Cloud Interconnect

• Cloud Interconnect ans Peering services available in GCP:

	Dedicated	Shared
Layer 3	Direct Peering	Carrier Peering
Layer 2	Dedicated Interconnect	Partner Interconnect

Dedicated Interconnect

• Provides direct physical connections between on-premises networks and Google’s networks
• Enables transfer of large amount of data between on-premises and GCP
• For using it we nee to provision a Cross Connect between on-premises router and Google Network in a common colocation facility
• Dedicated Interconnect can be configured to provide a 99.9% or 99.999% SLA
• In order to use Dedicated Interconnect, our own network has to physically meet Google’s network in a supported colocation facility

Partner Interconnect

• Provides connectivity between on-premises network and Google network through a supported service provider
• Recommended if our facility is geographically far away from a colocation facility or if our data transfer requirements don’t warrant a Dedicated Interconnect
• Service provider has physical connectivity to GCP which is provided as a service to customers

Comparison of Interconnect options

• IPsec VPN tunnel:
  • Encrypted tunnel to VPC through the public internet
  • 1.5 - 3 Gbps per tunnel
• Dedicated Interconnect:
  • Dedicated, direct connections to VPC networks
  • 10 Gbps per link or 100 Gbps
• Partner Interconnect:
  • Dedicated bandwidth connections to VPC network through a service provider
  • 50 Mbps - 10 Gbps per connection

Direct Peering

• Provides a direct connection between our business network and Google’s network
• With this connection we are able to exchange traffic using one the Google’s broad-reaching edge network location
• Direct Peering is done by exchanged BGP routes between Google and peering entity
• After the connection is in place, Direct Peering can be used to reach all the Google services and GCP products
• Direct Peering does not have an SLA

Carrier Peering

• Provides connectivity similar to Direct Peering through a supported partner
• Carrier Peering does not have an SLA

Comparison between Direct and Carrier Peering

• Direct Peering:
  • Dedicated, direct connection to Google’s network
  • Capacity of 10 Gbps
• Carrier Peering:
  • Peering through a service provider to Google’s public network
  • Varies based on partner offering

Choosing a Connection

• L2 (interconnect) vs L3 (peering)
• Interconnect services:
  • Provide direct access to RFC1918 IPs in our VPC with SLA
• Peering services:
  • Access to Google public IPs only without SLA