Configuration Options - ProCurve 6400cl Management And Configuration Manual

Configuring for Network Management Applications
LLDP (Link-Layer Discovery Protocol)
15-28
An intervening hub or repeater forwards the LLDP packets it receives in
■
the same manner as any other multicast packets it receives. Thus, two
LLDP switches joined by a hub or repeater handle LLDP traffic in the same
way that they would if directly connected.
■ Any intervening 802.1D device or Layer-3 device that is either LLDP-
unaware or has disabled LLDP operation drops the packet.

Configuration Options

Enable or Disable LLDP on the Switch. In the default configuration,
LLDP is globally enabled on the switch. To prevent transmission or receipt of
LLDP traffic, you can disable LLDP operation (page 15-28)
Enable or Disable LLDP-MED on 5300xl or 4200vl Switches. In the
default configuration for 5300xl switches running software release E.10.02 or
greater or 4200vl switches, LLDP-MED is enabled by default. (Requires that
LLDP is also enabled.) For more information, refer to "LLDP-MED (Media-
Endpoint-Discovery) for the 5300xl and 4200vl Switches" on page 15-44.
Change the Frequency of LLDP Packet Transmission to Neighbor
Devices. On a global basis, you can increase or decrease the frequency of
outbound LLDP advertisements (page 15-28).
Change the Time-To-Live for LLDP Packets Sent to Neighbors. On a
global basis, you can increase or decrease the time that the information in an
LLDP packet outbound from the switch will be maintained in a neighbor LLDP
device (page 15-28).
Transmit and Receive Mode. With LLDP enabled, the switch periodically
transmits an LLDP advertisement (packet) out each active port enabled for
outbound LLDP transmissions, and receives LLDP advertisements on each
active port enabled to receive LLDP traffic (page 15-41). Per-Port
configuration options include four modes:
■ Transmit and Receive (tx_rx): This is the default setting on all ports. It
enables a given port to both transmit and receive LLDP packets, and to
store the data from received (inbound) LLDP packets in the switch's MIB.
Transmit only (txonly): This setting enables a port to transmit LLDP
■
packets that can be read by LLDP neighbors. However, the port drops
inbound LLDP packets from LLDP neighbors without reading them. This
prevents the switch from learning about LLDP neighbors on that port.