User manual

APS User Manual
135
1.2.8 LLDP
LLDP enables Ethernet network devices, such as switches and routers, to transmit and/or receive
device-related information to or from directly connected devices on the network, and to store such
information learned about other devices. The data sent and received by LLDP is useful for many
reasons. The switch can discover neighbours—other devices directly connected to it. Devices can use
LLDP to advertise some parts of their Layer 2 configuration to their neighbours, enabling some kinds
of misconfiguration to be more easily detected and corrected.
LLDP is a link level (“one hop”) protocol; LLDP information can only be sent to and received from
devices that are directly connected to each other, or connected via a hub or repeater. Advertised
information is not forwarded on to other devices on the network.
The information transmitted in LLDP advertisements flows in one direction only, from one device to
its neighbours, and the communication ends there. Transmitted advertisements do not solicit
responses, and received advertisements do not solicit acknowledgement.
LLDP operates over physical ports (Layer 2) only. For example, it can be configured on switch ports
that belong to static or dynamic aggregated links (channel groups), but not on the aggregated links
themselves; and on switch ports that belong to VLANs, but not on the VLANs themselves.
1.2.8-1 LLDP Configuration
This section is used to enable and configure LLDP on the APS Series switches.
Web Interface
To configure the LLDP parameters via the Web Interface:
1. Click Configuration, LLDP and LLDP Configuration.
2. Modify any LLDP timing parameters if needed.
3. Disable, enable two way communication, Tx only or Rx only on a per port basis.
4. Specify the information to include in the TLV field of advertised messages.
5. Click the Apply button to save your changes or the Reset button to revert to previous
settings.