# Counters for Network Performance

The following table shows the name, collection level, categories, and values for counters that measure network performance.

The VirtualCenter statistics level is a setting that controls reporting of metrics. Higher settings increase the amount of data collected and can impact performance.

- Level 1 collects resource use averages (but not for devices), uptime, heartbeat, and data for DRS (Distributed Resource Scheduler).
- Level 2 also includes usage summation and rollup types for the items above.
- Level 3 also collects device metrics in all the categories above.
- Level 4 also includes maximum and minimum rollup types.

Counter names in orange appear in the VI Client or other GUI.

### GROUP NAME: net

Counter Name | VC Stats Level | Attribute | Value
--- | --- | --- | ---
usage Network Usage | avg: 1 min: 4 max: 4 | description | Aggregated network performance: the sum of data transmitted and received for all NIC instances of the host or virtual machine.
unit | KBps
stat type | rate
rollup type | minimum, maximum, average
entity | host and virtual machine (aggregate level only)
packetsRx Network Packets Received | 3 | description | Number of packets received during the performance interval.
unit | number
stat type | delta
rollup type | summation
entity | host and virtual machine (per net instance only)
packetsTx Network Packets Transmitted | 3 | description | Number of packets transmitted during the performance interval.
unit | number
stat type | delta
rollup type | summation
entity | host and virtual machine (per net instance only)
received Network Data Receive Rate | 3 | description | Rate at which data was received during the performance interval.
unit | KBps
stat type | rate
rollup type | average
entity | host and virtual machine (per NIC instance only)
transmitted Network Data Transmit Rate | 3 | description | Rate at which data was transmitted during the performance interval.
unit | KBps
stat type | rate
rollup type | average
entity | host and virtual machine (per NIC instance only)