A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Priority based Flow Rule Request Message Processing Mechanism in the OpenFlow Switch
Authors : Xinjian Long
Wendong Wang
Xiangyang Gong
Xirong Que
Qinglei Qi
Filename : draft-long-sdnrg-pfrrmpm-openflow-00.txt
Pages : 13
Date : 2016-04-05
Abstract:
In the SDN, the controller is in charge of the maintenance and
administration of variable aspects like the network topology and the
network resources etc. of the whole network. Administrative
strategies are made upon these work and sent to the switches from the
controller so as to instruct the network devices to apply appropriate
policies to the data flows. As for the data packet which reaches the
ingress OpenFlow switch for the first time, the packet itself or a
fraction of the packet will be encapsulated into a packet-in message
and will be sent to the controller to request for a new flow rule.
After the flow-mod message and the packet-out message are sent back
to the switch from the controller, the determined forwarding action
will be applied to the certain data flow.
So far, the inbound latency caused by the creation of the packet-in
message and the outbound latency caused by the receive and the
execution of the flow-mod message are highlighted when it comes to
the concerns about the latency and the effectiveness of the data
transportation in the SDN[Mazu]. Attention to the studies on the
processing order of the flow rule request message like the packet-in
message and the packet-out message is comparatively low. As the SDN
continually grows in scale and complexity and the packets' forwarding
policies become more recursive and dynamic, the number of the
switches under the administration of the same controller is elevated
and unavoidably causes the network congestion problem widespread.
The scale of modern networks and data-centers and the associated
operational expense deteriorates the delay problem in the network
with congestion. The ability to help the services with high priority
be processed without delay becomes critical.
This document proposes the combination of appending a priority tag to
the packet-in message and the Priority based Flow Rule Request
Message Processing Mechanism(PFRRMPM) as a solution to help the data
flow with high priority or lantency-sensitive to acquire the
forwarding rule without or with shorter waiting latency when there
are excess flow rule request messages in the SDN.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-long-sdnrg-pfrrmpm-openflow/
There's also a htmlized version available at:
https://tools.ietf.org/html/draft-long-sdnrg-pfrrmpm-openflow-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/
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