Transcript SILK-UCL - UCL Computer Science

The Silk Project
Network Group Seminar
Agenda
Overview of Silk
Current Status
Extending the Silk System
IPv6 over satellite in Silk
The longer Term Perspective
Silk O/v – Background
In 2001, NATO Networking Panel
agreed installation of Regional
Network for NISs of the Southern
Caucasus and Central Asia
Would connect existing NRENs
into GEANT
Start with own resources – $2.5 M
for 3 yrs
Allow to be extensible by others
Silk O/v – Countries and Sites
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Silk O/v – Basic Technology
VSAT Technology
DVB Shared Channel from hub, uses IPv4/DVB
encoder at the DESY Hub
Has IPv4/DVB decoder at remotes
Uses Eurasiasat strapped beam transponder
Return link via Single Channel per Carrier
from Remotes, uses Cisco router plus
SCPC modem
Hub in Hamburg with 5.6m dish
Remotes in 8 NISs with 2.4 or 3.8 m dishes
Routers and Silk NOC part of Silk Network
Thinking the future
Silk O/v - West Beam Transponder Map
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Thinking the future
Silk O/v – East Beam Transponder Map
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Silk O/v – Schematic of the Silk System
Silk O/v - Dish at Each Remote Site
Silk O/v – Architectural Overview
Hub Earth Station at DESY accesses
European NRENs and Internet via GEANT
Provides direct International Internet access
National Earth Station at each Partner site
Operated by DESY
Provides Internet access via satellite
Additional earth stations from other sources
Routers for each Partner site
Linked on one side to the Satellite Channel
On the other side to the NREN
Silk O/v– Equipment at Each Site
Kalitel-supplied, NATO financed, central
hub and VSATs – 5.6m hub, 2.4 - 3.8m rem
Cisco-supplied and financed LAN items
A 7204 Router and 3524 Switch with 24 I/Fs
A CE 560 Content Engine with 155 GB of disc
as a Web Cache
Aim was to provide from NATO resources
to 750 Kbps up-link per NIS, shared 18
Mbps down-link
Silk O/v– IPv4 Hub Site Schematic
Silk NETWORK
IPv4/DVB ENCAP
SCPC
IPv4 Silk ROUTER
CONTENT
CACHE
Silk HUB
(IPv4 only)
NREN
NREN
ROUTER(S)
Silk O/v – IPv4 Remote Site Schematic
Silk NETWORK
SCPC
IPv4/DVB DECAP
IPv4 Silk ROUTER
REMOTE SITE
(IPv4 only)
NREN
CONTENT
CACHE
NREN
ROUTER(S)
Silk O/v – Early Planned Silk Bandwidth
Planned Silk total bandwidth from NATO
Per half year
Total bandwidth in
Mbps
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25
20
15
10
5
0
02/H2
03/H1 03/H2
04/H1 04/H2 05/H1
Agenda
Overview of Silk
Current Status
Extending the Silk System
IPv6 over satellite in Silk
The longer Term Perspective
Thinking the future
Status - Current Status
All original 8 sites operational
Most equipment OK, some BUCs have
trouble reaching 1.5 Mbps SCPC
After allowing for FEC and DVB O/h, we
achieve 1.65/1.2 bits/Hz in DVB/SCPC
We are currently operating with 12 MHz;
we expect to reach 15 MHz shortly
Currently 17.4 Mbps DVB, 4.4 Mbps transmit
The caches currently save about 10% B/w
Caches only store pages own E/s requests
Have implemented CIR quotas
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Thinking the future
Status - Governance
Have set up Silk Board (SB)
Seven who manage Silk activities, plus one
representative each Silk country
Set up Silk Executive Committee (ExCo)
Six manage Silk activities, plus one from
each region
SB meets 3 x per year, 2 in Silk countries
Eurasiasat has hosted two in Turkey also
ExCo has 2 Teleconferences per month
SB has also invited guests
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Thinking the future
Status – SPONGE
All NATO money must be spent on
Partner countries – not Western staff
Silk must be managed. EC funding first
project – SPONGE- to manage Silk
Partners UCL, Groningen, ARENA, GRENA
Four Work-packages
Management, Dissemination, Measurement
and Optimisation, personal communication
Chair Silk Board, Silk ExCo, run Silk
Web site, watch over Silk NOC
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Thinking the future
Status – Co-funding
NATO has put in $2.7M
EC funds SPONGE management at $220K
DESY houses hub and runs NOC at $400K
Cisco Donation now worth $550K
ISOC donations for workshops - $120K
Have held one so far, but sent people to CEENET one
NSRC donations for books/WLAN - $50K
IREX is putting in – $30K
Soros/Eurasiasat travel - $30K
Many are funding projects that build up national
infrastructure using Silk
Soros, EC Tacsis, UNDP, World Bank
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Thinking the future
Status – Received Traffic Q1-04
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Thinking the future
Status – Received Traffic Q1-04
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Thinking the future
Status – Personal Communications
Have provided 2 Cisco phones per site
UCL operates voice server
UCL has put dial-out on server to very
limited outside lines
Used regularly for ExCo meetings
Have done extensive H.323 usage
Included Heads of State and NATO SecGen
Distance lectures including World Bank
Requires using CIR in both directions
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Agenda
Overview of Silk
Current Status
Extending the Silk System
IPv6 over satellite in Silk
The longer Term Perspective
Extending Silk – Possibilities
Have started talking to other funding
agencies to provide extension
Could be just extra national bandwidth
Could be extra VSATs – now adding Kabul
Could be Receive-only earth stations
Could be extra networks on Silk routers
Could be alternate activity like IPv6
Early discussions look promising
IREX and Soros will provide funds
University of Central Asia will use it via
funds from Aga Khan.
