Web Management Guide

Table Of Contents
Chapter 12
| Basic Administration Protocols
Link Layer Discovery Protocol
– 334
Configuring LLDP
Interface Attributes
Use the Administration > LLDP (Configure Interface – Configure General) page 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.
Parameters
These parameters are displayed:
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” on page 372.
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.
MED Notification
– Enables the transmission of SNMP trap notifications about
LLDP-MED changes in remote neighbors. (Default: Disabled)
Basic Optional TLVs
– Configures basic information included in the TLV field of
advertised messages.
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. (Default: Enabled)
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.