[Cerowrt-devel] [aqm] ping loss "considered harmful"
touch at isi.edu
Mon Mar 2 16:53:13 EST 2015
On 3/2/2015 1:40 AM, Brian Trammell wrote:
> The real solution is to create a utility called "ping" that uses
> traffic that gets prioritized the same way as the traffic you care
> about instead of ICMP echo request/reply. Users don't care about
> the packets on the wire so much as they do that you're supposed to
> ping things.
There are three separate problems:
1. a ping that doesn't use ICMP
there are dozens of these
2. needing a reflector
ping gets around this only because the reflector is widely
deployed (and integrated into most OSes)
3. using the same port as the traffic you care about
transport protocol is only one problem (ICMP being a "transport
protocol" by virtue of using the IP protocol number field)
the other is differential prioritization based on port number
there's no easy solution to that;
every service would need an integrated
I suspect #3 is the ultimate killer of this idea.
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