You can temporarily disable a VLAN attachment for a Partner Interconnect connection so that it stops forwarding packets. This can be useful, for example, for testing failover.
Disable one connection to test that the redundant connection can successfully serve traffic.
Console
-  In the Google Cloud console, go to the Cloud Interconnect VLAN attachmentstab. 
-  Select a VLAN attachment to disable. 
-  On the VLAN attachment detailspage, click Disable. The attachment stops forwarding packets within a minute or two. To re-enable the attachment, click Enable. 
gcloud
-  To disable an existing active attachment, use the --no-admin-enabledflag:gcloud compute interconnects attachments partner update my-attachment --region= REGION --no-admin-enabled Replace REGIONwith the region that your VLAN attachment is located in.The attachment stops forwarding packets within a minute or two. To enable the attachment, use the --admin-enabledflag.
What's next
-  To create a Partner Interconnect connection, see the Partner Interconnect provisioning overview . 
-  To learn more about Cloud Interconnect options, see the Cloud Interconnect overview . 
-  To help you solve common issues that you might encounter when using Partner Interconnect, see Troubleshooting . 

