Specifications

Link Aggregation Configuration Example
December 02, 2010 Page 15 of 23
WhichdevicedeterminesportselectionfortheLAGisanoptionalconsideration.Ifsystem
prioritiesremainatthedefaultvalue,thelowestMACaddressdevicedeterminesportselection
fortheLAG.Forpurposesofthisexample,wewillsetthesystempriorityoftheS3to100to
ensureitwill
controlportselectionforLAG1,insteadoftheS8.TheC3stackableswitchsystem
prioritywillbesetto100toensureitwillcontrolportselectionforLAG2,insteadoftheS8.Forthe
stackableswitchtocontrolportselectionforLAG3requiresthatyouensurethattheserver
hasa
systempriorityhigherthan100.
EachLAGinourexampleismadeupofphysicalportsofthesamespeed,sothereisnoneedtoset
theportprioritytoa non‐defaultvalue.Theonlyportvaluetobechangedistheadminkeyfor
eachphysical
portandeachLAG.ThesemodificationsaredetailedinTable 7onpage 15.
Table 7 LAG and Physical Port Admin Key Assignments
Device LAG LAG Admin Key Physical Port
Physical Port
Admin Key
S8 Distribution Switch 1 100 ge.1.1 100
ge.2.1 100
ge.3.1 100
ge.4.1 100
2 200 ge.1.2 200
ge.2.2 200
ge.3.2 200
ge.4.2 200
S3 Edge Switch 1 100 ge.1.1 100
ge.1.2 100
ge.2.1 100
ge.3.1 100
C3 Stackable Switch 2 200 ge.1.1 200
ge.1.2 200
ge.2.1 200
ge.2.2 200
3 300 ge.1.3 300
ge.1.4 300
ge.2.3 300
ge.2.4 300
Server 3 300 NIC1 ETH 300
NIC2 ETH 300
NIC3 ETH 300
NIC4 ETH 300