Disable sending LLDP to ISP over fiber link

peos42

Hi

Sorry for my intensive posting. I am new on modern Zyxel switches and syntax differs a little bit against what I am used to :) Trying to make sure the new Zyxel switch will do what I expect it to before make it production active.

Instead of doing this on the fiber port interface to the ISP…

no lldp basic-tlv management-address
no lldp basic-tlv port-description
no lldp basic-tlv system-capabilities
no lldp basic-tlv system-description
no lldp basic-tlv system-name
no lldp org-specific-tlv dot1 port-vlan-id
no lldp org-specific-tlv dot3 mac-phy

can I use...

lldp admin-status rx-only

or

lldp admin-status disabled

And be *sure* no lldp is sent out to the ISP?

Tnx in advance

//Peo

Zyxel_Kay

Hi @peos42

Yes, you can use the lldp admin-status rx-only command to configure the interface to only receive LLDP packets, or lldp admin-status disabled to ensure that the interface neither sends nor receives LLDP packets. Both options will prevent LLDP packets from being sent to your ISP.

If you prefer a graphical approach, you can adjust these settings via the web interface. Simply navigate to PORT > LLDP > LLDP Setup to modify the LLDP configuration for the specific interface.

Zyxel_Kay

Hi @peos42

Yes, you can use the lldp admin-status rx-only command to configure the interface to only receive LLDP packets, or lldp admin-status disabled to ensure that the interface neither sends nor receives LLDP packets. Both options will prevent LLDP packets from being sent to your ISP.

If you prefer a graphical approach, you can adjust these settings via the web interface. Simply navigate to PORT > LLDP > LLDP Setup to modify the LLDP configuration for the specific interface.

peos42

Tnx for the reply. I was a little bit confused because it was named "no lldp" on the switch level, but on the interface level the ekvivalent was "lldp admin-status disabled".

But I will probably go for just receiving with "lldp admin-status rx-only" from the ISP on the fiber port :)

Tnx @Zyxel_Kay

Zyxel_Kay

Hi @peos42

On the interface level, there are four options for the LLDP admin status: disabled, tx-only, rx-only, and tx-rx. Using the command lldp admin-status disabled disables LLDP entirely for that specific interface.

At the switch level, however, the no lldp command is used to disable the LLDP function globally for the entire switch.

I hope this clears up the confusion! Feel free to reach out if you have any more questions.

peos42

Yes. Now it is clear to me. It is just ZynOS that confuses me a bit. I would have expected "no lldp" on the interface level as well and not a different syntax like "lldp admin-status disabled" as it has the same meaning as "no lldp". I think disabling it on the switch and the interface would be the same syntax.

I also had problem to find "shutdown" and "no shutdown" on the interface, but just after looking for it, I saw you named if differently (inactive).

But… I am getting used to it. Working on it 🙂

Tnx