IP/MPLS Network Planning, Design, Simulation, Audit and Management - - PowerPoint PPT Presentation

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IP/MPLS Network Planning, Design, Simulation, Audit and Management - - PowerPoint PPT Presentation

Mar 29, 2023 176 likes •688 views

IP/MPLS Network Planning, Design, Simulation, Audit and Management Dave Wang, WANDL WANDL Overview Founded in 1986 Headquarters in Piscataway, New Jersey Products: NPAT, IP/MPLSView,VPNView Locations Domestic New

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SLIDE 1

IP/MPLS Network Planning, Design, Simulation, Audit and Management

Dave Wang, WANDL

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SLIDE 2

WANDL Overview

  • Founded in 1986
  • Headquarters in Piscataway, New Jersey
  • Products: NPAT, IP/MPLSView,VPNView
  • Locations

– Domestic

  • New Jersey, Washington D.C., Illinois, California

– International

  • United Kingdom, Belgium, Italy, Taiwan, China
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SLIDE 3

WANDL Software Solutions

WANDL Network Planning Design & Optimisation WANDL IP/MPLS Network Audit & Management

Voice TDM Access ATM/FR IP/MPLS

NPAT

Transport

Live Network Management

IP/MPLSView VPNView

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SLIDE 4

WANDL Core Capabilities

  • Routing Analysis

– Path Tracing

  • Design

– Greenfield and Diversity

  • Failure Simulation
  • Capacity Planning
  • Optimization
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SLIDE 5

Design

Backbone Design Access Design

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SLIDE 6

Simulation

  • Perform exhaustive failure simulation in script mode
  • Verify detailed simulation results via simulation report
  • Verify peak utilization for links under failure simulation

to resize network (if necessary)

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SLIDE 7

Capacity Planning

  • Make recommendations on network expansion

– forecasted network demands

  • Determine where capacity is needed
  • Determine trunks that can be pruned
  • Tune link routing metrics
  • Import NetFlow end-to-end traffic data

– NetFlow v9, Arbor, cflowd, Crannog

  • Guessing traffic matrix

– if only interface traffic is available

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SLIDE 8

Design Automation

  • Basic or Diversity Design
  • Path Computation
  • Diverse Path Computation
  • Network Grooming
  • Fast Reroute Path Computation
  • LSP Tunnel Sizing
  • Metric Balancing
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SLIDE 9

Proactive Service Audit

  • Majority outages caused by human error
  • Info in router configuration files
  • Integrity Checks (IC) based on Config files

– Detect human errors – Detect operational errors

  • Intelligent IC based on routing simulation

– Routing anomalies – Security and ACL reachability – Network element failures

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SLIDE 10

IP/MPLS Management Features

– Integrated FCAPS – Provisioning support

  • Generate VRF Configlets
  • Generate TE/FRR Configlets

– Multivendor support

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SLIDE 11

WANDL IP/MPLSView

IP/MPLS Core Platform (Routing, Design, Outage Simulation) IP/MPLS Core Platform (Routing, Design, Outage Simulation)

MPLS Traffic Engineering, LSP Path Optimization MPLS Traffic Engineering, MPLS Traffic Engineering, LSP Path Optimization LSP Path Optimization

Network Design and Planning requirements Network Design and Planning Network Design and Planning requirements requirements Network Engineering and Operations requirements Network Engineering and Network Engineering and Operations requirements Operations requirements

Online Network Data Management, Diagnostics Online Network Data Online Network Data Management, Diagnostics Management, Diagnostics BGP Integrity and Analysis BGP Integrity and Analysis BGP Integrity and Analysis Configuration Revision, Integrity Check Conformance Configuration Revision, Configuration Revision, Integrity Check Integrity Check Conformance Conformance Online Traffic Management Online Traffic Management Online Traffic Management Class Of Service Class Of Service Class Of Service VPN (L2/L3/VPLS) VPN (L2/L3/VPLS) VPN (L2/L3/VPLS) Hardware Inventory Hardware Inventory Hardware Inventory Traffic Load Analysis Traffic Load Analysis Traffic Load Analysis Multicast Multicast Multicast DS-TE (E-LSP/L-LSP) DS DS-

  • TE (E

TE (E-

  • LSP/L

LSP/L-

  • LSP)

LSP) VoIP VoIP VoIP IPV6 IPV6 IPV6 Trap Event Management Trap Event Management Trap Event Management

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SLIDE 12

Service Provider Challenges

  • Multivendor
  • Multilayer
  • Multiprotocol
  • Multiservice
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SLIDE 13

Multivendor Challenges

  • Hardware Vendor
  • Hardware Vendor NMS

– 5620 SAM, IPSC, iManager, JUNOscope

  • Many Service Management vendors

– HP, IBM, Lucent, Oracle, …

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SLIDE 14

Multivendor Challenges

  • Language problems
  • Defaults
  • Inter-Op
  • Versions/Features
  • 3rd party NMS
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SLIDE 15

Language Problems

  • ATM example: PVC

– Alcatel means 5620 – Cisco and Lucent means SPVC – Marconi means Permanently nailed

  • Issues for human operators

– to deal with different terminology

  • Issues for modeling software (WANDL)

– deal with differences automatically

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Language Problems

  • Config files

– Output of “show config” – IOS, IOX, JUNOS, …

  • Can be very similar (Command Line Interface)
  • Can be very different (languages)

– Interfaces – Protocols – Routing, routing, routing, …

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SLIDE 17

Language Problems

  • Same meaning

– MPLS Traffic Engineering Tunnel – Label Switched Path

  • Same meaning

– Affinity/Mask – Admin Group

  • Different meaning: MPLS Fast Reroute

– Path protection – Link / Node protection

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SLIDE 18

Defaults

  • 1000 means 1 MB or 1 Kb ?

