Dropped-packet notification

Packet drops are common occurrences on network switches and routers. Debugging packet drops can be complex and time-consuming. The packet-processing pipeline supports a limited set of drop counters, but these counters are insufficient for debugging complex packet-drop issues. Debugging difficulties can result in high mean times to recovery (MTTRs).

Dropped-packet notifications, also referred to as mirror on drop (MoD), can help you debug packet drops in real time. The areas of packet drop monitored include:

• Packets dropped due to processing in the ingress pipeline
• Packets dropped due to processing in the egress pipeline
• Packets dropped due to congestion in the MMU

Dropped-packet notifications are stateless and flow unaware. You configure much of the dropped-packet notification feature at the [edit forwarding-options mirror-profile] hierarchy level.