if you see dropped tx network packets and there are no crc errors, maybe the buffer system is overloaded.

to check if there are errors on the interface run command
- show interface 1
for example and in the error details you should see something like:
- Drops Tx : 341,216

now you can go deeper and check the interface queues, by default a HPE 3810 switch has 8 queues:
- command to check inteface 1:
show interfaces queues 1

Egress Queue Totals (Since boot or last clear) :
Tx Packets Dropped Packets Tx Bytes Dropped Bytes
Q1 17 0 1,318 0
Q2 0 0 0 0
Q3 28,503,348,277 341,216 25,442,912,596,215 511,994,124
Q4 0 0 0 0
Q5 0 0 0 0
Q6 0 0 0 0
Q7 0 0 0 0
Q8 2,163,190 0 288,245,498 0

>> in this sample you see Q3 has some "Dropped Bytes"

if you see dropped packets you can change the number of queues to 2 or 4 by using this command:
qos queue-config {2-queues | 4-queues | 8-queues

description of the command: "Configures the number of outbound priority queues for all ports on the switch using one of the following options: 2- queues, 4-queues, or 8-queues. Default: 8-queues"

----------------------- Important ---------------------------------------
This command (qos queue-config ..) will execute a write memory followed by an immediate reboot, replacing the Startup configuration with the content of the current Running configuration
-----------------------------------------------------------------------------






documentation:
---------------------------------
from HPE:
- Aruba 3810 / 5400R Advanced Traffic Management Guide for AOS-S 16.11
- https://www.arubanetworks.com/techdocs/AOS-Switch/16.11/Aruba%203810%265400R%20Advanced%20Traffic%20Management%20Guide%20for%20AOS-S%2016.11.pdf



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