BitTorrent traffic problem on GS2220

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cynik606
cynik606 Posts: 9 image  Freshman Member
First Comment Friend Collector First Anniversary
in Switch

Has anyone experienced something similar with GS2220?

I have a GS2220-28HP (firmware V5.00(ABRR.3)) connected to a QNAP TS-h765eU.

After upgrading the NAS from QuTS hero 5 to QuTS hero 6, BitTorrent traffic (both Download Station and qBittorrent) causes a very strange issue.

The switch logs repeated events like:

Port 25 link down
Port 25 link up 100M
Port 25 link down
Port 25 link up 100M
Port 25 link down
Port 25 link up 1G
STP topology changes switch becomes the STP new root

Things already checked:

  • Same behaviour with and without LACP (single port as well).
  • Storm Control disabled.
  • Loop Guard disabled on the QNAP ports.
  • STP Guard disabled.
  • Switch CPU is low.
  • QNAP logs do not report any NIC link down events.

The problem only occurs during BitTorrent traffic. SMB, backups and other traffic work normally.

Has anyone seen similar behaviour with GS2220 or QuTS hero 6?

All Replies

  • Zyxel_Melen
    Zyxel_Melen Posts: 4,951 image  Zyxel Employee
    Zyxel Certified Network Engineer Level 1 - Switch Zyxel Certified Network Administrator - Switch Zyxel Certified Network Administrator - Nebula Zyxel Certified Sales Associate
    edited July 9
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    Hi @cynik606

    I don't see any similar issues like this. Could you help to check:

    • Share your network topology so we can understand which port and device you connected.
    • Is the port led changing like the logs you shared?
    • What's the frequency of this issue during the BitTorrent traffic?
    • Did this issue only happen on QuTS hero 6 or also on QuTS hero 5?
    • Could you help to collect the tech support file so we can check the log timestamp and other information? You may send the tech support file to me via message.

    https://community.zyxel.com/en/discussion/21237/switch-how-to-collect-the-tech-support-info-on-v4-80-firmware-version-and-newer
    Zyxel Melen


  • cynik606
    cynik606 Posts: 9 image  Freshman Member
    First Comment Friend Collector First Anniversary
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    Hi,

    Thank you for your reply.

    Here are the answers:

    1. Topology
      GS2220-28HP is the only switch in my network. The QNAP TS-h765eU is connected using a 2-port LACP (802.3ad) bond on ports 25 and 26.
    2. Port LEDs
      During the issue I did not notice any physical link loss. The links remain at 1 Gbps. However, port 26 changes to BLOCKING in the switch dashboard and is no longer listed as a synchronized LACP member.
    3. Frequency
      The issue is reproducible during BitTorrent traffic. It happened with both Download Station and qBittorrent.
    4. QuTS version
      I never experienced this before upgrading the NAS to QuTS hero 6.
    5. Tech support
      Unfortunately I cannot generate the switch tech-support file. The generation starts, but after about one minute the web interface always ends with:

    Object Not Found – The requested URL "" was not found on the RomPager server.

    I can reproduce this every time in both Cloud Mode and Networked AV.

  • Zyxel_Melen
    Zyxel_Melen Posts: 4,951 image  Zyxel Employee
    Zyxel Certified Network Engineer Level 1 - Switch Zyxel Certified Network Administrator - Switch Zyxel Certified Network Administrator - Nebula Zyxel Certified Sales Associate
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    Hi @cynik606

    Thanks for your update. Since you mentioned cloud mode, could you help to enable Zyxel support access and share the org's name so we can access to check the settings and logs? Please also share the LACP setting on QNAP TS-h765eU with us.

    https://community.zyxel.com/en/discussion/14234/nebula-how-to-turn-on-zyxel-support-access
    Zyxel Melen


  • cynik606
    cynik606 Posts: 9 image  Freshman Member
    First Comment Friend Collector First Anniversary
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    Hi,

    Zyxel Support Access enabled. Organization name: "casabonita".

    Etherchannel setting in attached pdf file.

    Thanks

    etherchannel.pdf
  • Zyxel_Melen
    Zyxel_Melen Posts: 4,951 image  Zyxel Employee
    Zyxel Certified Network Engineer Level 1 - Switch Zyxel Certified Network Administrator - Switch Zyxel Certified Network Administrator - Nebula Zyxel Certified Sales Associate
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    Hi @cynik606

    Thanks. I checked the switch settings, logs, interface status, etc., but I didn't find any possible issue or root cause for this case.

    Since you mentioned, "I never experienced this before upgrading the NAS to QuTS hero 6," I would like to ask for your help in checking with QNAP whether this new version has this issue.

    Zyxel Melen


  • cynik606
    cynik606 Posts: 9 image  Freshman Member
    First Comment Friend Collector First Anniversary
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    Hi @Zyxel_Melen ,

    Thank you for checking my switch configuration and logs.

    I wanted to give you an update. Today QNAP support informed me that their engineer has applied a temporary workaround on my NAS.

    Since the workaround was applied, I have already downloaded over 150 GB via BitTorrent without any issues, so it looks promising.

    At the moment I don't know what exactly was changed on the NAS. Once QNAP provides more technical details or identifies the root cause, I will update this thread.

    Thank you again for your quick response and for helping investigate the issue!

  • Zyxel_Melen
    Zyxel_Melen Posts: 4,951 image  Zyxel Employee
    Zyxel Certified Network Engineer Level 1 - Switch Zyxel Certified Network Administrator - Switch Zyxel Certified Network Administrator - Nebula Zyxel Certified Sales Associate
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    Hi @cynik606

    Good to hear that! Additionally, could you share what's the workaround with us? It could help if other users encounter similar issue in future.

    Zyxel Melen


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