TLV-11 Unrecognized OID

What do the modem's signal stats look like ? Try getting them here; http://192.168.100.1 or here http://10.0.0.1

Please post the *Downstream Power Level*, the *Upstream Power Level*, and the *SNR* (Signal to Noise Ratio) numbers.

What is the exact make and model number of the modem ?

Is this a WiFi connection ?

The upstream power is on the high side and it may be intermittently fluctuating even higher to out of spec levels. And the downstream power is on the low / weak side. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the un-bonding of channels.

In an effort to try to obtain better connectivity / more wiggle room, check to see if there are there any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1000 MHz, bi-directional, and no gold colored garbage from Radio Shack, Home Depot, Target, etc. Splitters should be swapped with known to be good / new ones to test.

Also check the coax cable for any damage such as cuts, nicks, kinks, sharp bends, etc.

If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two-way splitter connected directly off of the drop from the street / pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.

Good luck with it !

Thanks.  The Xfinity tech has already been on site, tested all the fittings and swapped the only splitter in my apartment.  I have no access to the wiring beyond the plug in my living room.  

Is it worth it to replace their coax with my own?

Would a different router vendor ( Linksys, Netgear) make a difference based on what you have seen?

Thanks for all the input.  

I would get the techs involved again. Keep on them until it is fixed properly !

Bear in mind that if the premises facing techs can not find or fix a problem at your home, it is they who are responsible for escalating it to their line / network / maintenance dept. techs. The problem may lie beyond your home in the local neighborhood infrastructure somewhere but it is their S.O.P. to start at the home.

Good luck !

It's not the equipment, it's the lines. A line impairment / connection quality issue will still be there no matter what equipment is used. Just bear in mind that some makes / models of equipment are more tolerant / forgiving of less than stellar signals.