Cisco - Large Telco Network Operations Architecture 1505

7/20/1999

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© 1999, Cisco Systems, Inc.

Large Telco Network Operations Architecture Session 1505

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© 1999, Cisco Systems, Inc.

Cisco Systems Confidential

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7/20/1999

Agenda

• Operations Challenges • Large Networks and Network Operations • Operations Network Architecture • Cisco Solution 1505 1004_05F9_c4

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© 1999, Cisco Systems, Inc.

Agenda

• Operations Challenges • Large Networks and Network Operations • Operations Network Architecture • Cisco Solution 1505 1004_05F9_c4

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© 1999, Cisco Systems, Inc.

Cisco Systems Confidential

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7/20/1999

Building the New World

Services Networks

Operations

Support

Cisco IOS® Software

Provisioning

Technical

Administration

Marketing

Maintenance

Financial

Billing

Training

Products Architectures Technology

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© 1999, Cisco Systems, Inc.

Telco Operations Challenges • Need to bring new services to market faster

NOC

• Rapid network element growth (for example, SONET/SDH) • Multiple-vendor environments • Competitive differentiation • Technology migration

Operations Network Service Network

• Operations cost reduction 1505 1004_05F9_c4

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© 1999, Cisco Systems, Inc.

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Agenda

• Operations Challenges • Large Networks and Network Operations • Operations Network Architecture • Cisco Solution 1505 1004_05F9_c4

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© 1999, Cisco Systems, Inc.

Large Networks • Central offices or POPs > 300 • Voice switches > 300 • Transmission > 1000 nodes SONET/SDH rings 100s to 1000s • Network operations centers—2 min. • Other STP, SCP, OSS, FR, ATM • New world network elements 1505 1004_05F9_c4

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© 1999, Cisco Systems, Inc.

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What Is a Data Communications Network? Network Elements (NE)

Data Communications Network

Network Operations Center (NOC)

DCN

Operations Support Systems (OSS)

GNE

ADM SONET,SDH, DWDM TDM TDM

Workstation

ISR 3303 IP/OSI,ASYNC, X.25 (XOT) FR, ATM, T1/E1

MUX

DIAL

SLC, IDLC, FITL, FOTS Mediation if required

DSL

Mainframe or Mini

OSS to NE Connectivity

Switch ATM Digital Switch, Digital Cross-Connect Switch, Frame Relay, ATM, SS7 STP 1505 1004_05F9_c4

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© 1999, Cisco Systems, Inc.

Network Operations Service-Level Agreements Customer Data

Product and Services Data Service Management Performance Data Orders

Bills

Service Management Layer

Faults Network Management Layer

Failure to Meet SLA Rebate

Element Management Layer

Orders Faults

Network Usage Data

DCN Network Elements

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© 1999, Cisco Systems, Inc.

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Evolution of Applications on the DCN

• Transmission connectivity • SS7 applications • Class 5 switch applications • CEV connectivity • New world platforms 1505 1004_05F9_c4

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Existing DCNs Switch

Switch

DCS SONET/SDH Ring

SONET/SDH Ring

Switch

SONET/SDH Ring

MUX

PBX

Existing DCN X.25 or Proprietary

OSS 1505 1004_05F9_c4

OSS

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7/20/1999

Evolution of Applications on the DCN Network Element

• • • •

Transmission SS7 Class 5 Switch CEV

• Transmission • SS7 • Class 5 Switch • CEV • New World NEs

Network Element

IP/OSI

Async/X.25 Existing DCN

Emerging DCN

Async/X.25

Workstation, e.g., OSI

IP/OSI OSS OSS 1505 1004_05F9_c4

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© 1999, Cisco Systems, Inc.

DCN Evolution • Majority are X.25-based • Some are proprietary or private line networks • Existing DCNs can be migrated to a single DCN utility • Supports async, X.25, IP, and OSI-based NEs • Designed for SONET/SDH network scalability 1505 1004_05F9_c4

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© 1999, Cisco Systems, Inc.

