Spanning-tree blocking
Spanning tree does not prevent LLDP packet transmission or receipt on STP-blocked links.
802.1X blocking
Ports blocked by 802.1X operation do not allow transmission or receipt of LLDP packets.
Configuring LLDP operation
Displaying the global LLDP, port admin, and SNMP notification status (CLI)
In the default configuration, LLDP is enabled and in both transmit and receive mode on all active ports. The LLDP
configuration includes global settings that apply to all active ports on the switch, and per-port settings that affect
only the operation of the specified ports.
The commands in this section affect both LLDP and LLDP-MED operation. for information on operation and
configuration unique to LLDP-MED, refer to “LLDP-MED (Media-Endpoint-Discovery)”.
Syntax:
show lldp config
Displays the LLDP global configuration, LLDP port status, and SNMP notification status. For information on port
admin status, see
Configuring per-port transmit and receive modes (CLI)
on page 228.
show lldp config
produces the following display when the switch is in the default LLDP configuration:
Viewing the general LLDP configuration
switch(config)# show lldp config
LLDP Global Configuration
LLDP Enabled [Yes] : Yes
LLDP Transmit Interval [30] : 30
LLDP Hold time Multiplier [4] : 4
LLDP Delay Interval [2] : 2
LLDP Reinit Interval [2] : 2
LLDP Notification Interval [5] : 5
LLDP Fast Start Count [5] : 5
LLDP Port Configuration
Port | AdminStatus NotificationEnabled Med Topology Trap Enabled
---- + ----------- ------------------- -------------------------
A1 | Tx_Rx False False
A2 | Tx_Rx False False
A3 | Tx_Rx False False
A4 | Tx_Rx False False
A5 | Tx_Rx False False
A6 | Tx_Rx False False
A7 | Tx_Rx False False
A8 | Tx_Rx False False
NOTE:
The values displayed in the LLDP column correspond to the
lldp refresh-interval
command
Chapter 7 Configuring for Network Management Applications
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