Frequent double-reboot on Hub 2ac

[Tom41]

We have had a Super Hub 2ac for several years now and have been happy with the service when it's working. I've always been of the mindset that "if it ain't broke don't fix it" so never upgraded. But sometimes the Hub decides to reboot itself for no apparent reason, comes back online, then about a minute later goes through the reboot sequence a second time! The double-reboots have been happening more frequently as time goes on, so I'm wondering if the Hub might be dying. The 2ac is quite old by today's standards so I'm wondering whether a Hub 4 or 5 might be better.

There are no unusual messages showing on the network log; nothing that might trigger a reboot (such as a firmware upgrade). Is anybody else having double-reboots on the hub? Can a new hub simply be sent out for self-install, or would an engineer visit be required?

[Tudor]

Need much more investigation before VM would replace the hub. Are there any dates of 01/01/1970 in the log? If not it is probably just lost the connection to the CMTS. Please post full set of stats and also check to see if there are any problems in your local area.

Check with Area faults on 0800 561 0061 If you have a VM landline 150 this goes down to post code level. You could also try the web page http://www.virginmedia.com/servicechecker

[Tom41]

These are the last few entries in the router log; don't see anything out of the ordinary here (I censored my IP).

05/01/2022 08:47:09 GMT	05/01/2022 08:47:09 GMT	Error (4)	68010302	DHCP WAN IP - xx.xx.xx.xx
05/01/2022 08:46:09 GMT	05/01/2022 08:46:09 GMT	Error (4)	68000407	TOD established
Time Not Established	Time Not Established	Notice (6)	84000510	Downstream Locked Successfully
05/01/2022 08:42:35 GMT	05/01/2022 08:42:35 GMT	Error (4)	68010302	DHCP WAN IP - xx.xx.xx.xx
05/01/2022 08:41:31 GMT	05/01/2022 08:41:31 GMT	Error (4)	68000407	TOD established
Time Not Established	Time Not Established	Notice (6)	84000510	Downstream Locked Successfully
04/01/2022 23:03:31 GMT	04/01/2022 23:03:31 GMT	Error (4)	68000411	TOD error 4950 msec
03/01/2022 22:40:50 GMT	03/01/2022 22:40:50 GMT	Error (4)	68000411	TOD error 4400 msec
02/01/2022 22:17:12 GMT	02/01/2022 22:17:12 GMT	Error (4)	68000411	TOD error 4980 msec

I have reset the Pre and Post RS errors just now and will see how many come up overnight.

[jbrennand]

I still use the SH2 and have refused any invites for "free upgrades" for a number of reasonsrelated to the Puma6 chipset issues in the Hub3/4 and now the "bugi-ness" of the Firmware of the Hub4/5.

However, I have always used it in modem mode with my own router and wireless equipment. Do you have access to a router you could test yours on and see if its stablewhen thatis attached to your Hub in modem mode?

[Tom41]

After approximately 24 hours this is the result. Thought I'd also post the downstream power levels and such in case any are out of spec. Quite a few pre-RS errors (particularly on the lower channels) but not a single post-RS error. Internet seems to have been good today with no reboots or dropouts.

Frequency (Hz)	298750000	266750000	274750000	282750000	290750000	306750000	314750000	322750000
Lock Status(QAM Lock/FEC Sync/MPEG Lock)	Locked	Locked	Locked	Locked	Locked	Locked	Locked	Locked
Channel ID	21	17	18	19	20	22	23	24
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)	-0.99	-0.72	-1.41	-1.71	-0.91	-1.58	-1.09	-0.40
RxMER (dB)	37.94	37.64	37.09	37.09	38.26	37.94	37.94	38.26
Pre RS Errors	716	634	229	103	31	7	9	14
Post RS Errors	0	0	0	0	0	0	0	0

[jbrennand]

SH2's always show a few hundred PreRs errors (mine does too) ... I was told ages ago that this is just a "feature" of how they connect to the network - that Hub3/4 dont have/do 🙂