Monitor connections

To help you monitor connections, Cloud Interconnect reports metrics toCloud Monitoring. Monitoring these metrics canhelp you troubleshoot issues with the following:

  • Physical circuits (Cloud Interconnect connections)
  • VLAN attachments
  • Wires in cross-site networks

For Dedicated Interconnect, Cloud Interconnect reportsmeasurements for the connections and VLAN attachments. ForPartner Interconnect, Cloud Interconnect reports measurementsfor VLAN attachments only.

Google starts reporting Cloud Interconnect connection metrics afterGoogle allocates your ports, even before your connection is ready to use. Thatway, you can monitor the circuits while they're being set up and tested.

For VLAN attachments and wires, Google starts reporting metrics right after youcreate the attachment or wire group. Google reports the number of packets andbytes sent and received.

Data is reported in one-minute intervals to Monitoring and isretained in Monitoring for 6 weeks.

You can view general information about your Cloud Interconnectconnections and VLAN attachments by using theObservability tab:

Go to Physical connections

The following sections describe how to monitor specificCloud Interconnect connections or VLAN attachments.

Metrics and resource types

For more information about Cloud Interconnect metrics, see thefollowing links from the Cloud Monitoring documentation:

View metrics in the Google Cloud console

On theCloud Interconnect page in the Google Cloud console, you can viewthe activity for the following, depending on your connection type:

  • Cloud Interconnect connections, except for Partner Interconnect
  • VLAN attachments
  • Cross-site networks

Console

To view the monitoring information for aCloud Interconnect connection, follow these steps:

  1. In the Google Cloud console, go to the Cloud InterconnectPhysicalconnections tab.

    Go to Physical connections

  2. Select the connection to view.

  3. On theInterconnect connection details page, select theMonitoring tab.

    Depending on your connection type, the Google Cloud console showssome or all of the following activity for the selectedtimeframe (by default, the Google Cloud console shows the past hour'sactivity):

    • Utilization rate (bytes received and sent) compared to its overallcapacity.
    • Received bytes by VLAN attachment.
    • Sent bytes by VLAN attachment.
    • Number of outbound drops and number of inbound and outbound errors.

To view the monitoring information for a VLAN attachment, follow thesesteps:

  1. In the Google Cloud console, go to the Cloud InterconnectVLANattachments tab.

    Go to VLAN attachments

  2. Select the VLAN attachment to view.

  3. On theVLAN attachment details page, select theMonitoring tab.

    For each VLAN attachment, the Google Cloud console shows the bytesreceived and sent compared to its total capacity for the selectedtimeframe (by default, the Google Cloud console shows the past hour'sactivity).

To view the monitoring information for a cross-site network, follow thesesteps:

  1. In the Google Cloud console, go to theInterconnect page.

    Go to Interconnect

  2. On theCross-site networks tab, select the cross-site network to view.

  3. On theCross-site network details page, select theMonitoring tab.

    The Google Cloud console shows the following information:

    • The bytes received and sent by each wire group endpoint and wire endpoint
    • The operational status of each wire endpoint
    • The latency of each wire, measured by out of band probes

View metrics in Cloud Monitoring

Console

To view the metrics for a monitored resource by using theMetrics Explorer, do the following:

  1. In the Google Cloud console, go to the Metrics explorer page:

    Go toMetrics explorer

    If you use the search bar to find this page, then select the result whose subheading isMonitoring.

  2. In the toolbar of the Google Cloud console, select your Google Cloud project. ForApp Hub configurations, select the App Hub host project or the app-enabled folder's management project.
  3. In theMetric element, expand theSelect a metric menu, enterInterconnect in the filter bar, and then use the submenus to select a specific resource type and metric:
    1. In theActive resources menu, selectinterconnect.
    2. To select a metric, use theActive metric categories andActive metrics menus. For a list of metrics, seeinterconnect metrics.
    3. ClickApply.
  4. To add filters, which remove time series from the query results, use theFilter element.

