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Bundle Max
If there any exist suitable link partner, each LACP group automatically forms an aggregation for all of its
members. The number of members can be restricted by setting the max bundle value to a number less
than the number of group members. When the numbers of members who have formed aggregation reach
the specified value, the remaining ports are set to standby and do not forward any frames. If an active
member goes down, then a standby member will take over. The priority assignment controls to which
member goes active/standby.
Revertive/Non-Revertive
The LACP group can be configured to be revertive (default) or non-revertive. When a higher priority port is
in active/standby configuration comes back up, it becomes active again and the current active port (if it has
lower priority) becomes standby, unless the group is configured to be non-revertive. In non-revertive mode,
if a port comes back up, nothing changes and the traffic is not disturbed.
Note:
Each time a link changes, the traffic is halted until the new aggregation (key) is fully set up.
1:1 Active (Standby) LACP
To achieve 1:1 active/standby configuration, create a group with two ports and configure one of the ports
as bundle max. One of the ports, with higher priority, actively forwards traffic while the other remains in
standby mode. The port, in standby mode, does not forward any frames other than BPDUs. The LACP state
of the standby port is in no sync state. If the active port goes down, the standby port takes over. When the
failed port becomes operational, it takes over the frame forwarding (unless configured not to -
non-revertive) operation.
LACP State Information
The states of the LACP protocol (partner and actor) are visible through show lacp neighbor detail and
show lacp internal detail commands.
CLI
The CLI syntax (for configuration and status) follows the Cisco IOS port-channel style. Port-channel is
called aggregation in WoMaster terms.
ICLI Commands
The following sections describe the implementation of the preciously discussed LACP features through ICLI commands.
Creating an Aggregation Group
The following snippet shows how to create an active LACP group with ports Gig 1/1-2 as members.
# conf t
(config)# interface GigabitEthernet 1/1-2
(config-if)# aggregation group 1 mode ?
active
Active LACP
on
Static aggregation
passive
Passive LACP
<cr>
(config-if)# aggregation group 1 mode active
Active can be replaced with passive and on.
Showing the Status of an Aggregation Group
The following snippet shows the status of the active LACP group, created in the previous chapter.
# show aggregation
Aggr ID Name Type
Speed
Configured
Aggregated
-------
----
-----------
--------
----------
----------
1
LLAG1
LACP_ACTIV
E
Undefined
Gi 1/1-2
none
Show the internal configuration and status.
