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© 2020, Amazon Web Services, Inc. or its Affiliates.
AWSTransit Gateway
Benefits and Best Practices
Nitin Ashok - Technical Account Manager, AWS
Rodrigo Balan - Technical Account Manager, AWS
© 2018, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
Agenda
• Motivation for AWS Transit Gateway
• Key Features and Benefits
• Common Use Cases
• Sample Reference Architecture
• Transit Gateway Network Manager
• Best Practices
© 2018, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
Motivation for AWS Transit Gateway
© 2020, Amazon Web Services, Inc. or its Affiliates.
What do customers want to do?
Interconnect VPCs and
on-prem networks
Globally scale out
connectivity across regions
Simplify network
configuration and
management
© 2020, Amazon Web Services, Inc. or its Affiliates.
What challenges are they facing?
Complex point-to-point
peering does not scale
VPN Bandwidth limitations Monitoring and
Management of routing
configurations is time
consuming
© 2020, Amazon Web Services, Inc. or its Affiliates.
VPN connectionCustomer
gateway
AmazonVPC AmazonVPC
AWS Direct Connect
Gateway
VPC peering
VPC peering VPC peering
AmazonVPC AmazonVPCVPC peering
VPN
connection
VPN connection
VPC peering
Before AWSTransit Gateway
© 2020, Amazon Web Services, Inc. or its Affiliates.
Before AWSTransit Gateway
VPN
WAN
AWS Direct
Connect
Transit VPC
Dev Prod Dev Prod Dev Prod
Dev Prod Dev Prod Dev Prod
© 2020, Amazon Web Services, Inc. or its Affiliates.
Introducing AWSTransit Gateway
Easily interconnect thousands of
VPCs and on-premise networks
On-Premise
Data Center
AWSVPCAWSTransit
Gateway
© 2020, Amazon Web Services, Inc. or its Affiliates.
AWSTransit
Gateway
AmazonVPCAmazonVPC
AmazonVPCAmazonVPC
Customer
gateway
VPN
connection
AWS Direct
Connect Gateway
With AWSTransit Gateway
© 2020, Amazon Web Services, Inc. or its Affiliates.
Key Features and Benefits
© 2020, Amazon Web Services, Inc. or its Affiliates.
AWSTransit
Gateway
Centralized routing polices acrossVPCs and on-premises
Scales to support thousands ofVPCs across multiple accounts
Flexible segmentation and routing rules
Horizontally scalable
Increase connectivity throughput with multiple VPN connections
Simplified management and network visibility
PeerTransit Gateways to provide inter-region VPC connectivity
AWSTransit Gateway: Key Features
Route Multicast traffic betweenVPCs in the same region
© 2020, Amazon Web Services, Inc. or its Affiliates.
• Centrally interconnect multipleVPCs across accounts
• One central connection point forVPN and Direct Connect
• Reduce or eliminate need for peer to peer networking
• IncreaseVPN throughput via ECMP routing
• Peer AWSTransit Gateway across regions
• Leverage the AWS Global Network for low latency cross-region
connectivity
• Regional construct reduces blast radius
• Reduces time to configure on-premises connectivity to AWS
• Easily monitor and manage from a central point
• Integrated with CloudWatch andVPC Flow Logs
• Leverage existingVPC security groups and network access control lists
• Centrally manage the networks built aroundTransit Gateways using
Transit Gateway Network Manager
Simplified
Networking
Global
Connectivity
Easy
Manageability
AWSTransit Gateway: Benefits
© 2020, Amazon Web Services, Inc. or its Affiliates.
Common Use Cases
© 2020, Amazon Web Services, Inc. or its Affiliates.
Use Case – Interconnecting Geographically Dispersed On-
Premise andVPC resources
• Customer with multipleVPCs
• Build applications that span a large number of
VPCs
• Share network services (DNS, Active
Directory, Firewall, IDS)
• Reduce management overhead
© 2020, Amazon Web Services, Inc. or its Affiliates.
Use Case – Edge Consolidation
• Share a commonVPN or Direct
Connect Gateway (DXGW) across VPCs
• Reduce time to connect on-premises
resources to multipleVPCs
• No additional customer network
changes required when adding aVPC
to AWSTransit Gateway
© 2020, Amazon Web Services, Inc. or its Affiliates.
