Technical data

214 FastIron Ethernet Switch Administration Guide
53-1002637-02
LLDP-MED configuration
8
Changing the fast start repeat count
The fast start feature enables a Network Connectivity Device to initially advertise itself at a faster
rate for a limited time when an LLDP-MED Endpoint has been newly detected or connected to the
network. This feature is important within a VoIP network, for example, where rapid availability is
crucial for applications such as emergency call service location (E911).
The fast start timer starts when a Network Connectivity Device receives the first LLDP frame from a
newly detected Endpoint.
The LLDP-MED fast start repeat count specifies the number of LLDP packets that will be sent
during the LLDP-MED fast start period. By default, the device will send three packets at one-second
intervals. If desired, you can change the number of packets the device will send per second, up to a
maximum of 10.
NOTE
The LLDP-MED fast start mechanism is only intended to run on links between Network Connectivity
devices and Endpoint devices. It does not apply to links between LAN infrastructure elements,
including between Network Connectivity devices, or to other types of links.
To change the LLDP-MED fast start repeat count, enter commands such as the following.
Brocade(config)#lldp med fast-start-repeat-count 5
The above command causes the device to send five LLDP packets during the LLDP-MED fast start
period.
Syntax: [no] lldp med fast-start-repeat-count value
where value is a number from 1 to 10, which specifies the number of packets that will be sent
during the LLDP-MED fast start period. The default is 3.
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).