which can be problematic for secure connnections).

Furthermore, the issue only appeared ~3-1/2 weeks ago. All was fine before and I've hadn't made any changes to my MTU settings.

If you had read the entire thread, you would have read that it appears that Bell fixed the problem at THEIR end.
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