Spectrum OneClick has a minor alarm stating 'FAULT ISOLATION EVENT CUSTOMISED

Products

• Network Observability
• Spectrum

Issue/Introduction

We are seeing the following alarm on the VNM model What does this mean?

Thu 23 Oct, 2025 - 14:58:01 - Alarm number 160459 with probable cause id 0x10f2c generated for device sim0 of type VNM. The severity of this alarm is MINOR. (event [0x00010701])
Thu 23 Oct, 2025 - 14:58:01 - The fault Isolation events of type 0x10d09 is customised.

Environment

DX NetOps Spectrum: All Releases

Cause

One of the below event codes was customized. In the event example above, it was the 0x10d09 event. 

To prevent adverse affect's to Spectrum's fault isolation algorithms and undesirable results, and to prevent a direct impact on Fault Isolation (FI)/ Internal Port Link Status (IPLS), do not customize the following list of event codes:

LINK_GOOD = 0x00010d10,
LINK_BAD = 0x00010d11,
LINK_DISABLED = 0x00010d12,
LINK_UNKNOWN = 0x00010d13,
LINK_UNREACHABLE = 0x00010d14,
LINK_INITIAL = 0x00010d15,
LINK_BAD_SUPPRESSED = 0x00010d16,
LINK_LL_IN_MAINTENANCE = 0x00010d2e,
LINKED_PORT_BAD = 0x00010d17,
LINKED_DEVICE_BAD = 0x00010d18,
LINK_STATUS_CLEAR = 0x00010d2a,
LINK_DISABLED_AND_BAD = 0x0001040d,
LINK_ALWAYS_DOWN = 0x00010d2f,
LINK_BAD_WA_LINK_BAD = 0x00010d2d
CS_EVENT_ALARM_SET = 0x00010701
CS_EVENT_ALARM_UPDATED = 0x00010703
CS_EVENT_DEVICE_LOST = 0x00010302
DEVICE_CONTACT_STATUS_LOST = 0x00010d35
DEVICE_GATEWAY_UNREACHABLE = 0x00010d36
MGMT_LOST = 0x00010d00
UNRESOLVED_FAULT = 0x00010d05
APPLICATION_LOST = 0x00010d09
APPLICATION_REACTIVATED = 0x00010d0b
MGMT_REACTIVATED = 0x00010d0c
DEV_MNGMNT_NBORS_DOWN = 0x00010d19
LANDSCAPE_CONTACT_STATUS_CLEAR = 0x00010d20
PORT_LOST = 0x00010d66

PORT_REACTIVATED = 0x00010d67

ALARMING_MGMT_LOST_EVENT = 0x10daa

Resolution

Review the $SPECROOT/custom/Events directory for one of the above events and remove the customization. After removing the customization, navigate to the SpectroSERVER control sub-view and update the event configuration files. This will clear the alarm.

Do not customize any of the above events as this may cause undesirable results.