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Automatic end-host configuration Research Project 1 Sebastian - - PowerPoint PPT Presentation

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Introduction Zerconf Implementations Test-Environment Results Conclusion Demo Questions Automatic end-host configuration Research Project 1 Sebastian Dabkiewicz System And Network Engineering University of Amsterdam 8th February 2012 1

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Introduction Zerconf Implementations Test-Environment Results Conclusion Demo Questions

Automatic end-host configuration

Research Project 1 Sebastian Dabkiewicz

System And Network Engineering University of Amsterdam

8th February 2012

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Introduction Zerconf Implementations Test-Environment Results Conclusion Demo Questions Research Question Environment

Research Question

Research Question How can one create an automatic end-host confguration? Sub-Research Questions What are the requirements for a fast establishment of the connection? What is the current situation? What kind of implementations are available? What kind of configuration is needed? Is there support for a cross platform solution?

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Introduction Zerconf Implementations Test-Environment Results Conclusion Demo Questions Research Question Environment

Environment

Circuit-based networks Built for long time Time intensive to build Automated GLIF Open Lightpath Exchanges (GOLE) with Network Service Interface (NSI) from Global Lambda Integrated Facility (GLIF)

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Introduction Zerconf Implementations Test-Environment Results Conclusion Demo Questions Research Question Environment

Goal

Quick online Almost no configuration (Zeroconf) Cross-platform

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Introduction Zerconf Implementations Test-Environment Results Conclusion Demo Questions Link local addresses multicast DNS DNS Service-Discovery

Zerconf

Link local addresses Multicast DNS DNS Service Discovery

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Introduction Zerconf Implementations Test-Environment Results Conclusion Demo Questions Link local addresses multicast DNS DNS Service-Discovery

IPv4 Link Local address

IP range 169.254/16 Not routable 3 ARP probes to verify address is available RFC 3927 - Dynamic Configuration of IPv4 Link-Local Addresses

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Introduction Zerconf Implementations Test-Environment Results Conclusion Demo Questions Link local addresses multicast DNS DNS Service-Discovery

IPv6 Link Local address

fe80::/64 Derived from MAC-Address Present on every interface RFC 4291 - IP Version 6 Addressing Architecture RFC 4862 - IPv6 Stateless Address Autoconfiguration MAC to IPv6ll MAC-Address: 00:15:c5:e1:41:bf Becomes: fe80::215:c5ff:fee1:41bf/64

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Introduction Zerconf Implementations Test-Environment Results Conclusion Demo Questions Link local addresses multicast DNS DNS Service-Discovery

multicast DNS

221.0.0.254 & ff02:0:0:0:0:0:0:fb Listen on port 5353 .local. like vanilla.local. IETF Draft - Multicast DNS - Dec 9, 2011

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Introduction Zerconf Implementations Test-Environment Results Conclusion Demo Questions Link local addresses multicast DNS DNS Service-Discovery

DNS Service-Discovery

Discover services DNS SRV Service Types e.g.

  • ssh. tcp

IETF Draft - DNS-Based Service Discovery - Dec 9, 2011

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Introduction Zerconf Implementations Test-Environment Results Conclusion Demo Questions

Implementations

Two main implementations Bonjour

Shipped with MAC OS X Available for Windows

Avahi

Open source implementation Linux, BSD

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Introduction Zerconf Implementations Test-Environment Results Conclusion Demo Questions

Implementations

Two main implementations Bonjour

Shipped with MAC OS X Available for Windows

Avahi

Open source implementation Linux, BSD

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Introduction Zerconf Implementations Test-Environment Results Conclusion Demo Questions Server installation Clients

Test-Environment

Servers

Ubuntu 11.10

Clients

MAC mini with MAC OS X Windows 7 Professional laptop

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Introduction Zerconf Implementations Test-Environment Results Conclusion Demo Questions Server installation Clients

Test-Environment

Servers

Ubuntu 11.10

Clients

MAC mini with MAC OS X Windows 7 Professional laptop

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Introduction Zerconf Implementations Test-Environment Results Conclusion Demo Questions Server installation Clients

Test-Environment

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Introduction Zerconf Implementations Test-Environment Results Conclusion Demo Questions Server installation Clients

avahi-daemon

Main part of Avahi Configuring parameters avahi-daemon configuration file use-ipv4=yes use-ipv6=no allow-interfaces=eth1 deny-interfaces=eth0

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Introduction Zerconf Implementations Test-Environment Results Conclusion Demo Questions Server installation Clients

avahi-autoipd

creates interface ethX:avahi ipv4ll address

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Introduction Zerconf Implementations Test-Environment Results Conclusion Demo Questions Server installation Clients

avahi-utils 1

avahi-browse browse the network for services resolve services

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Introduction Zerconf Implementations Test-Environment Results Conclusion Demo Questions Server installation Clients

avahi-utils 2

avahi-publish Publish services Name SRV-type Port

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Introduction Zerconf Implementations Test-Environment Results Conclusion Demo Questions Server installation Clients

avahi-utils 3

avahi-resolve Resolve Hostname Resolve IP-address

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Introduction Zerconf Implementations Test-Environment Results Conclusion Demo Questions Server installation Clients

Clients

Mac Mini

MAC OS X No additional installation

Windows Laptop

Windows 7 Professional Installation of Safari browser Bonjour control panel

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Introduction Zerconf Implementations Test-Environment Results Conclusion Demo Questions

Interface configuration

Interface configuration is needed No DHCP! Time-out takes 5 minutes Use ipv4ll Interface configuration /etc/network/interfaces (...) auto eth1 iface eth1 inet ipv4ll

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Introduction Zerconf Implementations Test-Environment Results Conclusion Demo Questions

Cross platform

avahi-publish Windows 7

installation of Bonjour needed Bonjour SDK

Mac OS X

Works out of the box

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Introduction Zerconf Implementations Test-Environment Results Conclusion Demo Questions

Timing

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Introduction Zerconf Implementations Test-Environment Results Conclusion Demo Questions

Avahi-resolve

Avahi standard publishes AAAA-record on IPv4 Shows first IPv6 record then IPv4 record Use -4 or -6 switch to get direct the correct record

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Introduction Zerconf Implementations Test-Environment Results Conclusion Demo Questions

Multicast-DNS

Problems using dig to resolve hostname Packet send out on eth0 (internet interface) Add static route for 224.0.0.251/32

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Introduction Zerconf Implementations Test-Environment Results Conclusion Demo Questions

DNS Service Discovery

Not every service is announced Avahi provides XML-file format *.service

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Introduction Zerconf Implementations Test-Environment Results Conclusion Demo Questions

Conclusion

Zeroconf fits in the situation On servers some configuration needed Quick online, about 6 seconds

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Introduction Zerconf Implementations Test-Environment Results Conclusion Demo Questions

Demo

Demo Demo with Mac mini and evocam

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Introduction Zerconf Implementations Test-Environment Results Conclusion Demo Questions Questions

Questions?

Questions?

Report & Presentation available at: http://goo.gl/FmfKf and http://goo.gl/ruWEQ

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