Packet Drop Logging - Lenovo CN4093 Application Manual

10gb converged scalable switch

Hide thumbs Also See for CN4093:

Table of Contents

Packet Drop Logging

Packet drop logging allows you to monitor network deficiencies by generating

syslog messages for packet drops in the CPU queues. By default, the switch will

generate such messages once every 30 minutes, specifying the type of traffic, queue

data rate and queue number on which the drops occurred, such as:

Apr 19 11:27:35 172.31.37.200 NOTICE Protocol control discards: ARP

Broadcast packets are received at rate higher than 200pps, hence are

discarded on queue 5.

To enable or disable packet drop logging, use the following commands:

CN 4093(config)# [no] logging pdrop enable

You can adjust the logging interval between 0 and 30 minutes using the following

CN 4093(config)# logging pdrop interval <0-30>

Setting the logging interval to 0 will log packet drops immediately (with up to 1

second delay), and will ignore further drops on the same queue during the next 2

Setting the logging interval to a greater value (1 – 30 minutes), regularly displays

packet drop information at the designated time intervals. Once the packet drops

stop, or if new packet drops are encountered only within 2 minutes after a syslog

message, the switch does not display any more messages.

Chapter 12: Quality of Service