10
EdgeSwitch User Guide
Ubiquiti Networks, Inc.
Chapter 3: Dashboard
• Delete Click the Delete
icon to remove an
existing LAG. Then click OK to confirm.
• Save Click to apply changes.
(Powercycle) To power off the connected device
for fiveseconds and then power it back on, click the
Powercycle icon.
(Advanced Settings) To configure advanced settings,
click the Advanced Settings icon.
Advanced Settings
• Enable Port Enabled by default. Deselect to disable.
Note: Enabling/disabling this option only affects
data traffic on a port. PoE functionality remains
unaffected.
• Isolate Port Disabled by default. Select this option to
mark this port as an isolated port. Isolated ports cannot
communicate directly with any other isolated port.
• Flow Control Disabled by default. Select this option to
enable 802.3x Ethernet Flow Control. This should remain
disabled, unless you have a specific requirement for
802.3x and understand its implications.
• DHCP Snooping Disabled by default. DHCP snooping
monitors DHCP messages between clients and servers
and builds a database of trusted sources. If enabled, only
DHCP server messages from trusted sources are allowed.
• STP Enabled by default. Ethernet networks cannot
have multiple active paths between switches (excluding
aggregation such as LAG), as this causes a switching
loop: broadcast and multicast traffic is amplified
and repeated in a never-ending loop, disrupting the
network. Spanning Tree prevents switching loops
and allows for redundant interconnections between
switches. Interfaces with redundant paths are put into
STP blocking mode, leaving the port down unless the
current best active path fails.
Deselecting this option will disable all versions of
spanning tree; however, this is not recommended, as it
can leave the network susceptible to being taken down
by an inadvertently created switching loop.
- Edge Port Select Auto, Enable, or Disable. If
enabled, designates this port as a port that connects
to only a host device. The host device must not be
connected to another switch or router. The Edge Port
is always in the forwarding state and never undergoes
the learning or blocking state. The default is Auto.
Note: Ensure that the Edge Port is connected to
only a host device. If the Edge Port is connected to
a switch or router (even indirectly through a host
device), then this may cause a network loop.
- Priority STP uses Priority as a tiebreaker when
multiple ports have the same Path Cost value. The
lower the value, the higher the priority. If multiple
ports have the same Path Cost value, then STP chooses
the port with the highest Priority (lowest value) as the
active port (the others are blocked). If STP detects a
network loop, then a port with higher Priority is less
likely to be blocked. If multiple ports share the highest
Priority, then STP enables the port with the lowest
port ID. The Priority range is 0 (highest priority) to 255
(lowest priority).The default is 128.
- Path Cost STP uses Path Cost to determine the best
path between devices. The lower the value, the
higher the ranking. In most cases, specify lower values
for ports with higher bandwidths, such as gigabit
speeds, and specify higher values for ports with lower
bandwidth. You can also specify lower values for ports
you prefer to use. (Path Cost has precedence over
Priority.) The default is 0.
• PoE Mode Select the appropriate option: Off, 24V, or
PoE+. The default is PoE+, which is auto-sensing.
• PoE Ping Watchdog Disabled by default. Ping
Watchdog is only for PoE-enabled ports. If enabled,
it configures the device to continuously ping a user-
defined IP address (it can be the internet gateway, for
example). If it is unable to ping under the user-defined
constraints, then the device will automatically turn off
PoE on the port, and then turn it back on. This option
creates a kind of “fail-proof” mechanism.