– Alcatel-Lucent, Cisco, Juniper, etc. different conventions

  • MPLS-TE priority

– Conventions and defaults on priority and hold settings for LSP – Different vendor implementations

  • OSPF reference bandwidth

– 100,000,000 is no longer adequate

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SLIDE 19

Inter-Op

  • MPLS TE multiple color constraints

– And ? Or ? – Different vendor interpretations on logic

  • Naming Convention

– Must name as Tunnelxxx or Tunnelx/y/z – Can be arbitrary

  • Features and implementation details can

be different

– DS-TE RDM, MAM, etc.

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SLIDE 20

WANDL – 5620 SAM Integration

  • Collect configuration and tunnel

information from the 5620 SAM

  • Offline design/analysis and upload

changes to the live network

– Service activation through SAM XML over SOAP – Upload changed information to the SAM

  • Bandwidth changes
  • Path (dynamic/explicit) and FRR properties
  • LSP definitions
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SLIDE 21

Multilayer Challenges

  • Shared Risk Link Groups (SRLG)

– IP/ATM over TDM – ATM/TDM over IP – IP over Optical/DWDM

  • Common failure points with multiple layers

– Conduit failure>multiple fibre cuts>wavelengths failed>LSP paths down

  • LSP backup paths may share common

failure points with primary path

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Multilayer Challenges

  • MPLS itself is a multilayer technology

– Layer 3 : IP – Layer 2 : MPLS-TE

  • Interaction between IGP and MPLS-TE

– AutoRoute Announce

  • Participate in topology state flooding or not

– No AA

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Multiprotocol Challenges

  • IGP : OSPF, ISIS, static

– OSPF areas – ISIS level1/level2

  • BGP : iBGP, eBGP, mBGP

– route reflectors, confederation – Carrier Supporting Carrier (CSC)

  • MPLS : LDP, RSVP

– LDP – RSVP, CSPF

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SLIDE 24

MPLS Service Applications

  • MPLS VPN

– Layer 3 RFC2547-bis VPN

  • Replacing ATM/FR services

– Layer 2, PW, VPLS, CCC

  • MPLS TE/FRR

– Voice, Video, NGN

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SLIDE 25

Multiservice Challenges

  • Voice

– MPLS TE/FRR ?

  • Data

– Diversity

  • Video

– P2MP-TE ?

  • CoS, QoS
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SLIDE 26

Multiservice Challenges

  • Single or separate networks?

– Internet – MPLS VPN – NGN

  • Large service provider

– may have separate network for each

  • Small service provider

– may merge all into a single network

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SLIDE 27

Summary

  • In moving toward and IP/MPLS backbone, service

providers are facing new and unexpected challenges including multiple vendor environments, multiple layer topologies, and multiple applications and services.

  • Network management requires a high-level of visibility

into the network in order to accurately model the various layers and interdependencies.

  • The observed trend is toward consolidation of OSS tools

to simplify data consistency across multiple sources, as well as tool management. Fewer tools that can address a broader scope.

– WANDL's IP/MPLSView platform addresses fault-management, configuration and performance in the FCAPS framework.

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SLIDE 28

Network Network Visualization Visualization

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SLIDE 29

Access Homing Design

Input Output

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SLIDE 30

Wireless backhaul Design

The highlighted links are less than 3.91 miles.

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P2MP Hub selection

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9000 locations

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Backbone Backbone Topology Topology Visualization Visualization

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Mesh Topology

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SLIDE 35
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SLIDE 36

IP/MPLS Backbone

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SLIDE 37

Multi-vendor network

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Routers: 402 Cisco + Juniper Interfaces: 902 OC192 + OC48 AS Nodes: 1103 Peering AS Links: 2650

MPLS+BGP Network Scalability

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SLIDE 39

Network statistics Routers: 3114 Cisco Interfaces: 4912 ATM, OCx BGP speakers: 391 Two Levels of RR

Route Reflector Hierarchy

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SLIDE 40

Routers: 77 Cisco Interfaces: 158 OC3 + T3 VPNs: 255 iBGP RR for VPN # PE = 52

OSPF +MPLS VPN Network

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SLIDE 41

Routers: 1570 Cisco Interfaces: 4,230 STM1, ATM156M # VPN: 4,243 1,862 BGP Neighbors iBGP RR for VPN

ISIS + VPN Network

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SLIDE 42

Routers: 159 Cisco, Juniper, Unisphere Interfaces: 354 OC192/48/12/3, ET., MPLS Map with VT

Multi-vendor MPLS Network

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SLIDE 43

Routers: 143 Cisco Interfaces: 358 OC3 + T3 OSPF Areas: 19

OSPF Area Scalability

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SLIDE 44

A Big OSPF Network

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SLIDE 45

Another View

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Topology: Advanced Protocol Filtering

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SLIDE 47

MPLS VPN MPLS VPN

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SLIDE 48

MPLS VPN

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Route Target Relationship View

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Questions