Use Case – Digital security and threat intelligence
• SharedVPC hosts security tools
• Web application Firewall (WAF), Data
Loss Prevention (DLP), Intrusion
Detection / Protection (IDS/IPS)
• Scales out over native AWS Services
© 2020, Amazon Web Services, Inc. or its Affiliates.
Sample Reference Architecture
© 2020, Amazon Web Services, Inc. or its Affiliates.
Development Production
Internet
Outbound
URL filtering
NAT gateway
DLP / Proxy
Edge services
WAF / ADC
SD-WAN
VPN / Firewall
IDS / IPS
Firewall / NGFW
Inline services
Shared services
Authentication &
Monitoring
VPN Direct Connect
Account Account Account Account
Administrative accounts
(logging, AWS Organizations,
billing, landing zone)
IAM, Cross-account roles
Route
tables
Route
tables
Transit Gateway
East-West +
North-South
AWSTransit Gateway Reference Architecture
Testing
VPC VPC VPC VPC
VPC
VPC
VPC
© 2020, Amazon Web Services, Inc. or its Affiliates.
Transit Gateway Network Manager
© 2020, Amazon Web Services, Inc. or its Affiliates.
AWSTransit Gateway: Network Manager
Benefits ofTransit Gateway Network Manager
• Centralize management and monitoring of
networking resources and connections to
remote branch offices
• Define, visualize and manage networks
globally
• Use Route Analyzer to verify routing
configurations
• Integrate with third party SD-WAN solutions
including Cisco, Aruba, Silver Peak and
Aviatrix
• No additional fees for usingTransit Gateway
Network Manager
© 2020, Amazon Web Services, Inc. or its Affiliates.
Best Practices
© 2020, Amazon Web Services, Inc. or its Affiliates.
Best Practices: Migrate fromTransitVPC to AWSTransit
Gateway
TGW MigratorTool:
• Provides a seamless migration path from the transitVPC solution to AWSTransit Gateway.
Prerequisites:
• TheVPCs cannot have overlapping CIDRs
• You cannot have identical routes pointing to two differentVPCs
• Verify that you have permissions required to work with transit gateways
© 2020, Amazon Web Services, Inc. or its Affiliates.
Best Practices: AWSTransit gateway design best practices –
Part 1
• Limit the number of transit gateway route tables unless
your design requires multiple transit gateway route tables
• You do not need additional transit gateways for high
availability, because transit gateways are highly available
by design
• Enable route propagation forAWS Direct Connect gateway
attachments and BGP Site-to-SiteVPN attachments
• Use Border Gateway Protocol (BGP) Site-to-SiteVPN
connections. If your customer gateway device or firewall
for the connection supports multipath, enable the feature
© 2020, Amazon Web Services, Inc. or its Affiliates.
Best Practices: AWSTransit gateway design best practices –
Part 2
• Use a separate subnet for each transit gatewayVPC
attachment
• Create one network ACL and associate it with all of the
subnets that are associated with the transit gateway
• Associate the sameVPC route table with all of the subnets
that are associated with the transit gateway
• For multiple Region deployments, we recommend that you
use a unique Autonomous System Number (Amazon-side
ASN) for each of your transit gateways
© 2020, Amazon Web Services, Inc. or its Affiliates.
