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PowerConnect B-Series FCX Configuration Guide 695
53-1002266-01
Configuring LLDP
24
NOTE
When a port is configured to both receive and transmit LLDP packets and the MED capabilities TLV
is enabled, LLDP-MED is enabled as well. LLDP-MED is not enabled if the operating mode is set to
receive only or transmit only.
Enabling and disabling receive only mode
When LLDP is enabled on a global basis, by default, each port on the Dell PowerConnect device will
be capable of transmitting and receiving LLDP packets. To change the LLDP operating mode from
receive and transmit mode to receive only mode, simply disable the transmit mode. Enter a
command such as the following at the Global CONFIG level of the CLI.
PowerConnect(config)#no lldp enable transmit ports e 2/4 e 2/5 e 2/6
The above command changes the LLDP operating mode on ports 2/4, 2/5, and 2/6 from transmit
and receive mode to receive only mode.
To change a port LLDP operating mode from transmit only to receive only, first disable the transmit
only mode, then enable the receive only mode. Enter commands such as the following.
PowerConnect(config)#no lldp enable transmit ports e 2/7 e 2/8 e 2/9
PowerConnect(config)#lldp enable receive ports e 2/7 e 2/8 e 2/9
The above commands change the LLDP operating mode on ports 2/7, 2/8, and 2/9, from transmit
only to receive only. Note that if you do not disable the transmit only mode, you will configure the
port to both transmit and receive LLDP packets.
NOTE
LLDP-MED is not enabled when you enable the receive only operating mode. To enable LLDP-MED,
you must configure the port to both receive and transmit LLDP packets. Refer to “Enabling and
disabling receive and transmit mode” on page 694.
Syntax: [no] lldp enable receive ports ethernet <port-list> | all
Use the [no] form of the command to disable the receive only mode.
For <port-list>, specify the ports in the following formats:
• PowerConnect B-Series FCX stackable switches – <stack-unit/slotnum/portnum>
You can list all of the ports individually, use the keyword to to specify ranges of ports, or a
combination of both. To apply the configuration to all ports on the device, use the keyword all
instead of listing the ports individually.
Enabling and Disabling Transmit Only Mode
When LLDP is enabled on a global basis, by default, each port on the Dell PowerConnect device will
be capable of transmitting and receiving LLDP packets. To change the LLDP operating mode to
transmit only mode, simply disable the receive mode. Enter a command such as the following at
the Global CONFIG level of the CLI.
PowerConnect(config)#no lldp enable receive ports e 2/4 e 2/5 e 2/6
The above command changes the LLDP operating mode on ports 2/4, 2/5, and 2/6 from transmit
and receive mode to transmit only mode. Any incoming LLDP packets will be dropped in software.
To change a port LLDP operating mode from receive only to transmit only, first disable the receive
only mode, then enable the transmit only mode. For example, enter commands such as the
following at the Global CONFIG level of the CLI.