Transcript 0702_TNLC_-_AMPS_Status - Indico

Connect. Communicate. Collaborate
AMPS & PIP Status
Toby Rodwell DANTE
TNLC
CERN, 21 February 2007
Background - SEQUIN
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• Service Quality across Independent Networks (SEQUIN)
– Nov 00 to Apr 02; 6 NRENs + DANTE
• SEQUIN’s findings: to ensure an uncongested IP path, (i.e.
emulate a point-to-point circuit)
– Premium IP (PIP) traffic must be prioritised over nonpremium traffic (e.g. using DiffServ)
– PIP must be policed to avoid mutual congestion caused
by parallel premium flows
• Concession – if a network is “over provisioned”, then no
policing (or prioritization) is required
Background – GÉANT
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• Based on SEQUIN findings, GÉANT Provisioning System
developed in May 2003, and operational later that year
• Basic operation
– Users requested, via web-based form, a Premium IP
service between two edge points of the GÉANT network
– Prov Sys calculated routed path between edge points
(using cached topology model)
– If spare capacity existed for new reservation, then
request accepted
– Prov Sys drafted router configuration (firewall filters) and
e-mailed GÉANT NOC for action
AMPS (i)
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• Advance Multi-domain Provisioning System
• Closely based on original Prov Sys
• Reservations not “on demand” but made in advance (2-90
days)
– Path based on expected network topology, not actual
current topology
– Admission control decision made by AMPS – not routers
• Incompatible with “on demand” premium provisioning e.g.
MPLS-TE
AMPS (ii)
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• To ensure scalability, AMPS is distributed
– One system per participating network
– Each system peers with just its neighbours
• Policy Module allows AMPS administrator to control who
can reserve what
– Normally by group membership
– ‘Default’ group used if none specified in request
– For GÉANT2 Default group anyway used; policy is
currently “first come, first served”
AMPS Operation
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e2e Path X-Y
Domain B
Domain A
Domain C
AMPS B
Point X
AMPS C
AMPS A
User
Point Y
Current PIP/AMPS Status
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• PIP/AMPS only available in GÉANT2
• GRNET offers PIP via ANS
– AMPS/ANS tests conducted successfully
– Service expected to begin soon
• Other networks offer DiffServ (but not PIP yet)
– ARNES, CARnet, DFN, LATNET, RESTENA,
RoEduNet, ULAKBIM
• AMPS Pilot Study: HEAnet, SWITCH, ARNES, RENATER
and GARR
Access to AMPS/PIP
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• Access to GÉANT2 AMPS limited to NREN APMs and
GÉANT2 Ops group
• Users need to make request via an NREN or GÉANT2 Ops
– Does EGEE expect/require direct access to GÉANT2
AMPS?
– If so, does TNLC approve this request?
Future Plans
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• Configuration service
• SLA module
• AA module
– To make system eduGAIN compatible
• AMPS NIS to be replaced by independent cNIS
• Standardisation of the interdomain interface (working with
ESnet and Internet2)
• MPLS functionality planned – will enable alternative paths
to be specified
Config Service
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• (Currently, only JUNOS configs created, by Intra-Domain
service
• PSNC developing Config Service
– Expected Oct 07
• Config Service will use a new, generic XML schema to
describe new configs, and individual driver sub-modules
will convert the generic XML in to OS specific
configurations
• Config may be automatically applied, or mailed to a NOC
and applied manually
SLA Module
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• GRNET have begun work on an SLA module
– Beta version expected Oct 07
• Module will offer SLA (per domain) on
– data rate (the agreed, reserved capacity)
– OWD (latency of links)
– MTU (min MTU of links)
– Packet loss (statistical calculation)
– Jitter (size of queues and/or statistical)
• Assumption: flow takes expected routed path
• Concatenating adjacent SLAs gives an “edge to edge” SLA
Conclusion
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• PIP available now in GÉANT2 and GRNET
– For GÉANT2, contact NREN/GÉANT2
– For GRNET, contact [email protected]
• AMPS pilot service (beta testing) in progress
Thank You
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Any further Questions, Comments, Feedback or Suggestions
please contact
Toby Rodwell ([email protected])