Configuring Spanning Tree Bridge Parameters
Enterasys G-Series CLI Reference 6-3
learning
and
the
priority
vector
is
worse
than
that
already
held
by
the
port.
If
a
disputed
BPDU
is
received,
the
port
is
forced
to
the
listening
state.
When
an
inferior
designated
BPDU
with
the
learning
bit
set
is
received
on
a
designated
port,
its
state
is
set
to
discarding
to
prevent
loop
formation.
Note
that
the
Dispute
mechanism
is
always
active
regardless
of
the
configuration
setting
of
Loop
Protection.
Loop
Protect
operates
as
a
per
port,
per
MST
instance
feature.
It
should
be
set
on
inter
‐
switch
links.
It
is
comprised
of
several
related
functions:
•
Control
of
port
forwarding
state
based
on
reception
of
agreement
BPDUs
•
Control
of
port
forwarding
state
based
on
reception
of
disputed
BPDUs
•
Communicating
port
non
‐
forwarding
status
through
traps
and
syslog
messages
•
Disabling
a
port
based
on
frequency
of
failure
events
Port
forwarding
state
in
the
designated
port
is
gated
by
a
timer
that
is
set
upon
BPDU
reception.
It
is
analogous
to
the
rcvdInfoWhile
timer
the
port
uses
when
receiving
root
information
in
the
root/
alternate/backup
role.
There
are
two
operational
modes
for
Loop
Protect
on
a
port.
If
the
port
is
connected
to
a
device
known
to
implement
Loop
Protect,
it
uses
full
functional
mode.
Otherwise
the
port
operates
in
limited
functional
mode.
Connection
to
a
Loop
Protect
switch
guarantees
that
the
alternate
agreement
mechanism
is
implemented.
This
means
the
designated
port
can
rely
on
receiving
a
response
to
its
proposal
regardless
of
the
role
of
the
connected
port,
which
has
two
important
implications.
First,
the
designated
port
connected
to
a
non
‐
root
port
may
transition
to
forwarding.
Second,
there
is
no
ambiguity
when
a
timeout
happens;
a
Loop
Protect
event
has
occurred.
In
full
functional
mode,
when
a
type
2
BPDU
is
received
and
the
port
is
designated
and
point
‐
to
‐
point,
the
timer
is
set
to
3
times
helloTime.
In
limited
functional
mode
there
is
the
additional
requirement
that
the
flags
field
indicate
a
root
role.
If
the
port
is
a
boundary
port
the
MSTIs
for
that
port
follow
the
CIST,
that
is,
the
MSTI
port
timers
are
set
according
to
the
CIST
port
timer.
If
the
port
is
internal
to
the
region
then
the
MSTI
port
timers
are
set
independently
using
the
particular
MSTI
message.
Message
age
expiration
and
the
expiration
of
the
Loop
Protect
timer
are
both
Loop
Protect
events.
A
notice
level
syslog
message
is
produced
for
each
such
event.
Traps
may
be
configured
to
report
these
events
as
well.
A
syslog
message
and
trap
may
be
configured
for
disputed
BPDUs.
It
is
also
configurable
to
force
the
locking
of
a
SID/port
for
the
occurrence
of
one
or
more
events.
When
the
configured
number
of
events
happen
within
a
given
window
of
time,
the
port
is
forced
into
blocking
and
held
there
until
it
is
manually
unlocked
via
management.
Configuring Spanning Tree Bridge Parameters
Purpose
To
display
and
set
Spanning
Tree
bridge
parameters,
including
device
priorities,
hello
time,
maximum
wait
time,
forward
delay,
path
cost,
and
topology
change
trap
suppression.
Содержание G3G170-24
Страница 1: ...Enterasys G Series Ethernet Switch CLI Reference Firmware Version 1 00 xx P N 9034358 01...
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Страница 30: ...xxviii...
Страница 100: ...set ssl 2 56 Basic Configuration...
Страница 132: ...clear lldp port tx tlv 3 32 Discovery Protocol Configuration...
Страница 272: ...show spantree nonforwardingreason 6 52 Spanning Tree Configuration...
Страница 296: ...set garp timer 7 24 802 1Q VLAN Configuration...
Страница 384: ...clear nodealias config 11 34 Logging and Network Management...
Страница 438: ...Enabling Router Configuration Modes 14 4 Preparing for Router Mode...
Страница 514: ...show ip pimsm staticrp 16 56 IPv4 Routing Protocol Configuration...
Страница 524: ...traceroute ipv6 17 10 IPv6 Management...
Страница 602: ...show ipv6 ospf virtual link 19 46 OSPFv3 Configuration...
