Enterasys G-Series CLI Reference 6-1
6
Spanning Tree Configuration
This
chapter
describes
the
Spanning
Tree
Configuration
set
of
commands
and
how
to
use
them.
Spanning Tree Configuration Summary
Overview: Single, Rapid, and Multiple Spanning Tree Protocols
The
IEEE
802.1D
Spanning
Tree
Protocol
(STP)
resolves
the
problems
of
physical
loops
in
a
network
by
establishing
one
primary
path
between
any
two
devices
in
a
network.
Any
duplicate
paths
are
barred
from
use
and
become
standby
or
blocked
paths
until
the
original
path
fails,
at
which
point
they
can
be
brought
into
service.
RSTP
The
IEEE
802.1w
Rapid
Spanning
Protocol
(RSTP),
an
evolution
of
802.1D,
can
achieve
much
faster
convergence
than
legacy
STP
in
a
properly
configured
network.
RSTP
significantly
reduces
the
time
to
reconfigure
the
network’s
active
topology
when
physical
topology
or
configuration
parameter
changes
occur.
It
selects
one
switch
as
the
root
of
a
Spanning
Tree
‐
connected
active
topology
and
assigns
port
roles
to
individual
ports
on
the
switch,
depending
on
whether
that
port
is
part
of
the
active
topology.
RSTP
provides
rapid
connectivity
following
the
failure
of
a
switch,
switch
port,
or
a
LAN.
A
new
root
port
and
the
designated
port
on
the
other
side
of
the
bridge
transition
to
forwarding
through
an
explicit
handshake
between
them.
By
default,
user
ports
are
configured
to
rapidly
transition
to
forwarding
in
RSTP.
MSTP
The
IEEE
802.1s
Multiple
Spanning
Tree
Protocol
(MSTP)
builds
upon
802.1D
and
RSTP
by
optimizing
utilization
of
redundant
links
between
switches
in
a
network.
When
redundant
links
exist
between
a
pair
of
switches
running
single
STP,
one
link
is
forwarding
while
the
others
are
For information about...
Refer to page...
Spanning Tree Configuration Summary
6-1
Configuring Spanning Tree Bridge Parameters
6-3
Configuring Spanning Tree Port Parameters
6-31
Configuring Spanning Tree Loop Protect Parameters
6-38
Caution:
Spanning Tree configuration should be performed only by personnel who are very
knowledgeable about Spanning Trees and the configuration of the Spanning Tree Algorithm.
Otherwise, the proper operation of the network could be at risk.
Summary of Contents for G3G170-24
Page 1: ...Enterasys G Series Ethernet Switch CLI Reference Firmware Version 1 00 xx P N 9034358 01...
Page 2: ......
Page 30: ...xxviii...
Page 100: ...set ssl 2 56 Basic Configuration...
Page 132: ...clear lldp port tx tlv 3 32 Discovery Protocol Configuration...
Page 272: ...show spantree nonforwardingreason 6 52 Spanning Tree Configuration...
Page 296: ...set garp timer 7 24 802 1Q VLAN Configuration...
Page 384: ...clear nodealias config 11 34 Logging and Network Management...
Page 438: ...Enabling Router Configuration Modes 14 4 Preparing for Router Mode...
Page 514: ...show ip pimsm staticrp 16 56 IPv4 Routing Protocol Configuration...
Page 524: ...traceroute ipv6 17 10 IPv6 Management...
Page 602: ...show ipv6 ospf virtual link 19 46 OSPFv3 Configuration...
