I have a VPC A(say 192.168.0.0/22) and VPC B and C having CIDRs 10.0.0.0/16. A VPC peering from A to B already exists (say pcx 1). And have to establish another VPC peering from A to C (say pcx 2). In Order to do that I attached another CIDR block (10.1.0.0/16) to VPC C, and added a new peering connection from A to C (pcx 2). A public subnet with an EC2 instance exists in each of the VPCs.
In the route table of public subnet of VPC A :
- Destination---------Target
- 10.0.0.0/16 ---------- pcx 1
- 10.1.0.0/16 ---------- pcx 2
Route table public subnet of VPC B:
- Destination ---------- Target
- 192.168.0.0/22--------pcx 1
Route table public subnet of VPC C:
Destination --------- Target
192.168.0.0/22--------pcx 2
The security group associated with each of the EC2 instance in VPC A allows all ICMP-IPv4 traffic from 10.0.0.0/16 and 10.1.0.0/16
Similarly EC2 in VPCs B and C, allows all ICMP-IPv4 traffic from 192.168.0.0/22.
The connection between VPC A and VPC C is not working. I'm new to AWS and can't understand why its failing. Can anyone tell what I did wrong? Any help is accepted :)