A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Layer 4 Path preference negotiation for DPS
Author : Arunkumar Arumuga Nainar
Filename : draft-arumuganainar-rtgwg-dps-l4-ppn-01.txt
Pages : 11
Date : 2014-10-04
Abstract:
This document is a supporting draft to draft-arumuganainar-rtgwg-DPS-
Requirements-01. The DPS draft talks about high level architecture to
implement dynamic path selection based on application. The DPS draft
suggests the implementation to be done in three steps:
1) DPS Signaling: Here participating routers communicate with each
other to exchange application related information
2) Profile Based Filter: This section describes how packets can be
classified and filtered
3) DPS Routing Frame Work: This ensures that separated traffic
remains separated through out the network
While overall architecture is still valid, this draft suggests an
enhancement to the DPS Signaling component. The currently implemented
technique uses BGP for the signaling requirements. Whilst this is
good for certain cases, applications that can be off loaded to the
secondary link are pre-decided. It restricts behavior from responding
to dynamic network conditions. For example, a network administrator
would want to off load some of the non-critical applications over the
secondary link, however when there is acute congestion within the
network, they might want the router to behave aggressively by off
loading more applications to the secondary circuit. Yet while doing
so there should not be any asymmetric routing on the network.
Since BGP is essentially a control plane protocol, it is not aware of
what is happening on the network in the forwarding plane, hence there
is a need to do the signaling in the forwarding plane. This drafts
suggest one such mechanism. Here the idea is to exchange the Path
Preference information at layer 4 level. Such signaling could happen
during TCP connection establishment phase. When done this way, a
decision can be taken for each of the session and hence making it
more dynamic than the one that can achieved through BGP.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-arumuganainar-rtgwg-dps-l4-ppn/
There's also a htmlized version available at:
http://tools.ietf.org/html/draft-arumuganainar-rtgwg-dps-l4-ppn-01
A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=draft-arumuganainar-rtgwg-dps-l4-ppn-01
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/
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