A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Fine-Grained Control of Control-Plane Performance: Use Cases and Mechanisms
Author(s) : Li Erran Li
Yan Luo
Haibin Song
Y. Richard Yang
Filename : draft-li-cp-usecases-00.txt
Pages : 7
Date : 2013-07-15
Abstract:
It is commonly assumed that a system controller or network management
system has complete knowledge of the data plane, especially in a
software-defined network (SDN). That is, the controller knows
performance metrics such as the flow table size of each switch, the
rate of rule updates between a switch control plane and its data
plane, and the maximum latency to install a rule in the flow table of
a switch. However, in reality, this is not the case. Measurement
studies show that the flow table size depends on the structure of the
rules installed. The flow table size is much smaller if there are
many wild card rules. The setup latency also depends on the already
installed rules. If there are many wild card rules installed, the
latency can be much higher. Currently, data centers pre-setup the
rules long before the actual associated traffic starts to flow
through the network. This puts constraints on the use cases. In
this document, we first show that many use cases demand a more
predictable control plane. The use cases are applied to networks
that require control-plane performance information for dynamic
configuration, as well as SDN networks. We then discuss potential
mechanisms to enable fine-grained control of control-plane
performance.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-li-cp-usecases
There's also a htmlized version available at:
http://tools.ietf.org/html/draft-li-cp-usecases-00
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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