1. Overview of 4Gbps connectivity for Nordic-MERLIN fringe tests
John Conway, EXPReS Progress meeting, Utrecht,
Jan 29th, 2008

2. Overview Fringe test at 1.3cm using Onsala 20m – Jodrell
eMERLIN correlator autumn 2008
Jodrell-Metsahovi to do digital electronics firmware – Onsala to provision link for 4Gbps test to eMERLIN, main deliverable fringes
Positive response on LOFAR station funding, build in 2008 need general LOFAR/eVLBI solution
Simon Casey has joined us from 1st Jan paid by EXPReS/FABRIC

3. Hardware 1 iBoB and 1 iADC delivered November, woken up.
Ordered HP switch (HP6400cl, 6 xCX4 ports plus 2 optical ports) same as Metsahovi) - allow CX4 conversion into Ciena box and multiple devices connected. Delivery next week.
Also can borrow Jb CX4-10G converter as backup (but may need LR-XFP).

4. Chalmers
Multi mode digital
20m
Analog over fibre
Single mode digital
10G lightpath
1G General traffic
1G switched VLBI
Coax
iADC
VLBI’
Mk5
New
Offices
iBoB
25m
CX4
HP6400cl
Switch
Ciena
LR-10G
LR-10G
CX4
LOFAR
PC+10G card
Onsala Local Network plan
November 2007
General Obs traffic

5. Discussions with SUNET/NORDUnet
F2F Meeting end of October in Copenhagen, successful, discuss lightpaths, switched and ‘switched lightpaths’
10G lighpath equipment installed at Onsala and Chalmers first week of November, send signals over our dark fibre to Gothenburg then over academic networks. Equipment supplied by SUNET, no cost to us while in test phase.
Set up test from PC in Stockholm over NORDUnet and GEANT2 provisioned lightpath to UK. PC delivered from R Hughes-Jones before Christmas.
Second meeting Stockholm 15th January 2008, decide to work toward ‘final solution’ to allow both EXPReS needs and Onsala LOFAR needs. .

6. Proposal after the meeting 2008-01-15
FUNET
Rest of
FUNET
SUNET
Rest of
SUNET ??
NORDUnet routed IP
(simplified view)
SUNET project router
Onsala
Metsähovi
NORDUnet TSS Opto
NetNorthWest
STO
CSC
Probably to Hamburg on NORDUnet and Surfnet cross border link
Jodrell Bank
TSS L2 Cloud
AMS
JANET
CPH
VLANs
GÉANT2
SurfNET
LOFAR etc.

7. Implementation plan Feb 15th Feb 22nd Feb 29 th Feb 1 st Feb 1st
Number
Description
Owner
Deadline
Comment 1
Finalise PC test between UK-Stockholm.
(using test PC in Stockholm)
John Conway/Simon Casey
Week 5
Feb 1st 2
Prepare TSS set-up and test it
(again to UK using test PC in Stockholm)
Alberto Colmenero
Week 7
Feb 15th 3
Move test PC to Onsala and test connection Onsala-UK. Patch cable
used in Stockholm
Week 8
Feb 22nd 4
Install MX4800 in Stockholm
Magnus 5
Test connection Onsala-UK on final set-up.
Week 9
Feb 29 th 6
Investigate if Metsahovi is able to get an interface for their switch to connect to NORDUnet.
Roy Molini
Week 4/5
Feb 1 st

8. Test schedule/Timeline
Envision PC (Onsala) to PC (UK, London or Jodrell), by end of Feb.
UK Destination depends on JB 10G timeline. Recent progress on provisioning cross UK connectivity.
Then iBob to PC, iBOB to iBOB tests, Onsala-Jodrell and also Onsala –Metsahovi
Work needed on ensuring accurate timing info gets on packets.
Once new NORDUnet infrastructure in place (early March), can do tests at 1024Mbit/s to JIVE correlator over our 10G ‘routed lightpath’ via Amsterdam.
Above important for Onsala for pioneering LOFAR lightpath connectivity to Groningen.
Final timeframe for 4Gbps FABRIC fringe tests depends on delivery of eMERLIN correlator – and progress at ‘receive end’