Network Working Group Y. Teramoto
Internet-Draft Kyoto University
Intended status: Informational R. Atarashi
Expires: August 22, 2013 IIJ Research Laboratory
Y. Atarashi
Alaxala Networks Corp.
Y. Okabe
Kyoto University
Feb 18, 2013
Experience of Designing Network Management System
draft-teramoto-experience-network-management-00
Abstract
This document describes our experiences from designing and
implementing a large-scale local area network management system using
mainly NETCONF. We designed the data models for device
configurations and implemented NETCONF client to centrally control
multiple devices of various vendors. The document provides insight
on strong and weak points of current NETCONF approach. The document
also makes some recommendations about NETCONF and future network
management protocols.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Implementing NETCONF Client . . . . . . . . . . . . . . . . . . 3
2.1. Transport protocol . . . . . . . . . . . . . . . . . . . . 3
2.2. Exchanging hello message . . . . . . . . . . . . . . . . . 3
2.3. lock and commit mechanism . . . . . . . . . . . . . . . . . 3
3. Designing Data Models . . . . . . . . . . . . . . . . . . . . . 4
3.1. YANG . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.2. RPC . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4. conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . 4
5. Security Considerations . . . . . . . . . . . . . . . . . . . . 4
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 4
7. Normative References . . . . . . . . . . . . . . . . . . . . . 4
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 4
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1. Introduction
This document discuss our experiences from designing and implementing
a large-scale local area network management system. In this
document, the large-scale local area network is supposed to be
composed by multiple network intelligent network devices of several
vendors.
We mainly used NETCONF[RFC6020][RFC6241][RFC6242] to get and edit
configurations of network devices. NETCONF, however, is a developing
protocol on model layer, therefore there are several data model
designs by vendors. We designed the unified data models for device
configurations to manage multiple devices of various vendors.
Furthermore we implemented NETCONF client to control multiple devices
asynchronously.
This document evaluates the NETCONF protocol design and makes some
recommendations about NETCONF and future network management protocols
to support large-scale network management.
2. Implementing NETCONF Client
2.1. Transport protocol
* The tune of transport layer is often required on large scale
systems
* NETCONF requires SSH implementation; however this protocol makes it
difficult to create high-performance implementation
2.2. Exchanging hello message
* NETCONF does not define procedure to invoke errors on hello message
exchange.
* The error handling is different between vendors.
* NETCONF should support hello fail message.
2.3. lock and commit mechanism
Lock mechanism of NETCONF is useful on control multiple devices
safely.
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3. Designing Data Models
3.1. YANG
The approach of YANG is to express various configuration format;
however it makes the issue of complexity of data model schema.
3.2. RPC
Some bad patterns in XML schema.
4. conclusion
5. Security Considerations
6. IANA Considerations
7. Normative References
[RFC6020] Bjorklund, M., "YANG - A Data Modeling Language for the
Network Configuration Protocol (NETCONF)", RFC 6020,
October 2010.
[RFC6241] Enns, R., Bjorklund, M., Schoenwaelder, J., and A.
Bierman, "Network Configuration Protocol (NETCONF)",
RFC 6241, June 2011.
[RFC6242] Wasserman, M., "Using the NETCONF Protocol over Secure
Shell (SSH)", RFC 6242, June 2011.
Authors' Addresses
Yasuhiro Teramoto
Graduate School of Informatics Kyoto University
Yoshida-Hommachi
Sakyo-ku, Kyoto 606-8501
Japan
Phone: +81-75-753-7417
Fax: +81-75-753-7440
Email: teramoto@net.ist.i.kyoto-u.ac.jp
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Ray S. Atarashi
IIJ Research Laboratory
Jinbocho Mitsui Bldg., 1-105 Kanda Jinbo-cho
Chiyoda-ku, Tokyo 101-0051
Japan
Phone: +81-3-5205-6464
Fax: +81-3-5205-6466
Email: ray@iijlab.net
Yoshifumi Atarashi
Alaxala Networks Corp.
Shin-Kawasaki Mitsui Bldg.
890 Saiwai-ku Kashimada
Kawasaki, Kanagawa 212-0058
Japan
Phone: +81-44-549-1735
Fax: +81-44-549-1272
Email: atarashi@alaxala.net
Yasuo Okabe
Academic Center for Computing and Media Studies Kyoto-University
Yoshida-Hommachi
Sakyo-ku, Kyoto 606-8501
Japan
Phone: +81-44-549-1735
Fax: +81-44-549-1272
Email: okabe@i.kyoto-u.ac.jp
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