Connectrix MDS: The SNMP Service Stops with 'Signal 6' Type

Summary: The Simple Network Management Protocol (SNMP) service stops with 'signal 6' type.

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Symptoms

Environments:

  • Multilayer Director Switch (MDS) 9000 hardware with IPStorage Interfaces
  • MDS 9250i
  • MDS 9220i
  • MDS 9700 with 1/10/40G IPS,2/4/8/10/16G FC Module DS-X9334-K9

Error message:

%SYSMGR-2-SERVICE_CRASHED: Service "snmpd" (PID 123) hasn't caught signal 6 (core will be saved).

Cause

Cisco issue CSCwq54982 This hyperlink is taking you to a website outside of Dell Technologies. Memory Leak in libport_mgr_common.so 

An snmpd memory leak polling the IPStorage interface transceivers

Resolution

Workaround:
To prevent the signal 6 crash, monitor the SNMP service memory usage and reload the switch nondisruptively for fabric switches and system switchover for director class switches before the MemUsed reaches 90% of the MemLimit using the following commands:

show processes memory | include "PID|snmpd"

Director switch: system switchover 
Fabric switch: reload system non-disruptive 

The SNMP service automatically restarts after a system stop and is not interrupted.

Fix:
Upgrade to NX-OS 9.4.4

Affected Products

Connectrix MDS-9220i, Connectrix MDS-9250i, Connectrix MDS-Series Firmware 9.X
Article Properties
Article Number: 000390186
Article Type: Solution
Last Modified: 20 Nov 2025
Version:  2
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