Modify a prefix list reference using Amazon VPC Transit Gateways - Amazon VPC
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Modify a prefix list reference using Amazon VPC Transit Gateways

You can modify a prefix list reference by changing the attachment that the traffic is routed to, or indicating whether to drop traffic that matches the route.

You cannot modify the individual routes for a prefix list in the Routes tab. To modify the entries in the prefix list, use the Managed Prefix Lists screen. For more information, see Modifying a prefix list in the Amazon VPC User Guide.

To modify a prefix list reference using the console
  1. Open the Amazon VPC console at https://console.amazonaws.cn/vpc/.

  2. In the navigation pane, choose Transit Gateway Route Tables.

  3. Select the transit gateway route table.

  4. In the lower pane, choose Prefix list references.

  5. Choose the prefix list reference, and choose Modify references.

  6. For Type, choose if traffic to this prefix list should be allowed (Active) or dropped (Blackhole).

  7. For Transit gateway attachment ID, choose the ID of the attachment to which to route traffic.

  8. Choose Modify prefix list reference.

To modify a prefix list reference using the Amazon CLI

Use the modify-transit-gateway-prefix-list-reference command.