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longitude degrees is the angular distance from the intersection of the zero meridian. Positive values
indicate a location east of the prime meridian and negative numbers indicate a location west of the
prime meridian.
resolution bits specifies the precision of the value given for longitude. A smaller value increases the
area within which the device is located. For longitude resolution, enter a number between 1 and 34.
altitude floors number is the vertical elevation of a building above the ground, where 0 represents the
floor level associated with the ground level at the main entrance and larger values represent floors that
are above (higher in altitude) floors with lower values. For example, 2 for the 2nd floor. Sub-floors can
be represented by non-integer values. For example, a mezzanine between floor 1 and floor 2 could be
represented as 1.1. Similarly, the mezzanines between floor 4 and floor 5 could be represented as 4.1
and 4.2 respectively. Floors located below ground level could be represented by negative values.
resolution bits specifies the precision of the value given for altitude. A smaller value increases the area
within which the device is located. For floors resolution, enter the value 0 if the floor is unknown, or 30 if
a valid floor is being specified.
altitude meters number is the vertical elevation in number of meters, as opposed to floors.
resolution bits specifies the precision of the value given for altitude. A smaller value increases the area
within which the device is located. For meters resolution, enter a value from 0 to 30.
Datum is the map used as the basis for calculating the location. Specify one of the following:
• wgs84 - (geographical 3D) - World Geodesic System 1984, CRS Code 4327, Prime Meridian Name:
Greenwich
• nad83-navd88 - North American Datum 1983, CRS Code 4269, Prime Meridian Name: Greenwich;
The associated vertical datum is the North American Vertical Datum of 1988 (NAVD88). Use this
datum when referencing locations on land. If land is near tidal water, use nad83-mllw (below).
• nad83-mllw - North American Datum 1983, CRS Code 4269, Prime Meridian Name: Greenwich; The
associated vertical datum is mean lower low water (MLLW). Use this datum when referencing
locations on water, sea, or ocean.
Example coordinate-based location configuration
The following shows an example coordinate-based location configuration for the Sears Tower, at the
following location.
103rd Floor233 South Wacker DriveChicago, IL 60606
device(config)#lldp med location-id coordinate-based latitude 41.87884 resolution 18
longitude 87.63602 resolution 18 altitude floors 103 resolution 30 wgs84
The above configuration shows the following:
• Latitude is 41.87884 degrees north (or 41.87884 degrees).
• Longitude is 87.63602 degrees west (or 87.63602 degrees).
• The latitude and longitude resolution of 18 describes a geo-location area that is latitude 41.8769531
to latitude 41.8789062 and extends from -87.6367188 to -87.6347657 degrees longitude. This is an
area of approximately 373412 square feet (713.3 ft. x 523.5 ft.).
• The location is inside a structure, on the 103rd floor.
• The WGS 84 map was used as the basis for calculating the location.
Example coordinate-based location advertisement
The coordinate-based location advertisement will appear similar to the following on the remote device,
and in the CLI display output on the Brocade device (
show lldp local-info ).
+ MED Location ID
LLDP and LLDP-MED
FastIron Ethernet Switch Administration Guide 199
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