GS116EP and Cisco Switch Trunk Issue

tty0746 wrote:

C9300 interface config:

switchport trunk allowed vlan 1,10,20,30,40,50

switchport mode trunk

switchport nonegotiate

 

The trunk port on the GS116EP (or for the sake of it on any other switch model) is to define all these VLAN 1,10,20,30,40, and 50 as [T]agged - thaths what you hace defined on the C9300 at least. A trunk does essentiually always carry each VLAN in tagged from.

 

Disabling the Cisco proprietary Dynamic Trunking Protocol (DTP)  and Cisco Inter-Switch Link (ISL) - this is what the 

switchport nonegotiate does - is key.

 

tty0746 wrote:

GS116EP config:

port 1 is connected to the C9300
vlan 1 is untagged (C9300 native vlan ID)
vlans 10,20,30,40,50 are tagged
PVID is set to 1

 

If the intention is to operate the VLAN 1 as untagged (like an access port), including VLAN 1 to be trunk allowed is meaningless. But for simplicity it makes sense (so you can connect any computer adapter here without addiotional local configuration.

 

That far nothing wrong or forgotten about here.

 

So what is the effective problem you are working on here please?

 

Have some access ports and/or combined trunk and access ports eg. to connect wireless access points or the like?