[systemd-devel] LLDP from Zyxel – "Operation not supported"

[Susant Sahani]

On Mon, 12 Jan 2015 13:23:40 +0530, Mantas Mikulėnas <grawity at gmail.com>  
wrote:

> I enabled LLDP receive for eth* in networkd. It recognizes outgoing  
> packets
> sent by lldpd (on the computer itself) and by ladvd (on pfSense), but
> chokes on incoming packets sent by a Zyxel switch:
>
>> LLDP: Receive frame failed: Operation not supported

The Zyxel switch sending port subtype as

Port Id Subtype: Locally assigned (7).

Currently supported port id are

LLDP_PORT_SUBTYPE_PORT_COMPONENT:
LLDP_PORT_SUBTYPE_INTERFACE_ALIAS:
LLDP_PORT_SUBTYPE_INTERFACE_NAME:
LLDP_PORT_SUBTYPE_MAC_ADDRESS:


We need to add the LLDP_PORT_SUBTYPE_LOCALLY_ASSIGNED   = 7.

>
> Attaching the actual packet.
>
> (By the way, `networkctl lldp` is a bit boring – it'd be more useful to
> show the SysName instead of the TTL...)
>

Susant