Brocade FastIron Ethernet Switch Administration Guide - Manual (Page 189)

Defining a location id
The LLDP-MED Location Identification extension enables the Brocade device to set the physical
location that an attached Class III Endpoint will use for location-based applications. This feature is
important for applications such as IP telephony, for example, where emergency responders need to
quickly determine the physical location of a user in North America that has just dialed 911.
For each port, you can define one or more of the following location ID formats:
• Geographic location (coordinate-based)
• Civic address
• Emergency Call Services (ECS) Emergency Location Identification Number (ELIN)
The above location ID formats are defined in the following sections.
Coordinate-based location
Coordinate-based location is based on the IETF RFC 3825 [6] standard, which specifies a Dynamic
Host Configuration Protocol (DHCP) option for the coordinate-based geographic location of a client.
When you configure an Endpoint location information using the coordinate-based location, you specify
the latitude, longitude, and altitude, along with resolution indicators (a measure of the accuracy of the
coordinates), and the reference datum (the map used for the given coordinates).
To configure a coordinate-based location for an Endpoint device, enter a command such as the
following at the Global CONFIG level of the CLI.
device(config)#lldp med location-id coordinate-based latitude
-78.303 resolution 20 longitude 34.27 resolution 18 altitude meters 50 resolution 16
wgs84
Syntax: [no] lldp med location-id coordinate-based latitude degrees resolution bits longitude
degrees resolution bits altitude floors number resolution bits | meters number resolution bits datum
latitude degrees is the angular distance north or south from the earth equator measured through 90
degrees. Positive numbers indicate a location north of the equator and negative numbers indicate a
location south of the equator.
resolution bits specifies the precision of the value given for latitude. A smaller value increases the area
within which the device is located. For latitude, enter a number between 1 and 34.
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.
Defining a location id
FastIron Ethernet Switch Administration Guide 189
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