Update the security group associated with eni-0596e500l23456789 to permit inbound traffic

Update the security group associated with eni-059€«500i234 56~89 to permit outbound traffic

Update the network ACL associated with the subnet to permit inbound traffic

Update the network ACL associated with the subnet to permit outbound traffic

The VGW is not advertising the correct CIDR range back on-premises.

The instance security group does not allow ICMP traffic.

A public virtual interface must be configured for Amazon EC2 connectivity.

The on-premises router is not advertising the correct CIDR range to AWS.

There is a misconfiguration of the bi-directional forwarding detection.

The customer performs Q-in-Q tunneling, with the AWS-required VLAN tag in the inside and VLAN 100 as the outside tag.

Create a support ticket with AWS to request the removal of the outer VLAN tag 100 as the traffic reaches AWS routers.

Send the traffic for all VPCs with the same VLAN tag 100 and use BGP to ensure that proper routing takes place to the appropriate VPC.

ABC Telecom removes the other tag before sending the packet to AWS.

ABC Telecom creates a support ticket with AWS to exchange MPLS labels and include the AWS port as part of their MPLS network.