Kitz Forum
Broadband Related => FTTC and FTTP Issues => Topic started by: Bestgear on September 13, 2018, 05:19:02 PM
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Guys
I am paranoid in terms of rebooting my HG612's - what is considered best advice in terms of how you should approach this?
Should I wait for a specific time window during the day?
Should I switch the modem off and wait "X" minutes before I power up again?
Any guidance to avoid upsetting DLM would be very much appreciated.
David
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Why do you need to?
Is the first question...
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You get 20 odd reboots a day without DLM going crazy. Just pick a time that suits you/when the SNRM is optimal.
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A very simple rule of "paw" would be to power down the modem, for more than 15 minutes, somewhere between 1130 - 1200 hours. (If very paranoid, make it a 30 minutes down time.)
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Wow, as many as 20?
Would explain how I got away with mucking about with my dad's line a few weeks back - he had some major issues with noise on the line - was simply due to a poorly fitted faceplate
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10 or 20 depending on the ISP's chosen DLM profile.
That's assuming full 24 hours uptime which it won't be as it takes time to resync so probably 9 or 19 allowed per 24 hours.
Being scared to reboot the modem once in 3 month period is crazy as you could do it once a day and not bring it to DLM's attention.
Why do you need to?
Is the first question...
Memory usage increases over time.
Actual SNRM decreases over time (quite a bit on some modems).
I reboot my modem about once a month. It's the only resync my line has over the month so I don't bother waiting 30 mins as DLM isn't gong to care about a single resync.
As B*cat pointed out if you want to make sure DLM doesn't even count a resync then leave a full 30 mins between dropping sync and establishing sync again.
DLM works with 15 minute bins and if it sees 0 uptime for the 15 minute bin after the resync it will assume it was an unforced event and discount it.
https://kitz.co.uk/adsl/DLM.htm#MTBR
As you have 2 lines you could power 1 off for 30 mins. Reconnect it as you power off the 2nd. Bring that back up 30 minutes later. Then you have no downtime. That's if you're super paranoid about DLM that is :)
Personally I would just reboot them quickly.
If you want to get the highest possible sync then reboot them when the SNRM is at its highest. Some lines SNRM can vary by 1dB+ between morning and night and the attainable goes up and down with this.
Do your lines cause each other crosstalk? If so do you have an order in which you sync them?
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If you wish to be extremely careful, leaving it off for 30 minutes is the safest. But this is often not necessary in my experience. If memory serves, Kitz said that the ideal is to leave it off for the whole of the 15 minute period that is the next multiple of 15 minutes starting on the hour. So for example if you switch off at xx:14 you need to stay off until xx:30 throughout xx:15 - xx:30, and if you switch off at xx:16 then you need to stay off until xx:45 so as to be off throughout xx:30 - xx:45.
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j0hn, excellent answer.
I will admit I have been paranoid with reboots over the years, and often had 6-8 months uptime and never touched them!
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Why do you need to?
Is the first question...
DSLstats is struggling to login - as the delay is too long - thus I really need to reboot the device.
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Thanks Guys for all the replies.
I will switch it off for 40mins to be safe!
I cant see anywhere to thank the contributions on you replies... so sorry for not saying "thanks".
David