Computer and IT knowledge - things to know
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
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documentation:
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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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