Network Topology metrics
This document describes Cloud Monitoring metrics and metadata, which you can view in a Network Topology visualization for each entity and connection.
- Metadata describes data such as name, description, and location.
- Metrics describe data such as traffic, latency, and packet loss, which are the supported metrics for connections.
For each Network Topology hierarchy, the Google Cloud console displays a single metric for Compute Engine virtual machine (VM) instance entities and region entities, as well as for connections. You can change this default metric.
For more information, see the Network Topology overview and Graph interface elements.
For steps describing how to work with metrics and metadata, see Audit your networking configuration with Network Topology.
Metrics for VM or regional entities
This section lists metrics for VMs or regional entities.
Entity | Metrics |
---|---|
VM |
|
Region |
|
Metrics for connections between entities
This section lists metrics for connections between entities.
Some connections support packet loss or latency metrics. Packet loss is based on probers that estimate the packet loss that you might experience, while latency and other metrics are based on your own traffic.
If there are not enough probes or traffic to calculate a high confidence value for packet loss or latency, Network Topology displays an asterisk (*) next to the value on the graph. For more information about how these metrics are calculated, see the Metrics section of the Performance Dashboard overview.
Connections in the VM hierarchy
This section lists metrics for connections in the aggregation hierarchy where VM is the base entity. For more information about entities and their aggregation hierarchies, see Resources and traffic.
Connection | Metrics |
---|---|
VM to VM1 |
|
1 VM-to-VM flows are not available at all aggregation levels. For example, the VM-to-VM flow is not available, but the VM-to-region flow is available.
2 Packet loss is available only for regions and zones.
Client to load balancing
This section lists metrics and metadata for traffic from external or internal clients to different types of Cloud Load Balancing.
Entity (node or edge) | Metrics |
---|---|
External client3 to HTTP(S) Load Balancing |
|
External client to External SSL Proxy Load Balancing or External TCP Proxy Load Balancing |
|
External client to Network Load Balancing |
|
3For external clients, Network Topology supports only
aggregation levels from Country
and higher.
Load balancing to backend instance groups
This section lists metrics and metadata from different types of Cloud Load Balancing to instance group backends.
Entity or connection | Metrics |
---|---|
HTTP(S) Load Balancing to backend (instance group) |
|
External SSL Proxy Load Balancing or External TCP Proxy Load Balancing to backend (instance group) |
|
Internal TCP/UDP Load Balancing to backend (instance group) |
|
Network Load Balancing to backend (instance group) |
|
VLAN attachments
This section lists metrics and metadata for the data transferred between your VPC network and the on-premises network, as counted by the VLAN attachment. An on-premises network can refer to any remote network that is outside the Google Cloud domain. The connection between Google Cloud and on-premises can traverse either dedicated or partner Interconnect devices.
Entity or connection | Metrics |
---|---|
VPC network to the on-premises network | Traffic: based on egress bytes count and
ingress bytes count
|
VPN tunnels
This section lists metrics and metadata for the data transferred between your VPC network and the on-premises network, as counted by the VPN tunnel.
Entity or connection | Metrics |
---|---|
VPC network to the on-premises network | Traffic: based on egress bytes count and
ingress bytes count
|
VM to VLAN attachments
This section lists metrics and metadata for the data transferred between your VM and VLAN attachment. The connection between Google Cloud and on-premises can traverse either dedicated or partner Interconnect devices.
Entity or connection | Metrics |
---|---|
VM to VLAN attachments | Traffic: based on egress bytes count and
ingress bytes count
|
VM to VPN tunnels
This section lists metrics and metadata for the data transferred between your VM and VPN tunnels.
Entity or connection | Metrics |
---|---|
VM to VPN tunnels | Traffic: based on egress bytes count and
ingress bytes count
|
Client to Google services
This section lists metrics and metadata for traffic from internal clients to different types of Google-managed services.
Entity or connection | Metrics |
---|---|
VPC network to Google-managed services | Traffic: based on egress bytes count and
ingress bytes count
|
Router appliance
This section lists metrics and metadata for the data transferred between your VPC network and the on-premises network, as counted by the router appliance instance.
Entity or connection | Metrics |
---|---|
VPC network to the on-premises network | Traffic: based on egress bytes count and
ingress bytes count
|
VM to router appliance instance
This section lists metrics and metadata for the data transferred between your VM and router appliance instances.
Entity or connection | Metrics |
---|---|
VM to router appliance instance | Traffic: based on egress bytes count and
ingress bytes count
|