Installation manual

3-210
SIGNAMAX LLC • www.signamax.eu
Configuring LLDP Interface Attributes
Use the LLDP Port/Trunk Configuration to specify the message attributes for individual
interfaces, including whether messages are transmitted, received, or both transmitted and
received, whether SNMP notifications are sent, and the type of information advertised.
Command Attributes
• Admin Status – Enables LLDP message transmit and receive modes for LLDP Protocol
Data Units. (Options: Tx only, Rx only, TxRx, Disabled; Default: TxRx)
• SNMP Notification – Enables the transmission of SNMP trap notifications about LLDP
and LLDP-MED changes. (Default: Enabled)
This option sends out SNMP trap notifications to designated target stations at the
interval specified by the Notification Interval in the preceding section. Trap notifications
include information about state changes in the LLDP MIB (IEEE 802.1AB), the
LLDP-MED MIB (ANSI/TIA-1057), or vendor-specific LLDP-EXT-DOT1 and
LLDP-EXT-DOT3 MIBs.
For information on defining SNMP trap destinations, see “Specifying Trap Managers
and Trap Types” on page 3-41.
Information about additional changes in LLDP neighbors that occur between SNMP
notifications is not transmitted. Only state changes that exist at the time of a trap
notification are included in the transmission. An SNMP agent should therefore
periodically check the value of lldpStatsRemTableLastChangeTime to detect any
lldpRemTablesChange notification-events missed due to throttling or transmission loss.
• TLV Type – Configures the information included in the TLV field of advertised
messages.
- Port Description – The port description is taken from the ifDescr object in RFC 2863,
which includes information about the manufacturer, the product name, and the
version of the interface hardware/software.
- System Description – The system description is taken from the sysDescr object in
RFC 3418, which includes the full name and version identification of the system's
hardware type, software operating system, and networking software.
- Management Address – The management address protocol packet includes the
IPv4 address of the switch. If no management address is available, the address
should be the MAC address for the CPU or for the port sending this advertisement.
The management address TLV may also include information about the specific
interface associated with this address, and an object identifier indicating the type of
hardware component or protocol entity associated with this address. The interface
number and OID are included to assist SNMP applications in the performance of
network discovery by indicating enterprise specific or other starting points for the
search, such as the Interface or Entity MIB.
Since there are typically a number of different addresses associated with a Layer 3
device, an individual LLDP PDU may contain more than one management address
TLV.
Every management address TLV that reports an address that is accessible on a port
and protocol VLAN through the particular port should be accompanied by a port and