Brocade BigIron RX Series Configuration Guide - Manual (Page 339)

BigIron RX Series Configuration Guide 261
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Configuring LLDP
9
• Cisco Discovery Protocol (CDP) and Foundry Discovery Protocol (FDP) run independently of
LLDP. Therefore, these discovery protocols can run simultaneously on the same device.
• By default, the Brocade 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 Brocade device forwards
• Ports that are in blocking mode (spanning tree) can still receive LLDP packets from a
forwarding port.
• To avoid trunk group configuration conflicts, a Syslog message is generated when individual
ports have been previously configured by LLDP.
• Auto-negotiation status indicates what is being advertised by the port for 802.3
auto-negotiation.
Enabling and disabling LLDP
LLDP is disabled by default on individual ports. To run LLDP, you must enable it on a global basis
(on the entire device) as well as on the individual ports
To enable LLDP globally, enter the following command at the global CONFIG level of the CLI.
BigIron RX(config)# lldp run
Syntax: [no] lldp run
Changing a port’s LLDP operating mode
LLDP packets are not exchanged until LLDP is enabled on a global basis. When LLDP is enabled on
a global basis, by default, each port on the Brocade device will be capable of transmitting and
receiving LLDP packets. You can disable a port’s ability to transmit and receive LLDP packets, or
change the operating mode to one of the following:
• Transmit LLDP information only
• Receive LLDP information only
You can configure a different operating mode for each port on the Brocade device. For example,
you could disable the receipt and transmission of LLDP packets on port e 2/1, configure port e 2/3
to only receive LLDP packets, and configure port e 2/5 to only transmit LLDP packets.
The following sections show how to change the operating mode.
Enabling and disabling receive and transmit mode
To disable the receipt and transmission of LLDP packets on individual ports, enter a command
such as the following at the Global CONFIG level of the CLI.
BigIron RX(config)# no lldp enable ports e 2/4 e 2/5
The above command disables LLDP on ports 2/4 and 2/5. These ports will not transmit nor
receive LLDP packets.
To enable LLDP on a port after it has been disabled, enter the following command.
BigIron RX(config)# lldp enable ports e 2/4
Syntax: [no] lldp enable ports ethernet <slotnum/portnum> | all