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VPC interconnection FAQs

Last Updated: Jan 09, 2018

1. Does the data transferred by Express Connect go over the Internet?

No. Data on Express Connect is transmitted only inside Alibaba Cloud data centers or over lease lines among the data centers and does not pass through the Internet. This avoids data leakage during transmission and provides better network quality than the Internet.

2. Does Express Connect support multi-tenant VPC intranet connection?

Yes. Express Connect supports establishing an intranet connection between VPCs under the same account or different accounts. For more information, see Establish an intranet connection between VPCs under different accounts.

3. Does Express Connect support cross-region VPC intranet connection?

Yes. Express Connect supports establishing an intranet connection between VPCs in the same region or different regions. You can create a router interface on the VRouter of each VPC respectively and build Express Connect through Alibaba Cloud's backbone transmission network to achieve secure, reliable, fast, and convenient communication between the VPCs.

4. If I use Express Connect for VPC intranet connection, what resources can the two sides access?

ECS instances on both sides can access the ECS instances, Server Load Balancer instances, and RDS instances of the other side.

  • Server Load Balancer instances on one side cannot use ECS instances of the other side as backend servers.
  • ECS instances of one side cannot access cloud product instances other than the ECS instances, Server Load Balancer instances, and RDS instances of the other side. More instances will be supported in the future.

5. Can I adjust the specification of a router interface in case of service spike?

Alibaba Cloud now supports upgrading or downgrading the specification of a router interface. You can change the specification of the initiator router interface at any time as needed and the change takes effect immediately.

6. Why cannot I buy a cross-border router interface on the console?

Now the minimum specification for a cross-border router interface is Small.1. Because of the characteristics of cross-border service, you cannot directly buy a cross-border router interface on the console and need to open a ticket and go through an offline process. For information about the billing method, contact your customer manager.

7. Will Alibaba Cloud limit the transmission capacity of an Express Connect router interface?

Alibaba Cloud will limit the data transmission capacity according to the specification of the router interface purchased by you.

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