Previously, we monitored incoming traffic on the eth0 device using an active Zabbix agent daemon item. If we have snmpd set up and running, we can also try retrieving outgoing traffic but, this time, let's try to use SNMP for that.
Monitoring network traffic using the Zabbix agent daemon is usually easier, but SNMP monitoring is the only way to obtain this information for many network devices, such as switches and routers. If you have such a device available, you can try monitoring it instead, though the network interface name will most likely differ.
One way to find the item we are interested in would be to redirect the output of snmpwalk to a file and then examine that file. Looking at the output, there are lines such as ...
