Chapter 41: Logging
STANDARD Revision 1.0 C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved. 1066
Configuring SNMP Notification Filters
A notification-security-model may optionally be configured with an associated filter in order to restrict the trap types that
can be generated using a particular model. The commands to create a filter are very similar to the commands used to
create an SNMP view. Use the following commands to create filters:
configure snmp-server notify-filter [profile <filtername>] [subtree <MIB-family>] [type <included
| excluded>]
configure snmp-server notify-filter [profile <filtername>] [subtree <MIB-family>] no
These commands map directly to the SNMP MIB table "snmpNotifyFilterTable" as explained in RFC3413. The syntax of the
parameters is similar to the "snmp-server view …" commands explained in section 4.1.1.1 of the RFC.
Throttle Control of Event Messages
The use of throttle control protects the data network from exceeding a known threshold during bursts of event messages.
Any number of asynchronous events transmitted into an operator’s management network may require throttling,
especially if management traffic is carried in-band with user traffic.
System-Wide Network Throttle
The C4/c CMTS implements a single system-wide network throttle that applies to both Syslog message and SNMP TRAP
transmissions.
The network throttle can be set to one of four types:
Unconstrained = no throttling
Limit = message rates are maintained below a defined threshold
Stop = messages are inhibited after reaching a defined threshold
All = all event messages are inhibited
By default, the C4/c CMTS network throttle type is unconstrained.
Throttling Set to Limit
When throttling is set to "limit", then the C4/c CMTS limits the amount of traffic transmitted onto the management
network within a given time interval. This message rate is limited by a provisionable threshold.
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