Description

MPC7E dropping packets with higher size in queues configured with buffer size as remainder

Symptoms

MPC7E dropping packets with higher size in queues configured with buffer size as remainder

Solution

MPC7E dropping packets with higher size in queues configured with buffer size as remainder


By default the minimum buffer size for EA specific card is 1568


set class-of-service schedulers s-NTT_CONTROL_AIRBUS-HNI-VL527 transmit-rate remainder

set class-of-service schedulers s-NTT_CONTROL_AIRBUS-HNI-VL527 buffer-size remainder

set class-of-service schedulers s-NTT_CONTROL_AIRBUS-HNI-VL527 priority low


The total buffer size for the queue is set as 1568 bytes.

 Queue-depth bytes      :
    Average              :                     0
    Current              :                     0
    Peak                 :                     0
    Maximum              :                  1568                <<<< default value.


As 100% of buffer and scheduler is allocated for other queues, the default minimum value is assigned to the queue.

So packet size greater than this value cannot be forwarded out of the queue and the packets will be dropped as tail drop in the queue.

 

Modification History

2025-04-07 : Article Created