A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Data-plane probe for in-band telemetry collection
Author : Petr Lapukhov
Filename : draft-lapukhov-dataplane-probe-00.txt
Pages : 16
Date : 2016-03-18
Abstract:
Detecting and isolating network faults in IP networks has
traditionally been done using tools like ping and traceroute (see
[RFC7276]) or more complex systems built on similar concepts of
active probing and path tracing. While using active synthetic probes
is proven to be helpful in detecting data-plane faults, isolating
fault location has proven to be a much harder problem, especially in
diverse networks with multiple active forwarding planes (e.g. IP and
MPLS). Moreover, existing end-to-end tools do not generally support
functionality beyond dealing with packet loss - for example, they are
hardly useful for detecting and reporting transient (i.e. milli- or
even micro-second) network congestion.
Modern network forwarding hardware can enable more sophisticated
data-plane functionality that provides substantial improvement to the
isolation and identification capabilities of network elements. For
example, it has become possible to encode a snapshot of a network
elements forwarding state within the packet payload as it transits
the device. One example of such device/network state would be queue
depth on the egress port taken by that specific packet. When
combined with a unique device identifier embedded in the same packet,
this could allow for precise time and topological identification of
the the congested location within the network.
This document proposes a standard format for embedding telemetry
information in UDP-based probing packets, i.e. packets designated for
testing the network while not carrying application traffic. These
active probes could be conveyed over multiple protocols (ICMP, UDP,
TCP, etc.) but this document specifically focuses on UDP, given its
simple semantics. In addition this document provides recommendations
on handling the active probes by devices that do not support the
required data-plane functionality.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-lapukhov-dataplane-probe/
There's also a htmlized version available at:
https://tools.ietf.org/html/draft-lapukhov-dataplane-probe-00
Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
_______________________________________________
I-D-Announce mailing list
I-D-Announce@ietf.org
https://www.ietf.org/mailman/listinfo/i-d-announce
Internet-Draft directories: http://www.ietf.org/shadow.html
or ftp://ftp.ietf.org/ietf/1shadow-sites.txt
