Cisco Nexus 5000 Series NX-OS Layer 2 Switching Configuration Guide, Release 4.2(1)N2(1)
Configuring LLDP
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Configuring LLDP

Configuring LLDP

This chapter describes the LLDP feature on the Cisco Nexus 5000 Series switches. It includes the following sections:

Configuring Global LLDP Commands

You can set global LLDP settings. These settings include the length of time before discarding LLDP information received from peers, the length of time to wait before performing LLDP initialization on any interface, and the rate at which LLDP packets are sent.

To configure LLDP settings, perform this task:

SUMMARY STEPS

1.    switch# configure terminal

2.    switch(config)# lldp {holdtime seconds | reinit seconds | timer seconds}

3.    switch(config)# no lldp {holdtime | reinit | timer}

4.    (Optional)switch#show lldp


DETAILED STEPS
  Command or Action Purpose
Step 1 switch# configure terminal
 

Enters configuration mode.

 
Step 2 switch(config)# lldp {holdtime seconds | reinit seconds | timer seconds}
 

Configures LLDP options.

Use the holdtime option to set the length of time (10 to 255 seconds, default 120 seconds) that a device should save LLDP information received before discarding it.

Use the reinit option to set the length of time (1 to 10 seconds, default 2 seconds) to wait before performing LLDP initialization on any interface.

Use the timer option to set the rate (5 to 254 seconds, default 30 seconds) at which LLDP packets are sent.

 
Step 3 switch(config)# no lldp {holdtime | reinit | timer}
 

Reset the LLDP values to their defaults.

 
Step 4 (Optional)switch#show lldp 

Displays LLDP configurations.

 

This example shows how to set LLDP timer option to 15 seconds:

switch# configure terminal
switch(config)# lldp timer 15
 

Configuring Interface LLDP Commands

To configure the LLDP feature for a physical Ethernet interface, perform this task:

SUMMARY STEPS

1.    switch# configure terminal

2.    switch(config)# interface type slot/port

3.    switch(config-if)# [no] lldp {receive | transmit}

4.    (Optional)switch#show lldp


DETAILED STEPS
  Command or Action Purpose
Step 1 switch# configure terminal
 

Enters configuration mode.

 
Step 2 switch(config)# interface type slot/port
 

Selects the interface to change.

 
Step 3 switch(config-if)# [no] lldp {receive | transmit}
 

Sets the selected interface to either receive or transmit.

The no form of the command disables the LLDP transmit or receive.

 
Step 4 (Optional)switch#show lldp 

Displays LLDP configurations.

 

This example shows how to set an interface to transmit LLDP packets:

switch# configure terminal
switch(config)# interface ethernet 1/2
switch(config-if)# lldp transmit
 

This example shows how to configure an interface to disable LLDP:

switch# configure terminal
switch(config)# interface ethernet 1/2
switch(config-if)# no lldp transmit
switch(config-if)# no lldp receive
 

This example shows how to display LLDP interface information:

switch# show lldp interface ethernet 1/2
tx_enabled: TRUE
rx_enabled: TRUE
dcbx_enabled: TRUE
Port MAC address:    00:0d:ec:a3:5f:48
Remote Peers Information
No remote peers exist
 

This example shows how to display LLDP neighbor information:

switch# show lldp neighbors
LLDP Neighbors
 
Remote Peers Information on interface Eth1/40
Remote peer's MSAP: length 12 Bytes:
00    c0    dd    0e    5f    3a    00    c0    dd    0e    5f    3a
 
LLDP TLV's
LLDP TLV type:Chassis ID  LLDP TLV Length: 7
LLDP TLV type:Port ID  LLDP TLV Length: 7
LLDP TLV type:Time to Live  LLDP TLV Length: 2
LLDP TLV type:LLDP Organizationally Specific  LLDP TLV Length: 55
LLDP TLV type:LLDP Organizationally Specific  LLDP TLV Length: 5
LLDP TLV type:END of LLDPDU  LLDP TLV Length: 0
 
Remote Peers Information on interface Eth1/34
Remote peer's MSAP: length 12 Bytes:
00    0d    ec    a3    27    40    00    0d    ec    a3    27    69
 
LLDP TLV's
LLDP TLV type:Chassis ID  LLDP TLV Length: 7
LLDP TLV type:Port ID  LLDP TLV Length: 7
LLDP TLV type:Time to Live  LLDP TLV Length: 2
LLDP TLV type:LLDP Organizationally Specific  LLDP TLV Length: 55
LLDP TLV type:LLDP Organizationally Specific  LLDP TLV Length: 5
LLDP TLV type:END of LLDPDU  LLDP TLV Length: 0
 
Remote Peers Information on interface Eth1/33
Remote peer's MSAP: length 12 Bytes:
00    0d    ec    a3    27    40    00    0d    ec    a3    27    68
 
LLDP TLV's
LLDP TLV type:Chassis ID  LLDP TLV Length: 7
LLDP TLV type:Port ID  LLDP TLV Length: 7
LLDP TLV type:Time to Live  LLDP TLV Length: 2
LLDP TLV type:LLDP Organizationally Specific  LLDP TLV Length: 55
LLDP TLV type:LLDP Organizationally Specific  LLDP TLV Length: 5
LLDP TLV type:END of LLDPDU  LLDP TLV Length: 0
 

This example shows how to display LLDP timer information:

switch# show lldp timers
LLDP Timers
holdtime 120 seconds
reinit 2 seconds
msg_tx_interval 30 seconds
 

This example shows how to display LLDP counters:

switch# show lldp traffic
LLDP traffic statistics:
 
    Total frames out: 8464
    Total Entries aged: 6
    Total frames in: 6342
    Total frames received in error: 2
    Total frames discarded: 2
    Total TLVs unrecognized: 0