Connect. Communicate. Collaborate Global On-demand Light Paths – Developing a Global Control Plane...

Connect. Communicate. Collaborate

Global On-demand Light Paths – Developing a Global Control Plane

R.Krzywania PSNCA.Sevasti GRNETG.Roberts DANTE

TERENA Networking Conference ‘08, Brugge, Belgium, 19-22.05.2008


AutoBAHN is…

• … a research activity for engineering, automating and streamlining the inter-domain setup of guaranteed capacity (Gbps) end-to-end paths

• … a Joint Research Activity of the GN2 project– GN2 is an European Commission-funded project, with all

the European Research and Education networks (NRENs) as partners

Connect. Communicate. CollaborateAutoBAHN approach

• Control and provisioning has to be distributed• Business-layer related interactions include AA, policies,

advance reservations etc.• Privacy and control of intra-domain resources must be

safeguarded


AutoBAHNarchitecture

A

utoB

AH

N s

yste

m a

D

ata

pla

ne u

Domain Manager

Inter-Domain Manager

Intra-Domain Pathfinder

Topology Abstraction

Reservation Handler

User interface

Timer

User access module

Request handling logicAAI

Resource modelling

Policy module

Inter-domain pathfinder

Technology Proxy

Vendorproxy

CalendarMonitoring

Public Interface

Control/Management plane or Provisioning system

Vendorproxy

Domain-specific proxy

Connect. Communicate. CollaborateAutoBAHN experiences

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DCN d

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Europ

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DCN d

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GEANT2 Workshop June 2007 Demonstration

• Three domains are involved:– GRNET and HEAnet

interconnected through GEANT2 links

• AutoBAHN is in prototype phase– IDM functionality is near

completed– DM functionality is emulated



• The system assumes that it has full control over network resources within domain

• Domains are able to exchange abstracted resources view• Inter-domain pathfinder enables searching for available

resources within AutoBAHN cloud (local domain search was pre-defined manually and fixed)

• Reservations can be set for future execution (advance reservation feature)

• Single reservation requests are grouped under service instance



Lithuania

Albania

Austria

Bulgaria

Croatia

Cyprus

Czech Republic

Finland

France

Germany

Italy

Hungary

Latvia

FYROM

Norway

Poland

Serbia

Slovakia

Slovenia

Spain

Sweden

Switzerland

Turkey

Ukraine

United Kingdom

Denmark

Portugal

Bosnia & Herzegovina

Belgium

Netherlands

Estonia

Belarus

Romania

Moldova

Luxembourg

Montenegro

HEAnet- managed by BLUENet tool- automatic MPLS network provisioning

GRNET- managed by ASNTool- automatic Ethernet network provisioning

GEANT2/DANTE- managed by Alcatel NMS - automatic SDH network provisioning

Calendar module allows to schedule reservations in advance



• The live demonstrations of AutoBAHN have sped up the development process providing feedback to the development.

• It opens NRENs for cooperation, so that important input of requirements and suggestions could be taken into consideration

• The number of NRENs involved in test and demonstration environment is increased

• More NRENs declares its interest to join the AutoBAHN cloud• Reservation time can not be easily estimated. The highest delay is

introduced by Alcatel NMS and associated domain resource management tool (up to 4 minutes).



• Lessons learned– The DM implementation is strongly dependant on local

domain network management model and procedures– The DM needs to be extended with dedicated tools to

collaborate with existing management applications used within domains

– Exceptional situations were encountered during testing, and preventing/reacting actions must be defined and implemented

– Network configuration time depends on domain technology and capabilities (e.g. NMS efficiency) and must not be ignored



Local Mgmt tools NMS Policy Local Mgmt tools NMS Policy


Jun

20

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No

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Jan

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Apr

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8

4th G

N2 W

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hop

–

AutoB

AHN pro

toty

pe d

emo

SC’07

– 1

st Aut

oBAHN &

DCN d

emo

5th G

N2 W

orks

hop

– Fu

lly o

pera

ble

Europ

ean

AuoBAHN d

emo

Inte

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2 Spr

ing

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ting

– Fu

lly

oper

able

Aut

oBAHN &

DCN d

emo


SuperComputing’07 demonstration

• On November 2007 AutoBAHN is presented on SuperComputing’07 event

• European test environment is interconnected with USA part• Dedicated IDC protocol is defined and implemented to

assure interoperability of AutoBAHN and DCN systems



• 4 European domains involved

• Attempt to collaborate with alternative system

• Attempt to automatically connect two continents

• Phoebus infrastructure deployment

• Cyclic durability test



• IDM is improved and enhanced with IDC capability• DM is implemented and enable control of network

resources (with assist of domain dedicated tools)• Deployment of domain resource management tools in all

involved NRENs in Europe – GRNET, HEAnet, and PSNC/PIONIER, DANTE/GEANT2

• The interoperability with ESNet and Internet2 clouds is enabled

• Phoebus infrastructure is deployed as a client for BoD systems



• IDC protocol– Defined by AutoBAHN and DCN team to enable

interoperability of BoD systems– Web Services based messages exchange– Contains:

• Topology exchange details• Reservation related requests/responses

– Scheduling

– Signalling



• IDC protocol – Topology elements– Minimal set of toplogy exchange elements

• Domains• Nodes• Ports• Links

– Domain privacy and policy• Only the abstracted topologies are available

to public and is exchanged between systems

• Real data (interface names, etc.) may be hidden or missing depending on abstraction level and policy



