Cisco SD-WAN Migration Guide

1 Cisco Public. All printed copies and duplicate soft copies are considered uncontrolled and the original online version should be referred to for the latest version. Cisco SD-WAN Migration Guide July 23, 2019 Version 1 July 23, 2019 Cisco SD-WAN Migration Guide Page 2 of 55 Contents CONTENTS ..2 LIST OF FIGURES AND TABLES ..4 ABOUT THIS Guide ..7 7 7 1 INTRODUCTION ..8 8 DOCUMENT SCOPE .. 8 ASSUMPTIONS AND CONSIDERATIONS.

2 8 RELATED DOCUMENTS .. 8 2 PROJECT OVERVIEW ..9 Cisco SOLUTION OVERVIEW .. 9 SD-WAN Layered Design .. 10 Cisco SD-WAN CONTROLLERS .. 11 vManage 11 vSmart Overview .. 12 vBond Overview .. 12 Cisco SD-WAN ROUTERS .. 12 Upgrading IOS-XE Routers to 14 3 Migration PLANNING .. 15 Migration CONSIDERATIONS .. 15 Controller Considerations .. 15 Datacenter 15 Region/Branch Considerations .. 15 DEPLOYMENT STAGES .. 16 SEQUENCE OF MIGRATIONS .. 16 SMART ACCOUNT AND VIRTUAL ACCOUNT .. 17 DEPLOYING CONTROLLERS.

3 19 Firewall Traffic Requirements .. 19 High Availability and Scalability of Controllers .. 19 July 23, 2019 Cisco SD-WAN Migration Guide Page 3 of 55 SD-WAN CONFIGURATION TEMPLATES AND POLICIES .. 20 System IP .. 20 Site ID .. 20 Port Numbering and Mapping .. 21 Color .. 22 Segmentation .. 22 Migrating IOS-XE Configuration to SD-WAN .. 23 Configurations Template .. 23 4 Migration 25 DATACENTER Migration .. 25 Legacy DC Migration .. 25 IWAN DC Migration to SD-WAN .. 28 BRANCH Migration .

4 30 Single Router Branch Migration .. 30 Inline Branch Migration .. 32 Parallel Branch Migration .. 33 5 Migration CASE STUDY .. 38 GETTING READY .. 38 TOPOLOGY .. 39 Migration STEPS .. 40 Smart Account .. 40 Controller 40 Datacenters Migration .. 40 Branch 1 Migration .. 45 Branch 2 Migration .. 48 Legacy WAN Branch 3 Migration .. 51 Branch 4 Migration .. 54 Phase out DC IWAN BRs .. 55 July 23, 2019 Cisco SD-WAN Migration Guide Page 4 of 55 List of Figures and Tables FIGURE 1: Cisco SD-WAN ARCHITECTURE.

5 9 FIGURE 2: Cisco SD-WAN LAYERED ARCHITECTURE .. 10 FIGURE 3: SD-WAN CONTROLLERS HOSTING MODELS .. 11 FIGURE 4: THE Cisco SD-WAN ROUTER FAMILY .. 13 FIGURE 5: IOS-XE UPGRADE TO SD-WAN .. 14 FIGURE 6: DEPLOYMENT/ Migration STAGES .. 16 FIGURE 7: Migration SEQUENCE .. 16 FIGURE 8: BOOTSTRAP PROCESS .. 18 FIGURE 9: CONTROL PLANE SCALABILITY .. 20 FIGURE 10: Cisco SD-WAN ARCHITECTURE .. 23 FIGURE 11: CONFIGURATION CONVERSION TOOL .. 23 FIGURE 12: DATACENTER SD-WAN EDGES BEHIND CE ROUTERS .. 25 FIGURE 13: SD-WAN BEHIND CES WITH IWAN BRS.

6 28 FIGURE 14: SINGLE ROUTER BRANCH Migration ROUTING .. 31 FIGURE 15: INLINE BRANCH DEPLOYMENT .. 32 FIGURE 16: PARALLEL BRANCH DEPLOYMENT UNDERLAY/OVERLAY .. 34 FIGURE 17: PARALLEL BRANCH DEPLOYMENT WITH SERVICES .. 36 FIGURE 18: LEGACY WAN TOPOLOGY .. 39 FIGURE 19: IWAN TOPOLOGY .. 39 FIGURE 20: MIGRATING LEGACY DCS - SD-WAN EDGE ROUTERS PLACEMENT .. 40 FIGURE 21: MIGRATING IWAN DC1 - SD-WAN EDGE ROUTERS PLACEMENT .. 42 FIGURE 22: MIGRATING IWAN DC1 - ROUTING DURING Migration .. 43 FIGURE 23: MIGRATING IWAN DC2 - ROUTING DURING Migration .

7 45 FIGURE 24: MIGRATING LEGACY BRANCH 1 TO SD-WAN .. 46 FIGURE 25: MIGRATING IWAN BRANCH 1 TO SD-WAN .. 46 FIGURE 26: MIGRATING BRANCH 1 ROUTING .. 47 FIGURE 27: MIGRATING LEGACY WAN BRANCH 2 .. 48 FIGURE 28: MIGRATING IWAN BRANCH 2 .. 49 FIGURE 29: MIGRATING BRANCH 2 ROUTING .. 49 FIGURE 30: MIGRATING LEGACY BRANCH 3 .. 51 July 23, 2019 Cisco SD-WAN Migration Guide Page 5 of 55 FIGURE 31: PARALLEL BRANCH Migration ROUTING .. 51 FIGURE 32: MIGRATING IWAN BRANCH 3 .. 53 FIGURE 33: MIGRATING LEGACY WAN BRANCH 4.

8 54 FIGURE 34: MIGRATING IWAN BRANCH 4 .. 54 FIGURE 35: IWAN DC BRS AND CONTROLLERS REMOVED .. 55 TABLE 1: DOCUMENT HISTORY .. 7 TABLE 2 : DOCUMENT REVIEWERS .. 7 TABLE 3: SUMMARY OF THE Cisco SD-WAN COMPONENTS .. 10 TABLE 4: Cisco SD-WAN EDGE ROUTER FAMILY .. 13 TABLE 5: SD-WAN FIREWALL TRAFFIC REQUIREMENT .. 19 TABLE 6: SD-WAN SITE-ID PLANNING .. 21 TABLE 7: SD-WAN EDGE VPN TYPES .. 22 TABLE 8: SD-WAN EDGE ROUTERS CONNECTIVITY BEHIND CE ROUTERS .. 26 TABLE 9: CE ROUTERS CONNECTIVITY IN FRONT OF SD-WAN 27 TABLE 10: DATACENTER CORE ROUTERS CONNECTIVITY.

9 27 TABLE 11: SD-WAN EDGE ROUTERS CONNECTIVITY BEHIND CE ROUTERS (IWAN DC) .. 29 TABLE 12: CE ROUTERS CONNECTIVITY IN FRONT OF SD-WAN ROUTERS (IWAN DC) .. 29 TABLE 13: IWAN: DC1 IWAN ROUTERS CONNECTIVITY AND ROUTING .. 29 TABLE 14: DATACENTER CORE ROUTERS CONNECTIVITY (IWAN DC) .. 30 TABLE 15: BRANCH 1 SD-WAN ROUTERS CONNECTIVITY AND ROUTING .. 32 TABLE 16: BRANCH INLINE 33 TABLE 17: BRANCH SD-WAN EDGE ROUTER IN PARALLEL DEPLOYMENT UNDERLAY/OVERLAY .. 35 TABLE 18: BRANCH CE ROUTER CONNECTIVITY IN PARALLEL DEPLOYMENT UNDERLAY/OVERLAY.

10 35 TABLE 19: BRANCH LAN SWITCH CONNECTIVITY IN PARALLEL DEPLOYMENT UNDERLAY/OVERLAY .. 36 TABLE 20: BRANCH SD-WAN EDGE ROUTER IN PARALLEL DEPLOYMENT WITH SERVICES .. 37 TABLE 21: BRANCH CE ROUTER CONNECTIVITY IN PARALLEL DEPLOYMENT WITH SERVICES .. 37 TABLE 22: IWAN & SD-WAN ARCHITECTURES .. 38 TABLE 23: SD-WAN EDGE ROUTERS CONNECTIVITY BEHIND CE ROUTERS .. 41 TABLE 24: CE ROUTERS CONNECTIVITY IN FRONT OF SD-WAN EDGE ROUTERS .. 41 TABLE 25: DATACENTER CORE ROUTERS CONNECTIVITY .. 42 TABLE 26: IWAN: DC1 SD-WAN EDGE ROUTERS CONNECTIVITY AND ROUTING.