Courses / AWS
68. Transit Gateway route propagation
Automatic or manual propagation of attachment routes into TGW route tables and how propagation affects reachability.
AWS (cloud infrastructure)
Transit Gateway route propagation
A TGW route propagation setting automatically adds routes from attachments into a Transit Gateway route table so attached networks can reach each other.
"I attached a VPC and an AWS Site-to-Site VPN to my Transit Gateway — why can't they talk even though both are attached?"
Route propagation controls whether route entries learned from a specific TGW attachment are automatically inserted into a Transit Gateway route table; if propagation is off, you must add routes manually for reachability.
"I attached a VPC and an AWS Site-to-Site VPN to my Transit Gateway — why can't they talk even though both are attached?"
Route propagation controls whether route entries learned from a specific TGW attachment are automatically inserted into a Transit Gateway route table; if propagation is off, you must add routes manually for reachability.