This document describes how to modify Partner Interconnect VLAN attachments and their Border Gateway Protocol (BGP) sessions.
The following table lists VLAN attachment and BGP session properties. It also provides information about how to modify them.
|Property||How to modify|
|Capacity||Work with your service provider as described in the Modify capacity section in this document.|
|Description and MTU||
See the Modify the description and MTU section in this document.
Modifications are immediate and in rare cases can cause traffic disruption. If traffic is disrupted, the disruption lasts less than a minute.
|Stack type||Not modifiable. Partner Interconnect supports only IPv4 traffic.|
|Whether a VLAN attachment is enabled or disabled||To disable or re-enable a VLAN attachment, see Disable VLAN attachments.|
BGP IP addresses (Cloud Router IP address, on-premises router IP address)
You can't modify these properties for existing attachments. Instead, you must recreate the VLAN attachment.
To create VLAN attachments for Partner Interconnect, see Create VLAN attachments.
|Custom learned routes||Follow the steps in Update an existing session to use custom learned routes.|
|MD5 authentication||If you have a Layer 2 connection, follow the steps in Add authentication to an existing session. If you have a Layer 3 connection, contact your service provider for instructions.|
The peer ASN is not a property of the VLAN attachment—it is part of the BGP configuration of the Cloud Router. If you have a Layer 2 connection and you want to modify the peer ASN, update the Cloud Router's BGP session for the VLAN attachment.
For more information, see the following resources:
- Viewing BGP session configuration
glcoud compute routers update-bgp-peercommand reference
routers.updateAPI method reference
For an existing VLAN attachment, Google Cloud supports increasing or decreasing the attachment's capacity as your capacity demands rise or fall. Because capacity changes can affect your service provider's network, you must work with them to change your attachment's capacity. Changes in capacity, in rare cases, can cause traffic disruption. If traffic is disrupted, the disruption lasts less than a minute.
After the service provider has updated your attachment, your service provider works with Google to update the attachment's capacity in your Google Cloud project. At that time, Google updates the charges for the attachment based on the new capacity.
If you modify the capacity of an encrypted VLAN attachment, you might need to add HA VPN tunnels to accommodate increased traffic. For more information, see Configure HA VPN over Cloud Interconnect.
For a list of all the service providers, see Supported service providers.
Modify the description and MTU
This section provides instructions for updating the description and MTU of a VLAN attachment. In rare cases, changing the attributes of a VLAN attachment can cause traffic disruption. If traffic is disrupted, the disruption lasts less than a minute.
To make use of the 1460 or 1500-byte MTU, the VPC network that uses
the attachment must have the same MTU value. In addition, the on-premises
VMs and routers must have the same MTU value. If your network has the default MTU
1460, then select an MTU of
1460 for your VLAN attachment.
You cannot modify the MTU (
1440) of an encrypted VLAN attachment
that is used in an HA VPN over Cloud Interconnect deployment.
In the Google Cloud console, go to the Cloud Interconnect VLAN attachments tab.
Select the VLAN attachment to modify.
On the attachment's detail page, click Edit.
Modify the Description of your VLAN attachment, and then click Save.
Optional: Update the maximum transmission unit (MTU) of the attachment.
interconnectAttachment by specifying the name of the existing
VLAN attachment and the attributes to modify:
gcloud compute interconnects attachments partner update NAME \ --region=REGION \ --description=DESCRIPTION \ --mtu=MTU
Replace the following:
NAME: the name of the existing VLAN attachment
REGION: the region of the attachment
DESCRIPTION: a description of the attachment
MTU: the MTU of the attachment
For more information, see the
gcloud compute interconnects attachments partner update reference.
To create an 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.