Approximately 90 enabled items are included in RAy2 templates. Most items are implemented by RACOM, but there are also items from the well-known MIB files IF-MIB and RMON.
Some items are disabled by default.
The provided templates have predefined update intervals and for how many days each item keeps its history and trend values. All of these parameters define the requirements for the Zabbix server performance and the database size.
Update interval [seconds]
– Refresh the item every N seconds.
Keep history [days]
– Number of days to keep detailed history in the database. Older data will be removed by the Housekeeper.
Keep trends [days]
– Keep aggregated (hourly min, max, avg, count) detailed history for N days in the database. Older data will be removed by the Housekeeper. Note that trends are only stored for numerical items.
Based on these parameters, items are divided into four groups:
Update interval = 1 day (86400 seconds), History = 30 days, Trends = 400 days
Update interval = 1 hour (3600 seconds), History = 30 days, Trends = 200 days
Update interval = 5 minutes (300 seconds), History = 60 days, Trends = 400 days
Update interval = 1 minute (60 seconds), History = 400 days, Trends = 400 days
Group 4 consists of the most useful values to watch:
Input “Ethernet1” data port throughput in bps
Output “Ethernet1” data port throughput in bps
Current net bitrate in bps
Current RF Power in dBm
Receive RSS indicator in dBm
Receive SNR indicator in dB
From our experience, all these values are important to watch and to have them updated each 60 seconds. It is also useful to be able to display these values in detail even if they are one-year-old.
If you need to have even more accurate values, you can decrease the update interval. The smallest useful value for the throughput items is 10 seconds. Reading RSS or SNR can be done every second, because its value is always the current one.
We calculated that with the predefined RAy2 template (enabled values only), you approximately need about 0.75 GB of data for one RAy2 link (two units). Have this in mind when considering the database size. It can be increased a lot in case of many traps being sent from the RAy2 units.
Hints & Tips
The link reliability, link uptime, downtime or BER can be read because of our own OIDs. These values are updated every 5 minutes by default.
Watching the number of CRC errors can detect faulty cables and the number of dropped packets can warn you about high Ethernet traffic (bursts) so RAy2 drops some of them.
By default, the templates automatically populate the Inventory of individual hosts (serial number, unit type, MAC address, …). If you enable Inventory of your RAy2 hosts (in the host configuration menu), you’ll be able to see those values within the unit’s Inventory without any additional steps or without configuring them manually.
You can define the default Inventory mode in the Administration – Others menu.