Create Transit Gateway with Peering between Regions | Scribe

    Create Transit Gateway with Peering between Regions

    • Durgaprasad A |
    • 135 steps |
    • 6 minutes

    Creating Transit Gateways

    1
    I created 2 VPC's in the same region ( each vpc has - 2 public , 2 private subnets , 1 public and 1 private route table ) \ After that click on transit gateway
    2
    Creating 1st Transit Gateway
    3
    Enter Transit Gateway name and Description
    4
    UnCheck Default Route table association and Default route table propagationThis gives more control on routing
    UnCheck Default Route table association and Default route table propagationThis gives more control on routing
    5
    A CIDR for the transit gateway must be provided . This must be unique to VPC CIDR of all the transit gateway attachment VPC's
    6
    Since in this case VPC CIDR start with 10 and 172 . I choose CIDR with 192
    7
    Click "Create transit gateway"
    8
    Click "Create transit gateway" to create 2nd Transit Gateway
    9
    Enter Transit Gateway name and Description
    10
    Disable route table association and propagation
    11
    Provide the CIDR for new transit gateway . Keep this unique to that of other transit gateway
    12
    Click "Create transit gateway"

    Creating Transit Gateway Attachments

    13
    Create Transit Gateway Attachments with each of the VPC's . Project1 VPC is attached to Transit Gateway 1
    14
    Click "Create transit gateway attachment"
    15
    Click "tgw-0c6c9842be062ee49 (transit-gateway-region1)" ( choose the transit Gateway and type of attachment since we are attaching to VPC it's of type VPC
    16
    Select the VPC . for transit gateway 1 the vpc is project1-vpc . When selected we are prompted to selected subnets . Select atleast one subnet from each AZ . This enables transit gateway to reach the resources in that AZ
    17
    Click "Create transit gateway attachment"
    18
    Create Transit Gateway Attachments with each of the VPC's . Project2 VPC is attached to Transit Gateway 2