Reference Guide

Link Layer Discovery Protocol (LLDP) | 169
Organizationally Specific TLVs
Organizationally specific TLVs can be defined by a professional organization or a vendor. They have two
mandatory 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 organization
or vendor.
• OUI Sub-type—These sub-types indicate the kind of information in the following data field. The
sub-types are determined by the owner of the OUI.
Figure 14-3. Organizationally Specific TLV
IEEE Organizationally Specific TLVs
Eight TLV types have been defined by the IEEE 802.1 and 802.3 working groups (Table 14-2) as a basic
part of LLDP; the IEEE OUI is 00-80-C2. You can configure an Aggregator to advertise any or all of these
TLVs.
Table 14-2. Optional TLV Types
Type TLV Description
Optional TLVs
4 Port description A user-defined alphanumeric string that describes the port. FTOS does not
currently 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 and
whether or not these primary functions are enabled; for example, repeater,
bridge, WLAN access point, router, telephone, DOCSIS cable device, end
station only).
8 Management address Indicates the network address of the management interface. FTOS does not
currently support this TLV.
IEEE 802.1 Organizationally Specific TLVs
127 Port-VLAN ID On Dell Force10 systems, indicates the untagged VLAN to which a port
belongs.
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 currently
support this TLV.
TLV Type
(127)
TLV Length
Organizationally
Unique ID
(OUI)
Organizationally
Defined Sub-type
Organizationally Specific
Data
fnC0052m
p
7 bits
9 bits
3 octets
1 octet 0 - 507 octets