Jumping values in /api/4/network

[ACrazyConcept]

Describe the bug
The values for bytes_recv_gauge and bytes_sent_gauge increases in large jumps with regular intervals. These jumps are not actual traffic.
I see the behavior both on an RPi4 and an Intel NUC.

To Reproduce
I have created a sensor in home-assistant that fetches the data from the api at /api/4/network.

[
  {
    "bytes_sent": 229609,
    "bytes_recv": 215685,
    "speed": 1048576000,
    "key": "interface_name",
    "interface_name": "eth0",
    "alias": null,
    "bytes_all": 445294,
    "time_since_update": 4.34731888771057,
    "bytes_recv_gauge": 3166404580666,
    "bytes_recv_rate_per_sec": 49613,
    "bytes_sent_gauge": 3061063472028,
    "bytes_sent_rate_per_sec": 52816,
    "bytes_all_gauge": 6227468052694,
    "bytes_all_rate_per_sec": 102429
  }
]

  - platform: rest
    resource: http://x.x.x.x:61208/api/4/network/interface_name/eth0
    name: eth0 out
    unique_id: eth0_out
    scan_interval: 60
    force_update: true
    value_template: >
      {%- set jsonObject = value_json['eth0'][0]  -%}
      {{ (jsonObject.bytes_sent_gauge | float / 1048576) | round(2) }}
    device_class: data_size
    unit_of_measurement: MiB
    state_class: total_increasing

Expected behavior
A smooth increase.

Screenshots

Environement (please complete the following information)

• Operating System (lsb_release -a or OS name/version):
  Rpi:

  $ lsb_release -a
  No LSB modules are available.
  Distributor ID: Debian
  Description:    Debian GNU/Linux 12 (bookworm)
  Release:        12
  Codename:       bookworm
  

  NUC:

  # lsb_release -a
  LibreELEC (official): 12.0.1
  

• Glances & psutil versions: 4.2.1 and 6.1.0 on both
• How do you install Glances (Pypi package, script, package manager, source): Docker
• Glances test: Everything OK or N/A

[nicolargo]

Hi @ACrazyConcept

I can not reproduce on my side.

$ while true; do curl http://localhost:61208/api/4/network/bytes_recv_gauge/eno2; sleep 3; echo ""; done
{"bytes_recv_gauge":382759438024}
{"bytes_recv_gauge":382759441324}
{"bytes_recv_gauge":382759458926}
{"bytes_recv_gauge":382759463563}
{"bytes_recv_gauge":382759467921}
{"bytes_recv_gauge":382759502931}
{"bytes_recv_gauge":382759554358}
{"bytes_recv_gauge":382759587520}
{"bytes_recv_gauge":382759610123}
{"bytes_recv_gauge":382761712368}
{"bytes_recv_gauge":382761860882}
{"bytes_recv_gauge":382761910486}
{"bytes_recv_gauge":382761963454}
==> Open a page on my WebBrowser to generate trafics
{"bytes_recv_gauge":382763588594}
{"bytes_recv_gauge":382763591666}
{"bytes_recv_gauge":382763595034}
{"bytes_recv_gauge":382763598825}

Are you sure that you do not have any hidden trafic on your network ?

[ACrazyConcept]

Hi @nicolargo

The jumps only happen intermittently so you might have to monitor it for a while. I don't really see a temporal pattern.
Although I guess I can't 100% rule out it is actual traffic, it seems strange.
I could maybe try to monitor the switch as well.

I made a test comparing Glances to Home Assistant System monitor. (same config as above.)

Raspberry Pi 4 Model B Rev 1.2
Distro......: Debian GNU/Linux 12 (bookworm)
Kernel......: Linux 6.6.62+rpt-rpi-v8