Alcatel-Lucent 7750 Configuration Manual page 109

Interface Configuration
The implementation defaults to setting the port-id field in the LLDP OAMPDU to tx-local. This
encodes the port-id field as ifIndex (sub-type 7) of the associated port. This is required to support
some releases of SAM. SAM may use the ifIndex value to properly build the Layer Two Topology
Network Map. However, this numerical value is difficult to interpret or readily identify the LLDP
peer when reading the CLI or MIB value without SAM. Including the port-desc option as part of
the tx-tlv configuration allows an ALU remote peer supporting port-desc preferred display logic
(11.0r1) to display the value in the port description TLV instead of the port-id field value. This
does not change the encoding of the port-id field. That value continues to represent the ifIndex. In
some environments, it may be important to select the specific port information that is carried in the
port-id field. The operator has the ability to control the encoding of the port-id information and the
associated subtype using the port-id-subtype option. Three options are supported for the port-id-
subtype:
tx-if-alias — Transmit the ifAlias String (subtype 1) that describes the port as stored in the IF-
MIB, either user configured description or the default entry (ie 10/100/Gig ethernet SFP)
tx-if-name — Transmits the ifName string (subtype 5) that describes the port as stored in the IF-
MIB, ifName info.
tx-local — The interface ifIndex value (subtype 7)
IPv6 (address subtype 2) and IPv4 (address subtype 1) LLDP System Management addresses are
supported.
7750 SR Interface Configuration Guide Page 109