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● View a readable version of the TLVs.
debug lldp brief
● View a readable version of the TLVs plus a hexadecimal version of the entire LLDPDU, including unrecognized TLVs.
debug lldp detail
To stop viewing the LLDP TLVs sent and received by the system, use the no debug lldp command.
Figure 86. The debug lldp detail Command — LLDPDU Packet Dissection
Example of debug lldp Command Output with Unrecognized Reserved and Organizational Specific LLDP TLVs
The following is an example of LLDPDU with both (Reserved and Organizational specific) unrecognized TLVs.
DellEMC#Dec 4 22:38:27 : Received LLDP pkt on hundredGigE 1/1/1 of length 204 :
Dec 4 22:38:27 : Packet dump:
Dec 4 22:38:27 : 01 80 c2 00 00 0e 00 a0 c9 00 00 03 81 00 00 00
Dec 4 22:38:27 : 88 cc 02 07 04 00 a0 c9 00 00 01 04 02 05 54 06
Dec 4 22:38:27 : 02 01 2c fe 05 aa bb cc 04 61 fa 01 40 00 00 00
Dec 4 22:38:28 : 00 00 00 00 00 00 00 00 c6 0f ba 27
Dec 4 22:38:28 : TLV: Chassis ID, Len: 7, Subtype: Mac address (4) Value: 00:a0:c9:00:00:01
Dec 4 22:38:29 : TLV: Port ID, Len: 2, Subtype: Interface name (5) Value: T
Dec 4 22:38:29 : TLV: TTL, Len: 2, Value: 300
Dec 4 22:38:29 : TLV: UNKNOWN TLV, ORG_SPEC[aa-bb-cc, 4], Len: 1, Value:a
Dec 4 22:38:29 : aa bb cc 04 61
Dec 4 22:38:29 : 40
Dec 4 22:38:29 : TLV: UNKNOWN TLV, Type: 125 Len: 1, Value: @
Dec 4 22:38:29 : TLV: ENDOFPDU, Len: 0
Relevant Management Objects
Dell EMC Networking OS supports all IEEE 802.1AB MIB objects.
The following tables list the objects associated with:
● received and transmitted TLVs
● the LLDP configuration on the local agent
● IEEE 802.1AB Organizationally Specific TLVs
522
Link Layer Discovery Protocol (LLDP)