1 Assessing Risk in the Physical Build of a Network REANNZ - - PowerPoint PPT Presentation

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1 Assessing Risk in the Physical Build of a Network REANNZ - - PowerPoint PPT Presentation

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1 Assessing Risk in the Physical Build of a Network REANNZ lunchtime presentation 2019 WHAT REANNZ HAS LEARNED ABOUT ASSESSING RISK IN THE PHYSICAL NETWORK BUILD 2 Assessing Risk in the Physical Build of a Network REANNZ lunchtime

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1 Assessing Risk in the Physical Build of a Network – REANNZ lunchtime presentation 2019

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2 Assessing Risk in the Physical Build of a Network – REANNZ lunchtime presentation 2019

WHAT REANNZ HAS LEARNED ABOUT ASSESSING RISK IN THE PHYSICAL NETWORK BUILD

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4 Assessing Risk in the Physical Build of a Network – REANNZ lunchtime presentation 2019

DESIGNING FOR HIGH AVAILABILITY

  • Consider requirements
  • Consider budget
  • Avoid complexity
  • Understand single points of failure
  • Connectivity
  • Power
  • Hardware
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5 Assessing Risk in the Physical Build of a Network – REANNZ lunchtime presentation 2019

CONSIDER REQUIREMENTS

  • What does high availability mean to your business?
  • 99.99% is 52 minutes 36 seconds per year
  • 99.999% is 5 minutes 15 seconds per year
  • 24x7 or 8x5?
  • Scheduled maintenance time?
  • Network availability and service availability can be

different

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6 Assessing Risk in the Physical Build of a Network – REANNZ lunchtime presentation 2019

AN EXAMPLE OF REQUIREMENTS VS BUDGET

HLZ MUP WLG CHC LCN AVL PMR ROT DUD IVM AKL MTA

MORST RFP Design for NREN KAREN 2006

HLZ MUP WLG CHC LCN AVL PMR ROT DUD IVM AKL MTA NSH NPE CROF NSN

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7 Assessing Risk in the Physical Build of a Network – REANNZ lunchtime presentation 2019

AVOID COMPLEXITY

  • Chose which layer your network will be protected at
  • Consider soft failures as well as hard failures
  • How trusted is the technology?
  • While automated failover is usually the right answer there are

times where it’s not achievable

  • Where are spares located?
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8 Assessing Risk in the Physical Build of a Network – REANNZ lunchtime presentation 2019

REANNZ 2006 - SOME OBVIOUS POINTS OF FAILURE & SOME NOT SO OBVIOUS

HLZ MUP WLG CHC LCN AVL PMR ROT DUD IVM AKL MTA NSH NPE CROF NSN

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9 Assessing Risk in the Physical Build of a Network – REANNZ lunchtime presentation 2019

PHYSICAL INFRASTRUCTURE MATTERS WHEN ASSESSING RISK

WLG CHC DUD NSN Blenheim Timaru Oamaru

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10 Assessing Risk in the Physical Build of a Network – REANNZ lunchtime presentation 2019

CONNECTIVITY EXAMPLES

  • Lincoln PoP
  • Napier-Gisborne
  • Cook Strait
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11 Assessing Risk in the Physical Build of a Network – REANNZ lunchtime presentation 2019

LINCOLN POP

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15 Assessing Risk in the Physical Build of a Network – REANNZ lunchtime presentation 2019

HAWKES BAY – POVERTY BAY

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16 Assessing Risk in the Physical Build of a Network – REANNZ lunchtime presentation 2019

COOK STRAIT

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A FINAL OBSERVATION ABOUT FIBRE PATHS

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18 Assessing Risk in the Physical Build of a Network – REANNZ lunchtime presentation 2019

REANNZ POP - POWER

  • Diverse power feeds on separate infrastructure
  • Backed by UPS
  • Backed by Generator
  • DC Power capable equipment
  • Correctly identified and delivered in a way that allows for

clear understanding of power usage

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19 Assessing Risk in the Physical Build of a Network – REANNZ lunchtime presentation 2019

REANNZ MX480 DC SYSTEM

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REANNZ MX480 AC SYSTEM

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REANNZ AC CABLING

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REANNZ POP - HARDWARE

  • Key sites have redundant
  • Routing engines (RE’s)
  • Switch fabrics (SCBE’s)
  • Power modules (PEM’s)
  • Line cards (FPC’s)
  • Interface cards (MIC’s)
  • As sites get smaller the routers have fewer redundant

components

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REANNZ POP – MX480

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REANNZ POP – MX80

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REANNZ POP – MX104

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WHAT CAN YOU TAKE AWAY FROM WHAT REANNZ HAS LEARNED

  • Have a clear understanding of the goal
  • Understand the physical infrastructure beneath any services

purchased

  • Understand power delivery and how your equipment consumes power
  • Plan for components or systems to fail and think about how long it will

take to deploy spares – test this if possible

  • Understand and document your risks. Not everything can be mitigated
  • r should be. Cost vs Risk vs Requirements.
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27 Assessing Risk in the Physical Build of a Network – REANNZ lunchtime presentation 2019