`

Switch1 Eth1.1

10.0.0.1 10.0.1.1

Eth1.1

urn:ogf:network:domain=net1:node=city.switch1:port=eth1.1

DCN

Switch1

urn:ogf:network:domain=net1:node=10.0.0.1:port=10.0.1.1


• IDC protocol – Path definitions


SRC

DST

SRC

DST

SRC

DST

SRC and DST points only

SRC and DST with some intermediate points

All points on the path



• Synchronous vs. Asynchronous communication model for inter-domain connections– AutoBAHN implements asynchronous communication as

communication delays and resource processing can not be arbitrary defined

– DCN implements synchronous communication, which leaded to waiting for request responses between Europe and USA

– The reservation time in Europe requires all resources to be configured and put into operational state, which may take up to 4 minutes.

– DCN may consider timeouts and reservation failures if response waiting periods were defined too short.


Jun

20

07

No

v 2

007

Jan

20

08

Apr

200

8

4th G

N2 W

orks

hop

–

AutoB

AHN pro

toty

pe d

emo

SC’07

– 1

st Aut

oBAHN &

DCN d

emo

5th G

N2 W

orks

hop

– Fu

lly o

pera

ble

Europ

ean

AuoBAHN d

emo

Inte

rnet

2 Spr

ing

Mee

ting

– Fu

lly

oper

able

Aut

oBAHN &

DCN d

emo


Demonstration on GEANT2 Workshop January 2008

• Multiple parallel connections between end points was supported by data plane

• Domains resource management is fully automated and performed without administrator attention


Demonstration on GEANT2 Workshop January 2008

Lithuania

Albania

Austria

Bulgaria

Croatia

Cyprus

Czech Republic

Finland

France

Germany

Italy

Hungary

Latvia

FYROM

Norway

Serbia

Slovakia

Slovenia

Spain

Sweden

Switzerland

Turkey

Ukraine

United Kingdom

Denmark

Portugal

Bosnia & Herzegovina

Belgium

Netherlands

Estonia

Belarus

Romania

Moldova

Luxembourg

Montenegro

HEAnet- BLUENet for MPLS provisioning

PIONIER- Automated MPLS provisioning

GRNET- ASNTool for VLANs proviosioning

GEANT2- Alcatel NMS for SDH provisioning


GEANT2 Workshop Jan’08 Lessons learnt

AdminPolicy

MPLS /GMPLS

• Domains are not keen to show too much details of their topology. In some cases it should be limited just to domain edge points (Ingress/egress points and links to clients)

• MPLS domains topology is seen as a cloud, and limited management capabilities are supported through available NMS’



• Alcatel NMS do not allow easily to control the resources at very low level

• Issues with usage of local NMS pathfinding for advance reservation (pathfinding is done with current state, as no calendar is available)

NMS

A B C D

A C

B

D



• That leads to modification of initial AutoBAHN assumption of having explicit and full control over network resources– Domains may be represented in very simplified way

(abstraction process), even as a single node– NMS may be considered to have „unlimited” resources

and control resources basing more on policy, rather than tracking network status

– Abstraction process should be modified and new methods of resource management at DM level must be introduced


Jun

20

07

No

v 2

007

Jan

20

08

Apr

200

8

4th G

N2 W

orks

hop

–

AutoB

AHN pro

toty

pe d

emo

SC’07

– 1

st Aut

oBAHN &

DCN d

emo

5th G

N2 W

orks

hop

– Fu

lly o

pera

ble

Europ

ean

AuoBAHN d

emo

Inte

rnet

2 Spr

ing

Mee

ting

– Fu

lly

oper

able

Aut

oBAHN &

DCN d

emo


Internet2 Spring Meeting 2008 demonstration



Lithuania

Albania

Austria

Bulgaria

Cyprus

Finland

France

Germany

Italy

Hungary

Latvia

FYROM

Norway

Serbia

Slovakia

Spain

Sweden

Switzerland

Turkey

Ukraine

United Kingdom

Denmark

Portugal

Belgium

Netherlands

Estonia

Belarus

Romania

Moldova

Luxembourg

Montenegro

GEANT2

HEAnetPIONIER

CESNET

CARNET

GRNET

GARR

Link to NY



• IDC protocol improvements in features and stability• Hazard situations are limited and IDM/DM stack handles

most failure situations• Phoebus infrastructure is used to request circuits and

generate traffic• QinQ support due to Phoebus requirements• Constant, long term durability testing on automated circuit

set up and tear down• 7 domains involved on European site: CARNet , CESNET,

GARR, GEANT2, GRNET, HEAnet, PIONIER


Internet2 Spring Meeting 2008 demonstration – Lessons Learnt

• Reservation states incompatibility – SCHEDULED state is missing in DCN design.

• New features are requested for IDC functionality– Modify reservation– Find possible reservation time

Connect. Communicate. CollaborateThe AutoBAHN team


Global On-demand Light Paths – Developing a Global Control Plane

Thank you

Please visit: http://www.geant2.net/autobahn

Connect. Communicate. Collaborate Global On-demand Light Paths – Developing a Global Control Plane...

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