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If DCBX is down on the receiving interface
The organizational specific TLV list is limited to store 256 entries per neighbor. If TLV entries are more than 256, then the oldest
entry (of that neighbor) in the list is replaced. A syslog message appears when the organization specific unrecognized TLV list
exceeds more than 205 entries (80 percent of 256) for you to take action. Following shows the syslog message:
Nov 14 03:01:53 %STKUNIT2-M:CP %LLDP-5-LLDP_ORG_UNRECOGNISED_TLV_MAX: Received
Organizational Specific unrecognised TLVs exceeds threshold (205) from Remote Chassis
ID: 4c:76:25:f4:ab:00, Remote Port ID: fortyGigE 1/2/8/1 on interface: Te 2/31/1
Viewing Unrecognized LLDP TLVs
You can view or retrieve the stored unrecognized (reserved and organizational specific) TLVs using the show lldp
neighbor details command.
View all the LLDP TLV information including unrecognized TLVs, using the snmpwalk and snmpget commands.
Viewing the LLDP Configuration
To view the LLDP configuration, use the following command.
Display the LLDP configuration.
CONFIGURATION or INTERFACE mode
show config
Example of Viewing LLDP Global Configurations
R1(conf)#protocol lldp
R1(conf-lldp)#show config
!
protocol lldp
advertise dot3-tlv max-frame-size
advertise management-tlv system-capabilities system-description
hello 10
no disable
R1(conf-lldp)#
Example of Viewing LLDP Interface Configurations
R1(conf-lldp)#exit
R1(conf)#interface tengigabitethernet 0/3
R1(conf-if-te-0/3)#show config
!
interface tengigabitEthernet 0/3
switchport
no shutdown
R1(conf-if-te-0/3)#protocol lldp
R1(conf-if-te-0/3-lldp)#show config
!
protocol lldp
R1(conf-if-te-0/3-lldp)#
Viewing Information Advertised by Adjacent LLDP
Agents
To view brief information about adjacent devices or to view all the information that neighbors are advertising, use the following
commands.
Display brief information about adjacent devices.
show lldp neighbors
Link Layer Discovery Protocol (LLDP)
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