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RMDCN Network Architecture. Vienna, RMDCN Steering Group 4-6 June 2008 Remy Giraud ECMWF. Standard Service Elements. Bandwidth for each User Site; User Site-specific service and traffic management through COS mechanisms Service Levels depending on the Service Type selected by User Sites;

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rmdcn network architecture

RMDCN Network Architecture

Vienna, RMDCN Steering Group 4-6 June 2008

Remy Giraud

ECMWF

RMDCN Network Architecture

standard service elements
Standard Service Elements
  • Bandwidth for each User Site;
  • User Site-specific service and traffic management through COS mechanisms
  • Service Levels depending on the Service Type selected by User Sites;
  • Secured VPN provided through Multi Protocol Label Switching (“MPLS”) technology;
  • Access leased line including its provisioning and monitoring;
  • Regular reporting on the VPN performance (Quality of Service indicators);
  • Network Management and Fault management for all Service elements, all provided on a 724365 basis.
  • Router Management (PE and CE) – dedicated VPN Owner

RMDCN Network Architecture

rmdcn service elements
RMDCN Service Elements
  • Connection to the Network
    • In general, doubling of Frame Relay access speed – IP BANDWIDTH
    • Speed Access Line - nearest available
    • Direct (Leased Line, Ethernet) CE – PE or Frame Relay PVC between CE and PE
  • Gold Service Type
    • Class of Service
  • Backup
    • Enhanced Resilience: NAS ISDN Backup
      • ISDN Speed limitation (OBS support)
    • Mission Critical Setup

RMDCN Network Architecture

mpls strengths and weaknesses
MPLS – Strengths and Weaknesses

RMDCN Network Architecture

access methods dedicated access
Access Methods - dedicated Access
  • Technologies
    • Native IP – Direct access (LL)
    • Frame Relay access, Ethernet access type
  • IP Bandwidth
    • A unique service on each type of dedicated access
    • A flexible parameter for the site sizing
    • From 64 kbps up to 50 Mbps

LL

Bandwidth

IP

Bandwidth

Flexible

parameter

up to the

LL bandwidth

RMDCN Network Architecture

what define an access to the mpls cloud
What define an access to the MPLS Cloud ?
  • Access Line
  • IP Bandwidth
  • Standards OBS Service Type
    • GOLD – Data Classes Of Service Standard COS profiles
      • 60% - D1, 30% - D2, 10% - D3
      • 66% - D1, 33% - D2
      • 100% - D2
    • SILVER – Unique COS
      • 100% of the IP bandwidth
  • Approved option for the traffic allocation:
    • D1: 75% - ECMWF dissemination and GTS
    • D2: 20% - Aladin/RETIM/LACE/coupling File Transmission
    • D3: 5% - Other (Default)

RMDCN Network Architecture

cos management
COS Management
  • Data classes D1, D2 and D3
    • CB-WFQ for all classes (relative weight = relative priority in case of congestion)
    • No layer 3 shaping: Each data class can use up to the IP bandwidth
    • No more Frame Relay facilities: Traffic always limited to the IP bandwidth

CB-WFQ: Class Based – Weighted Fair Queuing

RMDCN Network Architecture

application classification rules
APPLICATION CLASSIFICATION RULES
  • From the CE to the Backbone.
    • OBS has configured the Network’s application classification rules that define how the CE router manages the application traffic classification (ie prioritization) for the outgoing traffic. Application traffic is assigned to the corresponding COS class (D1, D2 or D3). Unclassified application traffic will by default be assigned to the “by default” COS class.
  • From the Network to the CE.
    • In this direction, the Network takes precedence over the sender User Site (using COS) and automatically classifies the received data in the same COS. If the COS used is not configured on the access, then the received traffic is classified as “unknown type of traffic” and put in the “by default” COS configured on the access. The per-COS traffic assignment rules correspond to how traffic flow is mapped to a COS, and is similar to specifying an access control list. If any incoming traffic is received that does not match any of the provided rules, this traffic is sent into the lower level class (might be D2 or D3).

RMDCN Network Architecture

contingency solutions
CONTINGENCY SOLUTIONS
  • Standard Connection
    • NAS BACKUP – SINGLE CPE
    • NAS BACKUP – DUAL CPE (Warm Standby) – Enhanced
    • ON-NET BACKUP – DUAL CPE
  • Mission Critical Connection
    • DUAL CONNECTION – SHADOW ACCESS – SINGLE CPE
    • DUAL CONNECTION – SHADOW ACCESS – DUAL CPE
      • Mission Critical

RMDCN Network Architecture

nas back up resiliency
NAS Back-up Resiliency

Proxy

Radius

“Warm standby”

router

Customer site

ISDN

PSTN

Authentication

Equant

NAS

Customer

VPN

Equant

IP VPN

network

Warm standby option

dual CPE

OBS Pop

(PE)

resiliency

CE – LNS

router

  • Hub site: 1 access supporting
  • Private Dial traffic
  • Traffic to the VPN

ECMWF

RMDCN Network Architecture

dual connection mission critical resiliency
Dual Connection – Mission CriticalResiliency

OBS

IP VPN Network

Customer Site

Primary Access

Equant Pop

level of resiliency

Secondary Access

CE router

Dual CPE

CE router

RMDCN Network Architecture

traffic partitioning
Traffic Partitioning
  • MPLS IPVPN:
    • No PVC – No CIR – No guaranteed throughput between source destination
    • Any-to-any connectivity
  • To limit the any-to-any exposure Access Control Lists can be defined on local routers

RMDCN Network Architecture

routing issues
Routing issues
  • Between CE router and NAS router: HSRP
  • Mission Critical Setup: 2 CE routers - HSRP
  • LAN Route redistribution
    • BGP
    • EIGRP
    • OSPF
    • RIP v1, RIP v2
    • Static

RMDCN Network Architecture

background the srf2 document
Background – The SRF2 Document
  • Service Request Form 2
    • Used by OBS to
      • Collect the technical information for each RMDCN site
      • Internally build the CE routers configurations
    • ECMWF is the entry point
      • Complete the SRF2 documents on behalf of the RMDCN sites

RMDCN Network Architecture

background the srf2 document1
Background – The SRF2 Document
  • The pre-filled OBS SRF2 document
    • One pre-filled SRF2 by OBS per RMDCN IPVPN site
    • The focus is on the required technical details pages

RMDCN Network Architecture

service metrics and help desk
Service Metrics and Help Desk
  • SLA 99.9% (100% for Mission Critical sites)‏
  • Now Site Availability (used to be PVC availability)‏
  • Pro-active monitoring
    • 24 User Sites
    • Only English language
    • OBS Help Desk in New Delhi‏
  • Re-active monitoring
    • 18 User Sites
    • Local Language

RMDCN Network Architecture

questions

Questions?

RMDCN Network Architecture