Establishing network connectivity between two or more cloud networks (VPC Stitching)

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Updated at July 14, 2025

Warning

This function will only be available if Cloud Interconnect is activated.

The network topology is presented on the diagram in the following configuration:

From the Yandex Cloud side, the Routing Instance is connected to by virtual network Net-1 comprised of six subnets: subnet-a1, subnet-a2, subnet-b1, subnet-b2, subnet-d1, and subnet-d2. The information about the subnets' IP prefixes is added to RI.
From the Yandex Cloud side, the Routing Instance is connected to by virtual network Net-2 comprised of six subnets: subnet-a3, subnet-a4, subnet-b3, subnet-b4, subnet-d3, and subnet-d4. The information about the subnets' IP prefixes is added to RI.
For network connectivity between virtual networks Net-1 and Net-2, a special private vpc-stitching connection is created in the Routing Instance. This private connection terminates on Yandex Cloud network equipment.
To achieve network connectivity between virtual networks Net-1 and Net-2 for the vpc-stitching private connection, you need to configure stitching announcements for the CIDRs of the corresponding subnets in virtual networks Net-1 and Net-2.

Important note

Virtual network subnets' own prefixes cannot be used as stitching announcements.