© Copyright Lenovo 2017
Chapter 8: VLANs
147
VLAN Topologies and Design Considerations
By
default,
the
Enterprise
NOS
software
is
configured
so
that
tagging
is
disabled
on
all
external
ports
and
on
all
internal
ports.
By
default,
the
Enterprise
NOS
software
is
configured
so
that
all
internal
ports
are
members
of
VLAN
1.
By
default,
the
Enterprise
NOS
software
is
configured
so
that
the
management
port
is
a
member
of
the
default
management
VLAN
4095.
Multiple
management
VLANs
can
be
configured
on
the
switch,
in
addition
to
the
default
VLAN
4095,
using
the
following
commands:
When
using
Spanning
Tree,
STG
2
‐
128
may
contain
only
one
VLAN
unless
Multiple
Spanning
‐
Tree
Protocol
(MSTP)
mode
is
used.
With
MSTP
mode,
STG 1
to
32
can
include
multiple
VLANs.
VLAN Configuration Rules
VLANs
operate
according
to
specific
configuration
rules.
When
creating
VLANs,
consider
the
following
rules
that
determine
how
the
configured
VLAN
reacts
in
any
network
topology:
All
ports
involved
in
aggregation
and
port
mirroring
must
have
the
same
VLAN
configuration.
If
a
port
is
on
a
LAG
with
a
mirroring
port,
the
VLAN
configura
‐
tion
cannot
be
changed.
For
more
information
about
aggregation,
see
If
a
port
is
configured
for
port
mirroring,
the
port’s
VLAN
membership
cannot
be
changed.
For
more
information
on
configuring
port
mirroring,
see
.
Management
VLANs
must
contain
the
management
port,
and
can
include
one
or
more
internal
ports
(INT
x
).
External
ports
(EXT
x
)
cannot
be
members
of
any
management
VLAN.
CN 4093(config)#
vlan
<VLAN
ID
(1
‐
4094)>
CN 4093(config-vlan)#
management
Summary of Contents for Flex System Fabric CN4093
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