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LLDP global configuration tasks and default behavior /value (Continued) TABLE 23
Global task Default behavior / value when LLDP is enabled
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 Brocade
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
LLDP 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 Brocade 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.
• By default, the Brocade device forwards LLDP packets even though LLDP is not configured on the
device. This ensures consistency with other protocols and allows transparent forwarding, though it
amounts to noncompliance with IEEE Standards.
• 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.
Enabling and disabling LLDP
LLDP is enabled by default on individual ports. However, to run LLDP, you must first enable it on a
global basis (on the entire device).
LLDP configuration notes and considerations
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