© Copyright Lenovo 2016
Chapter 2: Information Commands
77
Spanning Tree Root Information
The
following
command
displays
information
about
the
root
bridge
ID
for
every
spanning
‐
tree
instance
and
the
path
cost
associated
to
it:
show
spanning
tree
root
Command
mode:
All
Instance
Root
ID
Path
Cost
Hello
MaxAge
FwdDel
Root
Port
1
8001
08:17:f4:32:95:00
0
2
20
15
0
3
8003
08:17:f4:32:95:00
0
2
20
15
0
6
8001
08:17:f4:fb:d8:00
20000
2
20
15
27
17
8011
08:17:f4:32:95:00
0
2
20
15
0
Table 33.
Bridge
Parameter
Descriptions
Parameter
Description
Instance
Spanning
Tree
instance
Root
ID
Indicates
the
root
switch
bridge
priority
and
MAC
address.
Path
‐
Cost
The
port
path
cost
is
used
to
help
determine
the
designated
port
for
a
segment.
Hello
The
hello
time
parameter
specifies,
in
seconds,
how
often
the
bridge
transmits
a
configuration
bridge
protocol
data
unit
(BPDU).
Any
bridge
that
is
not
the
root
bridge
uses
the
root
bridge
hello
value.
MaxAge
The
maximum
age
parameter
specifies,
in
seconds,
the
maximum
time
the
bridge
waits
without
receiving
a
configuration
bridge
protocol
data
unit
before
it
reconfigure
the
STP
network.
FwdDel
The
forward
delay
parameter
specifies,
in
seconds,
the
amount
of
time
that
a
bridge
port
has
to
wait
before
it
changes
from
discarding
state
to
learning
state
and
from
learning
state
to
forwarding
state.
Root
Port
The
elected
root
port
for
the
STP
instance
(port
used
to
reach
the
root
switch).
Summary of Contents for RackSwitch G8332
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