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HEAnet Conference 2010 11.11.2010
Radek Krzywania, PSNC, [email protected]
Marco Ruffini, CTVR, TCD, [email protected]
Victor Reijs, HEAnet, [email protected]
FEDERICA:
Virtual e-infrastructure for Researchers
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What is FEDERICA about
FEDERICA delivers individual virtual networks (slices) to the end users, utilizing pan-European dedicated infrastructure
The FEDERICA infrastructure is devoted to research on the Internet of the Future and on virtual distributed systems.
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Physical Network Topology
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• 14 PoPs with 25 virtualisation servers • 1GbE connections via GÉANT network • 4 Juniper MX 480 routers 40x1GbE • 10 Juniper EX 3200 24x1GbE • 2 Juniper EX 4200 24x1GbE
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Virtualisation capabilities Server Virtualisation
Each PoP has between 1 and 4 powerful SUN X2200 M2 virtualisation servers with VMware on board
8 x 1 GbE interfaces can be used by virtual machines, where multiple virtual interfaces can be hosted
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Virtualisation capabilities Router Virtualisation
4 core PoPs use MX480 for routers virtualisation
Each router can operate up to 16 virtual, fully functional Juniper routers, managed by users inside slices
In addition logical routers (e.g. Quagga) can be also run on virtual servers
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Virtualisation capabilities Connections Virtualisation
Within 1GbE channels delivered by GÉANT infrastructure, the virtual slice links can be delivered between PoPs with: VLANs configuration MPLS LSPs
configuration VMware vSwitch
interfaces configuration
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FEDERICA slice overview
5 internal project-slices infrastructure monitoring equipment testing prototype validation
8 external user-slices control plane scalability slice isolation slice interconnection virtual resource monitoring multi-stage routing (CTVR
)… 3 user-slices in the loop
seamless mobility (TSSG)
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CTVR optical circuit switching test
" Testing dynamic switching from IP to wavelength channels
" Possible issues are packet loss and out of order arrival
" Tested both on optical switch, and on FEDERICA slice
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Testing topologies
" Optical Lab
" FEDERICA slice
RTT = 87ms
RTT = 40ms
FEDERICA slice
CTVR optical Lab
HEAnet links
TCD ISS/CS network
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Tests " With no congestion, using TCP Reno, no impairments
are noticeable
" Congestion in Forward path:
Out of order does not affect transmission because rate is already down to a minimum
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" Congestion in both directions
" Both suggest that wavelength switching on the data path does not improve results if the reverse path is also congested
" Switching impairments are not noticeable in FEDERICA tests due to low data rate caused by longer RTT times
Tests
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Conclusions
" Optical switching affects TCP (Reno) transmission if congestion occurs on both directions " Wavelength switching on data path does not bring improvements " Transitory effects are more dramatic for fast (short-RTT) networks (data rate
closer to out of order arrival threshold)
" Benefits of FEDERICA virtualized infrastructure: " Recreates more realistic scenario, using commercial routers and links " Can be used either as a stand-alone service or else as an extension of
existing testbed " Internet connectivity could be used to create more interesting traffic
scenarios " Virtualisation allows building relatively large topologies
" Issues of FEDERICA virtualized infrastructure : " The RTT cannot be changed easily, only through re-route
" Requires intervention from FEDERICA NOC " Cannot be arbitrarily chosen
" In some cases virtual machines can influence each other if running in same physical server
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A plug for the possible FEDERICAII
Development of the Internet of the Future will continue So a continuation of FEDERICA is being investigated:
FEDERICAII If you or your users want to do Internet related
research (on network protocols, procedures, new applications, etc.) on this test bed, please support FEDERICAII proposal
More information can be gotten from presenters
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Thank you for attention
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