An Investigation into Transport Protocols and Data Transport ...

C.3. DataTAG 291
Cisco 7606
Cisco 7606
Manchester PCs
Cisco 7606
Manchester
Cisco 12000 Cisco 12000
Cisco 7606
London
UCL PCs
2.5Gb/sec
1Gb/sec
(a) MB-NG Testbed
Figure C.2: Logical representation of the MB-NG Testbeds.
Manchester Computing Centre in Manchester and Rutherford Apple Laboratory
in Warrington. For this investigation, is was sufficient to test along
only the London to Manchester parts of the MB-NG network. The three
end-points are connected via three Cisco 12000 GSR backbone routers. Each
site has two Cisco 7600 in which 3 high-end PCs were directed connected
onto. A physical bottleneck of 1Gb/sec was provided by a single 1Gb/sec
fibre between the two Cisco 7600 co-located at each site.
C.3 DataTAG
DataTAG is composed of a leased fibre connecting CERN in Switzerland to
StarLight in Chicago, United States of America. The infrastructure of the
DataTAG testbed consists of two Juniper T320 which aggregate the traffic
at either sites onto a dedicated STM64 link across the Atlantic Ocean. The
traffic from the testbed PCs are connected through Cisco 7600 series routers
which are connected to the Juniper T320’s at either side of the DataTAG
network. As the testbed PCs are limited by their 1Gb/sec NICs, the testbed
was configured to provide a bottleneck capacity of 1Gb/sec through a virtual