Moving to Transit Gateways
This new model scraps the traditional shared services networking and peering connec-
tions, and puts a smart new box called the transit gateway in the middle of the network.
The transit gateway connects to the customer network, shared services and all the
spokes in the network, providing that centralized management structure that modern
cloud environments need. Transit gateways are relatively new. AWS released its own
version several months ago that can attach each gateway to as many as 5,000 Amazon
Virtual Private Clouds (VPCs). Each attachment can handle up to 50 Gbits/second of
bursty traffic. There are also a number of third-party solutions on the market, including
Cisco CSR, Aviatrix and VMware NSX. These solutions let you manage routing on a
grand scale, clearing the way for a more efficient brand of multi-cloud networking.
VPN
VPN
Gateway
Transit
Gateway
Shared
Services
Spoke 1
Spoke 2
Spoke 3
Spoke n
Figure 2: A single-cloud configuration using a transit gateway
SUMMER 2019 | THE DOPPLER | 21