Question

Your company runs a Cloud Router with a BGP session to an on-premises router over HA VPN. By default the Cloud Router advertises all subnets in the VPC. The network team now wants the Cloud Router to advertise only a single aggregate prefix (10.100.0.0/16) that summarizes several subnets, plus the range for a Private Google Access endpoint (199.36.153.8/30), while suppressing individual subnet advertisements. What should you configure on the Cloud Router?

Accepted Answer

Set the Cloud Router advertisement mode to custom, and add both 10.100.0.0/16 and 199.36.153.8/30 as custom IP ranges.

Answer

Keep the default (base) advertisement mode and add the two prefixes as custom routes on the BGP peer.

Answer

Set the advertisement mode to custom and enable 'Advertise all subnets' while adding 199.36.153.8/30 as a custom range.

Answer

Create custom static routes in the VPC for the two prefixes so the Cloud Router propagates them automatically.