14-115
Using the Web Browser Interface for Basic Configuration Tasks
Bridging
Table 14-1. Spanning Tree Timers
Configuring Spanning Tree Settings for Individual Interfaces
You can manually configure settings such as cost for the connection for each
bridged interface.
1. Select Spanning Tree from the navigation bar.
2. Scroll to the Spanning Tree Properties window and select Spanning Tree
Instance.
3. Select the interface that you want to configure from the Spanning Tree
Port Information window that is displayed.
4. The Spanning Tree Port Information window will display. (See Figure
14-84.) You can then alter certain settings:
a. You can alter the port priority for the connection. A lower priority
increases the connection’s chance of being selected. (Priority only
comes into account when two connections have the same cost.)
Select the priority from the ID pull-down menu.
b. RSTP allows point-to-point interfaces to assert sync to rapidly transi-
tion to the forwarding state. Interfaces automatically determine
whether they are on point-to-point or shared connections by their
duplex setting.
Timer Function Default Range
hello time Each forwarding interface periodically
transmits BPDU hellos. If neighbors miss three
hellos from an interface, they assume the
connection is down and send out TC BPDU to
this effect. Take care when altering this timer,
because incompatible settings can cause
devices to believe a connection is down when
it is not.
2 seconds 0 to 1,000,000
max age The device discards information from a BPDU
when its maximum age timer expires.
With STP, the timer determines how long a
device will wait to receive information on a
connection from the root before assuming the
connection is down.
20 seconds 6 to 40
forward delay The device waits this interval before
forwarding BPDU. With STP, this setting
determines how long the device stays first in
the listening and then in the learning stage.
15 seconds 4 to 30
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