Link Aggregation Control Protocol (LACP)
SecureStack C2 Configuration Guide
5-33
them
dynamically.
Since
the
protocol
is
based
on
the
IEEE
802.3ad
specification,
any
switch
from
any
vendor
that
supports
this
standard
can
aggregate
links
automatically.
802.3ad
LACP
aggregations
can
also
be
run
to
end
‐
users
(that
is,
a
server)
or
to
a
router.
LACP Operation
For
each
aggregatable
port
in
the
device,
LACP:
•
Maintains
configuration
information
(reflecting
the
inherent
properties
of
the
individual
links
as
well
as
those
established
by
management)
to
control
aggregation.
•
Exchanges
configuration
information
with
other
devices
to
allocate
the
link
to
a
Link
Aggregation
Group
(LAG).
•
Attaches
the
port
to
the
aggregator
used
by
the
LAG,
and
detaches
the
port
from
the
aggregator
when
it
is
no
longer
used
by
the
LAG.
•
Uses
information
from
the
partner
device’s
link
aggregation
control
entity
to
decide
whether
to
aggregate
ports.
The
operation
of
LACP
involves
the
following
activities:
•
Checking
that
candidate
links
can
actually
be
aggregated.
•
Controlling
the
addition
of
a
link
to
a
LAG,
and
the
creation
of
the
group
if
necessary.
•
Monitoring
the
status
of
aggregated
links
to
ensure
that
the
aggregation
is
still
valid.
•
Removing
a
link
from
a
LAG
if
its
membership
is
no
longer
valid,
and
removing
the
group
if
it
no
longer
has
any
member
links.
In
order
to
allow
LACP
to
determine
whether
a
set
of
links
connect
to
the
same
device,
and
to
determine
whether
those
links
are
compatible
from
the
point
of
view
of
aggregation,
it
is
necessary
to
be
able
to
establish
•
A
globally
unique
identifier
for
each
device
that
participates
in
link
aggregation.
•
A
means
of
identifying
the
set
of
capabilities
associated
with
each
port
and
with
each
aggregator,
as
understood
by
a
given
device.
•
A
means
of
identifying
a
LAG
and
its
associated
aggregator.
LACP Terminology
defines
key
terminology
used
in
LACP
configuration.
Note:
Earlier (proprietary) implementations of port aggregation referred to groups of aggregated
ports as “trunks”.
Note:
A given link is allocated to, at most, one Link Aggregation Group (LAG) at a time. The
allocation mechanism attempts to maximize aggregation, subject to management controls.
Table 5-5
LACP Terms and Definitions
Term
Definition
Aggregator
Virtual port that controls link aggregation for underlying physical ports. Each
SecureStack C2 module provides 6 aggregator ports, which are designated in
the CLI as
lag.0.1
through
lag.0.6
.
Содержание SecureStack C2
Страница 1: ...SecureStack C2 Stackable Switches Configuration Guide Firmware Version 5 1 xx P N 9033991 16 ...
Страница 2: ......
Страница 28: ...xxvi ...
Страница 106: ...set ssl 3 52 Basic Configuration ...
Страница 226: ...Creating a Basic SNMP Trap Configuration 6 38 SNMP Configuration ...
Страница 278: ...show spantree nonforwardingreason 7 52 Spanning Tree Configuration ...
Страница 302: ...set garp timer 8 24 802 1Q VLAN Configuration ...
Страница 448: ...show dhcp pool configuration 14 30 DHCP Server Configuration ...
Страница 454: ...no license advanced 15 6 Preparing for Router Mode ...