Tools
Path ping
What it does: like Traceroute, but it then sends a burst of pings to EACH hop and measures how much gets lost and how slow each one is. It's the best tool for "the connection is flaky/slow — where on the path is it going wrong?" Same IPv4/IPv6/Auto picker as Ping/Trace.
What you need: a destination (name or IP); it pre-fills your gateway. Nothing else to set.
Safe to run: yes — passive. It takes longer than a plain trace because it measures every hop.
What to expect / reading results: one row per hop with its packet-loss % and average time. Scan down for the FIRST hop where loss or latency jumps and stays high — that's your prime suspect. One caveat: loss showing ONLY on the final hop while every hop before it is clean usually just means the destination limits how fast it answers pings, not a real problem.