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7/20/1999

Need for a Common Network? OSS

X.25/ Proprietary Network

OSS

CO

CO

TCP/IP Network

CO

CO

CO

OSI Network

CO

CO

CO CO

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CO

CO

CO

CO

CO

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© 1999, Cisco Systems, Inc.

DCN—Network of Networks OSS

OSS

The Network of Networks

CO

CO

CO

CO

CO

CO

CO

CO CO

CO CO

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CO

CO

CO 16

© 1999, Cisco Systems, Inc.

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7/20/1999

Agenda

• Operations Challenges • Large Networks and Network Operations • Operations Network Architecture • Cisco Solution 1505 1004_05F9_c4

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© 1999, Cisco Systems, Inc.

DCN—3 Tiered Architecture

Access— Central Office 1505 1004_05F9_c4

Distribution

Backbone

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DCN Design Variables • Types, numbers, and growth of network elements • Physical interfaces (RS232, RS449, RS530, V.35, 10BT) • Protocols (Async, X.25, IP, OSI, TL1, CMIP, SNMP, proprietary) • OSS locations and applications 1505 1004_05F9_c4

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© 1999, Cisco Systems, Inc.

Agenda

• Operations Challenges • Large Networks and Network Operations • Operations Network Architecture • Cisco Solution 1505 1004_05F9_c4

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© 1999, Cisco Systems, Inc.

Cisco Systems Confidential

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7/20/1999

What Is a Data Communications Network? Network Elements (NE)

Data Communications Network

Network Operations Center (NOC)

DCN

Operations Support Systems (OSS)

GNE

ADM SONET,SDH, DWDM TDM TDM

Workstation

ISR 3303 IP/OSI,ASYNC, X.25 (XOT) FR, ATM, T1/E1

MUX

DIAL

SLC, IDLC, FITL, FOTS Mediation if required

DSL

Switch

OSS to NE Connectivity

Mainframe or Mini

ATM Digital Switch, Digital Cross-Connect Switch, Frame Relay, ATM, SS7 STP 1505 1004_05F9_c4

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© 1999, Cisco Systems, Inc.

Satisfying Needs • CO environment • Migration • Flexibility • Port density • Scaling • Cost reduction 1505 1004_05F9_c4

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Price

Cisco DCN Solution

Cat 1924 DC

Cisco 2600 Series

Cisco 3662 Series

Scalability 1505 1004_05F9_c4

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© 1999, Cisco Systems, Inc.

Central Office Environment

• NEBS level 3 compliant • 12” or less in depth • 19” or 23” mounting brackets • –48v DC power • CLEI coding 1505 1004_05F9_c4

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Cisco IOS Software: The Center of Your Network

•

•

One Flexible Network Infrastructure

The ‘glue’ that enables seamless integration

Industryleading, standardsbased technologies

•

Runs the Internet

Cisco IOS Software

Cisco’s foundation networking software

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•

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© 1999, Cisco Systems, Inc.

Current Cisco IOS DCN Feature Support hNew X.25 engine hPAD features hProtocol translation

Cisco Cisco IOS IOS Software Software

hCLNS routing—ISO 8473 hInternal organization of the network layer—ISO 8348 hES-IS—ISO 9542 hIS- IS—ISO 10589 hIntegrated IS-IS—RFC 1195 hInterdomain routing via Cisco ISO-IGRP hTARP—GR-253 1505 1004_05F9_c4

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Cisco IOS Telco Image hIP routing protocol services BGP, IS-IS, and OSI routing

hMultiprotocol WAN router

Cisco Cisco IOS IOS Software Software

X.25 services Switching X.28 Async PAD X.25/IP protocol translation ISDN services Frame Relay services ATM connectivity PPP features 1505 1004_05F9_c4

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© 1999, Cisco Systems, Inc.

