Quick Reference Guide

544 PowerConnect B-Series TI24X Configuration Guide
53-1002269-02
Configuring LLDP
20
Configuring LLDP
This section describes how to enable and configure LLDP.
Table 95 lists the LLDP global-level tasks and the default behavior/value for each task.
Configuration notes and considerations
• LLDP is supported on Ethernet interfaces only.
• If a port is 802.1X-enabled, the transmission and reception of LLDP packets will only take
place while the port is authorized.
• Cisco Discovery Protocol (CDP) and Brocade Discovery Protocol (FDP) run independently of
LLDP. Therefore, these discovery protocols can run simultaneously on the same device.
• By default, the device limits the number of neighbors per port to four, and staggers the
transmission of LLDP packets on different ports, in order to minimize any high-usage spikes to
the CPU.
• Ports that are in blocking mode (spanning tree) can still receive LLDP packets from a
forwarding port.
• Auto-negotiation status indicates what is being advertised by the port for 802.3
auto-negotiation.
TABLE 95 LLDP global configuration tasks and default behavior /value
Global task Default behavior / value when LLDP is enabled
Enabling LLDP on a global basis Disabled
Specifying the maximum number of LLDP
neighbors per device
Automatically set to 392 neighbors per device
Specifying the maximum number of LLDP
neighbors per port
Automatically set to 4 neighbors per port
Enabling SNMP notifications and Syslog messages Disabled
Changing the minimum time between SNMP traps
and Syslog messages
Automatically set to 2 seconds when SNMP notifications and
Syslog messages for LLDP are enabled
Enabling and disabling TLV advertisements When LLDP transmit is enabled, by default, the device will
automatically advertise LLDP capabilities, except for the
system description, VLAN name, and power-via-MDI
information, which may be configured by the system
administrator.
Also, if desired, you can disable the advertisement of
individual TLVs.
Changing the minimum time between LLDP
transmissions
Automatically set to 2 seconds
Changing the interval between regular LLDP
transmissions
Automatically set to 30 seconds
Changing the holdtime multiplier for transmit TTL Automatically set to 4
Changing the minimum time between port
reinitializations
Automatically set to 2 seconds