VDSL Performance & Tuning

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'That VDSL Cat'
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#824176 23-May-2013 15:35

SamF: So have you got around the SID issue?

Wow, DLM-1 at 11 CRCPM! Impressive! I wonder if it will keep you there?

obtaining the sid is a simple process of logging in basically.. from that point, theres 10 mins free roam to obtain any stats required..

im interested to see if it will keep too.. if it does, time to start snr tweaking!

still think there should be a 1ms, or even a 4ms profile between 1 and 8.. maybe they can shuffle the stages a tad, throw out those horrid 16 ms profiles! dealtful that would actually happen sadly..

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sidefx

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#824238 23-May-2013 17:35

Hmmm, I'm thinking it may be time to reduce my SNR Tweak a bit....

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SamF

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#824240 23-May-2013 17:40

@hio77: Oh, that's disappointing, we can't automate it using that method then...

@sidefx: Hmm, yeah looking a bit high! Although it has dropped off quite a bit since 1pm...

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#824242 23-May-2013 17:45

Posting from snap vdsl2 :D

Connected at 34mbit/10mbit with 12db attenuation which is about what we all expected

The problem is with the modem bridged to my router I can't access the modem's gui now :|

hio77

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#824246 23-May-2013 17:53

SamF: @hio77: Oh, that's disappointing, we can't automate it using that method then...

oh no no, its automated i was explaining the logic process involved in getting the sid.

essentially, there are 4 functions involved currently.
GetChallenge retrieves http://fritz.box/cgi-bin/webcm?getpage=../html/login_sid.xml from here, the xml node Challenge is stored.

after that, a response is generated (essentially the hashed password), this is the process of building the following string, challenge + "-" + password. after that, it is MD5 hashed.

last of all, the password is posted to http://fritz.box/cgi-bin/webcm in the format of login:command/response=challenge-response&getpage=../html/login_sid.xml" at this point, the same login_sid.xml is returned as the first stage, except with a sid completed.

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hio77

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#824273 23-May-2013 18:00

JamesL: Posting from snap vdsl2 :D

Connected at 34mbit/10mbit with 12db attenuation which is about what we all expected

The problem is with the modem bridged to my router I can't access the modem's gui now :|

looks good, might be able to tweak a access rule on the modem possibly, otherwise your gonna have to directly connect to check your error rates.. odd that you have gone straight to DLM-1

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#824275 23-May-2013 18:05

Looks like my line is similar to sidefx's albeit he's done a lot of SNRM tweaking to get an extra 10mbit

I know a guy at my old work who was bridging his Zyxel and still accessed the gui so I'll ask him how he did it. Maybe I need to have the Zyxel on the same subnet instead of making it 192.168.2.1

I think eXDee went straight to DLM-1 as well.. it must be a new thing

Also, does anyone know if getting a static ip through snap changes which pop you get serviced from? I assume Snap have a pop in Wellington so just want to make sure

hio77

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#824278 23-May-2013 18:10

JamesL: Looks like my line is similar to sidefx's albeit he's done a lot of SNRM tweaking to get an extra 10mbit

I know a guy at my old work who was bridging his Zyxel and still accessed the gui so I'll ask him how he did it. Maybe I need to have the Zyxel on the same subnet instead of making it 192.168.2.1

I think eXDee went straight to DLM-1 as well.. it must be a new thing

Also, does anyone know if getting a static ip through snap changes which pop you get serviced from? I assume Snap have a pop in Wellington so just want to make sure

not sure if your modem tells you, but the fritz logs which pop you connect to.. snap have quite a few pops around.. so chances are your good..

ah, just looked back exdee was after me, still odd starting at DLM-1

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SamF

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#824303 23-May-2013 18:39

hio77:
SamF: @hio77: Oh, that's disappointing, we can't automate it using that method then...

oh no no, its automated i was explaining the logic process involved in getting the sid.

essentially, there are 4 functions involved currently.
GetChallenge retrieves http://fritz.box/cgi-bin/webcm?getpage=../html/login_sid.xml from here, the xml node Challenge is stored.

after that, a response is generated (essentially the hashed password), this is the process of building the following string, challenge + "-" + password. after that, it is MD5 hashed.

last of all, the password is posted to http://fritz.box/cgi-bin/webcm in the format of login:command/response=challenge-response&getpage=../html/login_sid.xml" at this point, the same login_sid.xml is returned as the first stage, except with a sid completed.

eXDee

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#824325 23-May-2013 19:08

I started on DLM-1 and lost it after a week and a half or so.

For that tool being mentioned, it would be nice to have it publicly available. I'd even go as far as running a background service to keep a log of it, and if desired forward such data to a serve to collect and compare it in a crowdsourced manner.

stevehodge:
eXDee: Error rate is still low.

But the graph doesn't match up. Every time i've looked the count on the page above is decimals and single digits.
Shouldn't be seeing 500 per hour on the graph?

Yes there is something very strange going on. You've had only 54 seconds with errors since your last sync at 5pm yesterday so the 0.07 CRC/min looks about right, but it doesn't correspond to the statistics tab at all. Your FEC errors do seem high but we don't think that has any bearing on DLM and we've seen some odd (and much higher) numbers in the past.

You're on INP 1.0 which is interesting as in the past it seems that hasn't been correctly reported by the Fritz. What firmware are you on (System->Firmware Update will tell you)? Latency of 8ms and INP 1.0 means you're on DLM-4 and I do think it's not great to have any errors at all on DLM-4.

That's a good point. It does look like DLM-4. Hmmm...

My firmware is the latest. FRITZ!OS 05.51
Firmware version: 84.05.51

I have no idea what's going on in the graphs. Its only up to 90 ES now.

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#824339 23-May-2013 19:25

Ok, had to create an interface group on the Zyxel and assign one of the eth ports to be on the LAN

I was reading the wrong line for my attentuation, can someone tell me what it actually is? There's multiple db figures

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hio77

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#824342 23-May-2013 19:28

eXDee: I started on DLM-1 and lost it after a week and a half or so.

For that tool being mentioned, it would be nice to have it publicly available. I'd even go as far as running a background service to keep a log of it, and if desired forward such data to a serve to collect and compare it in a crowdsourced manner.

I have no idea what's going on in the graphs. Its only up to 90 ES now.

tool is being build with all means of being released, as a CLI tool for starters (along with a windowless version for task scheduling/service - if a straight console application is used for this, it takes the focus and is a pain..)

plan is to allow exporting to say, cvs, but along with that, dump it into a database and then it can be played with, find patterns, compare etc

interesting thing worth noting about the rounding of error rates, it always rounds down.

currently on 10.99 CRCPM, in the ui, that comes to 10

@sam, your message seems to have missed the content ;)

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hio77

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#824348 23-May-2013 19:34

JamesL: Ok, had to create an interface group on the Zyxel and assign one of the eth ports to be on the LAN

I was reading the wrong line for my attentuation, can someone tell me what it actually is? There's multiple db figures

error rates dont look bad at all, odd that you have zero ms delay according to your modem.. on the firtz, dlm-1 is 1ms delay each way.

total attenuation doesn't look right...

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#824350 23-May-2013 19:38

Ok, so I'm guessing its being misreported then

sidefx

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#824352 23-May-2013 19:40

@JamesL: How far did you think you were from the cabinet?

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