[ippm] Demo: IOAM Ping using ICMPv6 Loopback

[Tal Mizrahi <[e-mail]>]

Hi,

We have recently proposed ICMPv6 Loopback, a new ICMPv6 type which is
similar to ICMPv6 Echo, except that the Loopback reply includes the
IPv6 header, extension headers and IPv6 payload of the corresponding
Loopback request.
https://datatracker.ietf.org/doc/draft-mcb-intarea-icmpv6-loopback/

In the context of IOAM this means that an IOAM encapsulating node can
send an ICMPv6 Loopback request that includes an IOAM option, and the
Loopback reply includes the IOAM data of the request. This can be
used, for example, in a Ping-like application.

We have prepared a demo which leverages the existing IOAM
implementation in the Linux kernel, and uses ICMPv6 Loopback in order
to implement a Ping-like utility that presents the IOAM data of the
nodes along the path.

An example of the output of IOAM Ping with two IOAM nodes is shown
below, with three data fields per hop (Hop limit/node id, timestamp
seconds, timestamp fraction).

PING db01::1 (db01::1) 56 data bytes
152 bytes from db01::1: icmp_seq=1 ttl=64 time=0.192 ms IOAM:
NodeID=1,HopLim=64,RcvTime=NA
NodeID=2,HopLim=63,RcvTime=1712811441.126
152 bytes from db01::1: icmp_seq=2 ttl=64 time=0.078 ms IOAM:
NodeID=1,HopLim=64,RcvTime=NA
NodeID=2,HopLim=63,RcvTime=1712811442.129

The demo is available at:
https://github.com/talmi/IOAM-Ping-Demo

Feedback about ICMPv6 Loopback and about the Ping demo will be welcome.

Thanks,
The authors.