Configuration Notes And Considerations; Enabling And Disabling Lldp - Dell PowerConnect B-FCXs Configuration Manual

TABLE 123
Global task
Enabling and disabling TLV advertisements
Changing the minimum time between LLDP
transmissions
Changing the interval between regular LLDP
transmissions
Changing the holdtime multiplier for transmit TTL
Changing the minimum time between port
reinitializations

Configuration notes and considerations

•
•
•
•
•
•
•

Enabling and disabling LLDP

LLDP is enabled by default on individual ports. However, to run LLDP, you must first enable it on a
global basis (on the entire device).
To enable LLDP globally, enter the following command at the global CONFIG level of the CLI.
PowerConnect(config)#lldp run
Syntax: [no] lldp run
PowerConnect B-Series FCX Configuration Guide
53-1002266-01
LLDP global configuration tasks and default behavior /value (Continued)
LLDP is supported on Ethernet interfaces only.
If a port is 802.1X-enabled, the transmission and reception of LLDP packets will only take
place while the port is authorized.
Cisco Discovery Protocol (CDP) and Brocade Discovery Protocol (FDP) run independently of
LLDP. Therefore, these discovery protocols can run simultaneously on the same device.
By default, the Dell PowerConnect device limits the number of neighbors per port to four, and
staggers the transmission of LLDP packets on different ports, in order to minimize any
high-usage spikes to the CPU.
By default, the Dell PowerConnect device forwards
Ports that are in blocking mode (spanning tree) can still receive LLDP packets from a
forwarding port.
Auto-negotiation status indicates what is being advertised by the port for 802.3
auto-negotiation.
Configuring LLDP
Default behavior / value when LLDP is enabled
When LLDP transmit is enabled, by default, the Dell
PowerConnect device will automatically advertise LLDP
capabilities, except for the system description, VLAN name,
and power-via-MDI information, which may be configured by
the system administrator.
Also, if desired, you can disable the advertisement of
individual TLVs.
Automatically set to 2 seconds
Automatically set to 30 seconds
Automatically set to 4
Automatically set to 2 seconds
24
693