DEFAULT_SNMPDOPTS=" -Lsd -Lf /dev/null -u Debian-snmp -g Debian-snmp -I -smux, -I -interface -I -ipAddressTable -I -ifTable -I-ifXTable -I-var_route, -I -ipCidrRouteTable, -I -inetCidrRouteTable"

but same result

it is  Debian 10  from  clear install ?

or upgrade  from old ?

yes

Linux billing2 4.19.0-6-amd64 #1 SMP Debian 4.19.67-2+deb10u2 (2019-11-11) x86_64 GNU/Linux

updated

/etc/default/snmpd

это не кактит уже с debian 9

and there

# This file controls the behaviour of /etc/init.d/snmpd
# but not of the corresponding systemd service file.
# If needed, create an override file in
# /etc/systemd/system/snmpd.service.d/local.conf
# see man 5 systemd.unit and man 5 systemd.service

# Don't load any MIBs by default.
# You might comment this lines once you have the MIBs downloaded.
export MIBS=

# snmpd options (use syslog, close stdin/out/err).
#SNMPDOPTS='-Lsd -Lf /dev/null -u Debian-snmp -g Debian-snmp -I -smux,mteTrigger,mteTriggerConf -p /run/snmpd.pid'

SNMPDOPTS="-Lsd -Lf /dev/null -u Debian-snmp -g Debian-snmp -I -smux, -I -interface -I -ipAddressTable -I -ifTable -I-ifXTable -I-var_route, -I -ipCidrRouteTable, -I -inetCidrRouteTable -f -p /run/snmpd.pid"

but same result

# /etc/systemd/system/snmpd.service.d/local.conf

in coment

yes

ls: cannot access '/etc/systemd/system/snmpd.service.d/local.conf': No such file or directory

directory not exist

do you use systemd  or initd ?

initd

/etc/init.d/snmpd