Configuring SNMP Trap

Configure SNMP Trap

Traps are used when the Device needs to alert the Network Management software of an event without being polled. Traps ensure that the NMS gets information if a certain event occurs on the device that needs to be recorded without being polled by the NMS first. Managed network devices will have Trap MIBs with predefined conditions built into them. It’s crucial that the Network management system has these MIBs compiled into them to receive any traps sent by the given device/s. The primary focus of this feature is to support SNMP Trap notifications and in particular, linkUp, linkDown and config change trap notifications.

Supported MIBs

  • MIBS added to support SNMP Trap

  • DISMAN-EVENT-MIB.txt

  • INET-ADDRESS-MIB.txt

  • IPV6-TC.txt

  • SNMP-FRAMEWORK-MIB.txt

  • SNMPv2-SMI.txt

  • DISMAN-SCHEDULE-MIB.txt

  • IP-FORWARD-MIB.txt

  • IPV6-UDP-MIB.txt

  • SNMP-MPD-MIB.txt

  • SNMPv2-TC.txt

  • ENTITY-MIB.txt

  • IP-MIB.txt

  • MTA-MIB.txt

  • SNMP-NOTIFICATION-MIB.txt

  • SNMPv2-TM.txt

  • HOST-RESOURCES-MIB.txt

  • IPV6-ICMP-MIB.txt

  • NETWORK-SERVICES-MIB.txt

  • SNMP-TARGET-MIB.txt

  • SNMP-VIEW-BASED-ACM-MIB.txt

  • HOST-RESOURCES-TYPES.txt

  • IPV6-MIB.txt

  • NOTIFICATION-LOG-MIB.txt

  • SNMP-USER-BASED-SM-MIB.txt

  • TCP-MIB.txt

  • IF-MIB.txt

  • IPV6-TCP-MIB.txt

  • SNMP-COMMUNITY-MIB.txt

  • SNMPv2-MIB.txt

  • UDP-MIB.txt

With these MIBs, you can trigger sending an SNMP trap to a configured SNMP-server host based on certain events. Also, GET/GETNext/WALK operations can be supported on these mibs. The linkUp and linkDown traps are sent to the configured host in the event that an interface Admin or Oper status changes from up to down or vice-versa. The configChange trap monitors NPB (MAP, rule, port-npb config) and port (Speed, MTU, FEC, Autoneg) configuration changes. A configChangeTrap PDU is sent to the host when any value in these tables are modified, added or removed.

https://support.aviznetworks.com/hc/en-us/articles/6940420122637-SNMP-Overview-and-Traps-Implemented-in-OPB-REL-2-1-0support.aviznetworks.com
Aviz SNMP support

Reference

Command

[no] snmp-server trap modify <version><ip4addr|ip6addr> [port <value>] [community

<value>]

Description

SNMP trap configuration

Parameters

Version, IPv4 or v6 Address , port, community values

Mode

CONFIG

Example

You can verify the configuration by using the command(s) below:

Traps are only supported on SNMPv2c

Disable PSU/FAN traps:

Below commands can be used to disable FAN/PSU traps temporarily,

Reference

Command

snmp-server trap (psu-util/fan-util) disable

Description

disable PSU/FAN traps temperoraly

Parameters

FAN/PSU

Mode

EXEC

By default, traps are generated every 60 seconds, which may cause unnecessary stress on memory and CPU. To mitigate this, disabling the default behaviour using the above command is recommended for disabling PSU and FAN traps.

This will result in traps being generated only when the PSU/FAN state changes, reducing the load on memory and CPU.

SNMP Trap Logs:

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