Link Aggregation Control Protocol (LACP)
4-34 Port Configuration
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no
longer
valid,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
Table 4
‐
5
defines
key
terminology
used
in
LACP
configuration.
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.
Note:
The path cost of a LAG port will be displayed as zero when it is not an active link.
Table 4-5 LACP Terms and Definitions
Term
Definition
Aggregator
Virtual port that controls link aggregation for underlying physical ports. Each
G-Series module provides 6 aggregator ports, which are designated in the
CLI as
lag.0.1
through
lag.0.6
.
LAG
Link Aggregation Group. Once underlying physical ports (for example,
ge
.x.x
)
are associated with an aggregator port, the resulting aggregation will be
represented as one LAG with a
lag.x.x
port designation.
G-Series LAGs can have up to associated physical ports.
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...
