Modifying VLAN Attachments

This document describes how you can modify VLAN attachments for Dedicated Interconnect.


The following table lists properties associated with VLAN attachments and describes what to do if you want to modify a property:

Property How to modify
Description See the instructions in this document for Modifying description and capacity. Modifications are immediate and don't disrupt traffic.
Whether a VLAN attachment is enabled or disabled To disable or re-enable a VLAN attachment, see Disabling VLAN Attachments.
VLAN ID You can't modify these properties for existing attachments. Instead, you must recreate the VLAN attachment. To create VLAN attachments for Dedicated Interconnect, see Creating VLAN attachments.
BGP IP addresses (Cloud Router IP, on-premises router IP)

The peer ASN is not a property of the VLAN attachment— it is part of the BGP configuration of the Cloud Router. To modify the peer ASN, update the Cloud Router's BGP session for the VLAN attachment. For more information, see Viewing Cloud Router configuration, the glcoud compute routers update-bgp-peer command reference, or the routers.update API method reference.

Modifying description and capacity

The section provides instructions for updating the description and capacity of a VLAN attachment.


  1. Go to the Cloud Interconnect VLAN attachments tab in the Google Cloud Console.
    Go to VLAN attachments tab
  2. Select the VLAN attachment to modify.
  3. On the attachment's detail page, select Edit.
  4. Modify your VLAN attachment and then select Save.
    • Description — Information about the VLAN attachment.
    • Capacity — The maximum bandwidth of the attachment.


  1. Modify an InterconnectAttachment by specifying the name of the existing VLAN attachment and the attributes to modify.

    gcloud compute interconnects attachments dedicated update [NAME] \
      --region [ATTACHMENT'S_REGION] \
      --description [DESCRIPTION] \
      --bandwidth [BANDWIDTH]

    For more information, see the gcloud command line reference.