FibroLAN Falcon Gen-3 M-Class, Руководство пользователя

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Falcon M-Class | User Guide
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Table 4-150: LLDP MED Configuration Parameters
Fast start repeat count
Fast start repeat count Rapid startup and Emergency Call Service Location Identification Discovery of
endpoints is a critically important aspect of VoIP systems in general.
it is best to advertise only those pieces of information which are specifically relevant to
particular endpoint types (for example only advertise the voice network policy to
permitted voice-capable devices), both in order to conserve the limited LLDPU space
and to reduce security and system integrity issues that can come with inappropriate
knowledge of the network policy.
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 neighbour has been detected in order
share LLDP-MED information as fast as possible to new neighbors.
Because there is a risk of an LLDP frame being lost during transmission between
neighbors’, it is recommended to repeat the fast start transmission multiple times to
increase the possibility of the neighbors’ receiving the LLDP frame.
With Fast start repeat count it is possible to specify the number of times the fast
start transmission would be repeated. The recommended value is 4 times, given that 4
LLDP frames with a 1 second interval will be transmitted, when an 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 Network Connectivity Devices, or other types of links.
Transmit TLVs
It is possible to select which LLDP-MED information that shall be transmitted to the neighbors. When
the checkbox is checked the information is included in the frame transmitted to the neighbor.
Port The port name to which the configuration applies.
Capabilities When checked the switch's capabilities is included in LLDP-MED information transmitted.
Policies When checked the configured policies for the interface is included in LLDP-MED
information transmitted
Location When checked the configured location information for the switch is included in LLDP-
MED information transmitted