PLANET SGSW-24040 - Manual (Page 292)

User’s Manual of SGSW-24040 / 24240 Series
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With this in mind LLDP-MED defines an LLDP-MED Fast Start interaction
between the protocol and the application layers on top of the protocol, in order to
achieve these related properties. Initially, a Network Connectivity Device will only
transmit LLDP TLVs in an LLDPDU. Only after an LLDP-MED Endpoint Device is
detected, will an LLDP-MED capable Network Connectivity Device start to
advertise LLDP-MED TLVs in outgoing LLDPDUs on the associated port. The
LLDP-MED application will temporarily speed up the transmission of the
LLDPDU to start within a second, when a new LLDP-MED neighbor has been
detected in order share LLDP-MED information as fast as possible to new
neighbors.
Because there is a risk that a LLDP frame being lost during transmission
between neighbors, it is recommended to repeat the fast start transmission
multiple times to increase the possibility for that the neighbors has received the
LLDP frame. With Fast start repeat count it is possible to specify the number of
times the fast start transmission is repeated. The recommended value is 4 times,
giving that 4 LLDP frames with a 1 second interval will be transmitted, when a
LLDP frame with new information is received.
It should be noted that LLDP-MED and the LLDP-MED Fast Start mechanism is
only intended to run on links between LLDP-MED Network Connectivity Devices
and Endpoint Devices, and as such does not apply to links between LAN
infrastructure elements, including between Network Connectivity Devices, or to
other types of links.
Coordinates Location
Object Description
• Latitude
Latitude SHOULD be normalized to within 0-90 degrees with a maximum of 4
digits.
It is possible to specify the direction to either North of the equator or South of the
equator.
• Longitude Longitude SHOULD be normalized to within 0-180 degrees with a maximum of 4
digits.
It is possible to specify the direction to either East of the prime meridian or West
of the prime meridian.
• Altitude
Altitude SHOULD be normalized to within -32767 to 32767 with a maximum of 4
digits.
It is possible to select between two altitude types (floors or meters).
Meters: Representing meters of Altitude defined by the vertical datum specified.
Floors: Representing altitude in a form more relevant in buildings which have