update mib_indexes?

Alexander Dahl <[email protected]> Tue, 8 May 2018 10:50:22 +0200
Newsgroups	gmane.network.net-snmp.user
Message-ID	<[email protected]>
Hello,

on an embedded system we had problems with snmpd starting, which we
could track down to the mib_indexes folder/files. This is what
happened:

1) system has some MIB files in some folder which is known to
net-snmp, no mib_indexes yet
2) net-snmp creates mib_indexes
3) we add some MIB files to the folder from 1), mib_indexes stay the
same
4) snmpd won't startup properly with the following error in syslog:

May  8 08:42:55 XXX daemon.err snmpd[366]: MIB search path: /root/.snmp/mibs:/usr/share/snmp/mibs
May  8 08:42:55 XXX daemon.err snmpd[366]: Cannot find module (LLDP-MIB): At line 0 in (none)
May  8 08:42:55 XXX daemon.err snmpd[366]: /etc/snmp/snmpd.conf: line 30: Error: bad SUBTREE object id
May  8 08:42:55 XXX daemon.err snmpd[366]: net-snmp: 1 error(s) in config file(s)

The reported line in snmpd.conf is this:

    view    public_view     included    LLDP-MIB::lldpMIB

LLDP-MIB is one of the MIB files we added in 3) but there's no entry
for that in mib_indexes.

Now my question: what is the designated way to update those
mib_indexes? Can net-snmp scan by itself somehow? How can that be
triggered? Or is this to be done manually by administrator? 

I could not find any information on this topic in a web search or in
some manual. :-/

Greets
Alex

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