[Unit]
Description=SNMP Daemon
After=network.target
ConditionPathExists=/etc/snmp/snmpd.conf

[Service]
Type=simple
Environment=MIBDIRS=/usr/share/snmp/mibs
Environment=SNMPDOPTS='-Lsd -Lf /dev/null -p /var/run/snmpd.pid -u snmp -g snmp 127.0.0.1'
EnvironmentFile=-/etc/default/snmpd
PassEnvironment=MIBDIRS
ExecStart=/usr/sbin/snmpd -f $SNMPDOPTS

[Install]
WantedBy=multi-user.target