Specifications
Configuring MSTP
March 14, 2011 Page 18 of 29
show spantree operedge [port port-string]
Astatusof“true”or“Edge‐Port”indicatestheportisoperatingasanedgeport.
Astatusof“false”or“Non‐Edge‐Port”indicatesitisnot.
Ifport‐stringisnotspecified,edgeportstatuswillbedisplayedforallSpanningTreeports.
4. Displaytheedgeportadministrativestatusof
oneormoreport(s):
show spantree adminedge [port port-string]
Astatusof“true”or“Edge‐Port”indicatestheportisadministrativelysettobeconsideredan
edgeport.
Astatusof“false”or“Non‐Edge‐Port”indicatestheportisadministrativelysettobe
consideredanonedgeport.
Ifport‐stringisnotspecified,edgeportadministrativestatuswillbe
displayedforallSpanning
Treeports.
5. Ifnecessary,changetheedgeportadministrativestatusofoneormoreport(s):
set spantree adminedge port-string true
Configuring MSTP
InorderforMSTPtoprovidemultipleforwardingpaths,thefollowingmusthappen:
•Theconfigurationidentifiermustmatchonallbridgeswithintheregion.
•Allbridgesmustbewithinthesameregion.
•AllbridgesmustbeconnectedtoMSTP‐awarebridges.(Theycanbeconnectedusingashared
mediasuchasa
repeaterprovidedthatasingleSpanningTreedevicedoesnotresideonthat
LAN).
ThissectionprovidesinformationaboutthefollowingMSTPtasks:
• Example:SimpleMSTPConfigurat ion(page18)
• AdjustingMSTPParameters(page19)
• MonitoringMSTP(page19)
Example: Simple MSTP Configuration
ThefollowingexampledescribessettingupthesimpleMSTPnetworkshowninFigure 7.By
default,eachswitchingdevicewillbeinitsownMSTregionusingitsownMACaddressasthe
MSTconfigurationID.ThisconfigurationgroupsSwitch1andSwitch2intoasingleMSTregion
withan
MSTIconfigurationnameof“South.”ItmapsVLAN2toMSTISID2andVLAN3to
MSTISID 3.
Note: A single Spanning Tree device between two MSTP bridges will terminate the ability to have
multiple forwarding paths.