H3C Technologies H3C S3600 Series Switches - Manual (Page 1159)

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As the maximum TTL allowed by CDP is 255 seconds, ensure that the product of the TTL multiplier and
the LLDPDU transmit interval is less than 255 seconds for CDP-compatible LLDP to work properly with
Cisco IP phones. You can use related commands to configure the TTL multiplier and the LLDPDU
transmit interval. For details, see Setting Other LLDP Parameters .
Configuring LLDP Trapping
LLDP trapping is used to notify the network management system (NMS) of events such as new
neighboring devices detected and link malfunctions.
To prevent excessive LLDP traps from being sent when topology is unstable, you can set a minimum
trap sending interval for LLDP.
Follow these steps to configure LLDP trapping:
To do… Use the command… Remarks
Enter system view system-view —
Enter Ethernet interface view
interface interface-type
interface-number
Required
Enable LLDP trap sending
lldp notification remote-change
enable Required
Disabled by default
Quit to system view quit —
Set the interval to send LLDP
traps lldp timer notification-interval
interval Optional
5 seconds by default
Displaying and Maintaining LLDP
To do… Use the command… Remarks
Display the global LLDP
information or the information
contained in the LLDP TLVs to
be sent through a port
display lldp local-information
[ global | interface interface-type
interface-number ]
Available in any view
Display the information
contained in the LLDP TLVs
sent from neighboring devices display lldp neighbor-information
[ interface interface-type
interface-number ] [ brief ]
Available in any view
Display LLDP statistics
display lldp statistics [ global |
interface interface-type
interface-number ]
Available in any view
Display LLDP status of a port
display lldp status [ interface
interface-type interface-number ]
Available in any view
Display types of advertisable
optional LLDP TLVs display lldp tlv-config [ interface
interface-type interface-number ]
Available in any view