Thinking the future
Extending Silk – Workshops
Will do four workshops – mainly in
Russian
Mainly from ISOC funds, one co-funded
ANW from NATO and CEENET
Security – Armenia, June
Wireless – Hungary, August
Distance Education - Azerbaijan, September
IPv6 - Hamburg, September
DNS, Registration, address allocation Kazakhstan, November
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Agenda
Overview of Silk
Current Status
Extending the Silk System
IPv6 over satellite in Silk
The longer Term Perspective
Thinking the future
IPv6 Activities – Background
Countries expressed interest in getting
experience – but not at cost of IP4 service
Fairly easy to do with dual-stack router
and tunnelled IPv6
Native IPv6 needs special hardware for DVB
ESA/IABG wanted to test IPv6/DVB H/w
Will provide boards and some B/w
EC agreed that 6NET could support
dissemination to Silk Project
Some B/w if there is an iPv6 workshop
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IPv6 Activities – Overview
Today‘s DVB-S encapsulator use mainly
MPE, which does not support IPv6
Many satellite links are uni-directional
Link-layer multicast not always supported
Management systems are often
proprietary and support only IPv4
Other proprietary components (e.g. PEP)
do not support IPv6
All those are investigated within an ESA
IPv6 study
IPv6 Activities - Key Transition issues
Satellite
IPv4
IPv6
DVB
demodulator
DVB
modulator
IPv6
Network 1
network
R1
IP->DVB
DVB->IP
Serial Int
Serial Int R2
SCPC
modem
SCPC
modem
IPv6
IPv6
Network
network 2
IPv6 Activities – Two basic solutions
Use of IPv6 tunneling
Could be done with existing DVB-S
equipment
Use of Ethernet bridging or IPv6 over
IPv4 tunnel
Will be done by Silk project
Integration of native IPv6
Use new DVB-S equipment based on ULE
Will be provided to Silk by ESA / IABG
IPv6 Activities - IPv6 provisions to Silk
Propose to upgrade routers to IPv6
Specific routers have worse performance, but
this is no problem at Silk speeds
ESA/IABG will provide one DVB-S
encapsulating router and five
decapsulating PC cards
ESA/IABG provide extra bandwidth
Use for 2 MHz IPv6/DVB common channel
Use for 5 x 120 KHz IPv6/SCPC transmit
channel
CEC (6NET) will provide extra bandwidth
Use for 5 x 64 KHz IPv6/SCPC transmit channel
IPv6 Activities– Hub Enhancements
Silk NETWORK
IPv4 ENCAP
IPv6 ENCAP
SCPC
Silk ROUTER
(DUAL STACK)
CONTENT
CACHE
Silk HUB (DUAL
STACK)
NREN
NREN
ROUTER(S)
IPv6 Activities– Remote Site Enhancements
Silk NETWORK
IPv4 DECAP
IPv6 DECAP
SCPC
Silk ROUTER
(DUAL STACK)
CONTENT
CACHE
REMOTE SITE
(DUAL STACK)
NREN
NREN
ROUTER(S)
Agenda
Overview of Silk
Current Status
Extending the Silk System
IPv6 over satellite in Silk
The longer Term Perspective
Thinking the future
Longer Term – Future Steps
NATO will probably continue after 7/05
But at a reduced rate with declining funding
Co-funding is vital to many others also
Hard to achieve with these countries
Form of Connectivity will become hybrid
Satellite necessary for some locations
Fibre will come into some sites; already
looking at terrestrial possibilities
Other satellites cheaper than this Silk
solution – particularly in Caucasus
May have to move hub to sit on single beam
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Thinking the future
Longer Term – Future Steps -2
Most terrestrial solutions go through Russia and
perhaps Kazakhstan
Will become cheaper, but acceptable politicially?
EC starting specific Caucasus Programme
Perhaps Caucasus connects by fibre to GEANT, some
others stay satellite
Will discuss Central Asia plans with APAN
Perhaps there will be links to Pacific Rim
Should use satellite broadcast capability
Both Multicast and Broadcast caching
Will make proposal to NATO Science Committee
in October, and also to EC (not only IST)
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Thinking the future
This may not be high science, but it is
a fascinating project with very high
visibility – and it is fun
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More information - Links
Silk project
http://www.silkproject.org
ESA IP over DVB project
http://telecom.esa.int/telecom/www/object/i
ndex.cfm?fobjectid=11271