rmdcn network architecture

RMDCN Network Architecture

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Vienna, RMDCN Steering Group 4-6 June 2008

Remy Giraud

ECMWF


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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 724365 basis.

Router Management (PE and CE) – dedicated VPN Owner


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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


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MPLS – Strengths and Weaknesses

Robust Technology

Simpler network management:

- Native any to any connectivity

- Flexible use of available bandwidth

- Simplify the engineering required for site interconnection

- Upgradeability

Allows to benefit from MPLS developments:

- Diversity of access methods (xDSL, Internet, LL…)

- Availability of a large panel of access technologies and bandwidths

- Built-in management of prioritization mechanism with IP and MPLS

Cost improvement on global recurring costs

More efficient backup solution better level of resilience

MPLS corresponds to market network provider core strategy

Traffic partitioning more difficult to implement

Site-to-site bandwidth guarantees are difficult to achieve

Costs are higher for smaller sites (Costs redistribution mechanism)


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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

Flexibleparameterup to the

LL bandwidth

IPBandwidth

LLBandwidth


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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)


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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


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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).


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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


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NAS Back-up Resiliency

ISDN

PSTN

OBS Pop(PE)

EquantNAS

CustomerVPN

EquantIP VPN network Warm standby option

dual CPE

“Warm standby”router Customer site

resiliency

Proxy Radius

Authentication

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

CE – LNSrouter

ECMWF


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Dual Connection – Mission CriticalResiliency

OBSIP VPN NetworkCustomer Site

CE router

CE router

Equant Pop

Dual CPE

Primary Access

Secondary Access

leve

l o

f re

sili

ency


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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


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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


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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


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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

Background – The SRF2 Document


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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


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Country/SiteAccess Speed

IPVPN Port Speed

Resiliency CoSLoad

Balancing

NAS Backup Speed

ECMWF Member States

Austria 2M 1M enhanced Gold NO 512

Belgium 2M 2M enhanced Gold NO 384

Denmark 2M 2M mission critical Gold NO N/A

Finland 2M 768 enhanced Gold NO 256

France 4M 3M mission critical Gold NO N/A

Germany 2M 2M mission critical Gold NO N/A

Greece 1M 768 enhanced Gold NO 384

Ireland 1M 1M enhanced Gold NO 512

Italy 2M 2M mission critical Gold NO N/A

Luxembourg * 2M 768 enhanced Gold NO N/A

Netherlands 2M 768 enhanced Gold NO 384

Norway 2M 2M enhanced Gold NO 1M

Portugal 768 768 enhanced Gold NO 384

Spain 2M 2M enhanced Gold NO 512

Sweden 4M 3M mission critical Gold NO N/A

Switzerland 2M 768 enhanced Gold NO 384

Turkey ** 768 768 extra enhanced Gold NO N/A

United Kingdom 2M 2M mission critical Gold NO N/A

ECMWF 50M 50M mission critical Gold YES N/A


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ECMWF Co-operating States

Croatia 512 512 enhanced Gold NO 256

Czech Republic 2M 2M enhanced Gold NO 1M

Estonia 64 64 enhanced Silver NO 64

EUMETSAT 2M 2M mission critical Gold NO N/A

Hungary 1M 1M enhanced Gold NO 256

Iceland 128 128 enhanced Gold NO 128

Lithuania 128 128 enhanced Silver NO 128

Romania 2M 256 enhanced Gold NO 128

Serbia 512 512 enhanced Gold NO 256

Slovenia 256 256 enhanced Gold NO 256

Other RMDCN Member States

Bulgaria 512 512 enhanced Gold NO 128

China 2M 2M mission critical Gold NO N/A

India 128 128 enhanced Gold NO 128

Japan 1M 1M mission critical Gold YES N/A

Jordan 128 128 enhanced Gold NO 128

Latvia 128 128 enhanced Gold NO 128

Lebanon 128 128 enhanced Gold NO 128

FYR Macedonia 128 128 enhanced Gold NO 128

Poland 128 128 enhanced Gold NO 128

Russian Federation 512 512 mission critical Gold NO N/A

Saudi Arabia * 512 128 enhanced Silver NO N/A

Slovakia 256 256 enhanced Silver NO 128

United Arab Emirates 128 128 enhanced Gold NO 64


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Questions?

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