Link Layer Discovery Protocol (LLDP) | 169Organizationally Specific TLVsOrganizationally specific TLVs can be defined by a professional organization or a vendor. They have twomandatory fields (Figure 14-3) in addition to the basic TLV fields (Figure 14-1):• 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 14-3. Organizationally Specific TLVIEEE Organizationally Specific TLVsEight TLV types have been defined by the IEEE 802.1 and 802.3 working groups (Table 14-2) as a basicpart of LLDP; the IEEE OUI is 00-80-C2. You can configure an Aggregator to advertise any or all of theseTLVs.Table 14-2. 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 system.7 System capabilities An optional TLV that identifies the primary functions of the system andwhether or not these primary functions are enabled; for example, repeater,bridge, WLAN access point, router, telephone, DOCSIS cable device, endstation only).8 Management address Indicates the network address of the management interface. FTOS does notcurrently support this TLV.IEEE 802.1 Organizationally Specific TLVs127 Port-VLAN ID On Dell Force10 systems, indicates the untagged VLAN to which a portbelongs.127 Port and Protocol VLAN ID On Dell Force10 systems, indicates the tagged VLAN to which a port belongs(and the untagged VLAN to which a port belongs if the port is in hybrid mode).127 VLAN Name Indicates the user-defined alphanumeric string that identifies the VLAN.127 Protocol Identity Indicates the protocols that the port can process. FTOS does not currentlysupport this TLV.TLV Type(127)TLV Length OrganizationallyUnique ID(OUI)OrganizationallyDefined Sub-typeOrganizationally SpecificDatafnC0052mp7 bits 9 bits 3 octets 1 octet 0 - 507 octets
