Re: Charging for IPs

[Lukas Tribus via NANOG <nanog () lists nanog org>]

On Mon, 7 Sept 2026 at 17:48, Saku Ytti <saku () ytti fi> wrote:
> On Mon, 7 Sept 2026 at 17:13, Lukas Tribus via NANOG
> <nanog () lists nanog org> wrote:
>
> > We loose interface information in traceroutes if use loopbacks for
> > ICMP errors. I'd immagine people have different opinions about whether
> > this is a problem or not.
>
> There is RFC about ICMP-EO to attach this metadata, including device
> name as well as actual port (not the ECMP logical but physical).
> This ICMP-EO would allow you to reliably troubleshoot which port is
> actually lossy, as well as it would allow you to automatically
> discover what ports to set in your QoS measurement, to capture all
> paths

Thanks, that would be RFC 5837, I did not know about that one.

Looks like Arista has joined Juniper in implementing this [1] and
Linux has it since 6.19.


[1] https://arista.my.site.com/AristaCommunity/s/question/0D5Uw000001yvSvKAI/eos-support-for-rfc5837-icmp-extensions
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