# Entities

Entities as described earlier are based on the table and column names
within the database, if you are unsure of what the entity is you want
then have a browse around inside MySQL using `show tables` and `desc <tablename>`.

Below are some common entities that you can use within the alerting
system. This list is not exhaustive and you should look at the MySQL
database schema for the full list.

## Devices

Entity | Description
---|---
`devices.hostname` | The device hostname
`devices.sysName` | The device sysName
`devices.sysDescr` | The device sysDescr
`devices.hardware` | The device hardware
`devices.version` | The device os version
`devices.location` | The device location
`devices.status` | The status of the device, 1 | up, 0 | down
`devices.status_reason` | The reason the device was detected as down (icmp or snmp)
`devices.ignore` | If the device is ignored this will be set to 1
`devices.disabled` | If the device is disabled this will be set to 1
`devices.last_polled` | The the last polled datetime (yyyy-mm-dd hh:mm:ss)
`devices.type` | The device type such as network, server, firewall, etc.

## Device Stats

Entity | Description
---|---
`device_stats.ping_loss_last` | Packet loss at last poll (percent)
`device_stats.ping_loss_avg` | Average packet loss (percent)
`device_stats.ping_rtt_last` | Ping RTT at last poll (ms)
`device_stats.ping_rtt_avg` | Average ping RTT (ms)
`device_stats.ping_rtt_diff_avg_last` | Difference between the RTT last and average ping (ms)
`device_stats.ping_rtt_diff_avg_last` | Difference between the RTT of the ping from the last 2 polls (ms)

Details on how the averages above are calculated can be found [here](../Support/Configuration.md#averaging-factor).

The difference fields can be used to detect when ping times increase from their normal valuse.

## BGP Peers

Entity | Description
---|---
`bgpPeers.astext` | This is the description of the BGP Peer
`bgpPeers.bgpPeerIdentifier` | The IP address of the BGP Peer
`bgpPeers.bgpPeerRemoteAs` | The AS number of the BGP Peer
`bgpPeers.bgpPeerState` | The operational state of the BGP session
`bgpPeers.bgpPeerAdminStatus` | The administrative state of the BGP session
`bgpPeers.bgpLocalAddr` | The local address of the BGP session.

## IPSec Tunnels

Entity | Description
---|---
`ipsec_tunnels.peer_addr` | The remote VPN peer address
`ipsec_tunnels.local_addr` | The local VPN address
`ipsec_tunnels.tunnel_status` | The VPN tunnels operational status.

## Memory pools

Entity | Description
---|---
`mempools.mempool_type` | The memory pool type such as hrstorage, cmp and cemp
`mempools.mempool_descr` | The description of the pool such as Physical memory, Virtual memory and System memory
`mempools.mempool_perc` | The used percentage of the memory pool.

## Ports

Entity | Description
---|---
`ports.ifDescr` | The interface description
`ports.ifName` | The interface name
`ports.ifSpeed` | The port speed in bps
`ports.ifHighSpeed` | The port speed in mbps
`ports.ifOperStatus` | The operational status of the port (up or down)
`ports.ifAdminStatus` | The administrative status of the port (up or down)
`ports.ifDuplex` | Duplex setting of the port
`ports.ifMtu` | The MTU setting of the port.

## Processors

Entity | Description
---|---
`processors.processor_usage` | The usage of the processor as a percentage
`processors.processor_descr` | The description of the processor.

## Storage

Entity | Description
---|---
`storage.storage_descr` | The description of the storage
`storage.storage_perc` | The usage of the storage as a percentage.

## Health / Sensors

 Entity | Description
---|---
 `sensors.sensor_desc` | The sensors description.
 `sensors.sensor_current` | The current sensors value.
 `sensors.sensor_prev` | The previous sensor value.
 `sensors.lastupdate` | The sensors last updated datetime stamp.