GS1920-48HP - Port Led Issue and link speed issue

liuck1975
liuck1975 Posts: 8
First Comment Friend Collector
edited April 2023 in Switch

Hi all, is my first post here, so maybe if I get something wrong please tell me.

I have a new GS1920-48HP switch, just started the configuration.

It needs to run vlan 1 and vlan 20 (used for voice). I am noticing an unusual behavior, if I connect a device (e.g., a phone) to the switch port and then cascade a computer to the phone, I have bandwidth locked at 100 mbps, if the computer is connected directly to the switch instead I have the maximum bandwidth available from the router (my connection is mixed-copper at 200 mbps). Am I doing something wrong with the vlan configuration? Is there a traffic shape that is turned on by default? I also have another peculiar behavior, the activity LEDs do not light up, I only see an amber LED appear when I connect a POE device to one of the switch ports. The traffic is handled correctly and the network is available but the LEDs are all off except for the PWR LED which is solid green, SYS which is solid green, and Cloud which is flashing instead because I have not paired the switch with Nebula.

gs1920_1.jpg
gs1920_2.jpg

Accepted Solution

  • Zyxel_Melen
    Zyxel_Melen Posts: 2,577  Zyxel Employee
    Zyxel Certified Network Engineer Level 1 - Switch Zyxel Certified Network Administrator - Switch Zyxel Certified Network Administrator - Nebula Zyxel Certified Sales Associate
    edited April 2023 Answer ✓

    Hi @liuck1975,

    The GS1920-48HP has a PoE mode button on the right of the front panel.

    When it is on, the port LED will display the PoE status. When it is off, the port LED will display the link speed. I think this button is on now.

    image.png

    Zyxel Melen


«1

All Replies

  • Fred_77
    Fred_77 Posts: 120  Ally Member
    5 Answers First Comment Friend Collector Fourth Anniversary

    Hi @liuck1975

    forgive the silly question… but isn't it that your phone has only 10/100 ports and not gigabit?

    Fred

  • Zyxel_Melen
    Zyxel_Melen Posts: 2,577  Zyxel Employee
    Zyxel Certified Network Engineer Level 1 - Switch Zyxel Certified Network Administrator - Switch Zyxel Certified Network Administrator - Nebula Zyxel Certified Sales Associate

    Hi @liuck1975,

    What's the link speed of your IP phone? It is more likely the IP phone causes your PC to get unexpectedly low bandwidth.

    For the LED part, could you help to take a photo for me to clarify? Thanks.

    Zyxel Melen


  • liuck1975
    liuck1975 Posts: 8
    First Comment Friend Collector

    Hi all, the phones are cisco model 6851 and have gigabit ports. Therefore, it is not a link speed problem

  • liuck1975
    liuck1975 Posts: 8
    First Comment Friend Collector
    https://community.zyxel.com/en/discussion/comment/51000#Comment_51000

    Hi Melen, I attach the pics on my first post!

    gs1920_1.jpg
    gs1920_2.jpg

  • Fred_77
    Fred_77 Posts: 120  Ally Member
    5 Answers First Comment Friend Collector Fourth Anniversary

    Hi

    excluding the low quality of the patch cord, amber ligth should means 100 Mbit link. You could chech the port link status on your GS1920. Or you could change "Speed / Duplex" configuration in "Port Setup" from "Auto/1000" to "1000M/Full Duplex". With this configuration if the link drops dows you should investigate around cable/ phone

    Hope this can help

    Fred

  • liuck1975
    liuck1975 Posts: 8
    First Comment Friend Collector
    https://community.zyxel.com/en/discussion/comment/51011#Comment_51011

    Hi Fred, I think you are making a mistake. The orange LED indicates that
    the port is delivering current. The links on those ports are also
    gigabit. Tested directly by taking a laptop and connecting it to any of
    the Ethernet ports. The link turns on at 1000 mbps but there is no
    visual indication via led. On the other hand, if I connect a phone or
    any poe device to the port, only the orange led comes on.

  • Fred_77
    Fred_77 Posts: 120  Ally Member
    5 Answers First Comment Friend Collector Fourth Anniversary

    Gosh.. i fear something is missing there… 🤔

    As far as i know every port has 2 led: one for link/speed and one for poe indication as mentioned in user guide…

    1920-48HP.png

    I was referring to the link/act led status.

    So, no green light when you connect a laptop directly?

  • liuck1975
    liuck1975 Posts: 8
    First Comment Friend Collector
    edited April 2023
    https://community.zyxel.com/en/discussion/comment/51020#Comment_51020

    Correct. But I can reach and contact all the devices on my network
    (access points, servers, laptops, desktops, printers), all available. That's exactly what I can't understand. The interfaces are all active.
    The only thing I didn't do was connect the switch to the zyxel nebula
    cloud.

  • Zyxel_Melen
    Zyxel_Melen Posts: 2,577  Zyxel Employee
    Zyxel Certified Network Engineer Level 1 - Switch Zyxel Certified Network Administrator - Switch Zyxel Certified Network Administrator - Nebula Zyxel Certified Sales Associate
    edited April 2023 Answer ✓

    Hi @liuck1975,

    The GS1920-48HP has a PoE mode button on the right of the front panel.

    When it is on, the port LED will display the PoE status. When it is off, the port LED will display the link speed. I think this button is on now.

    image.png

    Zyxel Melen


  • liuck1975
    liuck1975 Posts: 8
    First Comment Friend Collector
    https://community.zyxel.com/en/discussion/comment/51023#Comment_51023

    Thank you, I will check immediately!!!🤞

Categories

Switch Help Center

EnglishTiếng ViệtРусскийไทย中文（台灣）