Cisco IOS Telco Features • Network Scaling (SONET/SDH) IS-IS Multi-Area Manual Area Addresses

Cisco Cisco IOS IOS Software Software

• Performance (SONET/SDH) TARP Storm Avoidance TARP Split Horizon Protection • Migration (Async/X.25) X.25 over TCP/IP BX.25 X.25 Hunt Group DNS Routing for X.25 1505 1004_05F9_c4

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Migration Feature X.25 over TCP/IP—RFC 1613 (XOT) Network Elements

X.25 BX.25

IP

IP

Frame Relay

FR

X.25 Host

IP FR X.3 PAD

Craft Device VT100

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BX.25 Host

Note: Annex G also support provided

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© 1999, Cisco Systems, Inc.

Migration Feature BX.25 Support • Lucent protocol (circa 1982) • X.25 Variant • BX.25 natively over X.25 or TCP (XOT): Turn off I-Frame… used to carry a password between host & switch Disable LAPB Unnumbered I-Frames Modify X.25 parameters: Window size 3, Modulo 8, Packet size 512k 1505 1004_05F9_c4

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Migration Feature X.25 Hunt Group • X.25 serial line rotary on single router • ITU-T standard • VC count, round robin, master rotary 31104085272400

X.25

Call 31104085272400

X.25 Host

31104085272478

PAD

WAN

31104085272411 31104085272425 31104085272499

X.25 1505 1004_05F9_c4

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© 1999, Cisco Systems, Inc.

Migration Feature Current X.25 over TCP/IP Addressing • X.25 over TCP unnatural!

X.25 Host

RFC 1613

IP

• Static routes in all routers for all destinations X25 route 1234 XOT 1.1.1.1 1000 destination = 1k route statements!

• Move 1 host, change tables in X routers • Mnemonics get resolved locally 1505 1004_05F9_c4

WAN IP

X.3 PAD

Async User 32

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Migration Feature DNS Routing for X.25 X.25 Host

• Use of Domain Name Server • Single static route in all routers for all destinations

IP

WAN

X25 route * XOT use DNS 1000 destination = 1 route statement!

IP IP

• Move 1 host, change tables in one DNS server

DNS Server

• Mnemonics resolved via DNS, not locally 1505 1004_05F9_c4

X.3 PAD

Async User 33

© 1999, Cisco Systems, Inc.

Migration Feature Manual Area Addresses • ISO 10589 recommends that no more than 3 MAAs per area

Router_ABC

L2 L1

Area A+B+C

• Increased the number from 3 to 256 per router • Allows the network to be implemented without re-addressing NEs or rings 1505 1004_05F9_c4

Router_A

Router_B

L1

L1

Area A

Area B 34

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Scaling Feature IS-IS Multi-Area • Currently ISO 10589 only allows for 1 Area per router • Cisco has enhanced IS-IS to allow multiple OSI Areas per router • Initially up to 12 level 1 instances per Cisco 3662-DC-CO, (3 for Cisco 2600-DC) • Single level 2 instance • Allows ISIS to scale • Saves router HW cost • Solves re-addressing issues

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Cisco 3662-DC-CO

NE

NE

NE

NE

NE

NE

NE

NE

Area A Area B

NE

NE

NE

NE

Area C

Area D

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© 1999, Cisco Systems, Inc.

Large Central Office Using Cisco 2500 Series Routers OSI/IP Integrated IS-IS

Central Office Boundary

T1 Cisco 2514s 40 Cisco 2514s

L1/L2 30 Cisco 2522s NE

Catalyst 1924-DC

NE NE

NE NE

Digital Cross Connect System (DCS e.g., Titan 5500)

OSI Area 1

Optical Loop Carrier Systems (e.g., Litespan 2000)

NE

NE

NE NE

NE

L1 OSI/IP

Intelligent DS1 Delivery Systems (e.g., Soneplex)

X.25/IP

NE

10BT Catalyst 1924-DC

240 Async/Sync Ports

40 OSI areas

OSI Area 2 NE

NE NE

NE NE

NE

.. .

OSI Area 12 NE

Uses 40 Cisco 2514s. 1505 1004_05F9_c4

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© 1999, Cisco Systems, Inc.