  5. To combine time series, use the menus on theAggregation element. For example, to display the CPU utilization for your VMs, based on their zone, set the first menu toMean and the second menu tozone.

    All time series are displayed when the first menu of theAggregation element is set toUnaggregated. The default settings for theAggregation element are determined by the metric type you selected.

  6. For quota and other metrics that report one sample per day, do the following:
    1. In theDisplay pane, set theWidget type toStacked bar chart.
    2. Set the time period to at least one week.

Define alerting policies

Console

You can create alerting policies to monitor the values of metrics and to notify you when those metrics violate a condition.

  1. In the Google Cloud console, go to the Alerting page:

    Go toAlerting

    If you use the search bar to find this page, then select the result whose subheading isMonitoring.

  2. If you haven't created your notification channels and if you want to be notified, then clickEdit Notification Channels and add your notification channels. Return to theAlerting page after you add your channels.
  3. From theAlerting page, selectCreate policy.
  4. To select the metric, expand theSelect a metric menu and then do the following:
    1. To limit the menu to relevant entries, enterInterconnect into the filter bar. If there are no results after you filter the menu, then disable theShow only active resources & metrics toggle.
    2. For theResource type, selectInterconnect.
    3. For theMetric category, selectNetwork.
    4. For theMetric, select a metric from thelist of interconnect metrics.
    5. SelectApply.
  5. ClickNext.
  6. The settings in theConfigure alert trigger page determine when the alert is triggered. Select a condition type and, if necessary, specify a threshold. For more information, seeCreate metric-threshold alerting policies.
  7. ClickNext.
  8. Optional: To add notifications to your alerting policy, clickNotification channels. In the dialog, select one or more notification channels from the menu, and then clickOK.
  9. Optional: Update theIncident autoclose duration. This field determines when Monitoring closes incidents in the absence of metric data.
  10. Optional: ClickDocumentation, and then add any information that you want included in a notification message.
  11. ClickAlert name and enter a name for the alerting policy.
  12. ClickCreate Policy.
For more information, seeAlerting overview.

Create custom Monitoring dashboards

You can create custom Monitoring dashboards overCloud Interconnect metrics by addingcustom charts.

Console

To create custom Monitoring dashboards, follow these steps:

  1. In the Google Cloud console, go to theMonitoring page.

    Go to Monitoring

  2. SelectDashboards, and then clickCreate dashboard.

  3. Name the dashboard, and then clickAdd chart.

  4. Specify a name for the chart.

  5. Select the metrics and filters to use. For a list ofCloud Interconnect resource types and metrics that you canmonitor, seeMonitored resource typesorMetrics list.

  6. ClickSave.

View metrics in Network Topology

You can use Network Topology to audit your networking configurationand troubleshoot networking issues.

Network Topology overlays throughput values on eachconnection so that you can quickly see the amount of traffic betweenentities. For example, you can see the traffic traversing the VLANattachment that connects Google Cloud to an on-premises network.

Note: Network Topology isn't available for cross-site networks.

For information about the supported metrics for each connection, see theMetrics reference.

Metric values are based on the final five minutes of the selectedhour. You can also view historical date for six weeks by clicking on any of theedges.

For more information, seeData collection and freshness.

Console

  1. In the Google Cloud console, go to theNetwork Topology page.

    Go to Network Topology

  2. In the entities selection pane, select a metric from theEdge metricdrop-down menu.

  3. Navigate to a specific entity hierarchy to view traffic that is related tothat entity.

    For example, if you want to view traffic bandwidth traversing the VLANattachment between Google Cloud and the on-premises network,expand the entities until you see that connection.

  4. Click the entity to highlight all of its traffic paths.

    Network Topology displays metric values for each connectionthat supports the selected metric.

What's next

Except as otherwise noted, the content of this page is licensed under theCreative Commons Attribution 4.0 License, and code samples are licensed under theApache 2.0 License. For details, see theGoogle Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.

Last updated 2026-02-19 UTC.