Here is a detailed summary of the video transcription in Markdown format, with the key takeaways broken down into sections for better readability:
Fundamentals of Routing on AWS
- Route: A destination and the path (next hop) to get there
- Routing Information Base (RIB) vs Forwarding Information Base (FIB)
- AWS Routing Components:
- Static routes: Manually configured by the administrator
- Propagated routes: Automatically propagated based on the existence of a route elsewhere
- Dynamic routes: Usually using Border Gateway Protocol (BGP)
- Route Preference Order: Static > Propagated > Dynamic (except for more specific dynamic routes)
Routing within a Single VPC
- Comparison of on-premises and AWS networking constructs
- Subnets and route tables: Allowing granular control over routing within a VPC
- Ingress routing: Redirecting traffic coming into the VPC through a network function (e.g., firewall)
- More specific routing: Overriding local route behavior for traffic between subnets
Resilience in Static Routing
- Targeting highly available resources (e.g., NAT Gateway, Network Firewall, Transit Gateway)
- Using AWS Gateway Load Balancer for self-hosted solutions
Connecting to On-Premises with Direct Connect and VPN
- Connecting a VPC to an on-premises data center using Direct Connect and VPN
- Propagating routes dynamically vs. using static routes
- Failover and resiliency using BGP with Bidirectional Forwarding Detection (BFD)
Connectivity Between Multiple VPCs
- Using AWS Transit Gateway for VPC-to-VPC connectivity
- Propagating routes dynamically and creating route tables for Transit Gateway attachments
- Inserting network functions (e.g., firewalls) between VPCs using Transit Gateway
Multi-Region Connectivity and Inspection
- Expanding to multiple regions using Transit Gateway peerings
- Performing inspection between regions using multiple route tables
AWS Cloud WAN for Multi-Region Networking
- Core Network Edge (CNE): Managed regional routing component
- Segments: Global routing domains
- Policies: Defining intent for networking configuration
- Single-hop vs. dual-hop inspection
Hybrid Connectivity and Load Balancing
- Redundancy in Direct Connect connections across locations
- Providing connectivity from on-premises to S3 using public virtual interfaces
- Connecting on-premises to VPCs using private virtual interfaces
- Influencing traffic paths using BGP attributes (AS-path prepending, local preference)