Re: [lwip-users] Link Layer Discovery Protocol

[Simon Goldschmidt]

Robert Deschambault wrote:
> We use a very simple protocol internally where we send simple UDP messages 
> with xml tags
> so we can figure out what devices are on the network.  I was wondering if 
> there was a more
> standard way to do these things.  I like standards, especially open ones.

Note that LLDP is not an option here: switches that support LLDP must not 
forward these frames. As such, LLDP is only used to discover your direct link 
partner, not all devices on the subnet. This is in turn done by traversing SNMP 
nodes that provide information about their neighbours (received via LLDP).

I have not yet found an open protocol to implement local subnet device 
discovery (ideally with optional broadcast mode to detect devices that have 
no/invalid IP configuration).


Simon