On Wed, Jan 12, 2022 at 7:46 AM Dave Taht <dave.t...@gmail.com> wrote:
> > > On Wed, Jan 12, 2022 at 7:37 AM Adam Thompson <athomp...@merlin.mb.ca> > wrote: > >> Before you start reading, yes, I fully understand how silly this question >> is. But I need to give _*something*_ to a customer who has the ability >> to run ping/traceroute but nothing else. (And they have an intermittent >> latency problem that we haven’t been able to isolate yet.) >> > > Over on this enormous thread, a gang of dedicated openwrt developers have > been attempting to build an automated latency with load sensing tool > leveraging sch_cake, currently targetted at LTE. They've released a few > versions of the tool in lua and shell, so far. > > Among other things, they've discovered that icmp type 13 (with a > timestamp) actually works in many cases, and have a curated list mechanism, > and > means to kick out and cope with various forms of responders. > oops, the link: https://forum.openwrt.org/t/cakes-autorate-ingress/108848/ > >> >> Does anyone curate a list of “useful” ICMP responders that are at least >> kinda-sorta reliable/expected to continue responding? For example, all the >> major anycast DNS cloud providers respond to ICMP, but I don’t really want >> to tell my customer to ping an anycast IP address because the RTT results >> will be useless data (for comparative purposes). >> >> I’m also not excited about providing random router IP address for what >> should be obvious reasons. There are some IPs that my routing paths that >> should be stable, but between routing changes and control-plane policing, >> those aren’t awesome. I’m looking for IPs I can suggest that are well >> outside my network. >> >> >> >> Restatement: yes, there are much better ways to diagnose problems, but my >> customer can only run ping & traceroute (and pathping, I suppose) and is >> capable enough to run those tools and self-assess before calling me. >> >> >> >> It sounds foolish to even ask, but maybe there’s a resource out there I >> don’t know about… >> >> -Adam >> >> >> >> *Adam Thompson* >> Consultant, Infrastructure Services >> [image: MERLIN] >> 100 - 135 Innovation Drive >> Winnipeg, MB, R3T 6A8 >> (204) 977-6824 or 1-800-430-6404 (MB only) >> athomp...@merlin.mb.ca >> www.merlin.mb.ca >> >> >> > > > -- > I tried to build a better future, a few times: > https://wayforward.archive.org/?site=https%3A%2F%2Fwww.icei.org > > Dave Täht CEO, TekLibre, LLC > -- I tried to build a better future, a few times: https://wayforward.archive.org/?site=https%3A%2F%2Fwww.icei.org Dave Täht CEO, TekLibre, LLC
