Ubiquiti Networks airFibe5X - Manual (Page 26)

22
Chapter 1: Advanced Tab airFiber ® AF-5X User Guide
Ubiquiti Networks, Inc.
• Disabled The Track Radio Link option is disabled by
default. The Data port’s Ethernet link will always remain
up regardless of the RF link state.
• Use Timeout Duration This option is designed for use
by operators who are using in-band management. Two
timers control the Data port’s Ethernet link.
RF Link Ethernet Link Notes
Goes down for
the first time The Ethernet link goes
down and remains
down for the number
of seconds specified by
the Link Off Duration
timer.
The Ethernet link will
then come back up so
that the AF-5X can be
managed even when
the RF link is down.
Even if the RF link goes
back up before the
Link Off Duration timer
elapses, the Ethernet
link remains down.
The Ethernet link’s
downtime is long
enough to signal to
the customer’s routing
equipment that the
path is lost.
Goes down
for the
second time The Ethernet link
remains up as long as
time remains on the
Link Off Spacing timer.
When the Link Off
Spacing timer elapses,
then the Ethernet link
goes down again for
the number of seconds
specified by the Link
Off Duration timer. (This
happens only if the RF
link is still down.)
The Ethernet link’s
uptime is long enough
so the operator has
enough time to access
the AF-5X, make
configuration changes,
and save those changes.
Sufficient Ethernet link
uptime is vital when a
RF link is constantly up
and down.
If the Use Timeout Duration option is enabled, the Track
Radio Link option and the following timers are enabled:
- Link Off Duration The Link Off Duration timer
controls the length of time the Data port’s Ethernet
link will be down if the RF link goes down. Enter the
number of seconds that the Ethernet link should be
offline. For example, if this is set to 10 seconds, then
when the RF link goes down, the Ethernet link will go
down and remain down for 10 seconds (regardless of
the RF link state), and then it will go back up.
- Link Off Spacing The Link Off Spacing timer controls
the length of time the AF-5X will wait before allowing
the Data port’s Ethernet link to go down for a second
time if the RF link goes down again. Enter the
minimum interval (in seconds) between offline events
of the Ethernet link, regardless of the RF link status.
The value for Link Off Spacing should be larger than the
value for Link Off Duration, and it should be enough
time for the operator to access the AF-5X, make any
configuration changes, and apply those changes.
Note: If the Link Off Spacing timer is set to
0 seconds, then the Ethernet link will only use the
Link Off Duration timer. If the Link Off Duration
timer is set to 10 seconds and the RF link goes
down, then the Ethernet link will go down for
10 seconds and then go back up regardless of the
RF link state. If the RF link is still down, then the
Ethernet link will not go down again until the RF
link goes back up and then down again.
Here are a couple of examples involving the use of the
Use Timeout Duration option.
• Example #1
• Link Off Duration 5 seconds
• Link Off Spacing 60 seconds
The Data port’s Ethernet link will be initially
disconnected when the RF link first goes down. That
event will start a 60-second timer. The Ethernet link
will remain offline for 5 seconds (regardless of the RF
link status) and then come back online. The Ethernet
link will remain online (regardless of the RF link
state) until the 60-second timer expires.
• Example #2
• Link Off Duration 20 seconds
• Link Off Spacing 120 seconds
The Data port’s Ethernet link will be initially
disconnected when the RF link first goes down. That
event will start a 120-second timer. The RF link goes
back up after 10 seconds; however, that does not
affect the Ethernet link. The Ethernet link will remain
offline for 20 seconds and then come back online.
The RF link goes down again after 60 seconds;
however, that does not affect the Ethernet link.
The Ethernet link will then remain online until the
120-second timer expires.
• Enabled This option is designed for use by operators
who are not using in-band management. The Track
Radio Link option is enabled without timers, so the Data
port’s Ethernet link follows the RF link state exactly. If
the RF link goes down, then the Ethernet link goes down
and remains down until the RF link goes back up.