Transit Gateway is 1 to 1 relationship with VPC.
1 VPC can only have 1 Transit Gateway
1. Create Transit Gateway:
Step 1: Remove the peering connection from Route Tables and also delete the peering connection
Step 2: Select Transit Gateway From VPC left panel option.
Step 3: Click on Create Transit Gateway.
Step 4: Define the following properties
- Name: irfan-tsgw
- Rest of the properties are same
- Click on Create Transit Gateway
Step 1: Create the transit gateway attachments by selecting Transit Gateway Attachment link.
Step 2: Click on Create Transit Gateway button.
Step 3: Provide following details.
- Name: irfan-tsgwattch
- Transit Gateway: irfan-tsgw
- Attachment Type: VPC
- select VPC : irfan-vpc-pn-1
- Click on Create Transit Gateway attachment.
Step 4: Repeat Step 3 for irfan-vpc-pn-2
Step 5: Update Route tables of each VPC by adding CIDR range of other VPCs and connection type should be Transit Gateway.
Step 6: Create EC2 instances in each VPC and you will find that they can communicate to each other with a private network.
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