Link Layer Discovery Protocol | 585Optional TLVsFTOS supports the following optional TLVs:• Management TLVs• IEEE 802.1 and 802.3 Organizationally Specific TLVs• TIA-1057 Organizationally Specific TLVsManagement TLVsA Management TLV is an Optional TLVs sub-type. This kind of TLV contains essential managementinformation about the sender. The five types are described in Table 26-2.Organizationally Specific TLVsOrganizationally specific TLVs can be defined by a professional organization or a vendor. They have twomandatory fields (Figure 26-3) in addition to the basic TLV fields (Figure 26-1):• Organizationally Unique Identifier (OUI)—a unique number assigned by the IEEE to an organizationor vendor.• OUI Sub-type—These sub-types indicate the kind of information in the following data field. Thesub-types are determined by the owner of the OUI.Figure 26-3. Organizationally Specific TLVIEEE Organizationally Specific TLVsEight TLV types have been defined by the IEEE 802.1 and 802.3 working groups (Table 26-2) as a basicpart of LLDP; the IEEE OUI is 00-80-C2. You can configure the Dell Force10 system to advertise any orall of these TLVs.Table 26-2. Optional TLV TypesType TLV DescriptionOptional TLVs4 Port description A user-defined alphanumeric string that describes the port. FTOS does notcurrently support this TLV.5 System name A user-defined alphanumeric string that identifies the system.6 System description A user-defined alphanumeric string that describes the systemTLV Type(127)TLV Length OrganizationallyUnique ID(OUI)OrganizationallyDefined Sub-typeOrganizationally SpecificDatafnC0052mp7 bits 9 bits 3 octets 1 octet 0 - 507 octets
