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Mike Wolf

join:2009-05-24
Beachwood, NJ
kudos:5

1 recommendation

reply to travelguy

Re: [Connectivity] New SB6120/6121 Firmware Released

Could have been an issue on Comcast's CMTS end that got messed up somehow and got straigtened out during a maintenance cycle. Phantom glitches.

catnapped

join:2010-11-22
Elizabethtown, PA
It is something of concern that there's a T4 that stays on top of the log and keeps changing its time on a refresh of the log page? Seems to update the time mark every 30 seconds. Don't remember if I was seeing that before 1.0.6.6 showed up.


koitsu
Premium,MVM
join:2002-07-16
Mountain View, CA
kudos:23
said by catnapped:

It is something of concern that there's a T4 that stays on top of the log and keeps changing its time on a refresh of the log page? Seems to update the time mark every 30 seconds. Don't remember if I was seeing that before 1.0.6.6 showed up.

Repeated issues of the exact same type/error simply update the timestamp of the top row log entry, rather than continually prepend additional rows.

What you describe indicates continual T4 timeouts, not occasional. Occasional T4 timeouts are acceptable. Constant, non-stop T4s are not. What you describe is indicative of a different problem and is not firmware related. Please start another thread or engage folks in the Comcast Direct forum for assistance; something at the head-end needs to be investigated.
--
Making life hard for others since 1977.
I speak for myself and not my employer/affiliates of my employer.


andyross
Premium,MVM
join:2003-05-04
Schaumburg, IL
reply to catnapped
said by catnapped:

It is something of concern that there's a T4 that stays on top of the log and keeps changing its time on a refresh of the log page? Seems to update the time mark every 30 seconds. Don't remember if I was seeing that before 1.0.6.6 showed up.

If you look at your signals, one of your upstream channels is probably listed as 'T4 Timeout'. That means it cannot connect on that one. Sometimes, rebooting will get it to connect. If you signals are marginal, it may occur again.


tshirt
Premium
join:2004-07-11
Snohomish, WA
kudos:5
reply to catnapped
T4's are often associated with upstream noise, so you could call in and ask what your upstream SNR is like.


andyross
Premium,MVM
join:2003-05-04
Schaumburg, IL
One of the interesting things is that, when people have posted issues on 3-channel upstream bonding with a T4'd channel, it's always the middle channel, even if it's not the middle frequency.


koitsu
Premium,MVM
join:2002-07-16
Mountain View, CA
kudos:23
said by andyross:

One of the interesting things is that, when people have posted issues on 3-channel upstream bonding with a T4'd channel, it's always the middle channel, even if it's not the middle frequency.

I cannot confirm this. Proof from my cable modem polling script logs, with firmware 1.0.6.6, are below.

Apologies for the syntax changes in the log too (I removed the modulation type sometime in late August to make things easier to read):


Let's pick August 17th as a test subject:


The order you see these channels in is the order they're shown in the actual "Signal" web page interface (from left to right).

--
Making life hard for others since 1977.
I speak for myself and not my employer/affiliates of my employer.

catnapped

join:2010-11-22
Elizabethtown, PA
reply to andyross
said by andyross:

If you look at your signals, one of your upstream channels is probably listed as 'T4 Timeout'. That means it cannot connect on that one. Sometimes, rebooting will get it to connect. If you signals are marginal, it may occur again.

Yep...middle channel/middle (upload) frequency that had the T4. Rebooted and got rid of it, but we'll see how long it lasts....