120M : Only one upstream

[arcimedes]

Sometime ago there was a "scheduled maintenance" outage and when service resumed I only had 1 upstream channel. On posting on the VM forums I was advised that the other channel would eventually appear.

It doesn't cause any problems upload is as fast as ever
I am on 152Mb service.

I just wonder whether to moan at VM again?

Upstream US-1 US-2 US-3 US-4
Channel Type 2.0 N/A N/A N/A
Channel ID 50 N/A N/A N/A
Frequency (Hz) 39400000 N/A N/A N/A
Ranging Status Success Other Other Other
Modulation 16QAM N/A N/A N/A
Symbol Rate (Sym/sec) 5120000 N/A N/A N/A
Mini-Slot Size 4 N/A N/A N/A
Power Level (dBmV) 42.00 N/A N/A N/A
T1 Timeouts 0 0 0 0
T2 Timeouts 0 0 0 0
T3 Timeouts 0 0 0 0
T4 Timeouts 0 0 0 0


Downstream DS-1 DS-2 DS-3 DS-4 DS-5 DS-6 DS-7 DS-8
Frequency (Hz) 442250000 450250000 458250000 466250000 474250000 482250000 490250000 498250000
Lock Status(QAM Lock/FEC Sync/MPEG Lock) Locked Locked Locked Locked Locked Locked Locked Locked
Channel ID 5 6 7 8 9 10 11 12
Modulation 256QAM 256QAM 256QAM 256QAM 256QAM 256QAM 256QAM 256QAM
Symbol Rate (Msym/sec) 6.952000 6.952000 6.952000 6.952000 6.952000 6.952000 6.952000 6.952000
Interleave Depth I=12
J=17 I=12
J=17 I=12
J=17 I=12
J=17 I=12
J=17 I=12
J=17 I=12
J=17 I=12
J=17
Power Level (dBmV) 2.51 2.25 1.63 1.99 1.95 1.47 1.48 1.61
RxMER (dB) 37.09 37.09 36.84 37.09 37.09 37.09 37.09 37.09
Pre RS Errors 19330 13615 4384 4269 318 449 488 559
Post RS Errors 0 0 0 0 0 0 0 0

[Sephiroth]

I think the question to put on the VM forum is "Why do I only have one US channel?"

It's unusual and if everyone else on your node has the same, congestion is likely.

[arcimedes]

The following messages were sent and received on the VM 152Mb board on 4 Dec 2014 and replied on 10 Dec 2014.

There was a an outage yesterday between 10.00 and 12.00 which on the status message it appeared to be some sort of scheduled maintenance. After the service came back I noticed that I only had one upstream channel instead of the two I had before. It doesn't seem to have made any difference to the upload and download speeds. Signal levels are well within spec.

Reply

I've checked this out for you, it appears to be a result of the recent maintenance, it won't affect the speed or performance, I anticipate you will see 2 upstreams again soon.



If any problems develop, let me know and I'll check it out for you :smileyhappy:


I will give them another prompt

[Sephiroth]

That answer's fair enough.

[General Maximus]

I remember someone else having the same problem and the second upstream was added back a few days later

[sollp]

More likely a config issue, they probably haven't copy and pasted the correct config...again

[arcimedes]

Reply from VM forum received today

"Thanks for the bump, I've just rechecked your cable and there's no upstream bonding group configured on it as of yet.

As Kev has mentioned this shouldn't impact upstream speeds at all."

So I guess we leave it at the moment as its not causing any problems.