Circuit Reservation
Clive Davenhall
ESLEA Technical Collaboration Meeting
20-21 June 2006
ESLEA Technical Collaboration Meeting, June 2006.
Slide 1
ESLEA Circuit Reservation
• Currently in ESLEA/UKLight:
- quasi-permanent static circuits are established by hand,
• the aim of the circuit reservation work is to:
develop a system that allows circuits to be set up automatically,
• The user reserves a system beforehand,
- it is then subsequently set up at the specified time,
• twofold aims:
- develop a system that exploitation projects can use,
- demonstrate the sort of system that could be deployed more
widely.
ESLEA Technical Collaboration Meeting, June 2006.
Slide 2
The ESLEA Network
• provide switching on ‘the ESLEA network’,
• the core is part of UKLight,
• provides connections between the partner institutions
- and to collaborators overseas,
• currently provided as quasi-permanent static circuits,
• place Cisco 7609s around the edge of the UKLight access points.
ESLEA Technical Collaboration Meeting, June 2006.
Slide 3
Topology of the ESLEA Network
ESLEA Technical Collaboration Meeting, June 2006.
Slide 4
Topology of the extended ESLEA Network
ESLEA Technical Collaboration Meeting, June 2006.
Slide 5
Circuit Reservation Software
• Phase I: configure the edge Cisco 7609s,
• Phase II: control of the simulated core switch,
• the main component is a reservation-based system,
- user specifies the circuit in advance,
• not written from scratch,
- modification of the NRS system developed by Saleem Bhatti et al.
of UCL (now at St Andrews),
• written in Java.
ESLEA Technical Collaboration Meeting, June 2006.
Slide 6
NRS Architecture
ESLEA Technical Collaboration Meeting, June 2006.
Slide 7
EGEE BAR
• Phase II: includes simulated core switch,
• using a modified version of the BAR software,
• developed by EPCC as part of EGEE project,
- Kostas Kavoussanakis, Charaka Palansuriya, Florian Scharinger
- and a no. of external collaborators, including DANTE,
• again developed for QoS over conventional networks,
• uses agreed standard interfaces,
• written in Java,
- components communicate using Web services,
• re-use NRS as one of the components (L-NSAP).
ESLEA Technical Collaboration Meeting, June 2006.
Slide 8
BAR Architecture
ESLEA Technical Collaboration Meeting, June 2006.
Slide 9
Status and Plans
• Currently working on Phase II
- running several weeks behind schedule,
• aim to have pilot deployments with VLBI and ReG,
• aim to drive the reservation from ReG’s co-scheduler,
- actively working with them to ensure that this can be done.
ESLEA Technical Collaboration Meeting, June 2006.
Slide 10
Contact Information
Clive Davenhall
National e-Science Centre,
15, South College Street, Edinburgh, EH8 9AA
clive@nesc.ac.uk
ESLEA Technical Collaboration Meeting, June 2006.
Slide 11