Technical data

BLADE OS 5.1 Application Guide
BMD00136, November 2009 Chapter 6: Link Layer Discovery Protocol
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If SNMP trap notification is enabled, the notification messages can also appear in the system log.
This is enabled by default. To change whether the SNMP trap notifications for LLDP events appear
in the system log, use the following commands:
Changing the LLDP Transmit State
When the port is disabled, or when LLDP transmit is turned off for the port using the admstat
command’s rx_only or disabled options (see “Transmit and Receive Control” on page 88), a
final LLDP packet is transmitted with a time-to-live value of 0. Neighbors that receive this packet
will remove the LLDP information associated with the G8000 port from their MIB.
In addition, if LLDP is fully disabled on a port (using admstat disabled) and later re-enabled,
the G8000 will temporarily delay resuming LLDP transmissions on the port in order to allow the
port LLDP information to stabilize. The reinitialization delay interval can be globally configured
for all ports using the following command:
where interval is the number of seconds to wait before resuming LLDP transmissions. The range is
between 1 and 10. The default is 2 seconds.
Types of Information Transmitted
When LLDP transmission is permitted on the port (see “Enabling or Disabling LLDP” on page 88),
the port advertises the following required information in type/length/value (TLV) format:
 Chassis ID
 Port ID
 LLDP Time-to-Live
>> # logging log lldp (Add LLDP notification to Syslog)
or
>> # no logging log lldp (Do not log LLDP notifications)
>> # lldp reinit-delay <interval>