Dell PowerEdge XL 5133-4 MXL 10/40GbE Switch IO Module FTOS Command Reference - Page 182

www.dell.com | support.dell.com There are five types of TLVs (Table 14-1). All types are mandatory in the construction of an LLDPDU except Optional TLVs. You can configure the inclusion of individual Optional TLVs. Table 14-1. Type, Length, Value (TLV) Types Type TLV 0 End of LLDPDU 1 Chassis ID 2 Port ID 3 Time to Live - Optional Description Marks the end of an LLDPDU. The Chassis ID TLV is a mandatory TLV that identifies the chassis containing the IEEE 802 LAN station associated with the transmitting LLDP agent. The Port ID TLV is a mandatory TLV that identifies the port component of the MSAP identifier associated with the transmitting LLDP agent. The Time To Live TLV indicates the number of seconds that the recipient LLDP agent considers the information associated with this MSAP identifier to be valid. Includes sub-types of TLVs that advertise specific configuration information. These sub-types are Management TLVs, IEEE 802.1, IEEE 802.3, and TIA-1057 Organizationally Specific TLVs. Figure 14-2. LLDPDU Frame Preamble Start Frame Destination MAC Source MAC Delimiter (01:80:C2:00:00:0E) Ethernet Type (0x88CC) LLDPDU Padding FCS TLV 1 Chassis ID TLV 2 Port ID TLV 3 Port Description TLV 4 TLV 5 TLV 6 TLV 7 TLV 127 TLV 0 System Name System Description System Capabilities Management Addr Organizationally Specific End of LLDPDU fnC0047mp Optional TLVs The Dell Force10 operating software (FTOS) supports the following optional TLVs: • Management TLVs • IEEE 802.1 and 802.3 Organizationally Specific TLVs • TIA-1057 Organizationally Specific TLVs Management TLVs A Management TLV is an Optional TLVs sub-type. This kind of TLV contains essential management information about the sender. The five types are described in Table 14-2. 168 | Link Layer Discovery Protocol (LLDP)