Cisco Fast Link Pulse (FLP) is a technology used in Ethernet networks to
detect the presence of a link between two devices. It is a form of signaling
that is sent over the physical Ethernet cable, and is used to quickly detect
when a device is plugged into a port or when a link goes down.
FLP works by sending a short pulse signal over the Ethernet cable when a
device is plugged into a port. This signal is sent at a rate of 10 pulses
per second, and is used to detect the presence of a link. If the pulse is
received by the device on the other end of the cable, it will respond with a
similar pulse, indicating that a link has been established.
One of the main advantages of FLP is its speed. Because the pulses are sent
at a high rate, devices can quickly detect when a link has been established,
and begin transmitting data. This is particularly important in
time-sensitive applications, such as voice and video, where delays can lead
to poor call quality and dropped frames.
Another advantage of FLP is its simplicity. Because the signaling is sent
over the Ethernet cable itself, there is no need for additional hardware or
software to detect the presence of a link. This makes FLP a cost-effective
and reliable way to detect link status.
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FLP is supported on a wide range of Cisco networking equipment, including
routers, switches, and access points. It is also a standardized technology,
and is supported by the IEEE 802.3 specification for Ethernet
networks.
In summary, Cisco Fast Link Pulse is a technology used in Ethernet networks
to quickly detect the presence of a link between two devices. It works by
sending a short pulse signal over the Ethernet cable, and is used to detect
when a device is plugged into a port or when a link goes down. FLP is fast,
simple, and reliable, and is supported on a wide range of Cisco networking
equipment.