Re: Charging for IPs

[Bryan Holloway via NANOG <nanog () lists nanog org>]

Note that non-default VRF support wasn't added until EOS-4.35.2F, even 
though the commands are there ...


On 9/10/26 23:09, Lukas Tribus via NANOG wrote:
> > Awesome, can't. see the actual Arista url, would be interesting in specifics.
>
> Arista supports RFC5837 since EOS version 4.33.0F on all platforms
> except cEOS (containers).
>
> A public config guide is available here (look for "Support for
> Extended ICMP Errors" halfway down, it is long):
>
> https://www.arista.com/en/um-eos/eos-ethernet-ports
> https://web.archive.org/web/20260910180814/https://www.arista.com/en/um-eos/eos-ethernet-ports
>
> It is enabled per VRF and can be limited by ACL.
>
> It will report back the interface ID, interface name (as it appears in
> EOS), it's MTU and IP address.
>
> The interface name can optionally include the hostname, but that is
> it; and those 2 strings cannot be modified manually - they are what
> they are.
>
> Arista interface names are not wirespeed dependent, they are always
> called Ethernet (or Port-Channel), so compared to reverse DNS it looks
> like the service provider is not able to provide a string of it's own
> choosing.
>
> There is an optional "Node ID extension codepoints" setting, which
> when set Wireshark fails to parse, I did not read the RFC so I'm not
> quite sure what this is about; according to the Arista docs it is
> about identifying the source node (indeed the hex data contains the
> hostname; not the interface/ipv4 or ipv6 addresses that the
> configuration suggests).
>
>
> You can find capture and configs here:
>
> https://www.ltri.net/download/19b9cd22-2f03-4d38-9a5e-21b6bd908b33/arista-icmp-error-extensions.tar
>
>
> > If we can find actual production traceroute, we're sure to get
> > implementations in:
> >
> > https://github.com/fujiapple852/trippy
> > https://github.com/lance0/ttl
>
> I have filed feature requests for both with those captures.
>
>
> > At least trippy will already print all unknown EOs too, so you don't
> > need tshark to confirm.
>
> Yes, with -e --tui-icmp-extension-mode all trippy shows unknown extensions.
>
>
> Lukas
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