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Cost and Complexity Reduction Using Cisco 3662-DC-CO in Large Central Office OSI/IP IS-IS and OSPF

T1 Central Office Boundary NE NE

3 3662-DC-CO

L1/L2

NE NE

4 3662-DC-CO NE

NE

OSI Area 1 NE

NE NE

Digital Cross (SONET ADM) Connect NE System (DCS e.g., Titan 5500) Optical Loop Carrier Systems (e.g., Litespan 2000) Intelligent DS1 Delivery Systems (e.g., Soneplex)

NE NE

10BT Catalyst 1924-DC

NE

10BT Catalyst 1924-DC

NE NE

NE

.. .

NE

OSI Area 12 NE

X.25/IP 144 Async/Sync

OSI Area 2 NE

NE

40 OSI areas - Ethernet X.25/IP - 96 Async/Sync

Replaces 40 Cisco 2514s. 1505 1004_05F9_c4

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© 1999, Cisco Systems, Inc.

Migration Feature TARP

• SIF standard for resolving layer 7 address to a layer 3 address • Resolves the TL1 identifier to active network layer address (i.e., TID to NSAP, TID to IP, etc. )

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Performance Feature TARP Storm Avoidance hNo need to flood all TARP packets hForward TARP packets to necessary routers only hAllows for TARP caches to be located anywhere within the network hAllows users to decide which routers should hold the TARP cache Network Operations Center NE

TID Not Cached L1/L2

NE

NE

TARP Cache

A

3 1 2a

NE

L1/L2

OSI Area

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A1 2b

B

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© 1999, Cisco Systems, Inc.

Performance Feature TARP Split Horizon Protection • TARP packets follow TARP adjacencies • Don’t forward requests out an incoming interface

Distribution Routers TARP Request

3 2

CO Access

1 NE NE

NE NE

• Removes unnecessary packets from network 1505 1004_05F9_c4

TARP Packets Not Forwarded

NE NE

NE NE NE NE

NE NE NE NE

NE NE NE NE

NE NE

NE NE NE NE

TARP Requests

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Migration Feature Async Call Queuing • • • •

Async port access contention CO platform queues telnet calls Authenticate each connection via Radius or AAA Enables operations more efficient port access Telnet to vty Async Conversion

Simultaneous Telnet Users

3 Async Interfaces

WAN DMS 100 User in queue status 1505 1004_05F9_c4

Call Queuing on Cisco 3662-DC-CO 41

© 1999, Cisco Systems, Inc.

Cisco DCN Solution Roadmap Asynch Call Queuing CY4Q99

• Cisco 3662-DC-CO • Cisco 26xx-DC • Catalyst 1924-DC • Cisco IOS Telco Feature Set IP Routing; BGP, ISIS, OSI X.25 Support/X.28 PAD X.25-IP PT DNS Routing for X.25 Multi OSI Area Support TARP Support, Storm Detection, Split Horizon BX.25 Transport

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Cisco IOS Telco Features Under Consideration

• ISL for CLNS (cost reduction) • IS-IS MIB support (migration) • Inter-domain routing protocol via BGP4++ (scaling) • TARP ARP server (migration) 1505 1004_05F9_c4

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© 1999, Cisco Systems, Inc.

Medium/Large Central Office Model Using C25xx Routers To Core

PAST OSI/IP Integrated IS-IS

L2

Central Office Boundary

T1 Cisco 2514s

L2 12 Cisco 2522s

12 Cisco 2514s

NE

VLAN

OSI Area 1 10BT Cat1924

Optical Loop Carrier Systems (e.g., Litespan 2000)

10BT Cat1924 OSI/IP L1/L2

NE

NE

NE

NE NE

NE

OSI Area 2 NE

NE

Intelligent DS1 Delivery Systems (e.g., Soneplex)

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NE NE

Digital Cross Connect System (DCS e.g., Titan 5500)

X.25/IP

NE NE

NE

NE NE

96 A/S Ports

NE

.. .

