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. > > > 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
