hybrid-cloud-networking

1# Hybrid Cloud Networking
2 
3Configure secure, high-performance connectivity between on-premises and cloud environments using VPN, Direct Connect, ExpressRoute, Interconnect, and FastConnect.
4 
5## Purpose
6 
7Establish secure, reliable network connectivity between on-premises data centers and cloud providers (AWS, Azure, GCP, OCI).
8 
9## When to Use
10 
11- Connect on-premises to cloud
12- Extend datacenter to cloud
13- Implement hybrid active-active setups
14- Meet compliance requirements
15- Migrate to cloud gradually
16 
17## Connection Options
18 
19### AWS Connectivity
20 
21#### 1. Site-to-Site VPN
22 
23- IPSec VPN over internet
24- Up to 1.25 Gbps per tunnel
25- Cost-effective for moderate bandwidth
26- Higher latency, internet-dependent
27 
28```hcl
29resource "aws_vpn_gateway" "main" {
30  vpc_id = aws_vpc.main.id
31  tags = {
32    Name = "main-vpn-gateway"
33  }
34}
35 
36resource "aws_customer_gateway" "main" {
37  bgp_asn    = 65000
38  ip_address = "203.0.113.1"
39  type       = "ipsec.1"
40}
41 
42resource "aws_vpn_connection" "main" {
43  vpn_gateway_id      = aws_vpn_gateway.main.id
44  customer_gateway_id = aws_customer_gateway.main.id
45  type                = "ipsec.1"
46  static_routes_only  = false
47}
48```
49 
50#### 2. AWS Direct Connect
51 
52- Dedicated network connection
53- 1 Gbps to 100 Gbps
54- Lower latency, consistent bandwidth
55- More expensive, setup time required
56 
57**Reference:** See `references/direct-connect.md`
58 
59### Azure Connectivity
60 
61#### 1. Site-to-Site VPN
62 
63```hcl
64resource "azurerm_virtual_network_gateway" "vpn" {
65…