DES-3550 Layer 2
Fast Ethernet Switch User’s Guide
54
Bridge Forward
Delay: (4 - 30 sec)
<
15
>
The Forward Delay can be from 4 to 30 seconds. This is the time any port on
the Switch spends in the listening state while moving from the blocking state
to the forwarding state.
Bridge Priority: (0 -
61440)
<
32768
>
A Priority for the Switch can be set from 0 to 61440. This number is used in
the voting process between switches on the network to determine which
switch will be the root switch. A low number indicates a high priority, and a
high probability that this switch will be elected as the root switch.
STP Version
<
RSTP
>
Choose RSTP (default) or STP Compatibility. Both versions use STP
parameters in the same way. RSTP is fully compatible with IEEE 802.1d
STP and will function with legacy equipment.
Tx Hold Count
<
3
>
This is the maximum number of Hello packets transmitted per interval. The
count can be specified from 1 to 10. Default value = 3.
Forwarding BPDU
<
Enabled
>
This field can be enabled or disabled. When it is enabled, it allows the
forwarding of STP BPDU packets from other network devices when STP is
disabled on the Switch. The default is enabled.
Click
Apply
to implement the changes made.
Note
: The Hello Time cannot be longer than the Max. Age. Otherwise, a
configuration error will occur.
Observe the following formulas when setting the above parameters:
Max. Age
≤
2 x (Forward Delay - 1 second)
Max. Age
≥
2 x (Hello Time + 1 second)
STP Port Settings
To view the STP Port Settings window, click its link in the
Configuration
folder, displaying
the following screen:
