56
4.4
Network
Redundancy
It
is
critical
for
industrial
applications
that
network
remains
non
‐
stop.
The
switch
firmware
supports
standard
RSTP,
Multiple
Super
Ring,
Rapid
Dual
Homing.
Multiple
Super
Ring
(MSR)
technology
ranks
the
fastest
restore
and
failover
time
in
the
world,
0
ms
for
restore
and
about
5
milliseconds
for
failover
for
copper.
Advanced
Rapid
Dual
Homing
(RDH)
technology
also
facilitates
the
switch
to
connect
with
a
core
managed
switch
easily
and
conveniently.
With
RDH
technology,
you
can
also
couple
several
Rapid
Super
Rings
or
RSTP
cloud
together,
which
is
also
known
as
Auto
Ring
Coupling.
Besides
ring
technology,
the
switch
also
supports
802.1D
‐
2004
version
Rapid
Spanning
Tree
Protocol
(RSTP).
New
version
of
RSTP
standard
includes
802.1D
‐
1998
STP,
802.1w
RSTP.
Following
commands
are
included
in
this
group:
4.4.1
RSTP
4.4.2
RSTP
Info
4.4.3
Multiple
Super
Ring
4.4.4
Ring
Info
4.4.5
Command
Lines
for
Network
Redundancy
4.4.1
RSTP
RSTP
is
the
abbreviation
of
Rapid
Spanning
Tree
Protocol.
If
a
switch
has
more
than
one
path
to
a
destination,
it
will
lead
to
message
loops
that
can
generate
broadcast
storms
and
quickly
bog
down
a
network.
The
spanning
tree
was
created
to
combat
the
negative
effects
of
message
loops
in
switched
networks.
A
spanning
tree
uses
a
spanning
tree
algorithm
(STA)
to
automatically
sense
whether
a
switch
has
more
than
one
way
to
communicate
with
a
node.
It
will
then
select
the
best
path
(primary),
and
block
the
other
path(s).
It
will
also
keep
track
of
the
blocked
path(s)
in
case
the
primary
path
fails.
Spanning
Tree
Protocol
(STP)
introduced
a
standard
method
to
accomplish
this.
It
is
specified
in
IEEE
802.1D
‐
1998.
Later,
Rapid
Spanning
Tree
Protocol
(RSTP)
was
adopted
and
represents
the
evolution
of
STP,
providing
much
faster
spanning
tree
convergence
after
a
topology
change.
This
is
specified
in
IEEE
802.1w.
In
2004,
802.1w
is
included
into
802.1D
‐
2004
version.
This
switch
supports
both
RSTP
and
STP
(all
switches
that
support
RSTP
are
also
backward
compatible
with
switches
that
support
only
STP).
This
page
allows
you
to
enable/disable
RSTP,
configure
the
global
setting
and
port
settings.
Содержание MDI-110 Series
Страница 1: ...1 MDI 110 Series User s Manual Industrial Managed Ethernet Switch ...
Страница 55: ...55 FLAGS I Individual P In channel D Port Down Trunk Group GroupID Protocol Ports 2 Static 6 D 7 P Switch ...
Страница 127: ...127 5 3 Revision History Edition Date Modifications V0 1 2010 10 11 The first version ...
Страница 128: ...128 ...