User Guide

Table Of Contents
Bridge GUI Guide: Network Configuration
56
3.2.2 STP Bridging
NOTE: Settings
other than
Bridge
Priority
on Configure ->
Administration -> Bridg-
ing Configuration
apply
only to FastPath Mesh
bridging and are greyed
out when
STP is select-
ed for Bridging Mode.
When STP is used for link management, the Fortress Bridge
can connect to other Fortress Bridges to form mesh networks
and, on separate BSSs, simultaneously serve as access points
(APs) to connect compatibly configured wireless devices to a
wireless LAN (WLAN).
STP is selected for Bridging Mode by default.
Bridging BSSs
BSSs enabled for wireless bridging automatically form STP
mesh network connections with compatibly configured bridging
BSSs on other Fortress Bridges.
NOTE: Fortress Se-
curity
is Enabled
for WDS-enabled BSSs,
Wi-Fi Security is Dis-
abled
, and these fields
are greyed out.
On Bridges equipped with multiple radios, the radio(s) fixed on
the 5 GHz 802.11a frequency band will generally be the most
appropriate for the bridging function. (These include Radio 2 in
the ES520 and ES820 and Radio 2, Radio 3 and Radio 4 in the
ES440.) BSSs configured on these radios are therefore
Enabled for WDS by default.
Access Point BSSs
Under STP link management, a BSS on which bridging is
disabled is acting as a conventional wireless AP.
On Bridges equipped with multiple radios, Radio 1 is generally
the better choice for the AP function, because it can be
configured to use the 2.4 GHz 802.11g frequency band. By
default, BSSs configured on Radio 1 are therefore
Disabled for
WDS.
Any wireless device within range of the Bridge’s radio can
connect to the Bridge-secured WLAN, if the connecting device:
is using the same RF band and channel as the Bridge radio
is using the same SSID as an AP BSS configured on the
Bridge
successfully meets all security requirements for connecting
to that BSS, if the BSS is configured to enforce security
measures
One of the Bridges in the network must act as the root switch in
the STP configuration. If a given root becomes unavailable, the
root role can be assumed by another Bridge in the network.
The network can experience significant traffic disruption in this
event, until the new STP root node has been established.
You can configure the order in which each Bridge in the
network will assume the STP root role, should Bridge(s) ahead
of it in the priority list become unavailable. The role of root is
taken by the Bridge in the network with the lowest STP
Bridge
Priority
number.
When the Bridge is in
STP Bridging Mode, STP must be enabled
across all devices on the Bridge-secured network.