System Capabilities Tlv; Management Address Tlv; System Description Tlv; Ieee 802.3 Mac/Phy Configuration/Status Tlv - Cisco 8800 Series Administration Manual

System Capabilities TLV

System Capabilities TLV
For the outgoing LLDPDU, in the System Capabilities TLV, the bit values for the 2 octet system capabilities
fields should be set for Bit 2 (Bridge) and Bit 5 (Phone) for a phone with a PC port. If the phone does not
have a PC port, only Bit 5 should be set. The same system capability value should be set for the enabled
capability field.
For the incoming LLDPDU, the System Capabilities TLV is ignored. The TLV is not validated semantically
against the MED device type.
The System Capabilities TLV is mandatory for outgoing LLDPDUs. Only one System Capabilities TLV is
allowed.

Management Address TLV

The TLV identifies an address associated with the local LLDP agent (that may be used to reach higher layer
entities) to assist discovery by network management. The TLV allows the inclusion of both the system interface
number and an object identifier (OID) that are associated with this management address, if either or both are
known.
• TLV information string length—This field contains the length (in octets) of all the fields in the TLV
• Management address string length—This field contains the length (in octets) of the management address

System Description TLV

The TLV allows the network management to advertise the system description.
• TLV information string length—This field indicates the exact length (in octets) of the system description.
• System description—This field contains an alphanumeric string that is the textual description of the

IEEE 802.3 MAC/PHY Configuration/Status TLV

The TLV is not for autonegotiation, but for troubleshooting purposes. For the incoming LLDPDU, the TLV
is ignored and not validated. For the outgoing LLDPDU, for the TLV, the octet value autonegotiation
support/status should be:
• Bit 0—Set to 1 to indicate that the autonegotiation support feature is supported.
• Bit 1—Set to 1 to indicate that autonegotiation status is enabled.
• Bit 2-7—Set to 0.
The bit values for the 2 octets PMD autonegotiation advertised capability field should be set to:
• Bit 13—10BASE-T half duplex mode
• Bit 14—10BASE-T full duplex mode
• Bit 11—100BASE-TX half duplex mode
Cisco IP Phone 8800 Series Multiplatform Phones Administration Guide
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information string.
subtype + management address fields.
network entity. The system description includes the full name and version identification of the system
hardware type, software operating system, and networking software. If implementations support IETF
RFC 3418, the sysDescr object should be used for this field.
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