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Network | Link | Link Down

Symptoms

Connection lost

Probable Causes

Administrative action, cable damage, hardware or software error either from this or from another side

Check configuration, both sides of links and hardware

Variables

Variable Description Default
interface interface name
description Interface description =InterfaceDS.description
link Link ID =InterfaceDS.link

Alarm Correlation

Scheme of correlation of Network | Link | Link Down alarms with other alarms is on the chart. Arrows are directed from root cause to consequences.

graph TD A[["Network | Link | Link Down"]] R1["Network | Link | Link Down"] R2["Chassis | Linecard | LC Down"] R3["Network | LBD | Loop Detected"] R4["Network | STP | STP Loop Detected"] R5["Network | Link | Err-Disable"] R6["Chassis | Hardware | Hardware Port Error"] R7["Network | Link | DOM | Alarm: Out of Threshold"] C8["Network | BFD | Session Down"] C9["Network | IS-IS | Adjacency Down"] C10["Network | EIGRP | Neighbor Down"] C11["Network | PIM | Neighbor Down"] C12["Network | Link | Link Down"] C13["Network | OSPF | Neighbor Down"] R1 --> A R2 --> A R3 --> A R4 --> A R5 --> A R6 --> A R7 --> A A --> C8 A --> C9 A --> C10 A --> C11 A --> C12 A --> C13

Root Causes

Network | Link | Link Down alarm may be consequence of

Alarm Class Description
Network | Link | Link Down Other side link down
Chassis | Linecard | LC Down Linecard Down
Network | LBD | Loop Detected LBD Loop
Network | STP | STP Loop Detected STP Loop Detected
Network | Link | Err-Disable err-disable
Chassis | Hardware | Hardware Port Error Hardware Port Error
Network | Link | DOM | Alarm: Out of Threshold DOM Out of Threshold

Consequences

Network | Link | Link Down alarm may be root cause of

Alarm Class Description
Network | BFD | Session Down Link Down
Network | IS-IS | Adjacency Down Link Down
Network | EIGRP | Neighbor Down Link Down
Network | PIM | Neighbor Down Link Down
Network | Link | Link Down Other side link down
Network | OSPF | Neighbor Down Link Down

Events

Opening Events

Network | Link | Link Down may be raised by events

Event Class Description
Network | Link | Link Down dispose

Closing Events

Network | Link | Link Down may be cleared by events

Event Class Description
Network | Link | Link Up Clear Link Down