Bandwidth on Demand
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description
Bandwidth on Demand. Dave Wilson DW238-RIPE [email protected]. Agenda. NBE and the Blue Network G EANT2+ and European cooperation How to use these services and what it means for our networks. National Backbone Extension. The Blue Network. Evolution of the network. - PowerPoint PPT Presentation
Transcript of Bandwidth on Demand
Agenda
• NBE and the Blue Network
• GEANT2+ and European cooperation
• How to use these services– and what it means for our networks
National Backbone Extension
The BlueBlue Network
Evolution of the network
• NRENs, and Campus Networks, have conflicting requirements– Reliable internet access– High bandwidth applications– Secure network access– Experimental and research traffic
• Our approach has evolved over time
Evolution of the network
1994-1999Star topology
Centered in Dublin
IP over X.21 serial,good up to N*2meg
UCG UCD
HEA NCIR
Forbairt
VCIL
MCI
Ebone
DIT
TCD
National Backbone
2001-2006
Bring the networkto the largest cities
Greater equalityof access
Customers
External peers and upstreams
National Backbone Extension
2006 onward
Bring networkto the end site
Ethernet services,IP network is onemore "user"
Digital DepotMLE
DITGrangegorman
Wood Quay
Bolton St
DITAungier St
UCD EarlsfortTerrace
Eccles St
Mater Dei
RTE
UCD
FostersPlaceBeaumont
D’Olier St EnterpriseCentre
RCSI
St.Vincent’s
TallaghtHospital IT Tallaght
Carrickmines
Finglas
Site complete
Site in progress
Site planned
Number of circlesindicates number of
diverse physical routes
ESBT fibreNTL fibre DCC fibre
BT
TCD
DIASFenian St
Kildare HouseRIA
DCU
Brooklawn House
Kilcarbery Park
Esat-X
Carysfort
HEAnet national fibre network
Carrick-on-Shannon
Galway
Drumline
Killonan
Stradbally
Kilbarry
Killoteran
E-net fibre
NUI Galway
UL
UCC
LetterkennyIT
Beaumont
IT Blanchardstown
St. Pat's
Crumlin Hospital
St. J ames
Dundalk IT
Servecentric
NCI
George'sDock
IT Sligo
E-netLetterkenny
Mullagharlin
DIASBurlington Rd
NewmanHouseGMIT
Limerick IT
CIT Tony RyanAcademy
An Cheim
BIP Interconnect
Provider not yet known
UL OutreachCentre
College St.
Sligo
Waterford IT
CSCNUI Galway
ESBTCitywest
IT Tralee
Athlone IT
Carriganore
IT Carlow
DLIADT
Digital DepotMLE
DITGrangegorman
Wood Quay
Bolton St
DITAungier St
UCD EarlsfortTerrace
Eccles St
Mater Dei
RTE
UCD
FostersPlaceBeaumont
D’Olier St EnterpriseCentre
RCSI
St.Vincent’s
TallaghtHospital IT Tallaght
Carrickmines
Finglas
Site complete
Site in progress
Site planned
Number of circlesindicates number of
diverse physical routes
ESBT fibreNTL fibre DCC fibre
BT
TCD
DIASFenian St
Kildare HouseRIA
DCU
Brooklawn House
Kilcarbery Park
Esat-X
Carysfort
HEAnet national fibre network
Carrick-on-Shannon
Galway
Drumline
Killonan
Stradbally
Kilbarry
Killoteran
E-net fibre
NUI Galway
UL
UCC
LetterkennyIT
Beaumont
IT Blanchardstown
St. Pat's
Crumlin Hospital
St. J ames
Dundalk IT
Servecentric
NCI
George'sDock
IT Sligo
E-netLetterkenny
Mullagharlin
DIASBurlington Rd
NewmanHouseGMIT
Limerick IT
CIT Tony RyanAcademy
An Cheim
BIP Interconnect
Provider not yet known
UL OutreachCentre
College St.
Sligo
Waterford IT
CSCNUI Galway
ESBTCitywest
IT Tralee
Athlone IT
Carriganore
IT Carlow
DLIADT
National Backbone Extension
So the IP ("redred") network canfollow any logical layout
Customers may makeconnections to any location- their own sites or others
...on the blueblue network
GEANT2 and JRA3
The European Connection
European Bandwidth on Demand
• NRENs everywhere are working on providing layer 2 services
• These meet up with GEANT2, which provides its own
• JRA3 plans to tie these all together
European Bandwidth on Demand
• So the NREN will be able to create layer 2 ethernet links between arbitrary locations
• JRA3's system will process requests and arrage setup of end-to-end paths
• Users will have the possibility to connect to "anywhere" in Europe - on layer 2...
European Bandwidth on Demand
• Benefits? Gets the high-demand users off the routed IP network...
• Tune the IP network toward less conflicting goals...
• Gives the user more control...
Using these services
Campus networks...
•Every campus is different– Security needs– Regular web/email needs– Research networking needs–"Home" user (campus accommodation)
•These are conflicting requirements– Ask any CERT
•Each IT dept reaches its own conclusions
Hierarchy is assumed
Conflict of interest
•The technology exists to connect arbitrary LANs across Europe. Great!
•The addressing assumes the old hierarchy
•Addressing isn't as flexible as GE circuits
The solutions
The tradeoffs
•Follows the rules
•Easy for user to deploy
•Easy for operator to support
•Flexible to existing networks
Solution #1
•Get an AS number and PI space
–Renumber the networks–Run BGP within the campus, and to the NREN
Solution #1
•Get an AS number and PI space
–Doesn't fit with the on-demand idea–Requires complex IP and BGP expertise–Doesn't exist for IPv6 (at the moment anyway, interesting implications from RIPE meetings)–Everyone hates renumbering
Follows rules Easy deploy Easy support Flexible
Solution #2
•Use RFC1918 space
–Renumber the networks–Proxies/NATs for outside access
Solution #2
•Use RFC1918 space
–Networks might not be fully connected–Removes any hope of connecting directly to rest of the internet–Everyone hates renumbering
Follows rules Easy deploy Easy support Flexible
Solution #3
•Use existing numbers and hope it works
–Directly connect the networks–Static more-specific route on the hoststoward the remote site
Solution #3
•Use existing numbers and hope it works
–May bridge campus networks,and all the security hilarity that that entails–Difficult to manage, traffic could go the "wrong" way and be blocked or cause trouble–Breaks conditions for IP allocation, so there may be unexpected side effects
Follows rules Easy deploy Easy support Flexible
Solution #4
•Subnet, route the subnet
–Renumber networks if necessary–Configure routing (not necessarily dynamic) within the campus–Route the more-specific subnet to the remote site over the BoD connection
Solution #4
•Subnet, route the subnet
– Breaks conditions for IP allocation, so there may be unexpected side effects – Still requires some routing knowledge– Difficult to enforce backup via regular IP network
Follows rules Easy deploy Easy support Flexible
Other possibilities
•IPv6 gives us a much freer hand–Multiple addresses per interface–Source Address Selection based on application
•Combine with .1q VLANs–Host chooses which LAN to send traffic one–Requires host to have intelligent routing–Could in principle work for IPv4
To try to reach a common solution...
•How do you plan/expect BoD to be used?–Is it all intra-institution? (e.g. site links)–End users connecting to other institutions?
•Any other solutions I haven't thought of?
