456
G8332 Command Reference for ENOS 8.4
MSTP Configuration
Up
to
32
Spanning
Tree
Groups
can
be
configured
in
MSTP
mode.
MSTP
is
turned
off
by
default
and
the
default
STP
mode
is
PVRST.
Note:
When
Multiple
Spanning
Tree
is
turned
on,
VLAN
4095
is
moved
from
Spanning
Tree
Group
128
to
the
Common
Internal
Spanning
Tree
(CIST).
When
Multiple
Spanning
Tree
is
turned
off,
VLAN
4095
is
moved
back
to
Spanning
Tree
Group
128.
Table 224.
Multiple
Spanning
Tree
Configuration
Options
Command Syntax and Usage
spanning
tree
mst
configuration
Enables
MSTP
configuration
mode.
Command
mode:
Global
configuration
[no]
spanning
tree
mst
<0
‐
32>
enable
Enables
or
disables
the
specified
MSTP
instance.
Command
mode:
Global
configuration
spanning
tree
mst
<0
‐
32>
priority
<0
‐
65535>
Configures
the
bridge
priority
for
the
specified
MSTP
instance.
The
bridge
priority
parameter
controls
which
bridge
on
the
network
is
the
MSTP
root
bridge.
To
make
this
switch
the
root
bridge,
configure
the
bridge
priority
lower
than
all
other
switches
and
bridges
on
your
network.
The
lower
the
value,
the
higher
the
bridge
priority.
The
range
is
0
to
65535,
in
steps
of
4096
(0,
4096,
8192,
12288
...)
and
the
default
value
is
32768
.
Command
mode:
Global
configuration
no
spanning
tree
mst
<0
‐
32>
priority
Resets
the
bridge
priority
for
the
specified
MSTP
instance
to
the
default
value
of
32768
.
Command
mode:
Global
configuration
spanning
tree
mst
forward
time
<4
‐
30>
Configures
the
forward
delay
time
in
seconds.
The
forward
delay
parameter
specifies
the
amount
of
time
that
a
bridge
port
has
to
wait
before
it
changes
from
the
discarding
and
learning
states
to
the
forwarding
state.
The
default
value
is
15
.
Command
mode:
Global
configuration
spanning
tree
mst
max
age
<6
‐
40>
Configures
the
maximum
age
interval
in
seconds.
The
maximum
age
parameter
specifies
the
maximum
time
the
bridge
waits
without
receiving
a
configuration
bridge
protocol
data
unit
before
it
reconfigures
the
MSTP
network.
The
default
value
is
20
seconds.
Command
mode:
Global
configuration
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