Network Management

Catalyst 6500 generates SNMP-3-INPUT_QFULL_ERR when receiving IF-MIB

Cisco Catalyst 6500 generates SNMP-3-INPUT_QFULL_ERR when receiving IF-MIB. Only an SNMP warm start will get it working again. This issue appears to be related to the getbulk request that UDT uses. The Cisco 6500 stops responding to any SNMP request shortly after the getbulk request. After 30 seconds or so, it starts to drop the packets as though it cannot forward them onto the snmp engine itself. The ‘input counter drops’ then increases until it fills up the queue then you get an “%SNMP-3-INPUT

First published date

10/15/2018 10:27 PM

Last published date

5/9/2023 2:33 PM

Overview

Cisco Catalyst 6500 generates SNMP-3-INPUT_QFULL_ERR when receiving IF-MIB.

Only an SNMP warm start will get it working again.

Product section

User Device Tracker

Cause

This issue appears to be related to the getbulk request that UDT uses. The Cisco 6500 stops responding to any SNMP request shortly after the getbulk request. After 30 seconds or so, it starts to drop the packets as though it cannot forward them onto the snmp engine itself. The ‘input counter drops’ then increases until it fills up the queue then you get an “%SNMP-3-INPUT_QFULL_ERR: Packet dropped due to input” error!

Resolution

Please contact Cisco support as this issue is related to their device.

Similar issue reported by Cisco:
Cisco Bug: CSCsz89393 - SNMP Queries fail on Bridge MIB, 3750 stack w-4 plus sw inactive vlans

Disclaimer: Please note, any content posted herein is provided as a suggestion or recommendation to you for your internal use. This is not part of the SolarWinds software or documentation that you purchased from SolarWinds, and the information set forth herein may come from third parties. Your organization should internally review and assess to what extent, if any, such custom scripts or recommendations will be incorporated into your environment. You elect to use third party content at your own risk, and you will be solely responsible for the incorporation of the same, if any.

Disclaimer: Please note, any content posted herein is provided as a suggestion or recommendation to you for your internal use. This is not part of the SolarWinds software or documentation that you purchased from SolarWinds, and the information set forth herein may come from third parties. Your organization should internally review and assess to what extent, if any, such custom scripts or recommendations will be incorporated into your environment. You elect to use third-party content at your own risk, and you will be solely responsible for the incorporation of the same if any.