vlan over Lacp

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Domdas
Domdas Posts: 2
First Comment
edited August 2022 in Switch
hello, my scenario is :
switch 1 gs 1920
              -port 26, 25,9,10 vlan20 fixed tagging
              -port 26 to router
              -port 6 vlan20 fixed untag
              -port 25, 9 ,10 LACP link aggregation to switch 2 
switch 2 gs 1900-24e
        - port 5,6,7 LACP link aggregation to switch1 , vlan trunking
        - port 21,22,23 LACP link aggregation to switch3 , , vlan trunking

switch 3 gs 1920
              -port 25, 26, 27  vlan20 fixed tagging
              -port 1 vlan20 fixed untag
              -port 25, 26, 27  LACP link aggregation to switch 2

problem :
no connection from port 1 switch 3 to router, everything else works great
thanks for help Dominik




All Replies

  • Sakura_T
    Sakura_T Posts: 101  Ally Member
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    You should also set PVID 20 for port 1 of switch 3 in order to reach VLAN 20 interface on the router.
  • Domdas
    Domdas Posts: 2
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    thank you Sakura , i forgot to write it
    update:
    PVID 20 for port 1 switch 3 and port 6 switch 1 was already set it
  • Zyxel_Melen
    Zyxel_Melen Posts: 1,649  Zyxel Employee
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    edited March 2021
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    Hi @Domdas,

    Welcome to Zyxel community!

    According to your description, i draw a topology below, could you check if my topology is same as yours?

    If yes, could you do a test is that try to sequentially ping Switch 3, 1 from client and share us the result?
    By the way, kindly ask what device is port 6 switch 1 connect to?

    Zyxel Melen

  • Zyxel_Melen
    Zyxel_Melen Posts: 1,649  Zyxel Employee
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    Hi @Domdas,

    I would like to notice VLAN trunking in GS1900 is different to GS1920.
    You need to enable VLAN trunking on port LAG when you use LACP.  You can see the example below.


    Zyxel Melen