Further reading (blog post)
• Zendesk’s Global Mesh Network: How we lowered operational overhead and cost by
migrating to AWS Transit Gateway
• Working with Route Tables in AWS Transit Gateway
• Scaling VPN throughput using AWS Transit Gateway
• Automating AWS Transit Gateway attachments to a transit gateway in a central account
• Advanced Troubleshooting with AWS Transit Gateway Network Manager Route Analyzer
• Migrate from Transit VPC to AWS Transit Gateway

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AWS Transit Gateway-Benefits and Best Practices

  • 1. © 2020, Amazon Web Services, Inc. or its Affiliates. AWSTransit Gateway Benefits and Best Practices Nitin Ashok - Technical Account Manager, AWS Rodrigo Balan - Technical Account Manager, AWS
  • 2. © 2018, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Agenda • Motivation for AWS Transit Gateway • Key Features and Benefits • Common Use Cases • Sample Reference Architecture • Transit Gateway Network Manager • Best Practices
  • 3. © 2018, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Motivation for AWS Transit Gateway
  • 4. © 2020, Amazon Web Services, Inc. or its Affiliates. What do customers want to do? Interconnect VPCs and on-prem networks Globally scale out connectivity across regions Simplify network configuration and management
  • 5. © 2020, Amazon Web Services, Inc. or its Affiliates. What challenges are they facing? Complex point-to-point peering does not scale VPN Bandwidth limitations Monitoring and Management of routing configurations is time consuming
  • 6. © 2020, Amazon Web Services, Inc. or its Affiliates. VPN connectionCustomer gateway AmazonVPC AmazonVPC AWS Direct Connect Gateway VPC peering VPC peering VPC peering AmazonVPC AmazonVPCVPC peering VPN connection VPN connection VPC peering Before AWSTransit Gateway
  • 7. © 2020, Amazon Web Services, Inc. or its Affiliates. Before AWSTransit Gateway VPN WAN AWS Direct Connect Transit VPC Dev Prod Dev Prod Dev Prod Dev Prod Dev Prod Dev Prod
  • 8. © 2020, Amazon Web Services, Inc. or its Affiliates. Introducing AWSTransit Gateway Easily interconnect thousands of VPCs and on-premise networks On-Premise Data Center AWSVPCAWSTransit Gateway
  • 9. © 2020, Amazon Web Services, Inc. or its Affiliates. AWSTransit Gateway AmazonVPCAmazonVPC AmazonVPCAmazonVPC Customer gateway VPN connection AWS Direct Connect Gateway With AWSTransit Gateway
  • 10. © 2020, Amazon Web Services, Inc. or its Affiliates. Key Features and Benefits
  • 11. © 2020, Amazon Web Services, Inc. or its Affiliates. AWSTransit Gateway Centralized routing polices acrossVPCs and on-premises Scales to support thousands ofVPCs across multiple accounts Flexible segmentation and routing rules Horizontally scalable Increase connectivity throughput with multiple VPN connections Simplified management and network visibility PeerTransit Gateways to provide inter-region VPC connectivity AWSTransit Gateway: Key Features Route Multicast traffic betweenVPCs in the same region
  • 12. © 2020, Amazon Web Services, Inc. or its Affiliates. • Centrally interconnect multipleVPCs across accounts • One central connection point forVPN and Direct Connect • Reduce or eliminate need for peer to peer networking • IncreaseVPN throughput via ECMP routing • Peer AWSTransit Gateway across regions • Leverage the AWS Global Network for low latency cross-region connectivity • Regional construct reduces blast radius • Reduces time to configure on-premises connectivity to AWS • Easily monitor and manage from a central point • Integrated with CloudWatch andVPC Flow Logs • Leverage existingVPC security groups and network access control lists • Centrally manage the networks built aroundTransit Gateways using Transit Gateway Network Manager Simplified Networking Global Connectivity Easy Manageability AWSTransit Gateway: Benefits
  • 13. © 2020, Amazon Web Services, Inc. or its Affiliates. Common Use Cases
  • 14. © 2020, Amazon Web Services, Inc. or its Affiliates. Use Case – Interconnecting Geographically Dispersed On- Premise andVPC resources • Customer with multipleVPCs • Build applications that span a large number of VPCs • Share network services (DNS, Active Directory, Firewall, IDS) • Reduce management overhead
  • 15. © 2020, Amazon Web Services, Inc. or its Affiliates. Use Case – Edge Consolidation • Share a commonVPN or Direct Connect Gateway (DXGW) across VPCs • Reduce time to connect on-premises resources to multipleVPCs • No additional customer network changes required when adding aVPC to AWSTransit Gateway
