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DES-3326S Layer 3 Fast Ethernet Switch User’s Guide
60 Switch Management and Operating Concepts
Bridge Identifier
(Not user-
configurable
except by setting
priority below)
A combination of the User-
set priority and the switch’s
MAC address. The Bridge
Identifier consists of two
parts: a 16-bit priority and
a 48-bit Ethernet MAC
address
32768 + MAC
Priority A relative priority for each
switch – lower numbers give
a higher priority and a
greater chance of a given
switch being elected as the
root bridge
32768
Hello Time The length of time between
broadcasts of the hello
message by the switch
2 seconds
Maximum Age
Timer
Measures the age of a
received BPDU for a port
and ensures that the BPDU
is discarded when its age
exceeds the value of the
maximum age timer.
20 seconds
Forward Delay
Timer
The amount time spent by a
port in the learning and
listening states waiting for a
BPDU that may return the
port to the blocking state.
15 seconds
Table 5-4. STP Parameters – Switch Level
The following are the user-configurable STP parameters for the
port or port group level:
Variable Description Default
Value
Port Priority A relative priority for each
port – lower numbers give a
hi
g
her
p
riorit
y
and a
g
reater
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