1. Speaker: Hui-Hsiung Chung Date:2011-09-21
XMPP
Speaker: Hui-Hsiung Chung
Date:

2. OUTLINE Introduction Architecture Application
Network Management Protocols
Comparison
Conclusion
Reference

3. INTRODUCTION Extensible Messaging and Presence Protocol
XMPP
Jabber
RFC 3920(Obsoleted by 6120)
 An open-standard communications protocol
Distributed
Based on XML(Extensible Markup Language)
Regarded as a competitor to Session Initiation Protocol for Instant Messaging and Presence Leveraging Extensions(SIMPLE)

4. INTRODUCTION CONT. Advantages: Disadvantage: Decentralization Security
Anyone can run their own XMPP Server
Security
Isolate from public network
Robust security(SASL and TLS)
Disadvantage:
Plain text data
Need to parse

5. PACKET FORMAT

6. ARCHITECTURE gmail.com Internet grizzly.cloudip6.com
grizzly.cloudip6.com
gmail.com

7. APPLICATION Network Management Mobile Device Instant Message(IM) IM
Internet IM
XMPP UA
Wireless sensor network
XMPP server

8. NETWORK MANAGEMENT PROTOCOLS
Session Initiation Protocol
SIP
RFC 3261
Simple Network Management Protocol
SNMP
RFC 1157(V.1)

9. COMPARISON XMPP SIP SNMP Packet Format ASCII(XML) Binary Transport TCP
UDP
Working in NAT
Yes No
Addressing
URI
IP Address
URI: Uniform Resource Identifier

10. COMPARISON CONT. XMPP SIP Register to one server No Yes Presence TCP
UDP
Redirect
HTTP

11. CONCLUSION XMPP is extensible and flexible
XMPP costs more traffic than SNMP
Much reliable than default SIP
Security issue
No multi-media supports

12. REFERENCE Wiki-XMPP Wiki-SNMP IM Technology Overview
SIP: The Clear Choice for Smart Grid Communications
Mong-Fong Horng; Mao-Hsiung Hung; Yi-Ting Chen; Jeng-Shyang Pan; Wen Huang. “A New Approach based on XMPP and OSGi Technology to Home Automation on Web”. Computer Information Systems and Industrial Management Applications (CISIM), 2010 International Conference

13. Q&A

14. APPENDIX XMPP server install Configuration Start Add user
Activate EPEL-Repository
$yum install ejabbered
Configuration
/etc/ejabberd/ejabberd.cfg
Add hosts
{hosts, ["example.com"]}.
Add admin
{acl, admin, {user, “username”, “example.com”}}.
Start
/etc/init.d/ejabberd start
Add user
ejabberdctl register username example.com password