  • 16. © 2020, Amazon Web Services, Inc. or its Affiliates. Use Case – Digital security and threat intelligence • SharedVPC hosts security tools • Web application Firewall (WAF), Data Loss Prevention (DLP), Intrusion Detection / Protection (IDS/IPS) • Scales out over native AWS Services
  • 17. © 2020, Amazon Web Services, Inc. or its Affiliates. Sample Reference Architecture
  • 18. © 2020, Amazon Web Services, Inc. or its Affiliates. Development Production Internet Outbound URL filtering NAT gateway DLP / Proxy Edge services WAF / ADC SD-WAN VPN / Firewall IDS / IPS Firewall / NGFW Inline services Shared services Authentication & Monitoring VPN Direct Connect Account Account Account Account Administrative accounts (logging, AWS Organizations, billing, landing zone) IAM, Cross-account roles Route tables Route tables Transit Gateway East-West + North-South AWSTransit Gateway Reference Architecture Testing VPC VPC VPC VPC VPC VPC VPC
  • 19. © 2020, Amazon Web Services, Inc. or its Affiliates. Transit Gateway Network Manager
  • 20. © 2020, Amazon Web Services, Inc. or its Affiliates. AWSTransit Gateway: Network Manager Benefits ofTransit Gateway Network Manager • Centralize management and monitoring of networking resources and connections to remote branch offices • Define, visualize and manage networks globally • Use Route Analyzer to verify routing configurations • Integrate with third party SD-WAN solutions including Cisco, Aruba, Silver Peak and Aviatrix • No additional fees for usingTransit Gateway Network Manager
  • 21. © 2020, Amazon Web Services, Inc. or its Affiliates. Best Practices
  • 22. © 2020, Amazon Web Services, Inc. or its Affiliates. Best Practices: Migrate fromTransitVPC to AWSTransit Gateway TGW MigratorTool: • Provides a seamless migration path from the transitVPC solution to AWSTransit Gateway. Prerequisites: • TheVPCs cannot have overlapping CIDRs • You cannot have identical routes pointing to two differentVPCs • Verify that you have permissions required to work with transit gateways
  • 23. © 2020, Amazon Web Services, Inc. or its Affiliates. Best Practices: AWSTransit gateway design best practices – Part 1 • Limit the number of transit gateway route tables unless your design requires multiple transit gateway route tables • You do not need additional transit gateways for high availability, because transit gateways are highly available by design • Enable route propagation forAWS Direct Connect gateway attachments and BGP Site-to-SiteVPN attachments • Use Border Gateway Protocol (BGP) Site-to-SiteVPN connections. If your customer gateway device or firewall for the connection supports multipath, enable the feature
  • 24. © 2020, Amazon Web Services, Inc. or its Affiliates. Best Practices: AWSTransit gateway design best practices – Part 2 • Use a separate subnet for each transit gatewayVPC attachment • Create one network ACL and associate it with all of the subnets that are associated with the transit gateway • Associate the sameVPC route table with all of the subnets that are associated with the transit gateway • For multiple Region deployments, we recommend that you use a unique Autonomous System Number (Amazon-side ASN) for each of your transit gateways
  • 25. © 2020, Amazon Web Services, Inc. or its Affiliates. Further reading (blog post) • Zendesk’s Global Mesh Network: How we lowered operational overhead and cost by migrating to AWS Transit Gateway • Working with Route Tables in AWS Transit Gateway • Scaling VPN throughput using AWS Transit Gateway • Automating AWS Transit Gateway attachments to a transit gateway in a central account • Advanced Troubleshooting with AWS Transit Gateway Network Manager Route Analyzer • Migrate from Transit VPC to AWS Transit Gateway

Editor's Notes

  1. Monitoring: Use Amazon CloudWatch metrics and events to monitor your networks Respond to connectivity issues: Network Manager provides you with event notifications from a single interface so that you can get a global view of what is happening on your network. You can identify and troubleshoot network problems faster than if you received the information from different tools. Global view – See network activity in many locations from one single dashboard. You can compare activity and identify inconsistencies between on-premises locations and the AWS cloud, or issues that affect several locations differently. Route Analyzer: Verify that the transit gateway route table configuration will work as expected before you start sending traffic. Validate your existing route configuration. Diagnose route-related issues that are causing traffic disruption in your global network. SD-WAN: Automatically create AWS Site-to-Site VPN connections using SD-WAN management consoles