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Merge pull request #6482 from donaldsharp/update_snmp_rst

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doc: Update snmp.rst
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Renato Westphal 2020-05-30 00:17:11 -03:00 committed by GitHub
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@ -23,6 +23,40 @@ the latest version of `net-snmp` which was formerly known as `ucd-snmp`. It is
free and open software and available at `http://www.net-snmp.org/ <http://www.net-snmp.org/>`_ free and open software and available at `http://www.net-snmp.org/ <http://www.net-snmp.org/>`_
and as binary package for most Linux distributions. and as binary package for most Linux distributions.
.. _net-smtp-configuration:
NET-SNMP configuration
====================
Routers with a heavy amount of routes (e.g. BGP full table) might experience
problems with a hanging vtysh from time to time, 100% CPU on the snmpd or
even crashes of the frr daemon(s) due to stalls within AgentX. Once snmp
agents connects they start receiving a heavy amount of SNMP data (all the
routes) which cannot be handled quick enough. It's recommended (by several
vendors as well) to exclude these OID's unless you really need them, which
can be achieved by amending the default view from SNMP
:file:`/etc/snmp/snmpd.conf`:
::
# This is the default view
view all included .1 80
# Remove ipRouteTable from view
view all excluded .1.3.6.1.2.1.4.21
# Remove ipNetToMediaTable from view
view all excluded .1.3.6.1.2.1.4.22
# Remove ipNetToPhysicalPhysAddress from view
view all excluded .1.3.6.1.2.1.4.35
# Remove ipCidrRouteTable from view
view all excluded .1.3.6.1.2.1.4.24
# Optionally protect SNMP private/secret values
view all excluded .1.3.6.1.6.3.15
view all excluded .1.3.6.1.6.3.16
view all excluded .1.3.6.1.6.3.18
# Optionally allow SNMP public info (sysName, location, etc)
view system included .iso.org.dod.internet.mgmt.mib-2.system
.. _agentx-configuration: .. _agentx-configuration:
AgentX configuration AgentX configuration