OSI Area 12 NE

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Simplification—Cost Reduction Medium/Large Central Office Sync/Async NE Interfaces To Core

PAST

To Core

TODAY OSI/IP Integrated IS-IS

T1

Central Office Boundary

(SONET ADM)

L2 T1

Central Office Boundary

Cisco3662-DC-CO X.25/IP

(SONET ADM)

12 Cisco 2522s X.25/IP

NE

NE

Digital Cross Connect System (DCS e.g., Titan 5500)

10BT Cat1924

10BT Cat1924

Digital Cross Connect System (DCS e.g., Titan 5500)

Optical Loop Carrier Systems (e.g., Litespan 2000)

Optical Loop Carrier Systems (e.g., Litespan 2000)

Intelligent DS1 Delivery Systems (e.g., Soneplex)

Intelligent DS1 Delivery Systems (e.g., Soneplex)

48 A/S Ports, 192 Async

96 A/S Ports 1505 1004_05F9_c4

Before

After 45

© 1999, Cisco Systems, Inc.

Simplification—Cost Reduction Medium/Large Central Office OSI/IP Ethernet Interfaces To Core

PAST

To Core

FUTURE

OSI/IP

OSI/IP

T1 Central Office Boundary

T1

Cisco 2514s 12 Cisco 2514s VLAN

NE

NE

10BT Cat1924

NE

NE

Cat1924

OSI/IP L1/L2

NE

NE

OSI L1/IP

NE

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NE

NE NE

NE

NE

NE

NE NE

NE NE

OSI Area 1 NE

10BT

NE

NE

NE NE

NE

NE

NE

NE

Fast Ethernet

NE

10BT Cat1924

Csico 3662-DC-CO OSI L1/L2 ISL VLAN

NE NE

Central Office Boundary

NE NE

NE

Before

NE

OSI Area 2

.. .

OSI Area 12

NE

After 46

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Medium/Large Central Office Cisco 3662-DC-CO Application To Core

TODAY OSI/IP Integrated IS-IS

L2

Central Office Boundary

T1 3662-CO OSI L1/L2

(SONET ADM)

NE NE

NE NE

OSI Area 1

NE

Digital Cross Connect System (DCS e.g., Titan 5500)

NE

X.25/IP

NE

96 A/S NE

10BT Cat1924

Optical Loop Carrier Systems (e.g., Litespan 2000)

NE NE

NE

NE

NE NE

NE NE

Intelligent DS1 Delivery Systems (e.g., Soneplex)

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OSI Area 2

NE

.. .

OSI Area 12 NE

OSI L1 SONET/SDH Interface 47

© 1999, Cisco Systems, Inc.

Medium/Large Central Office Cisco 3662-DC-CO Application To Core

FUTURE IP

Central Office Boundary

T1 3662-DC-CO OSI L1/L2

(SONET ADM)

NE NE

NE NE

NE

Digital Cross Connect System (DCS e.g., Titan 5500)

X.25/IP 96 A/S

VLAN

ISL Fast Ethernet

Cat1924

Optical Loop Carrier Systems (e.g., Litespan 2000)

OSI Area 1 NE

NE

NE

NE NE

NE

10BT

NE

NE NE

NE NE

Intelligent DS1 Delivery Systems (e.g., Soneplex)

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OSI Area 2

NE

.. .

OSI Area 12 NE

OSI L1/IP SONET/SDH Interface 48

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7/20/1999

Small Central Office Cisco 2600-DC Application To Core

FUTURE OSI/IP Integrated IS-IS

L2

Central Office Boundary

T1

X.25/IP 8A/S (SONET ADM)

2610/2611 DC OSI L1/L2 NE

NE

Digital Cross Connect System (DCS e.g., Titan 5500)

NE NE

Cat1924

10BT

NE

OSI Area 1 NE

NE

OSI Area 2 NE

OSI Area 3

Optical Loop Carrier Systems (e.g., Litespan 2000)

OSI L1/IP SONET/SDH Interface

Intelligent DS1 Delivery Systems (e.g., Soneplex)

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NE

VLAN

ISL Fast Ethernet

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© 1999, Cisco Systems, Inc.

Why Cisco Solution? • Operations network consolidation • Scaling IP/OSI connectivity • Cost effective for X.25 and async • Simplify management and maintenance • Management same as enterprise implementations • Most cost effective total solution 1505 1004_05F9_c4

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Please Complete Your Evaluation Form Session 1505

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