vlan over Lacp

Domdas

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

Sakura_T

You should also set PVID 20 for port 1 of switch 3 in order to reach VLAN 20 interface on the router.

Domdas

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

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

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.