Specifications

Link Aggregation Overview
December 02, 2010 Page 8 of 23
Flow Regeneration
Flowregenerationdetermineshowflowswillbehavewhenanewportjoinsalinkaggregation.
Whenenabled,LACPwillredistributeallexistingflowsovertheLAG,takingintoaccountthe
newport(s)thatjoinedtheLAG.Itwillalsoattempttoloadbalanceexistingflowstotake
advantageofthenew
portthathasjoinedtheLAG.Whenflowregenerationisdisabledandanew
portjoinstheLAG,thedistributionofcurrentflowsremainsunchangedanddoesnottake
advantageofthenewport.AllnewflowswilltakeintoaccountthenewportontheLAG.Flow
regenerationis
disabledbydefault.
The Out-Port Algorithm
Theout‐portalgorithmdeterminesthecriteriatobeusedfordataforwardingportselection.There
arethreealgorithmcriteriatochoosefrom:
Administrative State A number of port level administrative states can be set for both the actor and partner
ports. The following port administrative states are set by default:
• lacpactive - Transmitting LACP PDUs is enabled.
• lacptimeout - Transmitting LACP PDUs every 30 seconds. If this state is
disabled, LACP PDUs are transmitted every 1 second. Note that the actor and
partner LACP timeout values must agree.
• lacpagg - Aggregation on this port is enabled.
• lacpsync - Transition to synchronization state is allowed.
• lacpcollect - Transition to collection state is allowed.
• lacpdist - Transition to distribution state is allowed.
• lacpdef - Transition to defaulted state is allowed.
• lacpexpire - Transition to expired state is allowed.
It is recommended that these default states not be changed unless you know what
you are doing. Contact Enterasys customer support should you need assistance
modifying port level administrative states.
Partner Default
System ID
A default partner system ID can be set. This is a default MAC address for the system
partner.
LACP PDU
processing
(Optional) LACP PDU processing can be enabled or disabled for this port.
Table 2 LAG Port Parameters (continued)
Term Definition
Note: The flow regeneration feature is supported on the N-Series and S-Series platforms only.
Note: The out-port algorithm feature is supported on the N-Series and S-Series platforms only.