A UAFX Station transmitting LLDPDUs shall include the LLDP TLVs selected in this sub-clause. A UAFX Station receiving LLDPDUs shall process LLDPDUs and include the information in the LLDP Remote System’s YANG.
Each transmitted LLDPDU shall contain the following LLDP TLVs defined in IEEE 802.1AB-2016, 8.5:
- exactly one Chassis ID TLV, as defined in 220.127.116.11.4.2,
- exactly one Port ID TLV, as defined in 18.104.22.168.4.3,
- exactly one Time To Live TLV,
- exactly one System Capabilities TLV, as defined in chapter 22.214.171.124.4.4,
- one or more Management Address TLVs, as defined in 126.96.36.199.4.5, and
- zero or more additional TLVs not listed in this requirement.
NOTE The concatenation of the Chassis ID and Port ID fields enables the recipient of an LLDPDU to identify the sending LLDP agent/port.
The Chassis ID field shall contain the same value for all transmitted LLDPDUs independent from the transmitting port of the UAFX Station, i.e., be a non-volatile, UAFX Station-unique identifier.
The Chassis ID subtype field should contain subtype 4, indicating that the Chassis ID field contains a MAC address to achieve the Chassis ID's desired deployment-wide uniqueness. For UAFX Stations with multiple unique MAC addresses, any one of the UAFX Station’s MAC addresses may be used and shall be the same for all external ports of that UAFX Station.
The Port ID field shall contain the same value for all transmitted LLDPDUs for a given external port, i.e., be a non-volatile, UAFX Station-unique identifier of the LLDPDU-transmitting port.
The Port ID subtype field should contain subtype 5, indicating that the Port ID field contains the interface name (name) according to IETF RFC 8343.
A UAFX Station consisting of only one or more End Station Components shall set the system and enabled capabilities fields to Station Only (i.e., bit 8 set to “1”) for all transmitted LLDPDUs.
A UAFX Station with at least one End Station Component and at least one Bridge Component shall set the system and enabled capabilities fields to Station Only (i.e., bit 8 set to “1”) and C-VLAN component (i.e., bit 9 set to “1”) for all transmitted LLDPDUs.
NOTEThe combination of the Station Only and C-VLAN component flags is used as a marker indicating to the TDE that the internal structure of the UAFX Station consists of multiple components. This is a deliberate deviation from a footnote in IEEE Std 802.1AB2016, Table 8-4.
A UAFX Station shall announce at least one IPv4 address by which its management entity (see 7.2.2) can be reached.