AT&T Fiber Huge Latency and Packet Loss - Cumming, Georgia

If I am reading this correctly, you have nearly 1 SECOND latency to your in-home third-party Router (192.168.1.1).  You cannot in any way say that problem is outside your home, or even related to your AT&T service.

I would not try looking at anything else until your in-home latency is 1 ms or less.

Router is hard-wired to the AT&T device with a 1-foot CAT6.  Again in the middle of the night there is no latency and packet loss.

Here's one where the latency is 74 milliseconds between the router and the AT&T device, but the downstream is still very bad.  What do you make of that?

100 "%PL" on a hop where hops beyond are responding is not a concern.

Note that using the term "packet loss" for a lack of an error response from a packet with a deliberately imposed error condition is a misuse of the term.  The packet is intended to be "lost."  The metric is measuring the percent of error responses returned.  Note that it is not required that a hop provide the TTL-exhausted error, especially if it is busy doing other things (e.g. routing actual traffic).

Seeing as how hops beyond the 100 %PL hops (that you asked about) have about the same %PL as hop #2 (which is in your home), I again assert that a large part of your problem is before any traffic hits fiber.

Here's one where the latency between the router and the AT&T device is 4.9 milliseconds.  Downstream still very bad.

But your average latency to the Gateway (192.168.1.254) is still 150 ms.  Something is going on between your router and the Gateway.  Latency to your router is 4 ms.  If Wi-Fi, then 4 ms is reasonable.  The 150 ms ts not.

Ok. But what does that have to do with the huge packet loss and high pings downstream?

Here everything is fine between the router and the device. Still high pings and PL downstream.

If a packet gets lost before it gets to your Gateway, it's not going to make it out of your house.  So, if your first hop says 30% loss, you really shouldn't expect your 10th hop to do any better.  The fact that your 2nd hop shows 36% and your 11th and 12th hops show an average of 35% tells me that you have an issue where about 35% of your packets aren't getting to the 2nd hop.  Contrast this to your worry about the 100% packet loss at hops 3, 5, 9 and 10, where (by some incredible miracle if there were actually 100% packet loss) packets beyond them continue to respond at about a 65% rate.  

Likewise, you're seeing a high ping rate inside your house.  If it takes 0.910 seconds for a packet to get to your own router and back, and 1.8 seconds to get to your Gateway and back, by what miracle can you expect a packet to be any faster getting to the Internet???

What is it about your most recent plot (at about Noon today) concerns you?  The 100 %PLs that are obviously not actually a problem because a hop responds beyond them.  Is it the 12 ms latency at the destination?

Ok.  I made a few changes. Just to make sure, I changed the CAT6 cable from the router to the AT&T device.  I noticed that the router had a hard-line out to a powerline adapter that wasn't being used, so I removed that.

Re-tested and the new graph looks much better. Thanks for the tips.