Specifications

Link Aggregation Overview
December 02, 2010 Page 9 of 23
• DestinationIPaddressandSourceIPaddress(dip‐sip).Thisisthemostfinelytunedcriteriain
thataportwillbeassignedbaseduponaspecificIPaddresscombinationfortheflow.All
flowsforthisIPaddresscombinationtransittheassignedphysicalport.
• DestinationMACaddressandSourceMAC
address(da‐sa).Thiscriteriaislessfinelytunedin
thataportwillbeassignedbasedupontheMACaddresscombinationfortheflow.Allflows
forthisMACaddresscombinationtransittheassignedport.
•Simpleroundrobin(round‐robin).Thisistheleastfinelytunedcriteriainthata
portis
assignedbaseduponthenextportinaroundrobinsequencewithnoconsiderationtothe
sourceordestinationoftheflow.
Static Port Assignment
Staticportassignmentallowsyoutoassignports toaLAGwhenthepartnerdevicedoesnot
supportLACP,butdoessupportanotherproprietaryformoflinkaggregation.Toassignastatic
port,specifytheLAGportID,theadminkeyvalueforthisLAG,andtheportstobeassigned.
If
youdonotspecifyanadminkeyvalue,akeywillbeassignedaccordingtothespecified 
aggregator.Forexample,akeyof4wouldbeassignedtolag.0.4.
Platform LAG and Physical Port Support
ThenumberofLAGsandthenumberofportsperLAGsupportedareplatformspecific.The
numberofLAGssupportedisonasystembasis.SeeTable 3foralistingofthenumberofLAGs
andthenumberofportsperLAGsupportedforyourplatform.
Note: The round robin out-port algorithm should not be assigned if fragmented frames exist in the
network. Use of round robin can result in the fragments being sent out different ports, causing out of
order packets.
Table 3 Enterasys Platform LAG Support
Enterasys Platform Number of LAGs Supported Number of Ports in a LAG
S-Series Modues 127 No Limitation
N-Series DFE Diamond Modules 62 No Limitation
N-Series DFE Platinum Modules 62 No Limitation
N-Series DFE Gold Modules 4 4
N Standalone (NSA) 48 No Limitation
Stackable switch (all platforms) 6 8
Standalone switch platforms 6 8
Note: For stackable platforms, the number of LAGs supported is per stack. A stack of stackable
switches operate as a single logical device.